陡倾层状岩石路堑边坡的变形机制及其安全防护

Deformation Mechanism and Safety Protection for Steep Stratified Rock Cutting Slope

陡倾层状岩体在单斜软弱层型垭口的演化过程中表现出较复杂的变形行为 ,其变形结果与人工开挖所形成二次边界条件的关系 ,决定了路堑边坡的地质模式和稳定程度。笔者运用过程机制分析法 ,明确了石灰岩山区某陡倾层状岩石路堑边坡 ,在开挖中产生的变形破坏是由于斜坡长期的滑移 -弯曲或弯曲 -拉裂等重力变形改造的结果 ,并根据边坡的地质力学模式进行了稳定性评价 ,同时提出了相应的安全防护措施。

Sub vertical and stratified rock has occurred some complicated deformation behavior during the evolutionary process of the pass of monoclinic and weak rock stratification. These deformations and forms of excavation affect the geo mechanical mode and stability of the cut slope. Based on the method of process mechanism analysis, the geo mechanical mechanism and process of deformation and failure of this kind slope in limestone mountainous area are illustrated, and the excavation effect and final stability of the slope are studied. According to the failure mechanism, a typical reinforcement remedial design of the slope is proposed.