枇杷沟泥石流基本特征分析与评价
|
摘要
以枇杷沟地区地质环境为基础,综合多因素分析阐明:枇杷沟泥石流的发生除受地形地貌等因素的影响外,地震过程中受损岩土体为泥石流的发生提供了大量物源,但主控因素为降雨量及降雨强度。在进行大量野外地质工作的基础上,运用数学手段对枇杷沟泥石流特征值进行计算和确定并最终分析表明:地震地质作用与外动力地质作用所形成的崩滑物在粒度和分选上有所区别,对泥石流的容重和流量有所影响;震后灾区泥石流对泥石流沟道有着明显的拓宽效应和"刮铲效应",使泥石流过水断面面积和泥石流平均流速发生显著变化,所以在确定新的参数并得到新的流量值后有必要使用行之有效的计算方法对计算结果进行验证。
Based on loquat gully geological environment,and a comprehensive analysis on multivariate factors,the paper indicates that:in addition to the affect factors of landform,the damaged rocks during earthquake provide a large number of material resources for the occurrence of loquat gully landslides debris flow.However,the main controlling factors are the amount and intensity of rain fall.On the basis of a lot of field geology work,mathematical means,the calculation and identification to loquat gully debris flow have been made and the final analysis shows that the slump matters caused by geological actions of earthquakes and exogenic geological formation have differences in size and sorting,have an impact on the bulk density and flow of debris flow.After the earthquakes,the debris flow in disaster place has a clear broadening effect in flow channel and "ploughing and erosion effect",which causes significant changes on debris flow cross section area and average velocity.Thereafter,it is necessary to use an effective method of calculation to calculate and verity the results after identifying the new parameters and the new flow rate value.
Based on loquat gully geological environment,and a comprehensive analysis on multivariate factors,the paper indicates that:in addition to the affect factors of landform,the damaged rocks during earthquake provide a large number of material resources for the occurrence of loquat gully landslides debris flow.However,the main controlling factors are the amount and intensity of rain fall.On the basis of a lot of field geology work,mathematical means,the calculation and identification to loquat gully debris flow have been made and the final analysis shows that the slump matters caused by geological actions of earthquakes and exogenic geological formation have differences in size and sorting,have an impact on the bulk density and flow of debris flow.After the earthquakes,the debris flow in disaster place has a clear broadening effect in flow channel and "ploughing and erosion effect",which causes significant changes on debris flow cross section area and average velocity.Thereafter,it is necessary to use an effective method of calculation to calculate and verity the results after identifying the new parameters and the new flow rate value.
引文
[1]黄润秋,裴向军,李大斌.汶川地震触发大光包巨型滑坡基本特征及形成机理分析[J].工程地质学报,2008,16(6):730-741.
[2]裴向军,郝永峰,张军新,等.老鹰岩滑坡成因机制与运动特征研究[J].地质灾害与环境保护,2010,21(4):28-32.
[3]庄建琦,崔鹏,葛永刚,等.降雨特征与泥石流总量的关系分析[J].北京林业大学学报,2009,31(4):77-83.
[4]许强.四川省8·13特大泥石流灾害特点、成因与启示[J].工程地质学报,2010,18(5):597-608.
[5]唐川,梁京涛.汶川震区北川9·24暴雨泥石流特征研究[J].工程地质学报,2008,16(6):751-758.
[6]李三明,张艳涛,汤江红.泥石流特征值的计算与确定——以四川省石棉县出路沟泥石流为例[J].资源环境与工程,2010,24(3):297-300.
[7]李祥龙,唐辉明,熊承仁,等.基底刮铲效应对岩石碎屑流停积过程的影响[J].岩土力学,2012,33(5):1528-1534.
[8]Hiroshi Ikeya.日本的泥石流及其防范措施[J].朱桂芳,王生,译.世界地质,1992,11(2):78-90.
[9]吴积善.泥石流及其综合治理[M].北京:科学出版社,1993.
[10]B C斯捷潘诺夫.泥石流与泥石流体的基本特性及其量测方法[M].孟河清,译.重庆:科学技术文献出版社重庆分社,1986.
[11]中华人民共和国国土资源部.DZ/T 0220—2006泥石流灾害防治工程勘察规范[S].北京:中国标准出版社,2006.
[12]四川省水利电力厅四川省中小流域暴雨洪水计算手册[M].成都:[出版者不详],1984.
[2]裴向军,郝永峰,张军新,等.老鹰岩滑坡成因机制与运动特征研究[J].地质灾害与环境保护,2010,21(4):28-32.
[3]庄建琦,崔鹏,葛永刚,等.降雨特征与泥石流总量的关系分析[J].北京林业大学学报,2009,31(4):77-83.
[4]许强.四川省8·13特大泥石流灾害特点、成因与启示[J].工程地质学报,2010,18(5):597-608.
[5]唐川,梁京涛.汶川震区北川9·24暴雨泥石流特征研究[J].工程地质学报,2008,16(6):751-758.
[6]李三明,张艳涛,汤江红.泥石流特征值的计算与确定——以四川省石棉县出路沟泥石流为例[J].资源环境与工程,2010,24(3):297-300.
[7]李祥龙,唐辉明,熊承仁,等.基底刮铲效应对岩石碎屑流停积过程的影响[J].岩土力学,2012,33(5):1528-1534.
[8]Hiroshi Ikeya.日本的泥石流及其防范措施[J].朱桂芳,王生,译.世界地质,1992,11(2):78-90.
[9]吴积善.泥石流及其综合治理[M].北京:科学出版社,1993.
[10]B C斯捷潘诺夫.泥石流与泥石流体的基本特性及其量测方法[M].孟河清,译.重庆:科学技术文献出版社重庆分社,1986.
[11]中华人民共和国国土资源部.DZ/T 0220—2006泥石流灾害防治工程勘察规范[S].北京:中国标准出版社,2006.
[12]四川省水利电力厅四川省中小流域暴雨洪水计算手册[M].成都:[出版者不详],1984.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心