第一章 总论 - World Bank



World Bank-financed Jiangxi Poyang Lake Basin and Ecological Economic Zone Small Town Development Demonstration Project

Environmental Codes of Practice

For

Tunnel Subproject

Institute of Poyang Lake Eco-economics, Jiangxi University of Finance and Economics

Beijing Huaqing Lishui Environmental Technology Co., Ltd.

Environmental Engineering Technology Development Center, Jiangxi Academy of Sciences

September 2012

Table of Contents

1 Preface 2

2 Main Contents of the Project 2

3 Environmental Codes of Practice in Construction Period 4

3.1 Construction Site and Facilities Management 4

3.2 Ambient Air Quality Management 5

3.3 Acoustic Environment Quality Management 7

3.4 Water Environment Quality Management 8

3.5 Ecological Protection Management 10

3.6 Solid Wastes Treatment Management 11

3.7 Traffic 11

3.8 Safety, Explosive Management, and Procedures of Blasting Construction 12

3.9 Environmental Safety and Health 14

Appendix 1 Checklist of Environmental Protection at Construction Site 16

Map 1 Geographic Location Map 21

1. Preface

World Bank-financed Jiangxi Poyang Lake Basin and Ecological Economic Zone Small Town Development Demonstration Project is a demonstration project of Jiangxi Province, which aims to promote the harmonious development of ecological protection and urban construction, to improve urban and rural infrastructure, and to accelerate the urban and rural integration of the province by introducing international experiences with loan project as carrier, and according to Chinese urbanization development strategy as well as the urbanization demand of Jiangxi Poyang Lake Basin and Ecological Economic Zone. Under the World Bank-financed Jiangxi Poyang Lake Basin and Ecological Economic Zone Small Town Development Demonstration Project, the project involving tunnel subproject is the highway engineering which is from Dexing-Shangrao Expressway in Dexing City to Dexing Station of Hefei-Fuzhou Express Railway, and it is located in Dexing of Shangrao City. According to the requirements on environmental screening and classification of the Environmental and Social Safeguards --- Environmental Assessment (OP4.01) of the World Bank, and by executing environmental screening as per the type, position, sensitivity and scale of the project, as well as the characteristics and degree of its potential environmental impacts, we determine the project to be of type B. According to the requirements of the World Bank on environmental assessment, it is necessary to compile the Environmental Codes of Practice (ECOP). This annex includes the specific environmental impact analysis and corresponding ECOP for tunnel subproject; and together with the Environmental Codes of Practice for Small Civil Works (Annex 1.1), it forms the complete ECOP for tunnel subproject. In preparing this ECOP, we made reference to Detailed Rules of Jiangxi Province on Safe Construction, EHS Guidelines, operational policies and safeguard polices of the World Bank and other materials.

2. Main Contents of the Project

Under the World Bank-financed Jiangxi Poyang Lake Basin and Ecological Economic Zone Small Town Development Demonstration Project, the project involving tunnel subproject is Nanxi Tunnel subproject, which is a construction content of the highway engineering from Dexing-Shangrao Express Highway in Dexing City to Dexing Station of Hefei-Fuzhou Express Railway.

The highway engineering from Dexing-Shangrao Express Highway in Dexing City to Dexing Station of Hefei-Fuzhou Express Railway is located inside Longtoushan Town, Dexing City. It starts from the connecting exit of Xindong Line (S203) K29+500 and Nanxi Shangcheng (K0+000), passes by Shangcheng, hoggery, Longtoushan market town, and Nuanshui, and ends at the entrance of the Dexing Station Plaza of Hefei-Fuzhou Express Railway (K5+597.41). This is a 5.59741km south-north road, which is newly constructed according to the standard of secondary highway, and has the pavement constructed with cement concrete. The highway engineering from Dexing-Shangrao Express Highway in Dexing City to Dexing Station of Hefei-Fuzhou Express Railway forms a fast trunk road in Dexing City, and will be beneficial for promoting the rapid development of tourism industry of this city. The project location map is shown in Figure 1.

The tunnel involved in the highway engineering from Dexing-Shangrao Express Highway in Dexing City to Dexing Station of Hefei-Fuzhou Express Railway is Nanxi Tunnel. Located at K0+850~K1+700, the tunnel is 850m long, covers an area of 18700m2, and the dual-hole clear space is 11m×4.5m (width× height).

3. Environmental Codes of Practice in Construction Period

3.1 Construction Site and Facilities Management

3.1.1 Pollution Control Measures for Tunnel Construction:

(1) Dump slags at specified place, and strengthen the design of drainage for slag site;

(2) The seepage prevention and waterproof measures are to strengthen the water proofing function of lining, and to set up rubber waterstop for construction seam;

(3) Adopt sound insulation materials for inner wall of tunnel, and control the noise of vehicles;

(4) Strengthen ventilation, and improve the air quality;

(5) Strengthen the care and maintenance of equipment, and reduce the phenomena of evaporating, emitting, dripping or leaking;

(6) Never stack construction materials nearby mountain body, like asphalt, explosive, and chemicals, etc.

