Underwater sinking pipe construction method

Abstract

The invention relates to an underwater sinking pipe construction method. The method comprises the following steps: 1) construction preparation and survey setting-out; (2) excavating a foundation trench and pumping sand; 3) steel pipe assembly welding, pressure testing and corrosion prevention; 4) hoisting the river-crossing pipe to enter water; (5) pipe transverse and pipe sinking; 6) closing water and testing pressure of the pipeline; (7) pipe pressing and gravel backfilling; and 8) riverbed leveling and completion acceptance. The construction method has the advantages that the steps are clear, implementation is convenient, underwater pipe sinking method construction is convenient and fast, the requirement for the required construction site area is not high, a pipe sinking construction pipeline is a prefabricated pipeline, the structural quality is good, the construction efficiency is high, construction is safer under the condition of considerable water depth, no special requirement for a construction section exists, and the construction method is particularly suitable for construction of a wide river channel. The underwater sinking pipe construction method is adopted for pipeline river crossing, it is proved in practical application that normal navigation of ships is not affected, construction with complex geological conditions and difficult cofferdam construction can be met, good economic benefits and social benefits are generated, and reference is provided for similar engineering construction.

Description

technical field [0001] The invention relates to the technical field of underwater immersed pipes, in particular to a construction method of underwater immersed pipes. Background technique [0002] Underwater immersed pipe construction is mainly suitable for pipelines crossing rivers and lakes. It is one of the main construction methods for pipelines crossing waters with deep water depth, complex geological conditions, difficult cofferdam construction and navigation requirements. In underwater pipeline construction projects such as inland lake water intake projects, domestic sewage treatment and sewage pipeline projects in coastal areas, the conventional construction methods are grouping and immersing pipes on the water side, or large-scale engineering ships are used to haul them on the shore as a whole. The construction is carried out by means of immersed pipes at the installation location. The former has only one operation point for a pipeline, and the construction period i...

AI Technical Summary

Problems solved by technology

In the underwater pipeline construction projects such as inland lake water intake projects, domestic sewage treatment and sewage pipeline projects in coastal areas, conventional construction methods use side-to-side assembly on the water, edge-immersed pipes, or overall assembly on the shore and use large engineering ships to tow to The construction is carried out in the way of immersed pipe in the installation position. The former has a long construction period because there is only one operation point for one pipeline, and the latter is not suitable for construction operations in inland shallow water areas.

Images