煤系地层陡坡路基失稳机理及处治方案研究

Research on Instability Mechanism and Treatment Scheme of Steep Slope Subgrade in Coal Measures Strata

文中结合贵州省贵安新区某道路工程,对煤系地层陡坡路基失稳机理进行分析,认为滑带的形成及路基的加载是边坡失稳的主要原因。根据滑坡推力计算结果,采用以抗滑桩支挡为主体,辅以截排水系统、挡墙、浆砌片石护面墙的边坡处治方案。抗滑桩按抵挡住全部下滑力进行设计,通过Geo-Studio软件对抗滑桩的治理效果进行数值模拟,结果显示坡体内部位移最大值由2.0 m降至5.5 cm,稳定性系数由0.97升至1.687。边坡整体处于稳定状态,治理效果良好。

Combined with a road project in Gui′an new area of Guizhou Province,the instability mechanism of steep slope subgrade in coal measures stratais analyzed,and it is concluded that the formation of sliding zone and the loading of subgrade are the main causes of slope instability.According to the landslide thrust calculation results,the slope treatment scheme with anti-slide pile as the principal part,supplemented by interception and drainage system,retaining wall and mortar rubble facing protection wall is adopted.The anti-slide pile is designed to resist all sliding forces,combined with Geo-Studio software,the treatment effect of anti-slide pile is simulated.The result shows that the internal displacement of the slope decreases from 2.0 m to 5.5 cm,and the stability coefficient increases from 0.97 to 1.687.The slope is in a stable state,and the treatment effect is good.