冲孔灌注桩桩端后注浆技术在龙岩市某工程的应用

The application of bored pile post grouting technology in an project in Longyan city

在裂隙发育的强风化岩层后注浆机理主要是渗透注浆。通过桩端后注浆可大幅提高单桩承载力,其中注浆量是影响后注浆质量和提高单桩竖向承载力的关键因素。本文根据龙岩市某工程冲孔灌注桩采用桩底后注浆技术提高单桩竖向承载力的工程实例,介绍了桩底后注浆的技术。

The main mechanism of base post - grouting in the strongly weathered rock of developing fissures is permeation grouting. The vertical bearing capacity of a single pile can be greatly improved by using base post - grouting, and the grouting quantity is the key factor which affect the grouting quality and improvement of the vertical bearing capacity of a single pile. The technology of base post - grouting is described based on the project of improvement of the vertical bearing capacity of a single pile by using base post - grouting in Longyan city.