Post-grouting failure treatment method and device for pile ends

Abstract

The invention discloses a pile tip post-grouting failure handling method and device. The method comprises the following steps of S1, drilling a hole in a set position away from a pile to enable the depth of the bottom of the drilled hole to be greater than that of the bottom of the pile; S2, forming a grouting hole or installing a grouting device at the bottom of a grouting pipe and wrapping an anti-blocking part on the outer side of the grouting hole or the grouting device; S3, putting the grouting pipe and a plugging pipe into the drilled hole in a spaced mode; S4, conducting grouting and plugging on the plugging pipe to form a plugging layer; and S5, conducting grouting on the grouting pipe. The pile tip post-grouting failure handling method is applicable to the problem of post-groutingfailure caused in various types of stratums and various types of working conditions and belongs to a universal solution. The problems that the perpendicularity of a hole is hard to control when the hole is drilled in concrete and grouting cannot be conducted through an acoustic pipe are avoided. The method can also be used as the post-grouting measures for solving the problem that the grouting pipe cannot be embedded in a pile.

Description

technical field [0001] The invention relates to the technical field of pile foundation engineering, in particular to a post-grouting failure treatment method and device for pile ends. Background technique [0002] Post-grouting at the tip of cast-in-situ piles can significantly increase the bearing capacity of the pile foundation. In the general process of post-grouting at the pile end, the grouting pipe is put into the borehole of the pile together with the steel cage, and after the concrete is poured, the grout is driven in through the pre-embedded grouting pipe. In actual construction, it is unavoidable that some grouting pipes will be broken, blocked, etc., resulting in the impossibility of post-grouting, which greatly affects the bearing capacity of the pile and brings safety hazards to the building. [0003] In addition, the effect of post-grouting on the bearing capacity of pile foundations is often carried out through bearing capacity tests. If it is found that the ...

AI Technical Summary

Problems solved by technology

However, it is difficult to drill holes in concrete, and when the pile length is long, it is difficult to control the verticality, and it is impossible to carry out simple, quick and effective remedial measures

[0007] To sum up, there is currently no simple and effective way to deal with problems such as broken grouting pipes, blocked pipes, and poor grouting after pile ends, which seriously affect the safety of pile-based buildings

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