Method for breaking underground obstacle pile

Abstract

The invention provides a method for breaking an underground obstacle pile. The method comprises the following steps that a foundation pit is dug, and the foundation pit is dug around the upper end ofthe obstacle pile; a pile head is chiseled away, and the pile head of the obstacle pile is chiseled away; a pile core is broken, the pile core of the obstacle pile is broken, and the pile side wall ofthe obstacle pile is reserved; the pile side wall is broken, and the pile side wall is broken; pile backfilling is carried out, and the pile core is filled; and the foundation pit is backfilled, andthe foundation pit is filled. The method is suitable for tunnel obstacle piles, other pile foundation engineering, municipal engineering and the like. The method has the advantages of an existing manual hole digging pile breaking technology, the defect that a supporting structure is newly added in an existing manual hole digging breaking scheme is overcome, and the breaking engineering amount is reduced; the construction procedures in the prior art are optimized, transverse channel horse head breaking construction is avoided, and the construction risk is reduced; and when the method is appliedto breaking the tunnel obstacle pile, shield tunneling is not affected by breaking the obstacle pile before shield construction, and the requirement for a construction site is low.

Description

technical field [0001] The invention relates to pile foundation engineering, municipal engineering and the like, in particular to a method for removing underground obstacle piles. Background technique [0002] In recent years, with the continuous improvement of urban subway lines and municipal pipe networks, the construction environment of underground engineering projects has become increasingly complex. When the shield tunnel intersects with buildings such as viaducts on the ground, it will inevitably be affected by the pile foundation of the building. At this time, in addition to the need to reinforce existing buildings and structures, it is necessary to deal with pile foundations within the scope of subway construction. There is also the same problem in the removal of obstacle piles such as other pile foundation works and municipal engineering. [0003] At present, there are four commonly used methods of breaking piles in China: 1) Use the cutter head of the shield mach...

AI Technical Summary

Problems solved by technology

However, this method also has obvious defects. It is necessary to add a cross channel and a manually excavated pile with a pile diameter larger than the original pile. , and there is a certain construction risk when constructing the cross passage to break the obstacle pile

Therefore, the economy and safety of the pile breaking method need to be improved

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