1. Floating pipe laying


Float pipe of a certain length shall be laid after the stern pipe of the cutter suction dredger conveying pump. The floating pipe adopts the form of a plastic pontoon-covered steel pipe, and the steel pipes are flexibly connected with 1.5m long rubber pipes. So that the dredge pump body output pipe and the submerged pipe have a good room for movement, the connection between the floating pipe and submerged pipe should ensure the pipeline bending smooth. Due to the influence of water flow, wind and wave, and the impact force during the construction of the floating pipe, the floating pipe should have a fixed device to control the floating pipe swing and smooth lines.


  1. Submerged pipe laying


Before construction, the mud conveying pipeline will be connected to a relatively spacious shore. The assembly of an underwater submersible pipe adopts the “3+1” structure and adopts the type of cross-connection between steel pipe and hose. The purpose is to make the pipeline in the process of mud discharge, not only to ensure the rigidity of the pipeline, but also to increase the flexibility, and to ensure the navigation of the river demand. Rubber gasket is used to seal the steel pipe joint. The sealing property of the pipe must be maintained. After the connection and forming, the submersible tube is towed by a tugboat, which is towed into the water and dragged forward to the planned sinking position. The submersible tube is connected and sealed by a special takeover ship, and the submersible tube is pressurized and tested. After no air leakage or water leakage, it is laid and sunk to the bottom. After the submersible pipe is sunk and released, obvious protective piles and marks shall be set up along the submersible pipe to prevent the passing ships from anchoring or hitting the pipeline in the operating area of the submersible pipe.


  1. Shore pipe laying


The shore pipe is composed of steel pipe, elbow pipe, and rubber pipe, and is connected by rubber gasket and bolt. When laying, manual lifting is used to lay as flat and straight as possible to avoid dead bending.