本文以贵州省某特大桥小桩号岸为依托工程。首先采用现场直剪试验,得到小桩号岸软弱夹层钙质页岩的强度参数;再运用块体离散元法建立含结构面的地质模型,模拟各种荷载条件下岸坡的稳定性及力学响应。结果表明:小桩号岸岸坡全部工况的稳定性系数皆达到安全控制标准,且岩体变形均为毫米级别,适宜桥梁建设。 In this paper, a special bridge in Guizhou Province, a small stake on the shore relying on the project. First of all, the strength parameters of calcareous shale with weak sandstone on the small stake were obtained by the direct shear test in the field. Then the geological model with structural plane was established by using the block discrete element method to simulate the stability and mechanics of bank slope under various loading conditions response. The results show that the stability coefficients of all working conditions of small stranded bank slope all reach the safety control standard, and the deformation of the rock mass is in the millimeter level, which is suitable for the bridge construction.