Precast pile partial soil-squeezing pile sinking process

Abstract

The invention discloses a precast pile partial soil-squeezing pile sinking process. The process includes the following steps that (a) pile positions are measured according to a production drawing and are further circled with kaolin for marking; (b) steel tubes are vertically sunken in at the pile positions to a designated depth; (c) the steel tubes with soil are pulled out slowly to form pile holes; (d) bentonite slurry capable of lowering the soil strength is injected into the pile holes; and (e) precast piles are sunken into the pile holes with the soil strength being lowered. According to the precast pile partial soil-squeezing pile sinking process, the bentonite slurry is injected into the pile holes of sunken piles, a series of physical chemistry reactions are carried out with a deep soil layer after permeation, deep layer soil is made more lubricated and fluffy, and the soil-squeezing effect can be effectively reduced; and moreover construction cost is low and construction difficulty is small.

Description

technical field [0001] The invention relates to the technical field of foundation engineering, in particular to a prefabricated pile part [0002] Squeeze soil pile sinking process. Background technique [0003] The pile foundation is a deep foundation composed of several single piles sunk into the soil layer, which can transfer all the weight of the superstructure or structure into the soil layer with larger bearing capacity. Prefabricated piles are a commonly used form of pile foundation. They have the advantages of high bearing capacity, controllable quality, low cost, and fast construction speed. They have been widely used in the field of foundation engineering. The pile sinking process of prefabricated piles is also a process of continuously squeezing the soil. When passing through the hard clay layer or sandy soil layer, strong pile pressure resistance will be generated. Excessive resistance will cause pile jumping or even pile breaking. Therefore, the soil squeezing...

AI Technical Summary

Problems solved by technology

The pile sinking process of prefabricated piles is also a process of continuously squeezing the soil. When passing through the hard clay layer or sandy soil layer, strong pile pressure resistance will be generated. Excessive resistance will cause pile jumping or even pile breaking. Therefore, the soil squeezing effect of prefabricated pile sinking is one of the main factors affecting the construction progress and quality. At present, the measures to improve the soil squeezing effect of the pile sinking process in the project mainly include the gravity release method of water and soil pressure, high-pressure jet vibration method or drilling. However, these methods have disadvantages such as high cost and difficult construction.