River management implementation plan

River Management Implementation Plan (1)

1. Project Overview

The Shanghai Chongming North Coast Wind Power Project is located in the northeastern area of ??Chongming County, Shanghai, from Chongming At the Dongwangsha Gate, the west side of the original Shanghai Chongming Dongwangsha Wind Farm is arranged in two rows northwest along the eastern section of Pond 92 and the upper Qingkan in Pond 98, to about 1,300m to the west side of the North Bali Port.

The wind turbines are arranged as follows:

On the east side of Dongwangsha Gate, between the #13 wind turbine built in the existing Chongming expansion project, 1#~2# are arranged along Pond 98 The fans are arranged on the green ridge in the 98 pond, and the distance between the fans is about 580m.

On the west side of Dongwangsha Gate, 1300m to the west side of Beibali Port, 3#~19# fans are arranged along the 98 pond. The fans are arranged on the green ridge inside the 98 pond, and 17 units are arranged. Fans, the distance between fans is about 520~600m.

On the west side of Dongwangsha Gate, 20#~24# fans are arranged along Pond 92, with a total of 5 fans arranged. The distance between the fans is about 520m.

2. Basis for compilation

1. Records of the original appearance of Suitang River Qingkan;

2. Relevant technologies and safety operating specifications;

3. Relevant regulations on river management in Shanghai;

4. Actual conditions at the construction site.

III. On-site construction conditions

Due to insufficient green ridges on the embankment where the wind turbines #3, #4, #5, and #6 are located, they need to occupy part of the river, so the river must be backfilled as shown below. (Take 3# as an example), our project department will clean up the backfill soil according to the original appearance of Suitang River Qingkan.

The original appearance of Qingkan is shown in the following table: Table abbreviated

IV. Construction machinery and labor equipment

1. Construction machinery equipment

< p> One long-arm excavator, one ordinary excavator

One loader, one 20t dump truck, six transportation vehicles 2. Labor force allocation

According to the needs of the site, I bid The section plans to invest 8 laborers, who will be arranged at the cleanup site and the waste dump.

V. Cleaning construction plan

1. Backfill excavation

(1) Before backfill excavation, first determine the clearing and excavation edge lines.

(2) During the backfill excavation construction, the long-arm excavator is used to clean the river channel, and the ordinary excavator is used to transfer and load the silt during the cleaning construction. During the construction process, engineering and technical personnel were arranged to track, supervise, and inspect on-site to promptly control the depth and scope of cleaning to prevent over-excavation disturbance by the excavator.

(3) Due to the high water content of the cleaned sludge, it is easy to cause pollution to the roads and surrounding environment during transportation. Therefore, the sludge needs to be dried before being transported outside after being dug into Qingkan.

(4) During the cleaning process, since the elevation of the river bank cannot be clearly detected, a set of boats and probe rods need to be prepared. After the cleaning is completed in a certain area, the inspection personnel immediately use the probe rods to detect the cleaning depth. , to avoid missed excavation or areas with insufficient excavation depth.

2. Silt transportation

Our project department’s sludge transportation will strictly follow Shanghai’s relevant regulations on sludge transportation, and use vehicles with good performance, well-sealed compartments, and complete certificates. , strictly follow the designated routes. Ensure that the transport vehicles are not overloaded and the upper parts of the carriages are covered with tarpaulins to prevent the scattering of debris during transportation from contaminating urban roads and the surrounding environment.

In order to prevent the dumping and dumping of waste during transportation, our bid section will adopt a two-way signing method between the excavation site and the spoil site during the construction process to resolutely put an end to the chaos of waste. To pour, to throw away.

VI. Safety and quality assurance measures

1. Safety measures

(1) The project department establishes a construction safety leadership group, with the project manager as the team leader and divided leaders Organize, clarify personal responsibilities, and improve the safety protection system.

