不同降雨持续时间的组合结构支护边坡稳定性分析  

Stability Analysis of Combined Structure Supporting Slope with Rainfall Duration

作　　者：张秀奇 Zhang Xiuqi(Inner Mongolia Chuole Water Conservancy and Hydropower Co.,Ltd.,Hohhot 010010,Inner Mongolia)

机构地区：[1]内蒙古绰勒水利水电有限责任公司,内蒙古呼和浩特010010

出　　处：《陕西水利》2023年第12期11-13,共3页Shaanxi Water Resources

基　　金：内蒙古自治区高等学校科学研究项目(NJZY2146)。

摘　　要：组合结构在边坡支护工程中应用十分广泛。结合一组合结构支护边坡工程,利用数值模拟的方法,对不同降雨持续时间下,经组合结构支护边坡的各项指标进行分析。结果表明:(1)在持续降雨工况下,坡脚的体积含水率较大,应注意坡面排水以及合适的排水方式;(2)坡脚的孔隙水压力较大,在类似降雨工况下支护边坡时应关注边坡坡脚。(3)经组合结构支护后,边坡的塑性应变与位移明显减小,边坡的稳定安全系数提升显著。未降雨时稳定安全系数提升了40.2%,持续降雨12 h仍能提升28.4%。以上研究成果对类似边坡支护工程具有参考意义。Composite structure is widely used in slope support engineering.Combined with a combined structure supporting slope project,the numerical simulation method is used to analyze the indexes of the combined structure supporting slope under different rainfall duration.The results show that:(1)Under continuous rainfall conditions,the volume water content of slope foot is large,and attention should be paid to slope drainage and appropriate drainage methods;(2)The pore water pressure of slope foot is large,and the side slope foot should be paid attention to when supporting slope under similar rainfall conditions.(3)After the combined structure support,the plastic strain and displacement of the slope are significantly reduced,and the stability safety factor of the slope is significantly increased.When there was no rainfall,the stability safety factor increased by 40.2%,and the continuous rainfall for 12 h could still increase by 28.4%.The above research results have reference significance for similar slope support engineering.

关 键 词：数值模拟 持续降雨 组合支护结构 边坡稳定性 

分 类 号：U416.14[交通运输工程—道路与铁道工程]