基于物理模拟试验的岩质滑坡地表位移分析

发布时间：2018-04-15 16:02

本文选题：岩质滑坡 + 三段式滑坡　；参考：《水文地质工程地质》2017年04期

【摘要】：三段式岩质滑坡是一种典型的斜坡变形破坏模式,运用二维地质力学加载系统对其变形破坏全过程进行物理模拟试验研究,采用激光位移计对坡顶和坡脚位置进行位移监测。结果表明:位移监测曲线总体上表现为锁固段经历长时间的能量积累与应力调整后的突发脆性破坏;由于软弱夹层具有蠕滑特性,前缘蠕滑阶段呈现出与土质滑坡相似的初始变形→等速变形→加速变形特征;后缘拉裂阶段作为最短暂的变形阶段,其位移监测曲线表现为"减-增-减-增"的"W"型变化趋势;锁固段是三段式岩质边坡维持稳定的关键所在,其受剪变形的顺序为先上后下,损伤变形由端部向中部递进,最终锁固段剪断形成突发脆性破坏,滑坡高速启动。
[Abstract]:Three-section rock landslide is a typical slope deformation and failure mode. The whole process of deformation and failure is studied by physical simulation experiment with two-dimensional geomechanical loading system, and the displacement of top and foot is monitored by laser displacement meter.The results show that the displacement monitoring curve is generally characterized by sudden brittle failure after long time energy accumulation and stress adjustment in the locking section, and because of the creep characteristics of the weak intercalation.The initial deformation and isokinetic deformation are similar to those of the soil landslide, while the post-edge tensile fracture stage is the most transient deformation stage.The displacement monitoring curve shows a "W" trend of "reduction-increment, less-increase", and the locking section is the key to maintain stability of the three-section rock slope. The order of shear deformation is first, then down, and the damage deformation is progressive from the end to the middle, and the displacement monitoring curve shows a trend of "W" type, and the locking section is the key to maintain the stability of the three-section rock slope.Finally, the locking section shearing formed a sudden brittle failure, and the landslide started at high speed.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：国家自然科学基金项目(41130745、41521002、41272330) 国家重点基础研究发展计划(973)项目(2013CB733202)
【分类号】：P642.22

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