常吉高速沅水沿河段红砂岩边滑坡稳定性分析.pdf

Journalof Engineering Geology 工程地质学报 1004-9665/2008/16(Suppl.)-0579-05 常吉高速沅水沿河段红砂岩边滑坡稳定性分析。金福喜①冯振①卿笃干②张可能①朱自强②(①中南大学地学与环境工程学院长沙410083) (②中南大学信息物理工程学院长沙410083) 摘要通过反分析法和工程经验类比法,研究潜在滑动面抗剪强度,考虑到水对滑动带的软化作用及其抗剪强度的降低。进行稳定性分析计算,并通过剩余下滑力计算确定抗滑措施。依据边坡岩体结构特征、边坡岩层产状几何关系、不良地质现象等因素,将沿线边坡划分为以处治为主的蠕滑区和以监测为主的潜在不稳定区,确保边滑坡治理更加安全、经济和可行。关键词高速公路红砂岩边坡稳定变形监测顺层滑坡 STABILITY ANALYSIS OF SLOPE AND LANDSLIDE oF RED SAND— SToNES INYUANSHUI RIVER AT CHANGJI EXPRESSWAY JIN Fuxi① FENG Zhen① QING Zhugan⑦ ZHANG Keneng① ZHU Ziqiang⑦(①‰z ofGeosciences and Environmental Engineering,Central South University,Changsha 410083) (②schootoflnfo-Physics and Geomatics Engineering,Central South Univers如y,Changsha 410083) Abstract The shearstrength parameters ofpotential slideseam are drawn out by back analysis andexperience shearstrength of slideseam would constantly decline because the water intenerates on further calculationand analysis,rechoose parameters and work out remainder glide—plying withtherulesof safety,economy andfeasibility,according tostructuralcharacter ofrockmass,geometrical nexus ofrockstratum occurrence and unfavorable geological condition,the route of the zone divides intothreesegments whose emphases on treatment ordeformation monitoring. Key words Expressway,Red sandstone,Slope stability,Deformation monitoring,Bedding slip 1 引言广义的红砂岩是由泥岩、砂质泥岩、泥质粉砂岩、泥质细砂岩、泥质砂岩、泥质或砂质页岩等构成的碎屑沉积岩。这些岩石中因