峨边县新声后山不稳定斜坡稳定性分析和治理工程设计  

Stability Analysis and Control Engineering Design of an Unstable Slope in the Xinsheng Back Hill, Ebian County

作　　者：袁磊[1] 吴焕恒[1] 邱恩喜 YUAN Lei;WU Huan-heng;QIU En-xi(Geological Engineering Survey Institute of Sichuan Province,Chengdu 610072;Southwest Petroleum University,Chengdu 610500)

机构地区：[1]四川省地质工程勘察院,成都610072 [2]西南石油大学,成都610500

出　　处：《四川地质学报》2020年第1期112-118,共7页Acta Geologica Sichuan

摘　　要：峨边县新声后山地质灾害点由X1和X2两个不稳定斜坡组成,威胁新声村170户1118人。X1不稳定斜坡滑体、滑床均为崩坡积含块碎石粉质粘土,规模为中型,变形表现为间断性蠕滑,天然工况下为稳定~基本不稳定状态,暴雨等极端工况下为基本基本稳定~不稳定状态。X2不稳定斜坡潜在滑面为基覆界面,规模为中型,变形轻微,以地表房屋开裂为主,天然工况下为稳定状态,暴雨等极端工况下为基本稳定状态。为消除地质灾害隐患,通过勘查手段、工程地质条件、变形特征、变形历史等分析其变形原因及发育特征,通过传递系数法进行了稳定性定量计算,并将计算结果与现场宏观判断进行比较验证。综合分析计算结果与现场施工条件,确定了抗滑桩、挡土墙和接排水沟等措施相结合的综合治理方案。Geohazards in the Xinsheng Back Hill, Embian County are two unstable slopes X1 and X2. The sliding mass of the unstable slope X1 is composed of debris-bearing silty clay with loose soil structure. The potential slip surface of the unstable slope X2 is the bedrock-regolith interface. Affected by the Wenchuan Earthquake and the Lushan Earthquake, the structure of unstable slope become loose. Under the scouring of water current of the Youfang Stream, the front of the unstable slopes is continuously eroded, forming empty steep ridges and making it unstable. The unstable slopes are deformed by the combined action of these factors. Lying in the densely built area, and their deformation seriously threatens people’s lives and property. This paper calculates the stability of the unstable slopes on the basis of study of its material and deformation characteristics. According to engineering geological conditions of the unstable slopes and stability judgment results, a reasonable engineering design is carried out. The comprehensive treatment measures adopted are anti-slide pile, retaining wall and drainage ditch.

关 键 词：不稳定斜坡 暴雨 地震 治理工程 

分 类 号：P694[天文地球—地质学]