High-pressure jet grouting pile foundation reinforcement construction method: Fid-Bau Portal

High-pressure jet grouting pile foundation reinforcement construction method

CHENG BING / HAN RONGXIANG / ZHENG XU

The invention relates to a high-pressure jet grouting pile foundation reinforcement construction method which comprises the following steps that firstly, a plurality of grout stopping curtain piles are arranged along the boundary of a foundation reinforcement area in a driving mode to form a circle of closed grout stopping curtain, and any two adjacent grout stopping curtain piles are meshed with each other; and secondly, foundation reinforcement high-pressure jet grouting piles are constructed in a foundation reinforcement area defined by the grout stopping curtain. According to the high-pressure jet grouting pile foundation reinforcement construction method, the multiple grout stopping curtain piles are driven at the boundary of the foundation reinforcing area to form a circle of closed grout stopping curtain, and then construction of the foundation reinforcing high-pressure jet grouting piles in the foundation reinforcing area is performed; cement paste can be prevented from flowing away along gaps of gravels or underground water during construction of the foundation reinforcement high-pressure jet grouting pile, so that the reinforcement quality of the high-pressure jet grouting foundation can be ensured; according to the foundation reinforcement construction method, engineering technical risks are reduced, construction is convenient, and the construction cost is low.

本发明涉及一种高压旋喷桩地基加固的施工方法，该施工方法包括如下步骤：步骤一、沿地基加固区域边界处打设若干个止浆帷幕桩形成一圈封闭的止浆帷幕，任意相邻的两个所述止浆帷幕桩之间相互咬合；步骤二、在所述止浆帷幕围设的地基加固区域内进行地基加固高压旋喷桩的施工。本发明提供的高压旋喷桩地基加固的施工方法，通过在地基加固区域的边界处先打设若干止浆帷幕桩形成一圈封闭的止浆帷幕，然后进行地基加固区域的地基加固高压旋喷桩的施工，能够避免地基加固高压旋喷桩施工时水泥浆沿着碎石的缝隙或地下水流走，从而能够保证高压旋喷地基加固质量；该地基加固施工方法降低了工程技术风险，施工方便，施工成本低。

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