软岩边坡开挖高度和坡率对边坡稳定性的影响  

Influence of excavation height and slope ratio to soft rock slope stability

作　　者：李良杰 刘旭红 黄生文[2] 陈远志[2] 

机构地区：[1]湖南省浏醴高速公路建设开发有限公司,湖南长沙410329 [2]长沙理工大学岩土工程研究所,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2012年第3期36-42,50,共8页Journal of Changsha University of Science and Technology:Natural Science

基　　金：湖南省交通运输厅科技进步与创新计划资助项目(201038);湖南省浏醴和大浏高速公路建设开发有限公司资助项目

摘　　要：针对随机结构面的变质软岩边坡,依托实体工程,采用离散元通用程序UDEC进行数值分析,对比分析了在不同坡高、不同坡率条件下坡体的水平和垂直位移及安全系数的变化.研究结果表明,开挖坡率对边坡稳定性的影响较开挖高度的影响更大;当总开挖高度<30m,单级边坡开挖高度的变化<20%时,则不必考虑每级边坡开挖高度对边坡稳定性的影响.另外,还讨论了边坡开挖的经济性,为合理的边坡工程施工提供了理论依据.This article focuses a comparative analysis on the changes of horizontal displacement,vertical displacement and safety factor in different soft rock slope heights and ratios,and it makes the numerical analysis using the general program of discrete element method UDEC in random structure surface.The results show that the slope ratio has much more influence on the stability of slope than height.In addition the effect of excavation height to slope stability could not be considered when the total height30 m and the change of each grade excavation height20%.Furthermore the article provides theory basis for reasonable slope construction through discussing the economy of the slope excavation.

关 键 词：坡高 坡率 位移 安全系数 离散元通用程序 

分 类 号：TU457[建筑科学—岩土工程]