第三系粘土岩滑坡机理分析及稳定性评价  

Mechanism Analysis and Stability Evaluation of Tertiary Clay Rock Landslide

作　　者：刘畅 李文伟 李惠贤 Liu Chang;Li Wenwei;Li Huixian(Zhongjiao Tongli Construction Co.,Ltd.,Xi'an 710075,China)

机构地区：[1]中交通力建设股份有限公司,西安市710075

出　　处：《北方交通》2023年第12期43-46,共4页Northern Communications

摘　　要：第三系粘土岩多为半成岩状态,遇水强度大大降低,易形成软弱结构面,从而形成滑坡。以云南某公路滑坡案例为研究对象,综合项目区地形地貌、地层岩性、滑坡特征等分析了滑坡成因,并结合室内试验数据、滑坡状态对滑坡参数进行了反算,最终确定了滑带参数,对滑坡进行了稳定性评价。研究表明:(1)该滑坡是第三系粘土岩地层在集中降雨、路基填方共同作用下发生的;(2)滑坡在正常工况下处于欠稳定状态,具有持续变形并积累应力及可能滑移的特征;在非正常工况条件下,处于不稳定状态,具有释放应力并滑移的特征。The tertiary clay rock is mostly in a semi diagenetic state,which greatly reduces its strength when encountering water and is prone to forming weak structural planes,thereby forming landslides.Taking the case of a landslide on a highway in Yunnan as the research object,the causes of the landslide are analyzed comprehensively based on the terrain,formation lithology,and characteristics of landslide and so on in the project area.In combination with indoor test data and landslide conditions,the back calculation on the landslide parameters is made,and the sliding zone parameters are ultimately determined.The stability of the landslide is evaluated.The research shows that:(1)the landslide occurs in the tertiary clay rock strata under the combined action of concentrated rainfall and roadbed filling;(2)landslides are in an unstable state under normal working conditions,characterized by continuous deformation,accumulated stress and possible sliding;under abnormal working conditions,it is in an unstable state with the characteristic of releasing stress and sliding.

关 键 词：第三系粘土岩 滑坡机理 参数反算 稳定性评价 

分 类 号：U416.163[交通运输工程—道路与铁道工程]