3.1.2 Preventive Measures for Excavation

(1) Determine the excavation steps and circulating footage reasonably, and maintain the mutual linkage and balanced construction of each excavation procedure;

(2)The size of excavated section shall meet the design requirements;

(3) After blasting, inspect the excavated surface and un-lined land section, and take measures to treat the possible dangers in time;

(4) Protect the gauging points for measurement, and do not damage the supporting,

lining and equipment during excavation;

(5) Check and sketch the geological structure, and record the places with geological changes and important land sections with pictures;

(6) Tunnel in rock shall be blasted by means of smooth blasting or presplitting blasting. During construction, it is required to raise the drilling efficiency and blasting effect, and to lower the consumption of materials;

(7) Proper variety and model of explosive shall be adopted for excavation and blasting, and nonel tube shall be adopted for blasting at land sections with water leakage and gushing;

(8) The operation of blasting and the management of gunpowder must observe relevant regulations of national existing standard Safety Regulations for Blasting. For tunnels with gas leakage, proper construction scheme shall be made according to the geological condition of worksite, the degree of gas leakage, and equipment conditions.

(9) When the tunnel excavated from both ends is to be linked up, workers at both ends shall strengthen contact with each other, the construction at both ends shall be under uniform command, and shallow holes and low dose shall be adopted to control blasting. When the distance between the two excavated ends is only 15m, single-way excavation shall be adopted, until the tunnel is completed.

(10) In case of dual-hole excavation, select a proper excavation method, determine the time difference for excavation of two holes, and take measures to prevent the excavation of later hole from producing adverse influences on the surrounding wall of the former excavated hole according to the space between the axial lines of two holes, the mileage distance at the entrance of holes, the geological conditions and other natural conditions.

3.2 Ambient Air Quality Management

The pollution to the ambient air quality in project construction period mainly includes the airborne dust produced from construction.

(1) During tunnel construction, plentiful poisonous gases or flue dust will be produced from blasting or passing through gas stratum, and dust pollution will be produced from spraying concrete; and such gases or flue dust and dust pollution will damage the physical health of construction personnel. So, stock ground and mixing station shall be built out of the wind, and measures shall be taken to prevent air-borne dust, such as watering the road surface frequently;

(2) Mechanical ventilation must be adopted for tunnel construction. The mode of ventilation shall be determined according to the length of tunnel, construction method, and equipment conditions, etc. Mixed ventilation method shall be preferred for long tunnels. When the ventilation of main engine can not surely meet the ventilation requirements of tunnel construction, it is necessary to set up local ventilation system, to connect the fans in a spaced and serial way, or add another route of flue pipe to increase the air supply. If there is an auxiliary tunnel, it shall be adopted for ventilation at the largest degree.

(3) The ventilation during tunnel construction shall ensure the maximum air supply demanded for various operations in the tunnel.

The air supply shall be calculated as per 3m3 fresh air/ person/ min. In case of operation with internal-combustion engine, the air supply for 1kW shall not be bigger than 3m3/min. The wind speed shall not be lower than 0.15m/s in case of full-section excavation, and shall not be lower than 0.25m/s in the tunnel; and anyway, it shall not be more than 6m/s.

As concerning ventilation at gas section, we shall supply fresh air to excavated surface, and dilute the gas content nearby the excavated surface to be lower than 1.0%; also, we shall discharge the gas to outside the tunnel hole with air exhaust pipe, and prevent the gas from flowing into the rear of tunnel.

(4) The selection and installation of vent pipe shall meet the following requirements:

① The diameter of vent pipe shall be determined after calculation, and the vent pipe shall matches with the fan; the diameter of a same pipeline shall be ensured accordant at the largest degree; and big-caliber vent pipe shall be selected for long and big tunnels.

② Suction-type air inlet nozzle or centralized air exhaust outlet shall be set outside the tunnel in the form of chimney, in order to prevent polluted air from flowing back into the tunnel.

③ The distance between vent pipe and excavated surface shall be determined according to concrete situations. The air outlet of pressure-type vent pipe shall not be more than 15m away from the excavated surface, while the air inlet of exhaust-type vent pipe shall not be more than 5m away from the excavated surface.

④ In case mixed ventilation is adopted, when one group of fans moves forward, the pipeline of another group of fans shall be extended accordingly, and the neighboring ends of the two groups of pipelines shall be always maintained staggered by 20-30m. In case of local ventilation, the air outlet of the exhaust-type vent pipe shall lead into the return air flow of the main air flow circulation.

