高地下水位粉砂土路基沉降数值模拟  

Numerical Simulation for the Settlement of Silty Soil Subgrade in the High Water Level Area

作　　者：赵丽敏[1] 袁玉卿[1] 李伟[2] 郭涛[1] 许海铭[1] 

机构地区：[1]河南大学土木建筑学院,河南开封475004 [2]北京市勘察设计研究院有限公司,北京100038

出　　处：《河南大学学报（自然科学版）》2014年第4期490-494,共5页Journal of Henan University:Natural Science

摘　　要：当路基处于地下水水位较高的区域时,容易受到地下水的毛细上升侵蚀作用.黄泛区粉砂土毛细水对路基稳定性有重要的影响,为此采用GEO-STUDIO软件,对黄泛区毛细水作用下粉砂土路基的变形规律进行了数值模拟.结果表明,地下水位在地表下0.5～2.0m,填土高度为1m,2m,3m,4m,5m,6m时,路基中心点竖向位移分别为5.13～5.63cm,7.47～8.86cm,9.40～10.07cm,11.61～12.26cm,13.97～15.10cm,16.80～18.03cm.填土高度为1～6m,地下水位由地下2.0m升高至0.5m时,路基中心竖向位移增量达5.6%～18.6%.水位上升引起的路基沉降增加效应明显.When subgrade lies in areas with the shallow water table, it was vulnerable to erosion. The stability of subgrade in the Yellow River Flooded area is significantly affected by the capillary water, so law of deformation of silty soil subgrade due to capillary water was studied in this paper referring to numerical simulation with the GEO STUDIO software. Numerical simulation shows that with the subgrade height of 1 m, 2 m, 3 m, 4 m, 5 m and 6 m,the vertical displacement of the core sport of the subgrade are 5.13--5.63 cm, 7.47--8.86 cm, 9.40-- 10.07 era, 11.61--12.26 cm, 13.97--15.10 cm, 16.80--18.03 cm, respectively. With the height of silt low embankment of 1 -- 6 m, when the water level rises from 2 m to 0.5 m, the vertical displacement of the core sport of the subgrade reached 5.6%- 18.6%. The settlement of the subgrade increased with the water level rise notably.

关 键 词：毛细水 路基 粉砂土 沉降 黄泛区 

分 类 号：U416.2[交通运输工程—道路与铁道工程]