基于离心模型试验的武隆鸡尾山滑坡形成机制研究

发布时间：2018-08-29 19:42

【摘要】：采用离心模型试验,查明和重现典型视倾向滑移型滑坡武隆鸡尾山滑坡的形成演化过程。试验模型采用重晶石粉、石英砂、石膏、甘油、水泥和水按一定比例,分别制作包含鸡尾山滑坡模型的基座、岩溶带和滑体的地质力学模型,布设相关仪器设备,按照相关规范运行离心试验。试验成果表明,武隆鸡尾山滑坡前部岩溶带的"易压缩性"为滑源区的蠕滑提供了"准临空面"作用,第二破裂面的形成是武隆鸡尾山滑坡失稳的前提,离心模型试验重现了武隆鸡尾山滑坡"蠕滑→拉裂→压缩(压碎)→剪切滑出"的致灾机制。结果表明,岩溶带"易压缩性"是坡体演化的关键条件之一,土工离心模型试验是一种研究岩质滑坡的有效方法。
[Abstract]:The formation and evolution process of a typical slip landslide, Wulong cocktail mountain landslide, was identified and reproduced by centrifuge model test. The test model uses barite powder, quartz sand, gypsum, glycerin, cement and water to make the geo-mechanical model of the base, karst zone and sliding body containing the model of the cocktail mountain landslide respectively, and sets up the relevant instruments and equipments. Run centrifugal test in accordance with relevant specifications. The test results show that the "compressibility" of the karst zone in the front part of the Wulong cocktail mountain landslide provides a "quasi-empty face" for the creeping of the source area, and the formation of the second fracture side is the premise of the instability of the Wulong cocktail mountain landslide. The centrifuge model test reproduces the mechanism of "creeping sliding, cracking, compression and shearing slip out" of Wulong cocktail mountain landslide. The results show that the compressibility of karst zone is one of the key conditions of slope evolution, and the geotechnical centrifuge model test is an effective method to study rock landslide.
【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;三峡大学三峡库区地质灾害教育部重点实验室;三峡大学湖北长江三峡滑坡国家野外科学观测研究站;
【基金】：国家杰出青年科学基金项目(41225011) 国家重点基础研究发展计划(973)项目(2013CB733200) 国家青年科学基金资助项目(41502291)~~
【分类号】：P642.22

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