Mounting method for underwater pipeline of water intake channel of water plant

Abstract

The invention discloses a mounting method for an underwater pipeline of a water intake channel of a water plant. The mounting method comprises the following steps: laying a protective structure at theouter side of a construction area; manufacturing steel floating boxes from steel plates, and assembling the steel floating boxes to form a water working platform; utilizing a working vertical well toconstruct an underwater subsurface tunnel front hole and a tunnel front hole end head water-stop wall, and reserving a Haff joint; adopting an underwater blasting and / or excavating way to perform trench installation of a tube slot, flattening the tube slot after tube slot is accomplished, and tamping the slot bottom; sealing the two ends of a welded water-take pipeline, floating the water-take pipeline to a tube center position, and sinking the water-take pipeline to a specified position; performing fine turning on the water-take pipeline through a manual hoist mounted underwater via a diver,dismounting a bulkhead, utilizing an underwater auxiliary butt-joint device for enabling the water-take pipeline to be in butt-joint and connection to a tunnel inner pipeline, and performing underwater concrete pouring on a butt-joint position; and performing pipeline back-filling and underwater concrete pouring. The mounting method adopts simple construction equipment, is good in environment-friendly effect, and is quick in construction progress.

Description

technical field [0001] The invention relates to a construction method in the field of building construction research, in particular to a method for installing an underwater pipeline in a water intake tunnel of a water plant. Background technique [0002] With the continuous development of my country's engineering construction, tunnel construction technology is becoming more and more mature, and underwater tunnels have developed rapidly at home and abroad in recent years because of their unique advantages. Developed countries started the research and practice of underwater tunnels very early, while China started relatively late, but it is also actively researching and practicing underwater tunnel technology, and has achieved outstanding results. In-depth comparison and analysis of underwater tunnel engineering geological conditions are more complicated, and the requirements for waterproofing, anti-seepage and engineering life under different erosion conditions are very high, ...

AI Technical Summary

Problems solved by technology

[0011] 2) Immersed tube construction technology requires the use of large lifting equipment, the construction process is cumbersome, and has a great impact on the water environment

[0012] 3) For the pipe jacking construction technology, a working well needs to be excavated separately, the overlying soil layer on the pipe needs to be thicker, and the construction period is long

[0013] 4) The construction technology of tunnel excavation method has high requirements for water leakage prevention and thick covering layer, which is not suitable for water intake pipelines with small diameter and short pipelines

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