⑤ Vent pipe shall be installed to ensure smooth state, air-tight joint, and that the radius of pipe bending is not smaller than 3 times the diameter of vent pipe.

⑥ Vent pipe, if damaged, must be repaired or replaced in time.

⑦ Pressure ventilation pipe shall be of soft rubber pipe, while suction pipe shall be of hard metal pipe or glass fiber reinforced plastic pipe.

(5) The installation and use of ventilator shall meet the following requirements:

① The main fan shall be installed according to the requirements of ventilation design; and auxiliary fan in the tunnel shall be installed in fresh air flow.

② Ventilator shall be equipped with security device, and shall stop automatically in case of failure.

③ There shall be a proper quantity of standby ventilators, and this quantity shall be equivalent to 50% of designed capacity.

(6) We shall test the air quantity, wind speed and wind pressure of ventilation, and check the air supply capacity and power consumption of ventilation equipment periodically.

(7) For tunnel construction, we shall adopt proper dustproof measures like ventilation and watering, etc., get done with personal protection, and test the concentration of dust and harmful gases periodically.

(8) For monitoring the air in tunnel, such as the concentration of dust and CO in tunnel, we shall adopt CO (gas) automatic alarm instrument.

3.3 Acoustic Environment Quality Management

Various noise sources will produce different degrees of impacts on the quality of the acoustic environment in project location at different stages of construction. We shall strengthen management, and take corresponding environment prevention and control measures to minimize the impacts.

(1) The construction unit must use construction machines & tools and transport vehicles meeting national related standards, and try to select low-noise construction machinery, for example, use hydraulic tools to replace pneumatic tools, and use low-noise bored pile to replace impact or vibration-type piling, etc.. Fixed mechanical equipment with big vibration shall be equipped with vibration-attenuation base; meanwhile, we shall maintain and operate the equipment correctly, ensure the sound operating status of transport vehicles and construction machinery, and try to maintain the noise of road building machinery at the minimum noise level.

(2) During tunnel construction, blasting will produce relatively big vibration wave. We shall select and use small-dose smooth blasting and presplitting blasting, or mechanical tunneling to reduce vibration. For blasting construction, we shall limit the blasting time, set up sound insulation door, and add sound insulation cover and sound insulation wall to construction machinery in the tunnel, such as air compressor, concrete mixer, and blower, etc.

(3) The construction schedule shall be arranged reasonably, in order to avoid simultaneous operation of multiple large-scale and high-noise machines at a same construction site. The construction shall be conducted without delay, so as to shorten the impacts of noises, and minimize the impacts of construction noise on operating personnel.

(4) Mechanical equipment producing big noises must be subject to vibration attenuation of foundation or equipped with vibration attenuation seat, and wrapped with damping materials;

(5) Noise from vehicle transport will possibly bring certain impacts on sensitive points in the acoustic environment along the line. So, the construction unit shall strengthen construction personnel’s awareness of environmental protection, find out local folk custom and habits in time, arrange transport time reasonably, and take corresponding measures like rate limiting and whistle forbidding, etc. for construction machinery including vehicles, etc. consciously aiming at ambient sensitive sections like resident gathering area, etc, in order to realize the effect of preventing and relieving the impacts of noises.

(6) The construction unit is suggested to arrange construction personnel reasonably, to reduce the working time of high-noise machinery operators, and to provide ear muffle for construction personnel to reduce the impacts of noises on them.

(7) All mechanical equipment shall be maintained and repaired periodically and effectively, in order to maintain their good status, and to reduce noises and extend the service life of equipment.

(8) We shall strictly control construction intensity, machinery and vehicle operators, and operating procedures, etc.

3.4 Water Environment Quality Management

3.4.1 Water Proofing and Drainage in Construction

(1) For the entrances at both ends of tunnel and that of auxiliary tunnel holes (wells), we shall prepare drainage system in time according to design requirements; and for stratum with thin cover and strong permeability, we shall treat surface water retention as early as possible.

(2) As concerning down slope drainage in tunnel, the gradient shall be accordant with that of the line, and shall meet the following requirements:

① The section of ditch shall meet the demand of draining percolation water and construction waste water in the tunnel;

② The ditch shall be set up at both sides or centre of tunnel without blocking construction by combining with structural drainage engineering;

③ Drainage facilities shall be cleaned up frequently to ensure unblocked water way.

