山区陡坡高填路基变形及稳定性研究  

Study on Deformation and Stability of Steep High-fill Subgrade in Mountainous Area

作　　者：邹伟 黄亚飞 杨壮 周军 张留俊[2,3] ZOU Wei;HUANG Yafei;YANG Zhuang;ZHOU Jun;ZHANG Liujun(China Railway 11st Bureau Group No.2 Engineering Co.,Ltd.,Shiyan 442000,Hubei,China;CCCC First Highway Consultants Co.,Ltd.,Xi'an 710065,China;Chang'an University,Xi'an 710064,China)

机构地区：[1]中铁十一局集团第二工程有限公司,湖北十堰442000 [2]中交第一公路勘察设计研究院有限公司,西安710065 [3]长安大学,西安710064

出　　处：《路基工程》2022年第3期161-166,共6页Subgrade Engineering

摘　　要：依托十堰某高等级公路高填方路基工程,采用数值模拟结合现场监测对三种施工方案的陡坡路基变形及稳定性进行研究。结果表明:陡坡高填路基沉降曲线呈“勺型”,路基各点沉降差异较大,采用开挖台阶和路基内部加铺土工格栅的措施对路基沉降量和沉降规律影响微弱;陡坡路基边坡水平位移先增加后减小,水平位移最大值出现在第二级边坡处,开挖台阶对路基边坡水平位移影响较小,采用路基内部加铺土工格栅的措施不仅有效减少路基边坡水平位移,还可增加路基整体稳定性。Based on the high-filled subgrade project of a high-grade highway in Shiyan,the deformation and stability of the steep subgrade were studied by numerical simulation and field monitoring in three construction schemes.The results show that,the settlement curve of steep high-fill subgrade is of‘spoon-shape’,there exists large settlement difference at various points,and the measures of bench excavation and geogrid laying inside subgrade have weak effect on the amount and the law of subgrade settlement;the horizontal displacement of the steep subgrade slope increases first and then decreases,the maximum value of horizontal displacement occurs at the second bench,and the bench excavation has little effect on the horizontal displacement of subgrade slope,while the measure of geogrid laying inside subgrade can not only reduce the horizontal displacement,but also improve the overall stability of the subgrade.

关 键 词：陡坡高填路基 数值模拟 土工格栅 路基变形 路基稳定性 

分 类 号：U416.1[交通运输工程—道路与铁道工程]