River course construction scheme

Compile:

Audit:

Ratification:

I. Basis for compilation

1, Xiaoqing River comprehensive treatment project construction drawings;

2. Relevant technologies and safety operation specifications;

3. Relevant regulations on transportation and dumping of dregs in Jinan;

4, the actual situation of the construction site and the construction experience of similar projects in our unit;

5. Time limit: March 5 to June 30, XX.

Second, the project overview

The Xiaoqing River comprehensive treatment project in Jinan starts from Lin Jiaqiao in the east and ends at Xianwen Road in the west, with a total length of 10.8Km. The comprehensive treatment includes river water conservancy project, culvert construction of South-to-North Water Transfer Project, renovation of municipal roads, bridges and pipelines, landscaping and comprehensive construction and development of surrounding areas. The construction scope of the first phase project mainly includes bridge, river expansion, bank wall masonry, earthwork, silt excavation and transportation, earthwork backfilling, Binhe South Road, and rain and sewage works.

The third section of the river project is located in the reach of Guomian No.1 Factory (Wuliudao reach). The pile number of the river is K 17+870 ~ K 19+300, and the river width is designed to be 75m. The design flood control standard is 100 year return period, and the main construction contents are: excavating general earthwork 38599 1m3, discarding earthwork 382693.82m3, excavating silt 130 134m3, C25 cantilever retaining wall 9022m3, ribbed steel bar (HRR). The total construction period is 170 days, and the planned completion time is June 30, 2008.

III. Dredging Construction Scheme

1) Construction method of dredging floating ship

According to the specific situation of Xiaoqing River, after the construction investigation and the demonstration of dredging scheme, I decided to use floating boat for dredging, that is, put the excavation machinery on the floating boat and use the floating boat to excavate and dredge on the water surface.

The construction sequence is from top to bottom along the river, and the specific construction steps are as follows:

1. Mechanical preparation: 1 0m× 1 .5m pontoon bridge1seat (connected by four 5m×5m× 1.5m pontoon bridges), long arm excavator/kloc-0. Firstly, Upright was put into the river in blocks, connected into a whole and fixed on the river bank. After the riverbank wall is broken, straighten the ramp to the pontoon, and 1 long arm excavator and 1 ordinary excavator will float along the ramp. When the excavator floats on the ship, it is necessary to use a crane or excavator to help ensure the stability of the floating ship and avoid the capsizing of one side of the floating ship.

2. River dredging should be carried out from upstream to downstream, first in the middle and then on both sides.

3. During the dredging construction of the pontoon, two excavators are parked at both ends of the pontoon. During dredging construction, the common excavator is used to fix the floating boat and assist the floating boat to move and walk, and the long arm excavator is used for dredging construction.

4. First, carry out silt excavation in the center of the river. The current width of the river course in my bid section is between 35 meters and 50 meters. During construction, the excavator can't dig the silt in the middle of the river to the river bank at one time, so it is necessary to transport the silt in the middle of the river to both sides of the river in two or three times, and then move it from the pontoon bridge to the river bank to dig the silt directly to the river bank.

5. Because of dredging in water, the water content of silt is high, which is easy to cause pollution to roads and surrounding environment during transportation. Therefore, after the sludge is dug into the river bank, it must be dried before being transported abroad.

6. In the process of dredging, because the elevation of the river bank cannot be clearly detected, it is necessary to prepare a boat and a set of probe rods. After the dredging of a certain area is completed, the inspector will immediately use the probe to detect the dredging depth, so as to avoid missing excavation or excavating the area with insufficient depth.

2) muck transportation and spoil ground management

1, sludge transportation

Ⅲ standard muck transportation will be carried out in strict accordance with relevant regulations of Jinan muck transportation. Select vehicles with good performance, well-closed carriages and complete documents, and drive strictly according to the designated route. Ensure that the transport vehicles are not overloaded, and the upper part of the carriage is covered with tarpaulin, so as to avoid the pollution of urban roads and surrounding environment caused by muck scattered during transportation.

In order to prevent the dumping and dumping of muck during transportation, our department will take the way of two-way ticket signing between the excavation site and the spoil ground in the construction process to resolutely put an end to the dumping and dumping of muck.

In order to ensure that vehicle transportation will not cause pollution to the urban environment, cleaning personnel will be arranged in the muck transportation section to clean up the clods and dirt scattered by vehicles at any time, and special personnel will be arranged to conduct inspections.

