反倾片岩质边坡破坏模式研究

基于现有反倾边坡变形及稳定性研究成果，结合十白高速公路边坡实况提出三种可能破坏模式，运用FLAC数值模拟软件进行稳定性分析。研究结果表明:反倾片岩质边坡整体稳定较好，但由于片岩结构特性，如不及时防护，可能会引发进一步破坏。潜在破坏模式主要有3类:第一类为沿节理面发生倾倒破坏；第二类为沿节理和层面的组合破坏；第三类为沿外倾结构面破坏。其中第三类破坏模式主要受岩层节理裂隙的贯通深度控制，破坏最先发生在边坡表层，对边坡稳定性影响最大。反倾片岩质边坡的治理重点应放在边坡表面层的防护。

Study on the Failure Mode of Inverted Schist Slop

Based on the results of the research on the deformation and stability of the inverted slope, this paper, combining with the instance of Shiyan-Baihe highway slope condition, puts forward three possible failure modes and applies FLAC software to establish a numerical simulation model to analysis the stability. The results show that, the inverted schist slope is stable as a whole, but it can be destroyed because of the structural characteristics of schist. There are three main types of failure modes:The first type is the dumping failure along the joint surface, the second type is the combined destruction along the joint surface and the layer and the third type is the destruction along the out-dip structural plane. The third type of failure mode has the most impact on slope stability, which is mainly controlled by the penetration depth of the joint surface in the layer and the destruction is the first to be reversed on the surface of the slope. The inverted schist slope should be focus of governance on the protection of the surface layer of the slope and the results can be used as reference for similar slope protection design.