摘要
以某高速公路多级边坡为例,分析多级边坡稳定性问题。采用工程物探与数值模拟相结合的方法进行分析,利用地质雷达物探手段得到边坡内部岩体破碎程度,通过物探结果结合数值反演分析得到边坡极限平衡法计算参数,由数值模拟方法计算边坡的稳定性与地质雷达物探结果进行对比。分析结果表明:根据地质雷达探测结果,四、五、六级台阶的破碎岩体范围不小于15m埋深,根据数值反演分析可知边坡二级及其以上台阶稳定性较差,数值模拟与物探结果相符;采用25mm的螺纹钢筋锚杆进行边坡支护可以较好地约束坡体的塑性应变和位移。
The stability of multi-stage slope of a expressway was analyzed in this paper.The geophysical exploration and numerical simulation was used to analyze the stability of the slope.Rock mass inside the slope was obtained by geological radar.Based on numerical simulation and the geophysical radar data,the parameters of limit equilibrium method were obtained.The numerical simulation method was used to calculate the multi-stage slope stability,and compared the results with the geophysical radar data.The analysis results show that the fractured rock mass of the fourth,fifth,and sixth steps is not less than 15 m buried depth according to the results of geological radar detection.According to the numerical inversion analysis,the stability of the second step and above is poor.The numerical simulation and results of geophysical survey are consistent.The plastic strain and displacement of slope can be restrained well by using 25 mm reinforced steel anchors for slope support.The results can provide a reference for similar projects.
作者
戴维森
Dai Weisen(Shihuang Management Office of Hebei Expressway,Shijiazhuang 050006,China)
出处
《石家庄铁道大学学报（自然科学版）》
2019年第2期51-55,共5页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
关键词
边坡
稳定性
地质雷达
数值分析
slope
stability
geological radar
numerical analysis
