强震区泥石流坡面物源发育规律与侵蚀坡度效应研究

doi:10.13722/j.cnki.jrme.2016.1134

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摘要汶川地震触发的滑坡崩塌地质灾害具有危害性大、规模大、数量多的特点，使震区参与泥石流活动的潜在松散物源大量增加，导致泥石流暴发频率和暴发规模较地震前明显增大。为探讨地震对强震区泥石流的影响，调查强震区泥石流物源的分布特征，并分析坡面物源的侵蚀坡度效应，通过对都汶路沿线泥石流物源调查，利用GIS技术对研究区泥石流物源空间分布进行统计分析，并基于静力学方法对物源侵蚀的坡度效应进行探讨。研究表明：(1) 利用研究区遥感影像提出灾害点并计算投影面积，利用野外调查得到灾害点样本体积，基于多元回归分析得到研究区物源体积估算模型；(2) 统计研究区不同岩性区灾害点个数与面积，得出花岗岩区灾害点发育程度最高，并分析花岗岩微观结构和构造特征；(3) 地震物源点主要在坡度40°～50°，坡向120°～150°，高程1 400～2 800 m区间发育，且随着烈度增加与发震断裂距离增加而快速增加，具有上下盘效应、背坡面效应；(4) 研究了泥石流物源侵蚀规律。地表径流深度与斜坡坡度呈负相关、坡面流速在坡度等于60°时取得最大值，物源侵蚀能力临界坡度为42.4°～48.1°。

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	张世殊1
	裴向军2
	张雄2
	冉从彦1
	马金根1

关键词 ：工程地质, 泥石流, 物源, 分布规律, 侵蚀, 坡度效应

Abstract：The geological hazard triggered by Wenchuan earthquake was characterized by great damage，huge volume and great quantity. It resulted in huge increasing of the potential material of debris flow in the earthquake area. Thus，the frequency and volume of debris increased after the earthquake. The investigation of the potential debris material along Duwen highway was conducted. The statistic of spatial distribution of debris was performed by GIS. The effect of gradient on debris erosion was analyzed. The results showed that，the hazard area and volume followed the model. The density of hazard was largest in the granitic area. The hazard mainly occurred on the slopes in the gradient range of 40°–50°，in the exposure range of 120°–150° and in the elevation range of 1 400–2 800 m. Meanwhile，it increased with increasing earthquake intensity and the distance to the surface rupture of the Wenchuan earthquake. The occurrence of the hazard followed the“hanging wall effect”and“topographic effect”. The maximum value of flow velocity of the debris was reached at slope gradient of 60° and the critical slope gradient for debris erosion was in the range of 42.4°–48.1°.

Key words： geology engineering debris flow source distribution rule erosion slope gradient effect

引用本文:

张世殊1，裴向军2，张雄2，冉从彦1，马金根1. 强震区泥石流坡面物源发育规律与侵蚀坡度效应研究[J]. 岩石力学与工程学报, 2016, 35(S2): 4139-4147.
ZHANG Shishu1，PEI Xiangjun2，ZHANG Xiong2，RAN Congyan1，MA Jingen1. Source development and slope gradient effect of debris flow source in earthquake zone. , 2016, 35(S2): 4139-4147.

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https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.1134 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS2/4139