(3) The following measures shall be adopted for reverse slope drainage in the tunnel:

① It is a must to draw water with machinery;

② We may adopt ditch or pipeline for drainage, or drain water out of tunnel by stages or at one stroke according to distance, gradient, water quantity and equipment, etc.;

③ Excavate reserve slope drainage ditch by sections according to the gradient of line. Excavate a sump at the end point of each section of down slope in order to make water flow into the sump; then pump water into next-section ditch, and make it flow into next sump. In this way, water will flow forward section by section, and finally be drained out of tunnel. The gradient of reserve slope ditch shall not be smaller than 0.5%;

④ For short tunnels, we may excavate a collector well nearby the excavated surface, and install a water pump to drain water out of tunnels at one stroke;

⑤ The section of sewer pipe and the volume of sump (collector well) shall be determined according to actual drainage;

⑥ The power of water pump shall be over 20% bigger than the power demanded for the drainage capacity, and there shall be standby water pump;

⑦ Make preparation for emergency drainage in case of power failure.

(4) In case of large-area seepage in tunnel, the water shall be lead into drainage ditch collectively by means of drilling. Detailed records shall be made about drilling position, quantity, aperture, depth, direction, and seepage, etc., in order to determine the position of drainage facilities behind arch wall during lining.

(5) In case water gushes in tunnel or underground water level is relatively high, well-points dewatering process and deep-well dewatering process may be adopted for treatment.

(6) In case there are parallel headings or horizontal holes during tunnel construction, we shall make the best of auxiliary heading to lower the water level of main tunnel, and guide the water in the main tunnel out through auxiliary heading.

(7) For drainage during tunnel construction in severe cold regions, we shall bury ditch and pipes below the freezing line, or take measures to keep warm.

(8) There shall be anti-seepage and anti-overflow facilities if a high-level pool is set up above the top of tunnel. In case the covered layer of the tunnel is thin and the permeability of water in stratum is strong, the pool shall be located away from the axial line of tunnel.

3.4.2 Treatment Process of Gushing Water

(1) The following auxiliary construction methods may be adopted for processing gushing water:

① Drainage by means of drilling or auxiliary tunnel in advance;

② Pre-grouting with small duct in advance;

③ Pre-grouting into wall rock to stop water in advance;

④ Well-points dewatering and deep-well dewatering.

(2) Drainage by means of auxiliary tunnel shall meet the following requirements:

① Auxiliary tunnel shall be parallel or nearly parallel to the main tunnel;

② The bottom elevation of auxiliary tunnel shall be lower than that of main tunnel;

③ The auxiliary tunnel shall be 10-20m advanced in comparison with the main tunnel, and shall be advanced by at least 1-2 circulating footage.

(3) Advanced drainage by drilling shall meet the following requirements:

① Light-weight water exploring drill or rock drill shall be used for drilling;

② The drilling position (hole bottom) shall be above water flow. During drilling, there shall be protective devices at the entrance of hole, in order to prevent personal and mechanical accidents;

③ Take measures to surely drain the water arising from drilling out of tunnel quickly.

④ The bottom of holes drilled in advance shall be advanced by 1-2 circulating footages in comparison with the excavated surface.

3.5 Ecological Protection Management

3.5.1 Ecological Environmental Impact Analysis

The tunnel subproject under the project is mainly the excavation of mountain body, and does not occupy any land. The project construction does not basically change the nature of lands at both sides of the line, and its impacts on ecological environment mainly includes the impacts on landscapes and water & soil. There are many factors affecting soil loss, mainly including rainfall, soil, vegetation, landform and topographic feature, and engineering construction, etc. As concerning the present project, the main factors affecting soil loss during construction period are rainfall and engineering construction.

3.5.2 Administrative Measures for Ecological Protection

(1) Reduce excavation at the roadbed of tunnel approach and the side slope at the entrance of tunnel, take reasonable excavation method, allocate earthwork properly, and prevent the spoil from sliding along slope and damaging the ecological environment. For the sake of convenient construction, the entrance to the tunnel is generally excavated directly to split the slope prior to construction of open cut tunnel. In order to protect the mountain slope at entrance to the tunnel from being destroyed, we may construct the open cut tunnel firstly, then carry out excavation by means of small-scale blasting inside the open cut tunnel. This can avoid plentiful soil loss as well as instability and sloughing of mountain body, etc., and protect the vegetation at entrance to the tunnel.

(2) Execute supporting treatment in time in case of collapse during construction, in order to prevent badly bleeding or crack of the earth’s surface at the top of tunnel, and adverse impacts on mountain body at the top.

3.6 Solid Wastes Treatment Management

Solid wastes during construction period are mainly from the foundation excavation and discarded stones arising from production. The main preventive measures are shown below:

(1) Slag loading equipment shall be able to exert high efficiency inside the tunnel excavation section, and its slag loading capacity shall be suitable for the quantity of earthwork excavated each time and the capacity of transport vehicle.