2. Management of spoil ground

Abandoned earthwork and silt: 382,693m3+030134m3; Abandoned structural foundation pit, earthwork 3 1 158 m3, silt 8,770m3 * * * and waste amount is 552,755m3.

The proposed spoil ground is located in Poxi Village, Daqiao Town, Licheng District, Jinan City. The spoil ground is a low-lying land with an area of about 250,000 square meters and an average spoil height of 2.2 meters, which can accommodate 550,000 cubic meters of earthwork.

The driving route from the construction site to the spoil ground is Xiaoqing River South Road → Xiaoqing River North Road → Lishan Road → Erhuan North Road → Da Qiao Road → Jinan Yellow River Bridge → 104 National Road →308 National Road → Poxi Village Road → Dump.

Transportation distance: The total distance from the midpoint of this bid section to the spoil ground along the driving route is: 19.9 km, passing through the Yellow River Bridge.

In order to cooperate with the management of the spoil ground, an ordinary excavator is arranged in the spoil ground to assist transport vehicles in carrying soil and level the spoil ground. The height of spoil shall be strictly in accordance with the planned height, and it is forbidden to spoil the soil beyond the area and height.

Third, construction machinery and labor.

1, construction machinery and equipment

Four pontoons (5m×5m× 1.5m)

A long-arm excavator

Ordinary excavator three sets

Two loaders

15 20t dump truck

limousine

2. Labor allocation

According to the on-site demand, we plan to invest 25 people in the bid section, which will be arranged at the dredging site and the slag yard respectively.

IV. Safety and Quality Assurance Measures

1, safety measures

(1) The project department shall establish a construction safety leading group, with the project manager as the team leader, with sound leading institutions, clear personal responsibilities and perfect safety protection system.

(2) During the operation, designated persons shall conduct unified command and cooperate with each other, and the mechanical field dispatcher shall conduct unified command and the mechanical workers shall cooperate. All kinds of construction and operation personnel shall receive safety training and shall not work without a license. All kinds of workers should be equipped with corresponding safety protection articles and labor protection articles. Operators are prohibited from operating in violation of regulations, and managers are prohibited from directing in violation of regulations.

(3) Set up traffic lights, traffic signs and full-time guides on the construction site to guide pedestrians and vehicles. Clear placards should be set up at the construction intersection, and special personnel should be assigned to guard and divert traffic.

(4) All kinds of machinery should be maintained by special personnel, and the key parts of the machinery should be regularly checked to prevent mechanical failure and mechanical injury. Transport vehicles should obey the command, complete the signal, do not overspeed, slow down and honk when crossing the fork and encountering obstacles, and have complete brakes and good functions.

⑤ Full-time security officers shall be set up on the construction site to regularly educate the construction personnel on safety, improve safety awareness and hold a safety meeting once a week.

⑥ Check the floating boat and water machinery at any time, and assign special personnel to take care of and direct the construction on the floating boat. If the floating vessel is found to be leaking or damaged, the construction should be stopped immediately and the water machinery should be withdrawn, and the construction can continue only after the danger is relieved.

2, quality assurance measures

(1) Before the construction of each working procedure, the builder shall make technical, quality and written disclosure to the relevant construction teams according to the construction drawings and construction scheme, and the disclosure contents include: operation methods, operation points, quality standards, etc.

(2) Strictly implement the system of self-inspection, and the inspectors shall detect the completed working face in time to avoid repeated construction.

(3) After the construction is completed and the self-inspection is qualified, it shall be inspected and handed over to the supervision engineer and the higher authorities.

Five, environmental protection and civilized construction measures

(1) strictly implement the relevant provisions of the relevant state ministries and local construction committees on "civilized construction".

(2) Establish and improve the civilized construction organization and responsibility system, implement the project manager responsibility system and management personnel responsibility system for the whole process and all-round construction, and strengthen the civilized construction management.

(3) The civilized construction team shall be responsible for sprinkling water on the construction site and roads to prevent dust, puddles and mud when vehicles pass through the roads.

(four) to rent a transport vehicle that meets the requirements of environmental protection and sign an agreement with it;

A enter the site and slow down to prevent dust.

B the roof of the car should be tightly covered to prevent fine particles from scattering or flying.

C rented vehicles must be inspected by the environmental protection department and the construction unit.

D. vehicles are prohibited from taking mud on the road.

⑤ A fence shall be set outside the newly-built road to separate the construction area from social traffic.