超高边坡稳定性及支护效果分析

Analysis on Stability and Support Effect of Ultra-High Slope

为研究支护参数变化对超高边坡稳定性的影响,以怀化西编组站超高边坡为研究对象,采用数值分析结合现场实测对不同支护方案下的边坡稳定性进行了研究。研究结果表明,边坡的破坏模式呈圆弧状,潜在滑动面位于9~12级边坡;单一锚固桩支护作用有限,锚固桩的设置应考虑潜在滑动面影响,超高边坡采用锚固桩+锚杆支护较为安全;锚杆间距会影响桩间土的成拱效应,合理的锚杆间距有利于边坡的综合治理。研究结果可为类似工程设计和施工提供参考。

In order to study the influence of changes in support parameters on the stability of ultra-high slopes,taking the ultra-high slope of Huaihua West Station as the research object,numerical analysis and field measurements were used to study the slope stability under different support schemes.The research results show that the failure mode of the slope is arc-shaped,and the potential sliding surface is located on grade 9th to 12th slopes.The support effect of a single anchor pile is limited,and the setting of anchor piles should consider the influence of potential sliding surface.It is safe to use the anchor piles and bolts for ultra-high slopes.The spacing between anchors will affect the arching effect of soil between piles,and a reasonable spacing between anchors is conducive to comprehensive management of slopes.The research results can provide reference for the design and construction of similar projects.