降雨入渗条件下陕西省土质边坡稳定性研究  

STUDY ON THE STABILITY OF SOIL SLOPES IN SHAANXI PROVINCE UNDER RAINFALL INFILTRATION CONDITIONS

作　　者：宗绍辉 刘洋 何锦涛 吴浩然 朱路明 ZONG Shaohui;LIU Yang;HE Jintao;WU Haoran;ZHU Luming(School of Urban Planning and Municipal Engineering,Xi'an Polytechnic University,Xi'an 710048,China)

机构地区：[1]西安工程大学城市规划与市政工程学院,西安710048

出　　处：《低温建筑技术》2024年第10期86-89,共4页Low Temperature Architecture Technology

基　　金：陕西省重点研发计划项目(2022SF-085);陕西省油气井及储层渗流与岩石力学重点实验室开放基金项目(WSFRM20200102001)

摘　　要：为探究不同降雨工况对不同类型边坡稳定性的影响,文中使用数值模拟软件建立了基于非饱和渗流理论与Richards方程的边坡稳定性计算模型,通过计算得到不同类型边坡的安全系数。计算结果表明,随着降雨强度的增加,边坡的安全系数减小,边坡失稳所需的降雨历时越短。利用临界降雨强度和降雨历时数据拟合了降雨阈值曲线,并利用研究区的历史滑坡数据验证了曲线的准确性。文中提供了一种土质边坡有效降雨阈值有限元模拟计算方法,研究结果可以为类似降雨型土质边坡失稳破坏的临界降雨阈值研究提供参考。To investigate the impact of different rainfall conditions on the stability of various types of slopes,this study uses numerical simulation software to establish a slope stability calculation model based on unsaturated seep-age theory and the Richards equation,the model calculates the safety factors for different types of slopes.The results show that as rainfall intensity increases,the safety factor of the slope decreases,and the time required for slope fail-ure under rainfall conditions becomes shorter.A rainfall threshold curve was fited using critical rainfall intensity and duration data,the accuracy of the curve was validated using historical landslide data from the study area.The pa-per presents an effective finite element simulation method for determining rainfall thresholds for soil slopes,the find-ings provide valuable reference for studies on critical rainfall thresholds for slope instability and failure under simi-lar rainfall conditions.

关 键 词：土质边坡 数值模拟 降雨阈值 

分 类 号：TU46[建筑科学—结构工程]