摘要
高速铁路路基的不均匀沉降是影响高速列车平稳运行的关键因素,而造成路基不均匀沉降的一个重要原因是高速铁路沿线的地下水开采。本文基于PLAXIS 3D对高速铁路沿线抽水井降水导致的路堤沉降进行数值仿真分析。结果表明:抽水后场地的沉降和孔压均呈漏斗状分布;停止抽水后土体发生回弹,回弹后的沉降值形成一条稳定的曲线。路基中部沉降量可作为判断抽水井危险性的指标。
The uneven settlement of high speed railway subgrade is a key factor affecting the smooth operation of high speed trains. One of the main reasons causing uneven settlement of subgrade surface is the groundwater exploitation along railway. This paper established a on PLAXIS 3D numerical simulation mode to analyze the settlement effect caused by precipitation of pumping wells. The results show that the settlement and pore pressure of the site after pumping are funnel-like distribution. After the pumping was stopped,the soil rebounds,and the settlement value returns a stable curve. The settlement of the middle subgrade can be used to judge the risk of the well.
作者
张翼鹏
郭雪岩
ZHANG Yipeng;GUO Xueyan(Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China)
出处
《铁道建筑》
北大核心
2019年第9期81-83,92,共4页
Railway Engineering
关键词
高速铁路
地下水开采
路堤沉降
PLAXIS
3D
数值计算
小应变模型
high speed railway
groundwater exploitation
embankment settlement
PLAXIS 3D
numerical calculation
small strain model
