Sunken pipe assembling method for making pipeline pass through river

Abstract

The invention discloses a sunken pipe assembling method for making a pipeline pass through a river, and belongs to the technical field of underwater pipeline laying. The method includes the steps that first, pipes are arranged for the pipeline, the assembly procedure includes the pre-assembly process and the pontoon assembly process, the first pre-assembly pipeline and the second pre-assembly pipeline are assembled beside the bank of the river, position point information is marked on the end face of each pre-assembly pipeline, and a first river bed straight pipe segment and a second river bed straight pipe segment are assembled on a platform of a pontoon; second, pipe sinking is performed for the pipeline, the overall pipeline sinking technology is adopted in the pipeline sinking process, a first buoy is tied to a first elbow segment on the pipeline, a second buoy is tied to a second elbow segment, and by controlling a first valve, a second valve, the first buoy and the second buoy always in the center line of a pipe ditch, it is guaranteed that the pipeline accurately sinks into the pipe ditch. With the method, the whole pipeline can be accurately controlled to sink into the assigned pipe ditch, and the control accuracy is high.

Description

technical field [0001] The invention relates to the technical field of laying pipelines underwater, and more specifically, relates to a method for grouping immersed pipes for pipelines crossing rivers. Background technique [0002] During the construction of the natural gas pipeline project, the pipeline crossing the river is the "throat project" in the pipeline construction, which not only has high technical difficulty and high investment, but also has a long construction period and high risk. Pipelines crossing rivers have high requirements on the hydrogeological conditions of rivers, especially for rivers in the following situations, the construction difficulty is more difficult: (1) the river is not navigable, there is no road on both sides, and the river bank is a natural river bank; (2) the river is sandwiched between two Between the mountains, the slopes on both sides are relatively large, the river bed is rocky near the bank, and the middle of the river bed is organi...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the unreasonable deficiencies of the pipe layout and immersed pipe technology in the construction of pipelines crossing rivers in the prior art, and provide a method for grouping immersed pipes for pipes crossing rivers. By adopting the technical scheme of the present invention, it can Accurately control the stable sinking of the entire pipeline into the designated trench, make it seated correctly, and ensure the smooth progress of the construction process

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