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川黔线铁路K119段裁缝岩处发生大型红层岩质滑坡,造成巨大经济损失。为保障既有铁路线运营安全,本文在对滑坡工程地质特征进行调查的基础上采用遥感解译及3DEC数值模拟的手段,讨论了该红层滑坡对铁路工程的影响及其形成演化机理。研究结果表明:(1)在自重应力的牵引作用下,岩层间的非协调变形产生拉张裂缝,降雨入渗张拉裂缝,使滑带泥化软化,并最终诱发裁缝岩滑坡失稳破坏。(2)在滑带处于饱和状态时,该红层滑坡将再次失稳堆积于綦江河上并形成滑坡坝,对铁路工程造成较大威胁。
Chishui-Guizhou Railway K119 section of tailor-made rock at the occurrence of large-scale red rock landslides, resulting in huge economic losses. In order to protect the safety of existing railway lines, based on the investigation of landslide engineering geological features, this paper discusses the influence of the red landslide on railway engineering and the formation and evolution mechanism by means of remote sensing interpretation and 3DEC numerical simulation. The results show that: (1) Under the traction of self-weight stress, the non-coordinated deformation between strata produces tension cracks, and the rainfall infiltration cracks and softens, which eventually induces the destabilization damage of tailings rock landslides. (2) When the sliding belt is saturated, the red landslide will again lose its stability and accumulate on the river and form a landslide dam, posing a greater threat to the railway engineering.