Construction Method of Mud Circulation System of Bored Pile in Complicated Geology

Abstract

The invention relates to a construction method of a mud circulation system for bored piles in complex geological conditions. The drill pipe adopts double-layer steel pipes, and the air pipe is built between the double walls of the drill pipe. It does not need to be dismantled after the first hole cleaning, and can be directly used for secondary cleaning. hole, which solves the problem that the traditional technology needs to pull out the drill pipe to install the air pipe when cleaning the hole, which affects the construction progress, and the construction efficiency is greatly improved; Streamlined, with a small outlet and a large inlet, which can increase the flow rate and increase the negative pressure. At the same time, an oblique air inlet is installed at the outlet of the elbow joint and connected to a compressed air pump. A relatively high negative pressure is formed inside, which significantly improves the quality and efficiency of hole cleaning; the invention uses the large-diameter steel pipe piles of the construction platform of the bored piles on the water to make a mud storage container, which solves the problem that there is nowhere to store the construction mud of the bored piles on the water The problem.

Description

technical field [0001] The invention relates to a mud circulation system, in particular to a construction method for a mud circulation system of a complex geological bored pile. Background technique [0002] Many bridge pile foundations are constructed on water. The construction of bored piles on water usually starts with laying steel pipe piles, laying steel plates on the steel pipe piles to make a construction platform, and then carrying out pile foundation construction on the construction platform. Bored piles Drilling construction requires a large amount of mud. The traditional mud circulation system requires multiple mud pools. The mud pools are large in size, scattered in layout, and occupy a large area. Due to the narrow construction work area on the water surface, a large number of mud pools cannot be placed on the construction platform. The mud in the bored pile needs to be circulated and cleaned, while the traditional reverse circulation cleaning of the bored pile ...

AI Technical Summary

Problems solved by technology

[0002] Many bridge pile foundations are constructed on water. The construction of bored piles on water usually starts with laying steel pipe piles, laying steel plates on the steel pipe piles to make a construction platform, and then carrying out pile foundation construction on the construction platform. Bored piles Drilling construction requires a large amount of mud. The traditional mud circulation system requires multiple mud pools. The mud pools are large in size, scattered in layout, and occupy a large area. Due to the narrow construction work area on the water surface, a large number of mud pools cannot be placed on the construction platform.

The mud in the bored pile needs to be circulated and cleaned, while the traditional reverse circulation cleaning of the bored pile is generally used for secondary cleaning. Re-install the hole cleaning system during drilling, which will affect the construction progress

In addition, due to the negative pressure of the slurry discharge pipe and the limited flow rate of the mud in the traditional reverse circulation hole cleaning, the quality and efficiency of the hole cleaning will be affected.

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