(2) Slag loading shall meet the following requirements:

① Mechanical slag loading shall be conducted strictly according to operating procedures, and shall not damage the existing supporting and interim equipment;

② When rail-mounted slag loading machinery is adopted, the rail shall follow closely the excavated surface, the shunting equipment shall move forward in time, or shuttle bogie and reversed loader, etc. shall be used for slag loading at border area;

③ In case of slag loading with hopper, there shall be protective equipment and liaison signal at the hopper, and the hopper shall be covered after completion of slag loading;

④ In case of drossing from steps or shed frame, the slag muck shall be stable, and shall be prevented from sloughing and hurting people.

(3) Slag unloading shall meet the following requirements:

① Arrange slag unloading line properly according to the conditions of slag disposal pit, the utilization of slag, and the type of vehicle; and slag unloading shall be conducted in turn on the arranged slag unloading line.

② Slag shall be unloaded with automatic slag unloading or mechanical slag unloading equipment; and special personnel shall be dispatched to take charge of slag unloading instruction and leveling-up during slag unloading;

③ Permanent drainage facilities and other protective engineering shall be built up at slag unloading site, in order to surely prevent surface runoff from eroding the slag pit;

④ In case of slag unloading by means of track transport, the slag unloading dock shall be built up solidly and equipped with hook and handrail; reliable car stopping device shall be set up at the end of rail.

3.7 Traffic

(1) In case trackless dump truck is adopted for transport in tunnels, the transport road shall have simple pavement. The road width and vehicle speed shall meet the following requirements:

① The net width of single lane shall be at least equal to the vehicle width plus 2m, and passing bay shall be set up at proper space interval; the net width of dual lanes shall be at least equal to 2 times of vehicle width plus 2.5m; and the range of visibility for meeting shall be 40m.

② The vehicle speed shall not be quicker than 10km/h at the land sections under construction and when one vehicle gives another the right of way, and shall not be quicker than 20km/h in the sections of tunnel completed.

(2) Special personnel shall be dispatched to repair and maintain the hauling track or road according to standard requirements, in order to keep it flat and unblocked. The slags and residual materials at both sides of the track or road shall be cleared off anytime.

(3) Transport vehicles must have good performance, and be operated according to relevant safety management regulations.

(4) During transportation of blasting materials, driver and passengers shall never smoke or carry kindling materials, fire sources, flammable and explosive, and electrified articles, and shall ensure the safety of blasting articles during transportation. The transport vehicle must be escorted by the safety personnel from blasting office and the blasting personnel from the construction team, shall not stop midway without just reasons, and must transport blasting articles to construction site immediately. Blasting articles shall be stacked in order, and shall not be unloaded to employees’ living area and other places endangering workers’ personal safety. After blasting articles are delivered out of warehouse, exploder, explosive and blasting fuse must be transported separately, instead of being transported together.

3.8 Safety, Explosive Management, and Procedures of Blasting Construction

1. Safety Operation Process of Blasting

(1) Before powder charge for blasting, we shall check whether there is any danger on working surface and whether the supporting nearby is solid; in case any dangerous stone is discovered, we shall eliminate dangers or fasten such stone before operation.

(2) Surely use high-pressure blast to blow away slurry and mountain flour from blastholes.

(3) Never charge power to newly drilled blastholes since the temperature of which is not high.

(4) Never use frozen or lytic explosive.

(5) Never use TNT or black explosive, etc, since they will produce plentiful harmful gases after blasting.

(6) Never smoke or use kindling at worksite.

(7) Surely use woody tool, instead of iron stick, for powder charge.

(8) Never charge powder for blasting in case the lighting is insufficient, or drift sand and mudflow are not treatment properly, or there is probably the gushing of plentiful karst cave water and high-pressure water.

(9) Surely charge power strictly according to the dose regulated in blasting design, and block up blastholes according to requirements.

(10) Never fill primer into blastholes by means of throwing, but instead, use a tamping bar to push the primer into blastholes lightly.

(11) Blasting inside tunnel must be under the uniform instruction of on-duty leader, and must be executed by full-time blasting personnel having accepted and passed professional training and holding the Certificate of Conformity for Blasting.

(12) Before blasting, all personnel and machines shall leave the site. The safety distance shall be at least 100m for blasting in single-head tunnel; at least 100m for blasting inside two neighboring upper and lower headings; at least 400m for blasting at upper half section of dual-line tunnel; and at least 500m for full-section blasting of dual-line tunnel.

(13) When the distance between the two ends of tunnels under two-way driving is less than 50m, the blasting at one end must be notified to the construction personnel at the other end in the form of written signature one hour ahead, and shall be executed within the time regulated.

