三福高速公路K201滑坡病害的应急工程效果与根治工程对策

三福高速公路尤溪段K201滑坡是在持续暴雨影响下引起前缘老滑坡复活,并牵引扩大发展,形成高速公路路基坡体变形破坏的岩石滑坡;经滑坡后部刷方减载的应急抢险措施有效控制了滑坡变形快速发展的趋势,并通过路面裂缝位移监测评价了应急减载的工程效果;深部位移监测成果确定了滑面的确切位置,监控了滑坡的发展趋势;滑带强度指标的反演分析和滑坡的稳定性计算进一步揭示滑坡经应急减载后虽处于相对稳定状态,但在暴雨期不利工况条件下,仍存在变形恢复和失稳破坏的可能;通过多方案计算比较和论证分析,确定了路肩锚桩加固的根治工程对策,并经过一年的工后坡体深部位移监测证明了该治理方案的合理性和有效性。

Imergency measures and permanent control works for K201 landslide hazard along Sanming-Fuzhou expressway

K201 landslide hazard along Sanming-Fuzhou expressway is a rock landslide which came to being because of the revival of old landslide in the front of landslide area under the influence of rainstorm,and then which expand to the failure of expressway's roadbed nearby.The trend of rapid deformation was slowed down by lash-up reducing load,and the effect of this measure was evaluated by observing the deformation in the road surface.The position of slip surface and the trend of landslide were confirmed through deep displacement monitoring,back analysis and stability calculation opened out that this landslide was in the temporary stability state,and would deteriorate in the times of rainstorm.The final control works using anti-slide piles with pre-stressed anchor cables near the road was adopted by analyzing and comparing many types of projects;finally,the reasonability and the validity were proved by monitoring the landslide's deformation during one year.