萝卜岗边坡变形破坏机理研究

Research on Deformation and Failure Mechanism of Luobogang Slope

某新县城萝卜岗边坡为缓倾角顺层砂泥岩互层型边坡。在该边坡挡墙基槽施工时发现,边坡岩体深部存在隐蔽的张拉裂缝,而其上覆岩体却仍保持较完整状态的假象等地质现象。以该边坡为研究对象,在现场调查及对边坡岩土体物理力学参数试验、分析取值的基础上,建立了边坡变形破坏的概念模型,通过采用离散元程序对边坡的变形破坏过程的反演分析,深入地揭示了该类边坡的变形破坏机理。

Luobogang Slope in certain new county town is low-angle sand-mud stone bedding slope. During construction of retaining wall trench, the slope is found to have concealed tensile cracks deep in the terrain, while the overlying rock mass appears to be relatively complete. Taking this slope as the study objective and depending on site investigation as well as experiment and analysis for value selection of physical mechanics parameters of rock and soil mass of the slope, the conceptual model of slope deformation and failure is established. Through inverse analysis on the course of deformation and failure with distinct element code, the deformation and failure mechanism of such slope is disclosed deeply.