Method and device for extracting pipe piles

Abstract

The invention belongs to the technical field of pile pulling methods and equipment, and particularly relates to a pile pulling method and device for a tubular pile. The pile pulling method comprises the following steps: an old pile device positioning step of positioning the tubular pile to be pulled, and dropping a main body pole piece to a position, within certain distance from the bottom of thetubular pole, inside the tubular pile; a grouting step of injecting a slurry binder into the tubular pile through a grouting tube between the inner wall of the tubular pile and the main body pole piece, and utilizing the slurry binder to fill and seal a gap between the position, close to the lower end part, of the main body pole piece and the inner wall of the tubular pile; and a pile pulling stepof pulling out the tubular pile through interaction force between the slurry binder and the inner wall of the tubular pile. The pile pulling method for the tubular pile provided by the invention connects the main body pole piece to the tubular pile through micro-expanding cement, directly acts the tubular pile body in the pile pulling process, does not generate influences on a soil body around the pile, and is beneficial for protection of surrounding environment; and the stress area between the pile-pulling pole piece and an old pile is expanded through expanding cement, so that protection onthe pile body during pile pulling is also facilitated.

Description

technical field [0001] The invention belongs to the technical field of pile pulling methods and equipment, and in particular relates to a pipe pile pulling method and device. Background technique [0002] With the continuous advancement of urbanization, urban land use is becoming increasingly tight. Against this background, there are more and more renovation projects in old urban areas and development projects in underground spaces. In these projects, it is inevitable to encounter the problem of dealing with the old pile foundations left over from the original buildings. At present, the main treatment methods for the old pile foundations left on the site are avoidance, reuse and removal. The method of avoidance is only applicable to the situation where there are few pile foundations left on the site and has little impact on the construction of new foundations; The method is only applicable when the durability and bearing capacity of the old foundation meet the requirements ...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this pile extraction equipment is that the pile extraction process is relatively complicated, requiring the cooperation of various equipment, and workers need professional training to master this process; secondly, this process is only applicable to steel pipe piles with a limited scope of application

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