水打沟岸坡堆积体滑坡转化为泥石流的前期降雨条件分析
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摘要
2010年8.13水打沟滑坡型泥石流危害严重,为此有必要分析研究滑坡起动条件及滑坡转化为泥石流的前期降雨条件,以便为预测滑坡型泥石流奠定基础。针对水打沟处地形地貌条件、地层岩性、地质构造条件和2010年8月13日的暴雨条件,从静力学和动力学角度分析了滑坡堆积体在强降雨条件下的起动条件及斜坡松散堆积体其失稳条件时的地表径流水深,得到了水打沟8.13泥石流形成前滑坡转化为泥石流时的前期降雨量、降雨强度及泥石流爆发时间等,可为经历过2008年汶川5.12大地震后的同类冲沟滑坡及泥石流预测、预防提供参考。
The landslide debris flow is seriously harm in Shuida gully on August 13,2010.So it is necessary to study the starting conditions of landslide and the prophase rainfall condition of slope landslide conversion into debris flow,which can lay the foundation for forecasting the landslide-type debris flow.Aiming at the terrain conditions,the formation lithology,the geological structure conditions of Shuida gully and the rainstorm conditions on August 13,2010,it analyzes the loose landslide starting conditions in the strong rainfall conditions and the depth of surface runoff when the accumulation body is instability from the view of static and dynamic.And then the prophase rainfall,rainfall intensity and starting time of Shuida gully debris flows are obtained before the debris flow formed.Thus,it can provide reference for prediction and prevention similar gully after the 5.12 Wenchuan earthquake in 2008.
The landslide debris flow is seriously harm in Shuida gully on August 13,2010.So it is necessary to study the starting conditions of landslide and the prophase rainfall condition of slope landslide conversion into debris flow,which can lay the foundation for forecasting the landslide-type debris flow.Aiming at the terrain conditions,the formation lithology,the geological structure conditions of Shuida gully and the rainstorm conditions on August 13,2010,it analyzes the loose landslide starting conditions in the strong rainfall conditions and the depth of surface runoff when the accumulation body is instability from the view of static and dynamic.And then the prophase rainfall,rainfall intensity and starting time of Shuida gully debris flows are obtained before the debris flow formed.Thus,it can provide reference for prediction and prevention similar gully after the 5.12 Wenchuan earthquake in 2008.
引文
[1]李树德,曾思伟.论泥石流的另一种类型——滑坡型泥石流[J].水土保持学报,1988,2(4):66-71.
[2]张明,胡瑞林,殷跃平,等.滑坡型泥石流转化机制环剪试验研究[J].岩石力学与工程学报,2010,29(4):822-832.
[3]李康康.滑坡型泥石流的形成机理和规模[J].化工矿产地质,2010,32(3):160-162.
[4]庄建琦,崔鹏,胡凯衡,等.沟道松散物质起动形成泥石流实验研究[J].四川大学学报(工程科学版)2010,42(5):230-236.
[5]Tang C,Van Asch T W J,Chang J,et al.Cata-strophic Debris Flows on 13 August 2010in theQingping Area,Southwestern China:The CombinedEffects of a Strong Earthquake and Subsequent Rain-storms[J].Geomorphology,2012,139-140:559-576.
[6]四川省地质工程勘察院.都江堰市龙池镇水打沟泥石流应急勘查报告[R].成都:四川省地质工程勘察院,2010.
[7]王裕宜,邹仁元,李昌志.泥石流土体侵蚀与始发雨量的相关性研究[J].土壤侵蚀与水土保持学报,1999,5(6):34-38.
[8]朱首明.土力学(第二版)[M].中国建筑工业出版社,2005.
[9]田凯,李小青,申震洲,等.不同床沙下的坡面流水力学特性试验研究[J].水土保持学报,2010,24(2):70-73.
[2]张明,胡瑞林,殷跃平,等.滑坡型泥石流转化机制环剪试验研究[J].岩石力学与工程学报,2010,29(4):822-832.
[3]李康康.滑坡型泥石流的形成机理和规模[J].化工矿产地质,2010,32(3):160-162.
[4]庄建琦,崔鹏,胡凯衡,等.沟道松散物质起动形成泥石流实验研究[J].四川大学学报(工程科学版)2010,42(5):230-236.
[5]Tang C,Van Asch T W J,Chang J,et al.Cata-strophic Debris Flows on 13 August 2010in theQingping Area,Southwestern China:The CombinedEffects of a Strong Earthquake and Subsequent Rain-storms[J].Geomorphology,2012,139-140:559-576.
[6]四川省地质工程勘察院.都江堰市龙池镇水打沟泥石流应急勘查报告[R].成都:四川省地质工程勘察院,2010.
[7]王裕宜,邹仁元,李昌志.泥石流土体侵蚀与始发雨量的相关性研究[J].土壤侵蚀与水土保持学报,1999,5(6):34-38.
[8]朱首明.土力学(第二版)[M].中国建筑工业出版社,2005.
[9]田凯,李小青,申震洲,等.不同床沙下的坡面流水力学特性试验研究[J].水土保持学报,2010,24(2):70-73.
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