Pile bottom sediment ultra-high-pressure replacement slurry spraying structure and construction method thereof

Abstract

The invention discloses a pile bottom sediment ultra-high-pressure replacement slurry spraying structure and a construction method thereof. The structure is characterized in that the bottom of a pouring pile is arranged on a cement soil swelling structure which is formed by slurry spraying and enhances the strength of pile side soil and pile end soil. The construction method of the structure comprises the steps of construction of the pouring pile, drilling and core taking, replacement slurry spraying, core taking grouting and the like. Compared with the prior art, the structure is simple, construction is convenient, the bearing force of the pile is effectively increased, the pouring pile is a rigid pile and is arranged in a flexible rotary stirring pile, no mud is generated in the construction process, the construction cost is further reduced, and the structure is green and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of pile foundation engineering, in particular to an ultra-high pressure replacement spraying grouting structure for pile bottom sediment and a construction method thereof. Background technique [0002] Bored piles are widely used in various construction projects due to their advantages such as wide application range, high single pile bearing capacity, low construction noise, small vibration and low unit price. With the increasing number of high-rise buildings, the requirements for the bearing capacity of pile foundations are also getting higher and higher. Due to the particularity of the construction technology of the bored pile, its bearing capacity is greatly affected by factors in the construction, especially the sediment layer at the bottom of the hole seriously affects the bearing capacity of the pile. Pile bottom sediment refers to the sediment left by the sedimentation or collapse during the drilling...

AI Technical Summary

Problems solved by technology

At present, most of the methods for controlling the sediment at the bottom of the hole are to use the method of "one cleaning" and "two cleaning" to deal with the sediment at the bottom of the hole before pouring concrete. However, there is no good method to control the sediment after pile inspection deal with

[0003] The existing technology is not ideal for the treatment of pile bottom sediment, especially the grouting process cannot be carried out after the pile detection, there are weak points of the pile foundation, which greatly reduces the ultimate bearing capacity of the pile foundation

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