| 铁路沿线局部抽水对路堤安全性的影响 |
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| 引用本文： | 张翼鹏,郭雪岩.铁路沿线局部抽水对路堤安全性的影响[J].铁道建筑,2019(9):81-83,92. |
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| 作者姓名： | 张翼鹏 郭雪岩 |
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| 作者单位： | 中国铁道科学研究院集团有限公司基础设施检测研究所;西南交通大学土木工程学院 |
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| 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。
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| 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 |
Influence of Local Pumping on Safety of Railway Embankment |
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| ZHANG Yipeng,GUO Xueyan.Influence of Local Pumping on Safety of Railway Embankment[J].Railway Engineering,2019(9):81-83,92. |
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| Authors: | ZHANG Yipeng GUO Xueyan |
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| Institution: | (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) |
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| Abstract: | 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. |
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| Keywords: | high speed railway groundwater exploitation embankment settlement PLAXIS 3D numerical calculation small strain model |
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