重庆市涪陵区厚层软硬相间岩体失稳模式  

ANALYSIS OF CUT ROCK SLOPE FAILURE MODES WITH THICK SOFT-HARD INTER-BEDDINGS IN FULING COUNTY,CHONGQING

作　　者：黄波林[1] 刘广宁[1] 彭轩明[1] 

机构地区：[1]国土资源部宜昌地质矿产研究所,宜昌443003

出　　处：《工程地质学报》2009年第4期516-521,共6页Journal of Engineering Geology

基　　金：中国地质调查局灾害预警项目(1212010640601)

摘　　要：重庆市涪陵区厚层软硬相间公路高边坡的详细调查发现,不同的岩层产状,不同开挖方向其斜坡变形破坏模式不同。本文根据野外实例总结了不同岩层产状与开挖方向对应的破坏模式,平缓层状斜坡破坏方式有滑塌式崩塌、倾倒式崩塌和坠落式崩塌;中倾角层状斜坡破坏方式有顺层滑移和崩塌;高陡倾角层状斜坡坡破坏方式有滑移式崩塌和坠落式崩塌。表明斜坡变形破坏地质力学模式与斜坡岩体结构之间存在着密切的成生联系。通过对不同倾角的斜坡岩体破坏方式研究,可以达到系统评价预测斜坡稳定性的目的;通过公路开挖对不同产状岩层可能造成灾害的预期,可以采用不同的预防措施,避免大型灾害的发生。This paper is based on detailed field survey results about road slopes with thick soft- hard inter- bed- dings. It is found that the rock slopes with different bedding orientations and different excavation orientations would have different failure modes. According to many field examples, the paper summarized several failure modes with different bedding orientations. The modes of rock sliding -falling,toppling and failing. The modes slope failures with gentle bedding dip angles have three types ： with middle bedding dip angles have two types ： sliding and fall- ing. The modes with high dip angle have two types： sliding - falling and falling. On the basis of force analyzing and deforming character analyzing, the paper gives engineering measures respectively. This shows that the slope deform- ation failure and geo -force mode is closely related with slope rockmass structures. Through studying the rockmass failure modes with different dip angles, it can evaluate slope stability systemically. On practicing, it can forecast potential geo -hazards according to different dip angle in cutting slope construction. Consequently, people can adopt suitable measures according to different failure modes.

关 键 词：厚层软硬相间岩体 平缓层状 中倾角层状 高倾角层状 破坏模式 

分 类 号：P642[天文地球—工程地质学]