文献类型：期刊文献

中文题名：软弱夹层及降雨入渗影响边坡稳定性研究

英文题名：Study of Slope Stability Induced by Soft Interlayer and Rainfall Infiltration

作者：沙鹏[1];刘冬艳[1];黄永亮[2]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴312000;[2]浙江有色地质环境研究院,浙江绍兴312000

年份：2022

卷号：42

期号：8

起止页码：1

中文期刊名：绍兴文理学院学报

外文期刊名：Journal of Shaoxing University

收录：国家哲学社会科学学术期刊数据库

基金：浙江省基础公益研究计划项目“边坡致滑特征点三维激光扫描自动识别技术及工程应用”(LGF18D020002)资助.

语种：中文

中文关键词：岩质滑坡;软弱夹层;赋存特征;降雨入渗;数值计算

外文关键词：rock landslide;soft interlayer;occurrence characteristic;rainfall infiltration;numerical calculation

中文摘要：采用FLAC^(3D)建立降雨条件下含软弱夹层的岩质边坡数值模型,讨论软弱夹层厚度、粘聚力、内摩擦角及倾角等因素对边坡稳定性的影响规律.结果表明:坡体中最大水平位移始终出现在软弱夹层与坡面相交处.随着软弱夹层厚度的增加,最大水平位移增幅16%.软弱夹层的粘聚力与夹层上方的水平位移呈负相关,与夹层下方的水平位移呈正相关.随软弱夹层倾角的增加,夹层上方水平位移有增大的趋势,而夹层下方的水平位移存在临界角:倾角在5°~10°时,水平位移随倾角增大而减小;倾角在10°~15°时,水平位移随倾角增大而增大.软弱夹层的赋存特征对边坡稳定性影响的敏感程度为:软弱夹层的厚度>倾角>粘聚力>内摩擦角.降雨条件下,孔隙水压增大的顺序为:软弱夹层下部>内部>上部,夹层上部的最大孔隙水压力比下部平均降幅60%.

外文摘要：FLAC^(3D) was used to establish the numerical model of rock slope with weak interlayer.The influence of thickness,cohesion,internal friction angle and inclination angle on slope stability under rainfall conditions was discussed.The results show as follows:with the increase of the thickness of the weak interlayer,the maximum horizontal displacement of the slope is always at the intersection of the weak interlayer and the slope surface,with an increase of approximately 16%.The cohesion of weak interlayer is negatively correlated with the horizontal displacement above the interlayer,and positively correlated with the horizontal displacement below the interlayer.With the increase of dip angle of weak interlayer,the horizontal displacement above the interlayer tends to increase.There is a critical angle for the horizontal displacement under the interlayer:when the inclination angle is between 5°and 10°,the horizontal displacement decreases with the increase of the inclination angle;when between 10°and 15°,the horizontal displacement increases with the increase of the inclination angle.The sensitivity of the occurrence characteristics of weak intercalation to slope stability is as follows:thickness>dip angle>cohesion>internal friction angle.Under rainfall conditions,the order of increase of pore water pressure is as follows:the lower part of weak interlayer>the inner part>the upper part.The maximum pore water pressure in the upper part of the interlayer is 60%lower than that in the lower part.