大气影响层含水率变化对下蜀土边坡稳定性的影响分析  

Stability Analysis of Xiashu Soil Slope under the Moisture Content Change of Atmospheric Influence Layer

作　　者：王威[1] 刘顺青[2] 杨正玉[1] 汪兵 吴礼浩 WANG Wei;LIU Shunqing;YANG Zhengyu;WANG Bing;WU Lihao(The 3rd Geological Brigade of Jiangsu Geology&Mineral Exploration Bureau,Zhenjiang,Jiangsu 212001,China;School of Architecture and Civil Engineering,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212005,China)

机构地区：[1]江苏省地质矿产局第三地质大队,江苏镇江212001 [2]江苏科技大学土木工程与建筑学院,江苏镇江212005

出　　处：《河北工程大学学报（自然科学版）》2019年第4期19-24,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金资助项目(51579119);江苏省地质矿产勘查局科研项目(2018KY03);江苏省地质勘查专项资金项目(2018)

摘　　要：针对大气影响层含水率变化对下蜀土边坡稳定性的影响,以镇江跑马山边坡中的下蜀土为试样,通过直剪试验获取了大气影响层现场含水率变化范围内下蜀土的抗剪强度指标,同时结合现场探槽试验获得大气影响深度,采用有限元极限分析软件OPTUM G2分析了大气影响层含水率变化对下蜀土边坡稳定性的影响规律。结果表明:随着大气影响层含水率的增大,下蜀土边坡的潜在滑动面逐渐从深层向浅层转变;下蜀土边坡下、上限安全系数绝对衰减率的最大值都在17%左右。The Xiashu soil slopes in Zhenjiang area collapse in different degrees caused by the moisture content change of atmospheric influence layer.The shear strength parameters under different moisture content of Xiashu soil taken from Zhenjiang Paomashan slope are measured by direct shear test.The atmospheric depth of Xiashu slope is determined by using field grooving test.On the basis of the above,the stability of Xiashu soil slopes considering the influence of water content change is analyzed by using finite element limit analysis software OPTUM.The computing results indicate that the sliding surfaces of Xiashu soil slopes gradually change from the deep layer to shallow layer with the increase of water content.The absolute attenuation rate of lower and upper limit safety factors of Xiashu soil slopes reaches about 17% with the increase of moisture content.

关 键 词：下蜀土边坡 含水率 稳定性 大气影响层 抗剪强度 

分 类 号：TU411.7[建筑科学—岩土工程]