[1]	黄润秋，裴向军，李天斌. 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. (HUANG Runqiu，PEI Xiangjun，LI Tianbin. Basic characteristics and formation mechanism of the largest scale landslide at Daguangbao occurred during the Wenchuan earthquake[J]. Journal of Engineering Geology，2008，16(6)：730-741.(in Chinese))
[2]	TANG C，ZHU J，DING J. Catastrophic debris flows triggered by a 14 August 2010 rainfall at the epicenter of the Wenchuan earthquake[J]. Landslides，2011，8(4)：485-497.
[3]	GUZZTTI F，ARDIZZONE F，CARDINALI M，et al. Distribution of landslides in the Upper Tiber River basin，central Italy[J]. Geomorphology，2008，96(1)：105-122.
[4]	HOVIUS N，STARK C，ALLEN P. Sediment flux from a mountain belt derived by landslide mapping[J]. Geology，1997，25(3)：231-234.
[5]	TSENG C，LIN C，STARK C，et al. Application of a multi-temporal，LiDAR-derived，digital terrain model in a landslide-volume estimation[J].Earth Surface Processes and Landforms，2013，38(13)：1587-1601.
[6]	KORUP O. Effects of large deep-seated landslides on hillslope morphology，western Southern Alps，New Zealand[J]. Journal of Geophysical Research，2006，111(F1)：151-162.
[7]	刘青泉，李家春，陈力，等. 坡面流及土壤侵蚀动力学(II)—土壤侵蚀[J]. 力学进展，2004，34(4)：493-506.(LIU Qingquan，LI Jiachun，CHEN Li，et al，Dynamics of overland flow and soil erosion (II)—soil erosion[J]. Advances in Mathematic，2004，34(4)：493-506(in Chinese))
[8]	吴永，裴向军，何思明，等. 降雨型泥石流对沟床侵蚀的水力学机理[J]. 浙江大学学报：工学版，2013，47(9)：1585-1592.(WU Yong，PEI Xiangjun，HE Siming，etal. Hydraulic mechanism of gully bed erosion by debris flow in rainfall[J].Journal of Zhejiang University：Engineering Science，2013，47(9)：1585-1592. (in Chinese))
[9]	OUYANG Z Y，HE S M，TANG C. Numerical analysis of dynamics of debris flow over erodible beds in Wenchuan earthquake-induced area[J].Engineering Geology，2015，194(28)：62-72.
[10]	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.( ZHUANG Jianqi，CUI Peng，HU Kaiheng，et al. Research on debris flow initiation due to bed failure after Wen chuan earthquake[J]. Journal of Sichuan University：Engineering Science，2010，42(5)：230-236.(in Chinese))
[11]	丁军. 强震区泥石流活动规模与最大堆积长度预测研究[硕士学位论文][D]. 成都：成都理工大学，2011.(DING Jun. Research on magnitude and runout distance of debris-flows in strong earthquake area[M. S. Thesis][D]. Chengdu：Chengdu University ofTechnology，2011.(in Chinese))
[12]	WHITEHOUSE I. Distribution of large rock avalanche deposits in the Central Southern Alps，New Zealand[J]. New Zealand Journal of Geology and Geophysics，1983，26(3)：271-279.
[13]	GUZZTTI F，ARDIZZONE F，CARDINALI M，et al. Landslides volumes and landslide mobilization rates in Umbria，central Italy[J]. Earth and Panetary Sciences Letters，2009，279(3)：222-229.
[14]	SIMONETT DS.Landslide distribution and earthquakes inthe Bewani and Torricelli Mountains，New Guinea. Landformstudies from Australia and New Guinea-a statistic analysis[C]// Landform Studiesfrom Australia and New Guinea. Cambridge，UK：Cambridge University Press，1967：64-84.
[15]	WOOLHIER D A，liggelt J A. Unsteady one-dimensional flow over a plane-the rising hydrograph[J]. Cond Plant Growth Jpn，1996，3(3)：753-771.
[16]	刘青泉，陈力，李家春. 坡度对坡面土壤侵蚀的影响分析[J]. 应用数学和力学，2001，22(5)：449-457.(LIU Qingquan，CHEN Li，LI Jiachun，Influences of slope gradient on soil erosion[J]. Applied Mathematics and Mechanics，2001，22(5)：449-457.(in Chinese))
[17]	LIMA J L M P. Model KININF for overland flow on pervious surface[C]// Overland Flow. [S. l.]：UCL Press，1992
[18]	曹文洪. 土壤侵蚀的坡度界限研究[J]. 水土保持通报，1998，13(4)：1-5.(CAO Wenhong，Slope gradient limited study of soil erosion[J]. Bulletin of Soil and Water Conservation，1998，13(4)：1-5.(in Chinese))
[19]	洪正修. 关于泥石流流速计算公式的探讨[J].铁道工程学报，1988，(1)：87-94.(HONG Zhengxiu，Discussion on debris flow velocity calculation formula[J]. Journal of Railway Engineering Society，1988，(1)：87-94.(in Chinese))
[20]	倪九派，魏朝富，谢德体，等. 坡度对山峡库区紫色土坡度径流侵蚀的影响分析[J]. 泥沙研究，2009，(2)：29-33.(NI Jiupai，WEI Chaofu，XIE Delin，etal. Influence of slope gradient on runoff erosion of purple soil slope in the Three Gorges Reservoir area[J]. Journal of Sediment Research，2009，(2)：29-33.(in Chinese))
[21]	张雄，裴向军. 泥石流启动的临界地表径流深度研究[J]. 成都大学学报：自然科学版，2014，33(3)：286-289.(ZHANG Xiong，PEI Xiangjun，Critical surface runoff depth study of debris flow start up[J]. Journal of Chengdu University：Natural Science，2014，33(3)：286-289.(in Chinese))
[22]	YAIR A， KLEIU M. The influence of surface properties on flow and erosion processes on debris covered slopes in an arid area[J]. Catena，1973，1(1)：1-8.
[23]	汤立群，陈国祥，蔡名扬. 黄土丘陵区小流域产沙数学模型[J]. 河海大学学报：自然科学版，1990，18(6)：10-15.(TANG Liqun，CHEN Guoxiang，CAI Mingyang，A mathematical model of sediment yield on small watershed in the gullied-hilly loess plateau[J]. Journal of Hohai University：Natural Sciences，1990，18(6)：10-15.(in Chinese))