山地条件下建筑边坡稳定性分析及治理

STABILITY ANALYSIS AND TREATMENT OF BUILDING SLOPE UNDER MOUNTAIN CONDITIONS

某小区建设场地位于山地条件下,房屋建筑分布于坡顶、坡脚等不利位置,其地形复杂且高差悬殊大,边坡稳定性问题亟需解决,根据该地段工程地质条件,对边坡野外露头实测结构面分组,采用赤平投影法对其失稳作出判别,结果表明边坡最可能发生沿结构面滑动破坏和结构面组合切割引起的局部块体破坏。在此基础上,采用边坡稳定分析能量法EMU对具有代表性的计算剖面进行了稳定性分析,结果表明边坡持久工况整体稳定,但在地震+暴雨最不利工况下,5#楼北侧边坡安全系数不满足规范要求。最后,综合边坡稳定分析结果并结合工程实际情况提出了相应的治理方案,可以为类似工程提供参考。

The construction site of a residential area is in the mountainous area,and the buildings are distributed at the top and foot of the slope.Moreover,the terrain with the large height difference is complex,in which the problem of slope stability needs to be solved urgently.According to the engineering geological conditions of the area,the structural planes measured in the field outcrop of the slope are grouped,and the method of stereographic projection is used to distinguish the instability.The results show that the slope is most likely to occur along the structural plane with local block failure caused by sliding failure and combined cutting of structural plane.On this basis,the stability analysis of the representative calculation profile is carried out by using the energy method EMU of slope stability analysis.The results show that the overall stability of the slope is stable under the persistent condition,however,the safety factor of the north side slope of building 5 does not meet the requirements of the code under the most unfavorable condition of earthquake and rainstorm.Finally,the corresponding treatment scheme is proposed combining the analysis results of slope stability and the actual situation of the project,which can provide reference for similar projects.