(14) After blasting, on-duty personnel shall surely execute site inspection after 15min ventilation and smoke evacuation, and make sure that any danger has been eliminated prior to accessing the tunnel for construction.

(15) Drilling for powder charge shall not be executed in parallel generally. But this restriction does not work in case drilling bogie is adopted for parallel drilling, and the following measures are adopted for blasting by means of drilling:

a. Make detailed rules for operation, and submit them to relevant leader for approval;

b. On-duty principal takes charge of uniform command;

c. Powder charge and drilling must be executed from upside to downside;

d. Powder charge and drilling must be separated by a row of holes, and the total distance shall be at least 2.5m;

e. Powder charge and drilling personnel must be relatively fixed and be responsible for specified area; and shall never execute such operation vertically.

(16) Blasting devices shall be processed inside the processing room outside tunnel, and the processing room shall be set up at a lonely place at least 50m away from the entrance of tunnel.

(17) In case of deep tunneling, all blasting devices must be acquired by specified personnel from warehouse and sent to tunnel face; the residual blasting articles after powder charge must be returned to warehouse.

2. Safety operating procedures for blasting personnel

(1) Execute the post responsibility system for this type of work strictly, inspect the safety on operating surface, and solve any unsafe factor before start of operation.

(2) After drilling of blastholes, surely clear off slurry, water and broken stones, etc. from blastholes, in order to avoid out-of-joint during powder charge.

(3) Blasting supervisor shall prepare explosive and blasting materials, and transport them to operating site; inspect the quality of blastholes, process primer and charge powder to blastholes, send out the first caution signals, and prevent everybody from accessing the warning area (the caution signals may be whistle, tolling, bell ringing, red flag, and red light, etc.).

(4) Use a wooden stick to push the powder into blastholes lightly, and never use metal stick to tamp powder with big force (never use over-due and invalid blasting materials). When the preparation signal is sent out for the second time, non-blasting personnel shall all leave the worksite.

(5) Blasting must be under the command of special personnel, and be executed after all construction personnel, passersby, and vehicles arrive at a safe place, and the ignition signal is sent out for the third time.

(6) After completion of blasting, confirm that the powder in all blastholes has exploded, and send out the release signal for the fourth time. Then, blasting personnel may check whether there are blind shot and residual powder, etc.

(7) Listen and confirm the number of banger, dispose dumb shells (if there are) in time, and access the site for operation after safety confirmation.

3.9 Environmental Safety and Health

(1) Tunnel construction personnel must wear safety helmet and employee’s card when accessing worksite, and personnel not related to construction of the tunnel shall never access the construction site.

(2) Professional safety personnel shall be dispatched to take charge of the safety in construction of tunnel.

(3) At construction site, there must be various safety caution plates at striking positions.

(4) Set up fire fighting apparatuses and materials like fire extinguishers, etc. at bunker and living area; never use open fire at construction site and living area; and especially in forest zone, never smoke or make a fire.

Appendix 1 Checklist of Environmental Protection at Construction Site

|World Bank-financed Jiangxi Poyang Lake Basin and Ecological Economic Zone |No.: |

|Small Town Development Demonstration Project |Date: |

Notes for filling out the table: This table is a general checklist for inspection of environmental protection during construction period of the “World Bank-financed Jiangxi Poyang Lake Basin and Ecological Economic Zone Small Town Development Demonstration Project”, and may be added or adjusted properly if necessary according to concrete sub-projects, local environmental status and relevant environmental protection measures.

Subproject name: Contract No. And subproject location:

Name of project construction site:

Current construction stage:

Date of environmental protection inspection: Concrete time:

Weather of inspection day:

:ate:e 1 Geographic Location Map operators, and operating procedures, etc.r good status, Environment inspector:

|Inspection item |Inspection result(“√”) |Remark |

| |Yes |No |Not | | |

| | | |involve| | |

| | | |d | | |

| |(2) Whether the water proofing function of lining is strengthened, and | | | | |

| |whether rubber waterstop is set up for construction seam | | | | |

| |(3) Whether sound insulation materials are adopted for inner wall of tunnel,| | | | |

| |and the noise of vehicles is controlled | | | | |

| |(4) Whether ventilation is strengthened to improve the air quality | | | | |

| |(5) Whether working personnel have strengthened the care and maintenance of | | | | |

| |equipment to reduce the phenomena of evaporating, emitting, dripping or | | | | |

| |leaking; | | | | |

| |(6) Whether construction materials are stacked nearby mountain body, like | | | | |

| |asphalt, explosive, and chemicals, etc. | | | | |

| |Others (specified in detail) | | | | |

|II. |(1) Whether the excavation steps and circulating footage are determined | | | | |

|Preventive |reasonably to maintain the mutual linkage and balanced construction of each | | | | |

