Three-Dimensional Rock Slope Stability Analysis of the Longjiang River Bridge

Stability of the rock slopes of Longjiang River Bridge is analyzed by three-dimensional fast Lagrangian method (FLAC3D) and strength reduction theory. Influence of natural state, water-saturated state, and seismic action on the stability safety factor ( ), deformed zone and critical slip surface of each slope are investigated. The results indicated that the global stability of slope is stable, and the local slip in a smaller range may occur, which can be reinforced appropriately, The safety factor of H2 slope under all condition mentioned above, which can meet the demand of the project. The largest deformation size of the slope was 104m ~ 147m, and the largest depth was 38m ~ 51m.