(2) During operation, a dedicated person shall be assigned to provide unified command and cooperate with each other. The mechanical on-site dispatcher shall provide unified command and cooperate with the mechanical operators.

All construction and operating personnel must undergo safety training and are not allowed to work without a certificate. All operating personnel should be equipped with corresponding safety protection equipment and labor protection supplies. It is strictly prohibited for operators to operate in violation of regulations and managers to give instructions in violation of regulations.

(3) Traffic red lights, traffic signs and full-time guidance personnel should be set up at the construction site to divert pedestrians and vehicles. Obvious placards will be set up at construction crossings, and dedicated personnel will be assigned to guard them to divert traffic.

(4) All kinds of machinery must have dedicated personnel responsible for repair and maintenance, and frequent inspections of key parts of the machinery to prevent mechanical failures and mechanical injuries. Transport vehicles must obey commands, have complete signals, are not allowed to speed, slow down and sound the whistle when crossing intersections or encountering obstacles, and have complete brakes and good functions.

(5) Set up full-time safety officers at the construction site to provide regular safety education to construction workers, improve safety awareness, and hold regular safety meetings once a week.

2. Quality assurance measures

① Before the construction of each process, the construction workers shall make technical, quality and written explanations to the relevant construction teams based on the construction drawings and construction plans. The contents of the explanations include : Operating methods, operating points and quality standards, etc.

② Strictly implement the self-inspection system, and inspectors will promptly inspect the completed work surface to avoid repeated construction.

③After the construction is completed and the self-inspection is passed, the inspection and handover can be submitted to the supervision engineer and relevant superior departments.

5. Environmental protection and civilized construction measures

① Strictly implement relevant regulations on "civilized construction" by relevant national ministries and commissions and local construction committees.

② Establish and improve a civilized construction organization and responsibility system, implement the project manager responsibility system and manager responsibility system for the entire construction process and all aspects, and strengthen civilized construction management.

③ The civilized construction team is responsible for sprinkling water and dust on the site and on the road to ensure that there is no dust and no puddles or mud when vehicles pass by.

④ Rent a transport vehicle that meets environmental protection requirements and sign an agreement with it: a. Slow down the vehicle speed when entering the site to prevent dust. b. The carriage cover is tight to prevent spillage or flying of fine particles. c. Rented vehicles must be inspected by the environmental protection department and the construction unit. d. Vehicles are prohibited from bringing mud onto the road.

⑤ Set up a fence on the outside of the newly built road to separate the construction area from social traffic.

River Management Implementation Plan (2)

1. Construction Preparation

1. Construction Measurement Preparation: Yinhao River Cleaning Company will fix the lines before starting construction. Including re-measurement of conductors and center lines, re-measurement and addition of level points, and measurement and drawing of cross-sections. And record and organize it, and send it to Yinhao Company's supervision engineer for verification.

2. Construction investigation and testing: Before construction, conduct a detailed investigation of the geology, hydrology, obstacles, cultural relics and existing pipelines within the construction scope.

3. Site cleanup: Protect all plants and structures required to be retained within the working boundaries of the construction site. Remove and transport construction waste and humus within the construction area. After the site is cleared, pre-fill rolling will be carried out comprehensively to ensure that the density reaches the specified requirements. The ground elevation will be re-measured and submitted to the supervision engineer for review and on-site acceptance. Once the acceptance is passed, the next construction step will be carried out.

2. River cofferdam

In compliance with the relevant regulations on river management, soil cofferdams are not allowed on the river flats. Before the construction of the cofferdam, coordinate with the river management department to check the river cross-section flow and velocity during the cofferdam to prevent the impact of the water flow on the cofferdam body after the river cross-section is compressed and ensure the stability of the cofferdam.