|Measures |excavation procedure | | | | |

|for | | | | | |

|Excavation | | | | | |

| |(2) Whether the size of excavated section meets the design requirements | | | | |

| |(3) Whether the excavated surface and un-lined land sections are inspected, | | | | |

| |and measures are taken to treat the possible dangers in time after blasting | | | | |

| |(4) Whether the gauging points for measurement are protected, and whether | | | | |

| |the supporting, lining and equipment are damaged during excavation | | | | |

| |(5) Whether the geological structure is checked and sketched, and whether | | | | |

| |the places with geological changes and important land sections are recorded | | | | |

| |with pictures | | | | |

| |(6) Whether tunnel in rock is blasted by means of smooth blasting or | | | | |

| |presplitting blasting; whether the drilling efficiency and blasting effect | | | | |

| |are raised, and the consumption of materials is lowered during construction | | | | |

| |(7) Whether proper variety and model of explosive is adopted for excavation | | | | |

| |and blasting, and whether nonel tube is adopted for blasting at land | | | | |

| |sections with water leakage and gushing | | | | |

| |(8) Whether the operation of blasting and the management of gunpowder | | | | |

| |observe relevant regulations of national existing standard Safety | | | | |

| |Regulations for Blasting; whether proper construction scheme is made | | | | |

| |according to the geological condition of worksite, the degree of gas | | | | |

| |leakage, and equipment conditions for tunnels with gas leakage | | | | |

| |(9) Whether workers at both ends strengthen contact with each other, | | | | |

| |whether the construction at both ends is under uniform command, and whether | | | | |

| |shallow holes and low dose are adopted to control blasting when the tunnel | | | | |

| |excavated from both ends is to be linked up; whether single-way excavation | | | | |

| |is adopted until the tunnel is completed when the distance between the two | | | | |

| |excavated ends is only 15m | | | | |

| |(10) In case of dual-hole excavation, whether a proper excavation method is | | | | |

| |adopted, the time difference for excavation of two holes is determined, and | | | | |

| |proper measures are taken to prevent the excavation of later hole from | | | | |

| |producing adverse influences on the surrounding wall of the former excavated| | | | |

| |hole according to the space between the axial lines of two holes, the | | | | |

| |mileage distance at the entrance of holes, the geological conditions and | | | | |

| |other natural conditions | | | | |

|III. |(1) During tunnel construction, plentiful poisonous gases or flue dust will | | | | |

|Ambient Air|be produced from blasting or passing through gas stratum, and dust pollution| | | | |

|Quality |will be produced from spraying concrete; and such gases or flue dust and | | | | |

|Management |dust pollution will damage the physical health of construction personnel. | | | | |

| |Aiming at the abovementioned, whether stock ground and mixing station are | | | | |

| |built out of the wind, and whether proper measures are taken to prevent | | | | |

| |air-borne dust, such as watering the road surface frequently | | | | |

| |(2) Whether mechanical ventilation is adopted for tunnel construction | | | | |

| |(3) Whether the ventilation during tunnel construction can ensure the | | | | |

| |maximum air supply demanded for various operations in the tunnel | | | | |

| |(4) Whether the air quantity, wind speed and wind pressure of ventilation, | | | | |

| |and check the air supply capacity and power consumption of ventilation | | | | |

| |equipment are tested periodically | | | | |

| |(5) Whether working personnel adopt proper dustproof measures like | | | | |

| |ventilation and watering, etc. for tunnel construction, get done with | | | | |

| |personal protection, and test the concentration of dust and harmful gases | | | | |

| |periodically | | | | |

| |(6) Whether CO (gas) automatic alarm instrument is equipped for monitoring | | | | |

| |the air in tunnel, such as the concentration of dust and CO in tunnel | | | | |

|IV. Water |(1) Whether drainage system is prepared in time according to design | | | | |

|Environment|requirements for the entrances at both ends of tunnel and that of auxiliary | | | | |

|Quality |tunnel holes (wells); and whether surface water retention is treated as | | | | |

|Management |early as possible for stratum with thin cover and strong permeability | | | | |

| |(2) Whether the gradient of down slope is accordant with that of the line in| | | | |

| |case of down slope drainage in tunnel | | | | |

| |(3) Whether the water is lead into drainage ditch collectively by means of | | | | |

| |drilling in case of large-area seepage in tunnel; whether detailed records | | | | |

| |are made about drilling position, quantity, aperture, depth, direction, and | | | | |

| |seepage, etc., in order to determine the position of drainage facilities | | | | |

| |behind arch wall during lining | | | | |

| |(4) Whether well-points dewatering process and deep-well dewatering process | | | | |

| |are adopted for treatment in case water gushes in tunnel or underground | | | | |

