京沪高速铁路桩端注浆群桩基础数值模拟研究

摘要

The previous studies on pile foundation post-grouting technology are mainly limited to single pile.However, group pile is the major structure of pile foundation in engineering at present, which is designed based on deformation control.According to computer simulation static test of group pile foundation in BeijingShanghai high-speed railway post-grouting test section under normal state, the load-settlement law is studied using FLAC3D finite difference software.It is verified the effect of pile tip grouting on reduction of group pile foundation settlement within design load.%以往对于桩基后注浆技术的研究大多局限于单桩,而目前各类工程中桩基础的结构形式是群桩所占比重大,在设计上都以变形控制为主.使用FLAC<'3D>有限差分软件,针对京沪高速铁路桩基后注浆试验段中群桩基础在正常使用状态下的计算机模拟静栽试验,研究其荷载-沉降规律,验证在设计荷载作用范围内,群桩桩端注浆减小群桩基础沉降量的效果.