The cofferdam soil is 1~1.5m higher than the current water depth. The slope of the front surface is 1:0.75, and the slope of the back surface is 1:0.5. A steel cage is used for the outer surface of the earth dam. The steel cage is welded with Φ5 smooth round steel bars, with a size of 80×60×40 and stones inside. The steel cages are staggered and stacked. Woven bags are used to store soil on the inside of the earth dam. The underwater parts of the earth dam are sealed with 2×4 staggered soil bags. When they are stacked above the water surface, they are changed to 2×3 staggered soil bags.

When the cofferdam is completed, the filling quality of the cofferdam must be checked in detail. After confirming the stability of the cofferdam body, install a mud pump to pump out the water stored in the cofferdam.

3. River bottom treatment

This project mainly includes clearing the roadbed, excavation and transportation of spoiled earth, dismantling old structures, digging out tree roots, etc.

First pump water and remove silt. The model and quantity of submersible pumps for pumping water can be determined based on the amount of water in the cofferdam. During the construction preparation period, the required water pumps and related equipment must be fully prepared. All silt is removed to the original soil. An excavator with a bucket capacity of 1.2m3 is used for dredging to concentrate the silt. A loader is used in conjunction with an earth-moving truck to transport all the silt. The depth of dredging is determined based on the actual situation on site, but it must be ensured that the silt is removed. The original soil layer is exposed and after the silt is removed, the bottom surface of the pool is leveled to facilitate layered backfilling.

IV. River bottom gravel cushion

For mortar bottoms with stone grouting, the river bottom should be filled with 30cm of natural gravel, and the fill should be compacted in layers. The earthwork backfill is mechanically spread and vibrated. After the river bottom is inspected and accepted, it will be leveled with a bulldozer and rolled twice with a 12-15 ton vibratory roller. The backfill is then spread in layers. The thickness of each layer of soil is 15mm. The wheels overlap each other during rolling to prevent pressure leakage. Since the filling is carried out in sections, the joints of each layer should form a ladder shape. The staggered distance between the upper and lower floors shall not be less than 1m. After each layer of backfill soil is compacted, ring knife sampling should be carried out according to specifications to detect the density (the density requirement is 90% of heavy compaction). The soil return operation process is: remove silt and debris from the bottom of the pool → check the soil quality → lay the soil in layers → roll it in layers → check the compactness.

For river bottoms where prefabricated board protection is installed, coarse and medium sand layer bottom construction is required, and the construction method is the same as above.

5. Grouting and paving with stones inserted in the river bottom

1. Paving with block stones on the main layer

1) Review and measure the design elevation and edge of the base layer before paving The specified deviations are not met and the surface is clean and free of debris.

2) Use manual paving method. The smooth surface of the polygonal surface of the stones is laid upward, and the stones are laid closely together, and the gaps are filled with small gravels. Fill the filling and smooth the surface with flour.

6. Laying of geotextile

Before laying the geotextile, check whether the elevation and slope of the gravel cushion meet the requirements. If there are large edges and corners on the surface, glue them flat first. , to prevent it from puncturing the geotextile. The geotextiles are laid in staggered overlaps, with a side overlap length of 25cm and an end edge of 20cm.

VII. Grit tank construction

For the processing and shaping of steel bars, prepare a steel bar cutting list according to the dimensions and requirements of the drawings and process them according to the requirements. Before the steel bars are processed and formed, they should be straightened and rust-proofed to ensure that the surface of the steel bars is clean.

After the steel bars are formed, the parts, models, and grades used are listed on the tags, and they are classified and stacked neatly. The formed steel bars are generally temporarily stored in the processing plant; during construction, they are transported to the construction site in batches according to the construction plan and the requirements of the construction site. The construction site can only temporarily store a small amount of formed steel bars that are urgently needed for the project.

The steel bars transported to the site must be neatly stacked, signboards must be hung, and the square wood at the bottom should be placed at a distance from the ground.

The on-site binding and installation of steel bars shall be carried out in strict accordance with the dimensions and requirements of the design drawings. Erection bars: Control the spacing between upper and lower steel bars.