| |water level is relatively high | | | | |

| |(5) Whether auxiliary heading is fully utilized to lower the water level of | | | | |

| |main tunnel, and guide the water in the main tunnel out through auxiliary | | | | |

| |heading in case there are parallel headings or horizontal holes during | | | | |

| |tunnel construction | | | | |

| |(6) Whether the ditch and pipes are buried below the freezing line, or | | | | |

| |measures are taken to keep warm for drainage during tunnel construction in | | | | |

| |severe cold regions | | | | |

| |(7) Whether there are anti-seepage and anti-overflow facilities if a | | | | |

| |high-level pool is set up above the top of tunnel; whether the pool is | | | | |

| |located away from the axial line of tunnel in case the covered layer of the | | | | |

| |tunnel is thin and the permeability of water in stratum is strong | | | | |

| |(8) Whether gushing water is treated | | | | |

|V. |(1) Whether working personnel reduce excavation at the roadbed of tunnel | | | | |

|Administrat|approach and the side slope at the entrance of tunnel, take reasonable | | | | |

|ive |excavation method, allocate earthwork properly, and prevent the spoil from | | | | |

|Measures |sliding along slope and damaging the ecological environment. For the sake of| | | | |

|for |convenient construction, the entrance to the tunnel is generally excavated | | | | |

|Ecological |directly to split the slope prior to construction of open cut tunnel. | | | | |

|Protection |Whether working personnel construct the open cut tunnel firstly, then carry | | | | |

| |out excavation by means of small-scale blasting inside the open cut tunnel | | | | |

| |in order to protect the mountain slope at entrance to the tunnel from being | | | | |

| |destroyed, avoid plentiful soil loss as well as instability and sloughing of| | | | |

| |mountain body, etc., and protect the vegetation at entrance to the tunnel. | | | | |

| |(2) Whether supporting treatment is executed in time in case of collapse | | | | |

| |during construction, in order to prevent badly bleeding or crack of the | | | | |

| |earth’s surface at the top of tunnel, and adverse impacts on mountain body | | | | |

| |at the top. | | | | |

|VI. Solid |(1) Whether slag loading equipment can exert high efficiency inside the | | | | |

|Wastes |tunnel excavation section, and its slag loading capacity is suitable for the| | | | |

|Treatment |quantity of earthwork excavated each time and the capacity of transport | | | | |

|Management |vehicle | | | | |

|on | | | | | |

|VII. |(1) Whether the transport road has a simple pavement in case trackless dump | | | | |

|Traffic |truck is adopted for transport in tunnels | | | | |

| |(2) Whether special personnel are dispatched to repair and maintain the | | | | |

| |hauling track or road according to standard requirements, in order to keep | | | | |

| |it flat and unblocked; whether the slags and residual materials at both | | | | |

| |sides of the track or road are cleared off anytime | | | | |

| |(3) Whether transport vehicles have good performance, and are operated | | | | |

| |according to relevant safety management regulations. | | | | |

|VIII. |(1) Whether tunnel construction personnel wear safety helmet and employee’s | | | | |

|Environment|card when accessing worksite, and personnel not related to construction of | | | | |

|al Safety |the tunnel are forbidden to access the construction site | | | | |

|and Health | | | | | |

| |(2) Whether professional safety personnel are dispatched to take charge of | | | | |

| |the safety in construction of tunnel | | | | |

| |(3) Whether there are various safety caution plates at striking positions at| | | | |

| |construction site | | | | |

| |(4) Whether fire fighting apparatuses and materials like fire extinguishers,| | | | |

| |etc. are set up at bunker and living area; whether it is forbidden to use | | | | |

| |open fire at construction site and living area; and whether it is forbidden | | | | |

| |to smoke or make a fire especially in forest zone | | | | |

|Others (specified in detail) |

| |

| |

| |

|Signature of on-site inspector: _________ |

|Signature of the person in charge of environmental supervision: __________ |

|NOTES: ① In “Remark” column, it is available to fill out the problems discovered, to describe the noncompliance, and to bring |

|forward suggestions on rectification and prevention, etc.; |

|② In case the measures are discovered in on-site examination to be disqualified or have some points to be improved, the |

|environmental supervisor shall issue the “Environmental Rectification Notice” to contractor immediately, and record the serial |

|number of the “Environmental Rectification Notice” in remark column. The contractor’s rectification shall be recorded in detail |

|separately. |

Map 1 Location Map

[pic]

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E4011 V5 rev

Horizontal line

Vertical line

Circular line

Connecting line

Legend

Scale: 1:200000

Tunnel Subproject Site

Schematic Map of Dexing Highway Network Planning

“Three Vertical, Three Horizontal, One Circular, and Six Connecting Lines”

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