Underwater cable duct bank laying structure

Abstract

The invention discloses an underwater cable duct bank laying structure. The underwater cable duct bank laying structure comprises a cable duct bank, leakage drainage equipment, water level monitoring equipment, a drainage pump and a cable well. The cable duct bank is laid along the river bottom, a drainage pipe at the lowest point of the cable duct is connected to a lower leakage water-collecting well, and the bottom of the leakage water-collecting well is connected with a drainage pipe header pipe and the water level monitoring equipment. The drainage pipe header pipe is led into a shoreside cable well along with the cable duct bank to be connected with the drainage pump and is discharged to an external drainage system. The pressure gauge type water level gauge is arranged at the bottom of the leakage water-collecting well to monitor leakage water level to control opening and closing of the drainage pump. According to the water level gauge and the water level gauge power line, the water level gauge power line can be pulled by gravity to complete installation and replacement of the water level gauge. A gap between the end part of the cable duct and the cable is plugged by a caulking structure, and a breather pipe is embedded to ensure the balance of air pressure inside and outside the cable duct. According to the invention, the cable operation environment is improved, the construction period is saved, the safety is guaranteed, and the overall investment increase is less.

Description

technical field [0001] The invention relates to a cable pipe laying structure, in particular to a cable pipe laying structure with a drainage system and a cross-underpassing water system. Background technique [0002] In water conservancy and hydropower projects, the cable pipe laying structure is an indispensable structure. The cable pipe is often buried in the cable channel of the traffic bridge when crossing the water system. When the traffic bridge channel is inconvenient to arrange the cable pipe, the river is often used Bottom or river bottom laying methods, laying construction methods include pipe jacking, dragging pipes and open-cut buried pipes; when water conservancy projects are constructed across water systems, cofferdams are often used to create dry construction conditions, and the construction of open-cut buried pipes in foundation pits is simple and requires less investment. The cost is low, but the vertical direction of the pipeline is usually high on both si...

AI Technical Summary

Problems solved by technology

[0002] In water conservancy and hydropower projects, the cable pipe laying structure is an indispensable structure. The cable pipe is often buried in the cable channel of the traffic bridge when crossing the water system. When the traffic bridge channel is inconvenient to arrange the cable pipe, the river is often used Bottom or river bottom laying methods, laying construction methods include pipe jacking, dragging pipes and open-cut buried pipes; when water conservancy projects are constructed across water systems, cofferdams are often used to create dry construction conditions, and the construction of open-cut buried pipes in foundation pits is simple and requires less investment. The cost is low, but the vertical direction of the pipeline is usually high on both sides of the river and low in the middle. Once water flows into or seeps into the cable tube during construction or operation, it will be difficult to discharge. The long-term soaking of the cable in water will affect the service life of the cable, and it is difficult to repair and replace.

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