库水与降雨联合作用下藕塘滑坡稳定性研究

发布时间：2018-05-17 23:27

  本文选题：库水位 + 降雨　； 参考：《人民黄河》2017年07期

【摘要】：三峡库区因降雨充沛、地质环境脆弱而地质灾害频发,库水及降雨作用是导致库区滑坡变形破坏的重要影响因素。藕塘滑坡为一滑体深厚、多序次解体、规模巨大的靠椅状顺层岩质涉水滑坡,通过建立藕塘滑坡多滑带地质模型,来研究库水联合降雨作用下滑坡的变形和稳定性。结果表明,藕塘滑坡为动水压力型滑坡,浅层滑体对降雨强度和库水位波动敏感性较高,其稳定性主要受库水位波动影响;深层滑体稳定性在降雨强度低于160 mm/d时受库水位波动和降雨强度综合作用影响,反之主要受降雨强度影响;虽然前缘反翘段和前期治理工程具有一定阻滑作用,但藕塘滑坡整体处于潜在欠稳定状态,在大暴雨及库水位骤降作用下可能发生失稳破坏。
[Abstract]:The three Gorges reservoir area is prone to frequent geological disasters due to abundant rainfall and fragile geological environment. Reservoir water and rainfall are important influencing factors for landslide deformation and destruction in the reservoir area. The Yutang landslide is a kind of rock-wading landslide with a deep sliding body, multi-sequence disintegration and a large scale rock-like bedding. The deformation and stability of the landslide under the combined rainfall of reservoir and water are studied by establishing the geological model of the multi-slip zone of the Yutang landslide. The results show that the Yutang landslide is a hydrodynamic pressure landslide, and the shallow sliding body is highly sensitive to rainfall intensity and reservoir water level fluctuation, and its stability is mainly affected by reservoir water level fluctuation. The stability of deep sliding body is affected by water level fluctuation and rainfall intensity when rainfall intensity is less than 160 mm/d, whereas it is mainly affected by rainfall intensity. However, the whole Yutang landslide is in a potentially unstable state, which may be unstable under the action of heavy rain and sudden drop of reservoir water level.
【作者单位】： 江西省交通咨询公司;江西省交通科学研究院;
【基金】：江西省交通运输厅科研项目(KT2015013)
【分类号】：TV223;TV697.3
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本文编号：1903350