高烈度地震区域泡沫轻质土路堤稳定性分析  

Stability Analysis of Foam Lightweight Soil Embankment in High Intensity Seismic Region

作　　者：孔祥武 姜峰林 刘贤旺 KONG Xiangwu;JIANG Fenglin;LIU Xianwang(Guangxi Road and Bridge Engineering Group Co.,Ltd.,Nanning 530011,China;Guangdong Shoucheng Construction Technology Co.,Ltd.,Guangzhou 511403,China;Chang'an University Highway School,Xi'an 710064,China;Guangxi Yuchai Industrial Park Management Committee,Yulin 537000,Guangxi,China)

机构地区：[1]广西路桥工程集团有限公司,南宁530011 [2]广东首城建设科技有限公司,广州511403 [3]长安大学公路学院,西安710064 [4]广西玉柴工业园区管理委员会,广西玉林537000

出　　处：《路基工程》2022年第4期144-149,共6页Subgrade Engineering

基　　金：云南省保山市科技局(20190312362)。

摘　　要：依托云南省昌保高速公路工程,建立有限元数值模型,并进行了静力分析,研究泡沫轻质土陡坡路堤的工后变形、地震荷载下地基-路基接触面的作用机理、位移反应;分析路堤的整体稳定性。结果表明:随着地基-路基接触面(路基基底面)的摩擦系数值增大,路基表面不均匀沉降得到有效抑制和路基临空面的水平位移也相应的减小。另外,在静力与地震激励作用下,陡坡路堤滑动面均经过坡脚处。Relying on the Changning—Baoshan Expressway project in Yunnan,the finite element numerical model was established.The deformation of foam lightweight soil steep slope embankment after construction,the action mechanism of foundation-subgrade contact surface under earthquake load,displacement response were studied,and the overall stability of embankment was analyzed.The results show that static analysis was carried out,as the friction coefficient value of the foundation-subgrade contact surface(subgrade base surface)increases,the uneven settlement of subgrade surface is effectively suppressed and the horizontal displacement of subgrade free surface is correspondingly reduced.In addition,under static and seismic excitation,the sliding surface of steep embankment passes through the foot of slope.

关 键 词：泡沫轻质土 陡坡路堤 地震荷载 接触面 稳定性分析 

分 类 号：U416.12[交通运输工程—道路与铁道工程]