Optimal Study of Reinforcement on a Karst Slope of Shui-Nan Highway

Abstract

There have potential main-landslide and a undisturbed thin layer of siliceous rock under the left of Karst slope (K133+180), so it is easy to occur creeping slip surface because of gravity while excavating. Proceeding with geomechanics model and according to influence of heavy rainfall, two schemes proposed are analyzed by means of numerical simulation. Both the reinforcement with lattice beam and anchor cable and the reinforcement with anti-slide pile and cable satisfy stability of slope. But the second scheme has higher safety storage coefficient. And the result that the second scheme not only strength anti-shear ability but also change magnitude and trend of shear damage of potential landslide in slope is rewarded. So the restrain effect of the second scheme is better that of the first. According to engineering cost of two schemes, the cost of the reinforcement with anti-slide pile and cable is less than that of the reinforcement with lattice beam and anchor cable. So Karst slope (K133+180) is reinforced with the second scheme and it is stability undergoing strong rainfall. Experience of Karst slope (K133+180) can give useful guidance for similar projects in Karst terrain.