高速公路互通匝道滑坡分析与治理对策

Mitigation of a Slope Failure at a Connection Ramp of an Expressway

高速公路互通匝道通常曲线半径较小,且多切割山体坡脚,为边坡滑坡等地质灾害埋下安全隐患。以龙岩厦蓉高速公路改扩建工程东肖互通F匝道滑坡治理工程为依托,在工程地质分析基础上,阐述了边坡病害变形特征、性质,研究揭示边坡滑坡病害成因,针对性提出刷方卸载、抗滑桩支挡、坡脚挡墙固脚及排水等相结合的工程措施,并通过数值仿真和现场监测验证了所采取工程治理措施的有效性,相关研究可为类似互通区边坡滑坡病害整治提供借鉴。

The highway connection ramps usually have a small curvature and often cut into the toe of slope in the mountain areas.The slope toe cutting usually induces to potential geotechnical hazards such as slope failures.This paper presents a case history of mitigating the slope failure at Dongxiao Ramp F of Longyan-Xiamen Expressway Widening Project.The slope failure characteristics and hazards are discussed in the paper.Mitigation methods such as,unloading,drilled caisson for sliding control,retaining structure and improving drainage are also proposed.The simulated values were also compared with the construction measured values and the comparative results are satisfactory.