顺层开挖边坡变形失稳范围发育特征及预测研究  

Prediction on deformation and instability range development characteristics and of cut slopes of bedding rocks

作　　者：卢珍萍 李林燕 穆成林 LU Zhenping;LI Linyan;MU Chenglin(College of Engineering,Sichuan Normal University,Chengdu 610101,China)

机构地区：[1]四川师范大学工学院,四川成都610101

出　　处：《四川建材》2023年第7期54-57,共4页Sichuan Building Materials

基　　金：国家自然科学基金:岩溶区薄层泥化夹层剪切强度弱化微观机理及现场测试新方法(41902296)。

摘　　要：黔西地区大量顺层岩质开挖边坡建设中,由于对变形失稳范围预测存在误差,致使大量支护措施失效或造成严重浪费。通过对研究区内的135个变形破坏边坡调查统计,甄选了开挖坡高(H)、岩层倾角(α)、坡体结构为失稳范围的主要影响因素。采用统计分析、正算类比、推演预测方法归纳分析了变形失稳范围与影响因素之间的规律,建立变形失稳范围的预测模型,提出相关参数建议取值。以开挖场地9处试验性边坡为例,对失稳范围预测模型检验,结果显示预测结果与实际相比误差不大于10%,证明预测模型具有一定的可靠性。There are a large number of bedding rock excavated slopes in the west of Guizhou Province.Due to the error of prediction of deformation and instability range,a large number of supporting measures fail or cause engineering waste.Based on the investigation and statistics of 135 unstable slopes in the study area,three main influencing factors are selected:excavation slope height(H),rock dip angle(α)and slope structure.Furthermore,through classification and induction,the development rules of the factors and the scope of slope instability are elaborated.Finally,the function model of predicting the scope of deformation and instability is established,and the recommended values of relevant parameters are put forward respectively.The nine experimental slopes in the excavation site were inspected as an examples,the prediction model test of the instability range shows that the error between the prediction results and the actual results is less than 10%,which proves that the research results are scientific and accurate.

关 键 词：顺层边坡 变形破坏 失稳范围 预测模型 

分 类 号：TV223.1[水利工程—水工结构工程]