山区高速公路灰岩质高陡边坡失稳与加固措施分析  

Analysis on Instability and Reinforcement Measures of High and Steep Limestone Slope of Expressway in Mountainous Areas

作　　者：张超 魏松涛[1] 刘彬 李永荃 赵亚伟 ZHANG Chao;WEI Song-tao;LIU Bin;LI Yong-quan;ZHAO Ya-wei(CCCC First Highway Consultants Co.Ltd.,Xi'an 710075,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710075

出　　处：《公路》2023年第7期264-269,共6页Highway

基　　金：新疆生产建设兵团财政科技计划项目,项目编号2022AB019。

摘　　要：以某高速公路沿线灰岩质高陡边坡为研究对象,在沿线灰岩质高陡边坡灾害调查的基础上,结合日常养护资料,对既有高速公路灰岩质高陡边坡失稳机理及加固措施的有效性进行分析。结果表明:灰岩质高陡边坡失稳主要以局部崩塌、落石及岩体沿结构面发生滑移为主,发生大规模滑坡的几率较小;灰岩质高陡边坡失稳机理与工程地质条件、降雨、开挖方式及既有加固措施密切相关,是多方诱发因素综合作用的结果;锚索(杆)、挂网喷射混凝土、坡面嵌补、注浆加固、截排水等都是常见且有效的处治措施,在加固设计时要因地制宜,做好动态设计,考虑多种处治措施综合使用,达到“一次根治,不留后患”的目的。Taking the limestone high and steep slope along an expressway as the research object,based on the survey of the limestone high and steep slope hazards along the expressway,combined with the daily maintenance data,the instability mechanism of the existing limestone high and steep slope and the effectiveness of the reinforcement measures are analyzed.The results show that the instability of high and steep limestone slope is mainly caused by local collapse,rockfall and rock sliding along the structural plane,and the probability of large-scale landslide is small.The instability mechanism of high and steep limestone slope is closely related to the engineering geological conditions,rainfall,excavation methods and existing reinforcement measures,and is the result of multiple inducing factors.Anchorage cable(pole),net hanging and shotcrete,slope inlaying,grouting reinforcement,interception and drainage are common and effective treatment measures.In the strengthening design,it is necessary to adjust measures as per local conditions,dynamic design is necessary so as to consider the comprehensive use of multiple treatment measures and achieve the goal of "solving problem from the root,leaving no future trouble".

关 键 词：灰岩地区 公路边坡 风险评估 失稳 加固措施 

分 类 号：U416.1[交通运输工程—道路与铁道工程]