某泥石流形成机制及动力学特征分析
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摘要
大山沟位于5.12汶川地震的严重影响区,为了研究地震对其影响,通过详细的野外调查和勘查,对泥石流影响因素、形成机制和动力特征进行了探讨.大山沟是典型的暴雨型泥石流沟,三区明显,具备发生泥石流的三大条件;选择合理经验公式计算大山沟泥石流的重度、流量、流速、一次泥石流过流总量及一次泥石流固体物质冲出量等主要特征值;该泥石流沟在多重因素的综合影响下,进入了灾害活跃期,对泥石流的发生机制进行了系统研究.
DA Shan Gull is located in Sichuan Province,which is one of the seriously affected counties during 5.12 Earthquake.In order to study the earthquake's influence on debris flow gullies in affected areas during 5.12 Earthquake,we studied the characteristics and development trends of debris f low in the Gully based on detailed field survey and investigation.DA Shan Gully is a typical rainstorm debris flow gully.This paper selected reasonable scientific empirical formula to determine the main dynamic eigenvalue,such as severe,flow,flow rate and so on.In the combined effects of multiple factors,DA Shan Gully entered the active phase of debris flow disaster; the number will continue to increase; the frequency and the scale increase ceaselessly.The paper analyzes the occurrence mechanism of the Gully debris flow.
DA Shan Gull is located in Sichuan Province,which is one of the seriously affected counties during 5.12 Earthquake.In order to study the earthquake's influence on debris flow gullies in affected areas during 5.12 Earthquake,we studied the characteristics and development trends of debris f low in the Gully based on detailed field survey and investigation.DA Shan Gully is a typical rainstorm debris flow gully.This paper selected reasonable scientific empirical formula to determine the main dynamic eigenvalue,such as severe,flow,flow rate and so on.In the combined effects of multiple factors,DA Shan Gully entered the active phase of debris flow disaster; the number will continue to increase; the frequency and the scale increase ceaselessly.The paper analyzes the occurrence mechanism of the Gully debris flow.
引文
[1]张永双,雷伟志,石菊松,等.四川5.12地震次生地质灾害的基本特征分析[J].地质力学学报,2008,14(2):109-114.
[2]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):0751-0758.
[3]姚勇,高加成,姚文花.临潼大水沟泥石流特征分析及危险性评价[J].铁道工程学报,2010(11):5-9.
[4]黄润秋,李为乐.“5·12”汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报,2008,27(12):2585-2592.
[5]黄润秋.“5·12”汶川大地震地质灾害的基本特征及其对灾后重建影响的建议[J].中国地质教育,2008(2):21-24.
[6]铁永波,徐如阁,巴仁基.典型冰碛补给型泥石流物源补给过程与机制研究-以泸定县干沟为例[J].水土保持通报,2013,33(1):77-80.
[7]姚勇.国道G212大吉沟泥石流特征及易发性分析[J].嘉应学院学报:自然科学版,2013,31(5):31-35.
[2]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):0751-0758.
[3]姚勇,高加成,姚文花.临潼大水沟泥石流特征分析及危险性评价[J].铁道工程学报,2010(11):5-9.
[4]黄润秋,李为乐.“5·12”汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报,2008,27(12):2585-2592.
[5]黄润秋.“5·12”汶川大地震地质灾害的基本特征及其对灾后重建影响的建议[J].中国地质教育,2008(2):21-24.
[6]铁永波,徐如阁,巴仁基.典型冰碛补给型泥石流物源补给过程与机制研究-以泸定县干沟为例[J].水土保持通报,2013,33(1):77-80.
[7]姚勇.国道G212大吉沟泥石流特征及易发性分析[J].嘉应学院学报:自然科学版,2013,31(5):31-35.
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