白鹿塬西南废弃黄土窑洞边坡破坏机理研究  

Study on Failure Mechanism of Abandoned Loess Cave Slopes in Southwest of Bailu Plateau

作　　者：刘祥 苏生瑞[1] 肖云飞 LIU Xiang;SU Shengrui;XIAO Yunfei(College of Geology Engineering and Surveying,Chang'an University,Shanxi,Xi'an 710000,China;North China Municipal Engineering Design And Research Institute Co.,Ltd,Tianjin 300074,China)

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710000 [2]中国市政工程华北设计研究总院有限公司,天津300074

出　　处：《河北工程大学学报（自然科学版）》2020年第3期91-97,共7页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金面上项目(41672285);甘肃省地下水工程及地热资源重点实验室开放基金资助项目(211826190519)。

摘　　要：以白鹿塬西南长安区四坡村废弃黄土窑洞边坡为研究对象,借助迈达斯(MADIS GTS NX)有限元软件模拟不同窑洞状态下窑洞边坡的应力应变特征,进而揭示废弃黄土窑洞边坡变形破坏机理并提出相应的防治措施。分析总结不同状态窑洞边坡的MADIS数值模拟结果显示,随着窑洞废弃,土体含水量的增加导致土体力学性质降低,局部临空面土体发生失稳掉落,加之降雨影响,土体力学性质进一步降低,窑洞拱形结构遭到破坏,从而引起窑洞所在边坡发生崩塌等整体失稳破坏。The abandoned loess cave slope of Sipo Village,Chang'an District in southwest of Bailu Plateau was taken as the research object in this paper.And the characteristics of stress and strain of the cave slopes under different cave states were simulated with the help of MADIS GTS NX finite element software,thus further revealing the deformation and failure mechanism of the abandoned loess cave slope and put forward corresponding prevention measures.The analysis and summary of the MADIS numerical simulation results of the cave slopes in different states shows:as the cave is abandoned,the increase of the soil moisture content leads to the decrease of the mechanical properties of the soil and the loss of the local free surface soil.Furthermore,with the effect of rainfall,the mechanical properties of the soil are further reduced,and the arch structure of the cave is destroyed,which causes the collapse of the slope where the cave is located and other overall failure.

关 键 词：废弃黄土窑洞 窑洞状态 数值模拟 破坏机理 

分 类 号：TU431[建筑科学—岩土工程]