某深挖路堑顺层滑坡成因分析及治理措施  

Cause Analysis and Treatment Measures of Deep Cutting Bedding Landslide

作　　者：蒋发森 王思铎 高美奔[2] 熊冰 杨星 JIANG Fasen;WANG Siduo;GAO Meiben;XIONG Bing;YANG Xing(Sichuan Highway Engineering Consult Supervision Company Ltd.,Chengdu 610041,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]四川公路工程咨询监理有限公司,成都610041 [2]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《路基工程》2024年第6期198-204,共7页Subgrade Engineering

基　　金：成都理工大学地质灾害防治与地质环境保护国家重点实验室开放基金项目(SKLJP2022K014)。

摘　　要：某公路深挖路堑顺层边坡开挖至设计标高后发生滑坡,通过现场调查、勘察、室内试验及检测、监测等手段,分析滑坡成因并提出加固治理措施。结果表明:边坡岩体节理裂隙发育、地震损伤、降雨入渗及地下水影响、锚索锚固长度不足等,是引起滑坡的主要因素;滑坡在天然工况、地震工况处于基本稳定状态,在暴雨工况下处于欠稳定状态;根据极限平衡法计算滑坡推力,采用锚索抗滑桩+垫墩锚索+排水的综合治理措施,经治理后滑坡处于稳定状态。Landslide occurs after the deep cutting bedding slope in a highway is excavated to the design elevation.The causes of landslide are analyzed and the measures of strengthening and controlling are put forward by means of field investigation,survey,laboratory test,detection and monitoring,etc.The results show that the main factors of landslide are the development of rock joint and fracture,earthquake damage,rainfall infiltration and groundwater influence,and insufficient anchoring length of anchor cable.The landslide is basically stable under natural condition and earthquake condition,and understable under rainstorm condition.The landslide thrust is calculated according to the limit equilibrium method,and the comprehensive treatment measures of anchor cable anti-slide pile+cushion pier anchor cable+drainage are adopted.The landslide is in a stable state after treatment.

关 键 词：顺层边坡 滑坡 成因分析 锚索抗滑桩 垫墩锚索 

分 类 号：U416.1[交通运输工程—道路与铁道工程]