旧村泾河黄土滑坡成因机制与稳定性分析  

Genesis Formation Mechanism and Stability Analysis of Jinghe Loess Landslide in Jiucun Village

作　　者：陈风光[1] 胡梦玲[2] 郜可欣 叶家桐 张小龙 CHEN Fengguang;HU Mengling;GAO Kexin;YE Jiatong;ZHANG Xiaolong(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China;School of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056 [2]西安科技大学建筑与土木工程学院,西安710054

出　　处：《路基工程》2022年第4期195-200,共6页Subgrade Engineering

基　　金：国家自然科学基金项目(41702346);陕西省教育厅专项科研计划项目(17JK0502)。

摘　　要：以旧村泾河滑坡为研究对象,通过现场勘察确定滑坡地层岩性与结构特征,分析滑坡成因机理;开展原位直剪试验,分析滑带土的强度特性,预测滑坡稳定性。分析表明:泾河滑坡的滑动机制为前缘施工开挖和降雨入渗引发滑坡前缘局部失稳。前缘新滑坡稳定性差,对拟建高速通行隧道洞口和泾河大桥桥墩稳定性有较大影响,需进行支挡加固,并采取截排水措施。Taking the Jinghe landslide at Jiucun as the research object,the stratigraphic lithology and structural characteristics of the landslide have been determined through field investigation,and the genesis mechanism of the landslide has been analyzed.In-situ direct shear tests have been carried out to analyze the strength characteristics of sliding soil and predict the stability of the landslide.The analysis shows that the sliding mechanism of Jinghe landslide is the local instability of the landslide front caused by the construction and excavation of the landslide front and rainfall infiltration.The instability in the front edge of the landslide has great influence on the stability of the tunnel portal and Jinghe bridge piers planned to be built for highway passage,and reatining reinforcement is needed,and drainage measures are taken.

关 键 词：黄土滑坡 成因机制 滑带土 抗剪强度 稳定性分析 

分 类 号：U416.16[交通运输工程—道路与铁道工程]