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利用贡献率分析法研究河道型水库两岸滑坡发育规律
引用本文:崔玉龙,魏进兵,邓建辉,陈滔,杨宇硕.利用贡献率分析法研究河道型水库两岸滑坡发育规律[J].四川大学学报(工程科学版),2013,45(3):50-56.
作者姓名:崔玉龙  魏进兵  邓建辉  陈滔  杨宇硕
作者单位:1. 四川大学水利水电学院,四川成都,610065
2. 四川大学水利水电学院,四川成都610065;中机三勘岩土工程有限公司,湖北武汉430030
3. 中机三勘岩土工程有限公司,湖北武汉,430030
摘    要:通过实地调查发现金沙江向家坝段大多数滑坡发育于坝址-新市镇侏罗系地层,且为顺层滑坡,顺层滑坡在水库蓄水后容易复活且顺层岸坡在水库蓄水后容易发生新的滑坡.通过实地调查并借助勘察资料建立该段滑坡数据库,研究坝址-新市镇段不同岩层倾角、不同岸坡结构类型、不同河流弯曲类型对滑坡发育的影响,并且定量统计这3种因数的各种类型分别对滑坡的贡献率.结果表明:层面倾角为10°~ 19°的岸坡,对滑坡贡献率最高,层面倾角为30°~34°的岸坡对滑坡贡献率最低;缓倾外顺向层状岸坡对滑坡贡献率最高,中倾外顺向层状岸坡对滑坡贡献率最低;河流的凹岸对滑坡贡献率最高,凸岸贡献率最低.所得研究结果与实际情况较为吻合,为水库岸坡危险评价提供量化标准,同时为库区以后的规划建设提供选址依据.

关 键 词:向家坝库区  岸坡结构  岩层倾角  贡献率  滑坡
收稿时间:2012/10/18 0:00:00
修稿时间:1/9/2013 3:08:01 AM

Development Law of Landslides in the Either Bank of the Channel Reservoir with the Analysis of Contribution Rate
Cui Yulong,Wei Jinbing,Deng Jianhui,Chen Tao and Yang Yushuo.Development Law of Landslides in the Either Bank of the Channel Reservoir with the Analysis of Contribution Rate[J].Journal of Sichuan University (Engineering Science Edition),2013,45(3):50-56.
Authors:Cui Yulong  Wei Jinbing  Deng Jianhui  Chen Tao and Yang Yushuo
Affiliation:Sichuan University,Sichuan University,,School of Water Resources and Hydropower, Sichuan Univ,China Machinery TIDI Geotechnical Engineering CO.,Ltd
Abstract:Great majority of the landslides in Xiangjiaba segment of Jinsha River developing from the dam site to the Xinshi town segment where outcrop Jurassic strata, is found through field survey, besides most of these landslides are bedding slopes. The bedding landslide is apt to revive and the bedding bank slop is prone to revive after the reservoir impounding. At first, a landslide database is established through field survey and with the help of geotechnical investigation dates, then the effect of different dip angle to the development of landslides is studied by the contribution rate method, which is also applied to the bank structure types and river bought types. At last, a quantitative statistic on those three factors are also made to analys the contribution rate to landslides. It is found that the dip angles of bedding surface to the maximum contribution rate is between 10°and 19°, the minimal contribution rate is between 30° and 34°; similar to the dip angles, the maximum contribution rate is gently dipping outer forward layered bank slope ,the minimal contribution rate is medium dipping outer forward layered bank slope; the concave bank of the river has the maximum contribution rate while the convex bank of the river has the minimal one. The result is coincide with the actual situation, which offers a quantitative criteria for evaluating the risk of reservoir bank slop and provides basis for planning and constructing of the reservoir in the future.
Keywords:Xiangjiaba reservoir region  bank structure  dip angle of strata  contribution rate  landslide
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