摘要
为了研究顺层岩质边坡的变形破坏特征,预测边坡开挖后的变形趋势,以便于确定边坡开挖和支护参数,在相似原理的基础上,结合贵州织金茶店乡现场实际情况,进行了开挖坡角30°和50°的2组模型试验。试验结果表明:含多层软弱夹层顺层岩质边坡破坏多在边坡中后缘产生拉裂缝,拉裂缝均由上及下、由表及里向坡脚延伸;开挖坡角30°时,边坡破坏集中在4～7 m深处,开挖坡角50°时边坡破坏集中在15～35 m深处。通过对试验数据的拟合分析得到开挖边坡破坏范围的计算公式。
In order to study the deformation and failure characteristics of bedding rock slope,predict the slope deformation trend after excavation,and determine the parameters of slope excavation and support,two sets ofmodel tests with excavation slope angles of 30°and 50°were carried out on the basis of similarity principle and the actual situation of Zhijin Chadian township in Guizhou Province.The test results show that the failure of bedding rock slope withmulti-layer weak intercalation often results in tension cracks at themiddle and rear edges of the slope,tension cracks extend from top to bottom and from surface to inside of slope foot,the failure of the slope concentrates in the depth of 4~7m when the excavation slope angle is 30°,while the failure of the slope concentrates in the depth of 15~35m when the excavation slope angle is 50°.The formula for calculating the failure range of excavation slope was obtained by f itting analysis of the test data.
作者
习朝辉
裴向军
穆成林
阳博
XI Zhaohui;PEI Xiangjun;MU Chenglin;YANG Bo(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu Sichuan 610059,China)
出处
《铁道建筑》
北大核心
2018年第12期100-103,共4页
Railway Engineering
关键词
公路路基
变形破坏特征
模型试验
开挖边坡
软弱夹层
顺层边坡
Highway roadbed
Characteristics of deformation and failure
Model test
Excavation slope
Weak intercalation
Bedding slope