Strictly control the protective layer of steel bars, and set cement mortar pads with the same cement and mortar ratio as the concrete being poured between the formwork and the steel bars. The number of pads should not be less than 2 blocks/m2.

When tying the slabs, it is strictly prohibited to step on the tied steel bars. The location and number of joints when installing steel bars comply with national acceptance standards and regulations.

The template is made of wood and film-laminated multi-layer boards, and is supported by 15×15cm square wood.

Carry out blowing work before pouring; moisten it with clean water during construction; when pouring concrete, the construction team strictly controls the dust speed, which shall not exceed 1.0m/h;

Concrete vibration The tamping uses an inserted vibrator rod for vibration. When vibrating, the vibrator rod adopts a straight down rod, and the moving distance is not greater than 1.5 times the radius of action.

8. Masonry mortar

During construction, cement should be stacked separately according to type, label, and date of manufacture, and kept dry. Different types of cement are not allowed to be mixed.

The masonry mortar is mechanically mixed. The mixing time shall not be less than 2 minutes from the completion of the feeding. The mortar can be used as soon as it is mixed. Cement mortar and cement mixed mortar should be used within 3 hours and 4 hours respectively after mixing. Mortar test blocks are randomly sampled at the discharge port of the mixer, and a group of test blocks are sampled and made from the same plate of mortar; the strength of the mortar is maintained according to standards and the age is 28 days.

9. Stone retaining wall

Stone requirements: The stone should be roughly square in shape, with a thickness of not less than 20cm; the length and width should not be less than the thickness, and the top and bottom surfaces should be flat. Before foundation construction, sign boards should be set up on the main axis. Mark the location and elevation of the foundation, walls and axes on the sign board. Before laying the foundation, the laying out dimensions should be checked with a steel ruler. The allowable deviation should comply with the regulations of GB50203-2002.

During masonry construction, set up skin rods, and mark the changes in skin numbers and vertical structure on the skin rods according to the design requirements, block specifications and mortar joint thickness.

Building retaining walls must comply with the following regulations:

1) When the base elevations are different, build them from the bottom up first. When there is no requirement in the design, at the joint between the high and low steps of the foundation, the lower steps must be built with at least 500mm of solid masonry.

2) The height of each layer of blocks should be the same, and they should be leveled once every 0.7 to 1.2m high;

3) The staggered joints of the blocks should be arranged according to regulations, and should be used in the same layer. One ding and one smooth. The width of the mortar joints is 2 to 3cm;

4) When laying filler stones, the mortar joints should be staggered from each other. The horizontal mortar joints should not be larger than 3cm, and the vertical mortar joints should not be larger than 4cm. Some individual gaps are larger and in the mortar Use squeeze grout to fill small stones;

5) There should be no mortar, block debris and debris in expansion joints and settlement joints.

6) The segmented positions of the working sections of masonry projects are located at expansion joints, settlement joints, and openings.

7) The openings, trenches and embedded parts required by the design must be correctly set aside or embedded during masonry construction. For openings with a width exceeding 300m, build them into flat arches or set up lintels.

8) The embedded parts in the masonry are all treated with anti-corrosion.

9) Check the axis and elevation of the masonry. Within the allowable deviation range, the deviation can be corrected on the top surface of the foundation. The elevation deviation is gradually corrected by adjusting the thickness of the upper gray joint. The quality complies with the following requirements:

A. The masonry mortar is fully filled and dense;

B. The joints are even and neat, the joint width meets the requirements, and there must be no falling off or missing hooks; < /p>

C. The layered masonry construction is closely interlocked and there must be no through joints; the settlement seams are smooth and through.

10. Asphalt board settlement joints

Structural construction After completion, the deformation joints are treated uniformly. During the treatment, the grooves of the deformation joints are first hollowed out with a special wire brush, and then blown clean with an air compressor. Then the asphalt board construction is carried out, and finally the surface is plastered with mortar.