真空-堆载联合预压法加固海相深厚软土地基的沉降变形分析

摘要

T he newly accomplished Guangzhou-Zhuhai railway,with an operation speed of 120 km/h,is to meet ClassⅠ railway settlement standard. As such,Zhuhai W est Station applies the vacuum-stack preloading method in the reinforcement of marine thick soft clay foundation,with a total of 4 pilot projects carried out beforehand. T he paper analyzes the ground settlement and the monitoring results of layered settlement collected on site,so as to compare the booster vacuum-stack preloading method and the conventional vacuum-stack preloading method, hopefully the paper may pave the way for the scientific selection of a preloading measure for the project.%新建广珠铁路设计时速为120 km/h，沉降控制按Ⅰ级铁路标准。其中珠海西站工程采用真空-堆载联合预压的加固方式进行海相深厚软土地基处理，先导工程分4个试验区。本文根据先导工程试验区的地表沉降和分层沉降监测结果，对增压式真空-堆载联合预压与常规真空-堆载联合预压下的软土地基沉降变形进行了统计和相关分析，为该工程预压方案选取提供了科学依据。