暴雨-地震耦合作用下某高边坡稳定性研究--以福州市生态产业园工程为例

Stability research of a high slope under rainstorm-earthquake coupling--Take the project of Fuzhou Ecological Industrial Park as an example

针对福州市生态产业园工程边坡稳定性评价问题,利用Geo-Studio软件,对产业园内某典型高边坡在天然工况、暴雨工况、地震工况、暴雨-地震工况的稳定性进行数值模拟分析。结果表明:天然工况下,开挖前后边坡的安全系数分别为1.399和1.244,分别处于稳定和基本稳定状态,可用于指导边坡快速开挖,节约工期;暴雨和地震工况下,开挖后边坡的安全系数分别为1.015(欠稳定)和1.131(基本稳定),可通过长期监测降雨和地震数据预测边坡的稳定状况;在暴雨-地震耦合作用下,开挖后边坡的安全系数仅0.861,处于不稳定状态,建议采用“分级框架锚杆(索)+植草+护脚墙”等支护措施。所得结论,对产业园及类似工程的开发建设具有重要的参考价值。

Aiming at the slope stability evaluation problem of Fuzhou Ecological Industrial Park,Geo-Studio software was used to conduct numerical simulation analysis on the stability of a typical high slope in natural conditions,rainstorm conditions,earthquake conditions and rainstorm-earthquake conditions.The results show that:the safety factors of slope before and after excavation are 1.399 and 1.244 respectively under natural conditions,which are stable and basically stable respectively.This can be used to guide the rapid excavation of slope and save the construction period.Under rainstorm and earthquake conditions,the safety factors of the excavated slope are 1.015(less stable)and 1.131(basically stable),respectively.The slope stability can be predicted by long-term monitoring of rainfall and seismic data.Under the coupling action of rainstorm and earthquake,the safety factor of slope after excavation is only 0.861,which is in an unstable state.It is suggested to adopt support measures such as"graded frame anchor(cable)+grass+foot guard wall".These conclusions have important reference value for the development and construction of industrial parks and similar projects.