摘要
为深入探索降雨对滑坡渗流特性及稳定性的影响,选取四川省某滑坡作为研究对象,采用边坡稳定性软件GeoStudio进行分析。基于当地历史降雨资料,共设置大雨、暴雨、大暴雨3个计算工况,对比数值模拟结果与现场实际情况,结果表明:随着降雨强度和持续时间的增加,雨水渗透范围增大,坡体内部渗流场增强,孔隙水压力变化率增加;在连续降雨作用下,边坡表面土体的孔隙水压力最先增大,同一剖面越深的监测点,其孔隙水压力变化率越小;边坡安全系数与降雨持续时间和降雨强度呈反相关关系;大暴雨持续48 h时,该坡体安全系数为1.043,与现场发生蠕滑相吻合。研究成果将为同类型边坡防治工作提供参考依据。
To further explore the impact of rainfall on the seepage characteristics and stability of landslide,a landslide in Sichuan province was selected as the research object,and the slope stability software GeoStudio was used for analysis.Based on the local historical rainfall data,three calculation conditions of heavy rain,torrential rain and rainstorm were set up,and the numerical simulation results were compared with the actual situation on site.The results show that with the increase of rainfall intensity and duration,the range of rainwater infiltration increases.The internal seepage field of the slope is enhanced,and the rate of change in pore water pressure increases;Under continuous rainfall,the pore water pressure of the soil on the slope surface first increases,and the deeper the monitoring point in the same profile,the smaller the rate of change in pore water pressure;The safety factor of slopes is inversely correlated with the duration and intensity of rainfall;When the rainstorm lasts for 48 hours,the safety factor of the slope is 1.043,which is consistent with the occurrence of creep in the field.The research results provide a reference for the prevention and treatment of the same type of slope.
作者
李晨嘉
孙立娟
赵一韩
郜世唯
LI Chen-jia;SUN Li-juan;ZHAO Yi-han;GAO Shi-wei(School of communication science and engineering,Jilin Jianzhu university,Changchun 130118,China;School of civil engineering,Southwest Jiaotong university,Chengdu 610031,China)
出处
《吉林建筑大学学报》
CAS
2024年第5期44-52,共9页
Journal of Jilin Jianzhu University
基金
吉林省教育厅“十四五”科学技术研究项目(JJKH20240372KJ).
