摘要
采用有限元软件Midas/GTS建立模型,选择强度折减法(SRM)对边坡的支护措施锚杆进行了研究,对不同锚杆长度(9~12 m)和角度(25°、28°、30°)的锚杆支护方案等进行了12种工况的模拟计算,得出了锚杆长度和角度对边坡安全稳定性和位移的影响规律。随着锚杆长度的增加,边坡安全稳定系数逐渐提高;锚杆的角度变化不是边坡安全稳定系数的敏感因素;通过对比分析了锚杆长度的变化情况对边坡位移的影响规律,发现边坡位移的变化与锚杆长度的变化敏感性不强;在考虑经济性的原则下,综合比较选择了锚杆长度为10 m,30°的方案为推荐方案。
The finite element software Midas/GTS is used to establish the model,and the strength reduction method(SRM)is selected to study the support measures of the slope.The bolt support schemes with different bolt lengths(9~12 m)and angles(25°,28°and 30°)are simulated and calculated under 12 working conditions,and the influence law of bolt length and angle on the safety,stability and displacement of the slope is obtained.With the increase of bolt length,the safety and stability coefficient of slope increases gradually.The angle change of anchor rod is not a sensitive factor of slope safety and stability coefficient.By comparing and analyzing the influence law of the change of bolt length on slope displacement,it is found that the sensitivity between the change of slope displacement and the change of bolt length is not strong.Considering the principle of economy,the scheme with bolt length of 10 m and 30°is selected as the recommended scheme.
作者
瞿瑞鹏
QU Ruipeng(Shanxi Jinda Traffic Construction Project Supervision Co.,Ltd.,Shanxi Taiyuan 030012 China)
关键词
参数优化
支护参数
边坡稳定
高边坡
parameter optimization
support parameters
slope stability
high slope
