摘要
针对花岗岩残积土地区削坡建房引发的地质灾害,研究降雨条件下不同削坡坡度对边坡稳定性的影响。选取梅州典型边坡案例,采用大型岩土数值分析软件SEEP/W进行地下水流动稳态分析,在此基础上再进行持续降雨条件下瞬态分析,获得孔隙水压力导入SLOPE/W模块计算稳定性系数。得出降雨和削坡综合影响使得边坡稳定性急剧下降,在持续72 h暴雨条件下,建议梅州花岗岩残积土地区坡高为12 m的边坡削坡值不超过65°,为探讨边坡灾害防治提供了一定的理论依据。
In view of the geological disasters caused by the construction of houses in granite residual soil areas,the effects of different slopes on the slope stability under rainfall conditions are studied. The typical slope case of Meizhou was selected. The large-scale geotechnical numerical analysis software SEEP/W was used to analyze the steady state of groundwater flow,and then the transient analysis under continuous rainfall conditions was carried out to obtain the calculated stability coefficient of pore water pressure into SLOPE/W module. It is concluded that the comprehensive effect of rainfall and slope cutting makes the slope stability decrease sharply. Under the condition of continuous rain for 72 h,it is recommended that the slope of the slope with a slope height of 12 m in the Meizhou granite residual soil area should not exceed 65°,in order to discuss the prevention and control of slope disasters. Provide a certain theoretical basis.
作者
曾洲
郑志文
张伟
Zeng Zhou;Zheng Zhiwen;Zhang Wei(School of Civil and Transportation,South China University of Technology,Guangzhou 510641,China;Guangdong Geological Environment Monitoring Station,Guangzhou 510510,China)
出处
《山西建筑》
2019年第13期45-46,共2页
Shanxi Architecture
基金
广东省国土资源厅科技项目(编号:GDGTKJ2018004)
关键词
削坡角度
降雨
边坡稳定性
angle of slope cutting
rainfall
slope stability
