易滑超倾坡水力启动滑移破坏的现场模拟试验  

Site simulation test on easily slip over dip slope bedding-slip failure caused by groundwater pressure

作　　者：马显春[1] 郎少林[1] 谷明成[1] 曹先康[1] 

机构地区：[1]中铁西南科学研究院有限公司,四川成都610031

出　　处：《西安科技大学学报》2013年第1期91-95,共5页Journal of Xi’an University of Science and Technology

基　　金：科研院所技术开发研究专项资金资助(2008EG123205)

摘　　要：易滑超倾坡的稳定性主要取决于地下水对斜坡岩体的水压力。通过易滑超倾坡水力启动滑移破坏的现场模拟试验,验证了在分析地下水作用下的岩质斜坡稳定性时必须考虑潜滑面通水率问题,并验证了易滑超倾坡稳定性的基本力学模型的正确性;同时也证明了滑坡发生时大多是前缘先破坏,在前缘部位出现喷水、冒水等现象。试验结果表明,潜滑体前缘段所受的地下水压力上升到滑坡的启动界值时滑坡即可发生,并提出了可以导致滑坡启动的地下水压力界值作为此类岩质滑坡监测预警的可靠方法。The stability of easily slip over dip slope is mainly affected by groundwater pressures on the slope rock mass. It was simulated on site that the bedding-slip failure test caused by groundwater pressure in easily slip over dip slope. The test verified water through rate at the potential sliding plane, which must consider in rock slope stability analysis of groundwater effect. The correctness of the basic mechanical model of the easily slip over dip slope was verified. It was also tested that the front of land- slide was starting early and had the phenomenon of water seepage or water sprinkling in front of landslide body before landslide occurrence. The test results showed that when the groundwater pressures suffered by potential sliding plane rise to the sliding threshold, the huge landslide occurred. Finally, it was proposed that the reliable methods of monitoring groundwater pressures threshold suffered by the front of potential sliding plane.

关 键 词：易滑超倾坡 顺层滑移破坏 地下水压力 现场模拟试验 

分 类 号：P642.22[天文地球—工程地质学] TV131.2[天文地球—地质矿产勘探]