浅层地下水开采对高速铁路路基的影响  

The infl uence of pumping shallow groundwater on the subgrade of high-speed railway tracks

作　　者：黄路炜[1] 肖宏[1] 韩宇刚 陈民子 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《上海国土资源》2014年第4期127-129,133,共4页Shanghai Land & Resources

摘　　要：地下水开采造成的地面沉降会使高速铁路路基产生较大变形,进而影响行车安全。为研究在高速铁路附近开采浅层地下水对路基变形的影响,本文结合土体渗透固结理论,利用有限元软件ABAQUS建立三维流固耦合模型,系统分析不同抽水速度和与抽水井不同距离条件下的路基变形。分析结果表明:抽水速度和抽水井距离对高速铁路路基的变形具有显著影响。当抽水速度一定时,路基的变形随着与抽水井的距离增大而减小;当与抽水井的距离一定时,路基的变形随抽水速度增大而增大。故为减小地下水位下降对路基的影响,应严格禁止在铁路附近增加新的开采井,严格控制在影响范围内开采地下水。Land subsidence induced by groundwater exploitation can cause significant deformation in the subgrade of high-speed railway tracks, and so threaten the safety of train operations. To study the process of subgrade subsidence associated with groundwater exploitation near high-speed railway lines, a 3D lfuid-solid coupling model was created based on the inifltrating solidiifcation theory and using the ifnite element software ABAQUS. Subgrade deformation caused by various pumping rates and distances was analyzed. The results show that pumping output and pumping distance both have a signiifcant inlfuence on the deformation of the subgrade of high-speed railway lines. Under certain pumping output conditions, deformation of the subgrade decreases with an increase in pumping distance; however, at certain pumping distances, subgrade deformation increases with increasing output. Therefore, to control the influence of groundwater exploitation on the subgrade, no new wel s should be developed near the railway, and groundwater exploitation should be strictly limited within the area that affects the track.

关 键 词：地下水开采 路基沉降 高速铁路 数值模拟 

分 类 号：P642.26[天文地球—工程地质学]