Offshore immersed pipe and underwater installation and construction method of sewage sea area discharge pipe
A construction method and discharge pipe technology, applied in the direction of pipes/pipe joints/fittings, pipe elements, flange connections, etc., can solve the problems of long mileage and difficult paving process, reduce damage, improve construction efficiency, Guarantee the effect of installation quality
Active Publication Date: 2022-04-22
CCCC THIRD HARBOR ENG +2
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Problems solved by technology
The pavement of deep sea sewage pipelines generally has a long mileage, and the paving process is difficult
Method used
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[0041] The present invention will be further described below in conjunction with accompanying drawing.
[0042] see Figure 1 to Figure 8 , the marine immersed pipe and underwater installation and construction method of the sewage sea area discharge pipe of the present invention are used to install successively six sections of 290m long and 2.8m discharge pipes and a discharge head from the sea side to the shore side; the discharge head includes The pipe diameter gradually decreases from the rear 2.8m to the 1.2m diffuser pipe. The length of the diffuser pipe is 94m and it is vertically connected to seven riser pipes with a pipe diameter of 0.8m through tees at intervals. The top of each riser pipe Five duckbill valves are evenly distributed, and the front end of the diffusion pipe is also connected to a flushing pipe with an inclination of 45° and a pipe diameter of 0.8m (see figure 1 ).
[0043] Construction method of the present invention comprises the following steps:
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The invention discloses an offshore immersed pipe for discharge pipes in sewage sea areas and an underwater installation and construction method, which comprises the following steps: step 1, excavating a foundation trench on the seabed along the installation position of the pipeline, and corresponding to the bottom surface of the foundation trench Then excavate a joint installation groove downwards at the docking position of the pipe section; step 2, the large crane and small crane stationed at the position of the immersed pipe hook a section of pipe, and lean the pipe against the positioning pile; step 3 , remove the blind plates blocked at both ends of the pipeline; Step 4, sink the pipeline into the water by the large lifting vessel and the small lifting vessel; Step 5, adjust the loosening speed of the large lifting vessel and the small lifting vessel to make the After the height difference between the two ends of the pipeline is less than a set distance, sink the pipeline onto the cushion of the foundation groove; Step 6, release the hooks between the large lifting boat and the small lifting boat and the pipeline; then proceed to sinking of the next section of pipeline Water entry and installation. The construction method of the invention can safely and securely sink each section of the sea discharge pipeline into the seabed and install it.
Description
technical field [0001] The invention relates to an offshore immersed pipe for a discharge pipe in a sewage sea area and an underwater installation and construction method. Background technique [0002] Sewage bay discharge is a form of sewage discharge in which the sewage discharge outlet is located in the bay and discharged into seawater. The sewage discharge pipeline is an important part of the urban sewage treatment project. In order to improve the sewage disposal capacity of coastal cities, protect marine resources and the environment, promote the sustainable development of the marine economy, and reduce the pollution of sewage to the marine environment, the sewage discharge pipeline is composed of The shallow sea gradually develops into the deep sea. The pavement of deep sea sewage pipelines generally has a long mileage, and the paving process is difficult. The choice of paving technology determines the success or failure of the project construction. [0003] The sea...
Claims
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IPC IPC(8): F16L1/16F16L1/20F16L23/024F16L23/00F16L57/00F16L55/00F16J15/10E02D15/06
CPCF16L1/161F16L1/20F16L1/205F16L23/024F16L23/003F16L57/00F16L55/00F16J15/10E02D15/06
Inventor 唐芳明林四新赖银波薛宏伟何淼鑫林靖伟
Owner CCCC THIRD HARBOR ENG