水力作用下陡倾顺层岩质斜坡的倾倒破坏  

Toppling Failure of Steeply Dipped Bedding Rock Slope under Hydraulic Actions

作　　者：林必挺 袁宝远[1] 邹凯[1] 桂永庆 Lin Biting Yuan Baoyuan Zou Kai Gui Yongqing(School of Earth Science and Engineering, Hohai University, Nanjing, Jiangsu 211100)

机构地区：[1]河海大学地球科学与工程学院,南京211100

出　　处：《中国煤炭地质》2016年第12期55-61,共7页Coal Geology of China

摘　　要：陡倾顺层岩质斜坡的倾倒变形破坏与水力因素密切相关。将陡倾顺层斜坡的岩层概化为受自重及水力作用的悬臂梁。通过建立陡倾顺层岩质斜坡不同阶段水力作用下倾倒变形破坏的力学模型,揭示了陡倾顺层岩质斜坡的倾倒变形破坏过程。通过定量分析滑移面中产生的静水压力及后缘拉裂缝中的充水高度对坡体稳定性的影响,得出坡体稳定性系数及临界充水高度的表达式。结果表明:水力作用产生的倾倒力矩是引起该类斜坡发生倾倒变形与破坏的重要原因,坡体的稳定性系数降低亦是由水力作用引起的,排水是防治该类斜坡倾倒变形破坏的首要措施。The hydraulic actions are of vital importance to steeply dipped bedding rock slope deformation and failure. To think of steeply clipped bedding rock slope as a cantilever beam under dead-weight and hydraulic actions, established a mechanical model for the slope deformation and failure in different phases under hydraulic action and revealed the process. Through quantitative analyses of impacts from gliding plane hydrostatic pressure and water filling height in trailing edge tensional fractures, worked out slope stability coefficient and expression of critical water filling height. The result has shown that the toppling moment from hydraulic actions is the important reason of toppling deformation and failure of this kind slopes; the lowering down of slope stability coefficient is also caused by hydraulic actions. Drainage is the primary measure to prevent and control toppling deformation and failure of this kind slopes.

关 键 词：陡倾顺层岩质斜坡 水力作用 力学模型 倾倒破坏 坡体稳定性 

分 类 号：P642.2[天文地球—工程地质学]