基于强度折减法的路堑高边坡支护方案研究

Comparative analysis of supporting schemes of high cutting slope based on strength reduction method

以某高速公路路堑高边坡为对象,通过建立有限元模型对比分析了顺向高边坡的支护方案下边坡的稳定性,得到了主要结论:卸载下滑段的土体能够有效降低边坡的下滑力,提高顺向高边坡的稳定性;顺向边坡不加设锚杆容易沿岩层分界面出现表层滑动,剪坏坡面喷混凝土,从而造成后期运营的病害;增设锚杆有效地调整了边坡的内力分布,使潜在滑移面的应力减小,滑移面加深加大,增大了边坡的安全系数,提高了边坡的稳定性。

In this paper, taking a highway cutting high slope as the object, using Midas finite element model analyzed the stability of the slope under the support scheme of the high slope. The main conclusions are as follows: unloading the soil in the sliding section can effectively reduce the sliding force of the slope and improve the stability of the high slope. Without bolt along the slope, it is easy to slide along the interface of rock stratum without anchor bolt on the side slope, and spray concrete on the side slope due to shear failure, thus causing the disease of later operation. Adding bolt can effectively adjust the internal force distribution of the slope, reduce the stress of potential slip surface, deepen the slip surface, increase the safety factor of the slope, and improve the stability of the slope.