Abstract: 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.

Key words: connection ramps, slope failure hazards, mitigation measures