三峡库区观音阁滑坡治理设计浅析

    Analysis on the landslide regulating design of the Kwan-yin psavilion in Three Gorges reservoir

    • 摘要: 长江三峡观音阁滑坡在我国是一个知名的滑坡,也是一个典型的继承性再复活滑坡。该滑坡距三峡大坝约43km,为混合式大型土质滑坡。早在1933年该滑坡曾发生过大规模的滑移,前缘物质泻入长江,滑坡体在江岸形成杂乱无章的陇岗地形。近年来由于三峡库区蓄水,该滑坡重新复活,前缘出现了剪出口,后缘可见数条拉张裂缝,该滑坡明显进入蠕动变形阶段。随着三峡库区蓄至156m、175m水位后,或在灾害性暴雨条件下,该滑坡有可能发生大规模滑移。将直接威胁滑坡体上的公路、村庄及居民生命财产安全。滑坡体瞬时泻入长江,将堵塞长江航道,对附近船只造成灾难性损失。笔者参加了该滑坡的地质灾害勘察和设计工作,本文旨在通过对观音阁滑坡设计方案的分析,为今后研究继承性再复活滑坡提供一些设计思路。

       

      Abstract: The landslide of the Kwan-yin Pavilion in Three Gorges is known in China. It is a typical succession tectonics landslide. It is also a large composite soil landslide, about 43 kilometers to Three Gorges Dam. As early as 1933, the landslide happened large-scale slippage. Slump deposit rushed down into Yangtze River and shaped the disorderly hillock landform. In these years, this landslide relives because of the sluice of Three Gorges Reservoir. Sheared fracture appears in the front edge and tensile cracks are obvious in the after-edge. It comes into creep deformation phase. When the water level reaches 156 meters to 175 meters, or disaster rainstorm happens, the landslide maybe slip largely. That will threaten the safety of roads and countries, and dwellers' life and property. If the landslide body rushes down into Changjiang River, the river route will be jammed. Disaster loss will happen for the round ships. The author takes part in the geology disaster reconnaissance and regulating design of the landside. The paper analyses the design scheme of the Kwan-yin Pavilion landslide and provides the design way for the future research on the succession tectonics landslide.

       

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