A Construction Method for Underwater Grooving and Immersed Pipe Crossing the River

Abstract

The invention discloses an underwater grooving and pipe sinking river traversing construction method, and belongs to the field of underwater pipeline laying technologies. The underwater grooving and pipe sinking river traversing construction method includes steps of preparing for construction; arranging pipes of pipelines, performing preliminary assembling procedures and photon assembling procedures in assembling procedures for arranging the pipes of the pipelines, particularly, preliminarily assembling the first pipelines to be preliminarily assembled and the second pipelines to be preliminarily assembled on river banks, marking location point information on the end surfaces of the pipelines, and assembling straight pipe sections of first river beds and straight pipe sections of second river beds on platforms of photons; sinking the pipes of the pipelines, implementing an integral pipeline sinking technology in procedures for sinking the pipes of the pipelines, tying first buoys at first elbow sections on the pipelines, tying second buoys on second elbow sections on the pipelines, and controlling first valves, second valves, the first buoys and the second buoys to always keep the first valves, the second valves, the first buoys and the second buoys on the center lines of pipe trenches so as to guarantee that the pipelines are accurately sunken in the pipe trenches; pouring concrete and stabilizing the pipes; refilling the pipelines and restoring rivers. The underwater grooving and pipe sinking river traversing construction method has the advantage that the integral pipelines can be accurately and stably sunken in the specified pipe trenches under the control of the underwater grooving and pipe sinking river traversing construction method.

Description

technical field [0001] The invention relates to the technical field of laying pipelines underwater, and more specifically relates to a construction method for underwater slotting and immersed pipe 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 b...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the prior art "underwater grooving and immersed pipe construction method" that the pipeline cannot be accurately put into the pipe ditch, and its error is relatively large, and provides an underwater grooving and immersed pipe crossing construction method. The construction method of the river, adopting the technical scheme of the present invention, can accurately control the entire pipeline to sink stably into the designated pipe ditch, make it seated in alignment, and ensure the smooth progress of the construction process

Images