Pile foundation construction method in narrow space

Abstract

The invention discloses a pile foundation construction method in narrow space. The pile foundation construction method comprises the following steps that step 1, equipment is prepared, specifically, afolding arm crane, a power station, a transfer vehicle, a rotary drilling machine, a soil borrowing device, a sleeve, a reinforcement cage and a guide pipe are provided; step 2, hoisting and transferring are performed, specifically, the folding arm crane is used for hoisting the rotary drilling machine to the transfer vehicle; step 3, walking in position is performed, specifically, the transfer vehicle carries the rotary drilling machine and the folding arm crane pulls the power station to the predetermined position; step 4, leveling is performed, specifically, the rotary drilling machine issubjected to corrected the leveled; step 5, drilling and soil borrowing are performed, specifically, the rotary drilling machine holds and clamps the sleeve for hole drilling and the soil borrowing device is subjected to soil borrowing; step 6, the reinforcement cage is fixed, specifically, the reinforcement cage which is prefabricated in advance is hoisted and lowered and welded section by section until the reinforcement cage reaches the design position and is fixed; step 7, the guide pipe is inserted and subjected to concrete filling; and step 8, the construction is completed, specifically,after concrete pouring, the sleeve and the guide pipe are pulled out. The pile foundation construction method enables the pile foundation construction to be performed in the narrow space.

Description

technical field [0001] The invention relates to a construction method, in particular to a pile foundation construction method in a narrow space. Background technique [0002] With the development of society, the increase of large-scale infrastructure construction and high-rise buildings in China in recent years has led to an increasing number of pile foundation construction projects, and projects with special and complex working conditions are also emerging. Among them, the construction method of full casing and full rotary drilling rig has achieved good results in the construction of pile foundations in various complex geology, but with the construction of large-scale urban subway projects, the construction efficiency of traditional people and simple mechanical underground excavation pile foundations is low. And the risk is high. At the same time, the existing equipment on the market cannot enter the subway cavern for pile foundation construction due to structural dimension...

AI Technical Summary

Problems solved by technology

Among them, the construction method of full casing and full rotary drilling rig has achieved good results in the construction of pile foundations in various complex geology, but with the construction of large-scale urban subway projects, the construction efficiency of traditional people and simple mechanical underground excavation pile foundations is low. And the risk is high. At the same time, the existing equipment on the market cannot enter the subway cavern for pile foundation construction due to structural dimensions and construction space constraints. Therefore, it is particularly important to design a pile foundation construction method in a narrow space.

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