多节理石灰岩质高陡边坡崩塌落石分析  

Analysis on Rockfall of High and Steep Multi-jointed Limestone Slope

作　　者：马俊 郭晓丽 田野 杨烜宇 MA Jun;GUO Xiao-li;TIAN Ye;YANG Xuan-yu(Shanxi Jinjiao Expressway Co.,Lid.,Jincheng,Shanxi 048000,China;Shanxi Transportation Technology Research&Development Co.,Ltd.,Taiyuan,Shanxi 030032,China)

机构地区：[1]山西晋焦高速公司,山西晋城048000 [2]山西省交通科技研发有限公司岩土与地下工程重点实验室,山西太原030032

出　　处：《山西交通科技》2022年第1期38-42,共5页Shanxi Science & Technology of Transportation

摘　　要：受初期成岩作用和后期构造作用影响,灰岩中节理发育,尤其在山区易形成高陡边坡。由于地形地貌条件制约,难以对这些边坡进行接触测量,而三维激光扫描作为一种准确的非接触测量手段,可以较好地解决这个问题。基于此,对太行山南麓灰岩质高陡边坡进行调查,以其中具有代表性的边坡为对象,通过三维激光扫描,构建了边坡三维地质模型,以此为基础,进行了稳定性分析,建立了落石能量与边坡的关系,进行了基于可拓理论的多种影响因素风险分级,基于CAD二次开发了风险分级系统,并依据岩体受力特征和节理发育情况将岩体崩塌分为3类。研究结果对岩质边坡的崩塌评价具有一定的工程指导意义和理论价值。Influenced by the early diagenesis and late tectonism,the limestone joints are developed,especially in mountain area,it is easy to form the high and steep slope which is difficult to be measured with contact because of the limitation of the landform.However,this problem can be solved by the 3D laser scanning,an accurate non-contact measurement method.This paper carries out the investigation of the high and steep limestone slope at southern foot of Taihang Mountain in China,and takes the representative slope as the object to establish the 3D geological model by the 3D laser scanning.On this basis,the stability analysis is carried out,the relationship between rockfall energy and slope is established,and the risk classification of various influencing factors based on extension theory is carried out.The risk classification system is further developed based on CAD,and the rock collapse is divided into three types according to the stress characteristics of rock mass and the joint development.The study results can provide certain engineering guidance and theoretical value for the collapse evaluation of limestone slope.

关 键 词：落石 风险评估 三维激光扫描 多节理 

分 类 号：U416.14[交通运输工程—道路与铁道工程]