溃决型泥石流形成过程分析

doi:10.13722/j.cnki.jrme.2016.1518

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Abstract

Until now，the formation process of debris flow from natural dam failure is still unclear and there has not been a formation condition for outburst debris flow. In this paper，we present the results of a series of laboratory tests that assessed three different materials，five different flume bed slope angles (2°，7°，9°，10°and 13°)，two in-flow rates and four types of dam geometric shapes. It shows that debris flow is easier to form from natural dam failure than gully erosion. The unit weight of water-sand mixture in the downstream increases firstly，and then decreases with time developing. The results also show that the unit weight of water-sand mixture is seriously affected by channel bed slopes. In addition，the decrease of median diameter and the increase of downstream slope can both increase the unit weight of water-sand mixture，and the unit weight of water-sand mixture is less sensitive to downstream slope of the dam than channel bed slopes and dam geometric shapes. Based on the theory of stream power and experimental data，we established a critical condition for debris flow formation from natural dam failure，which is simple to calculate and the parameters can be obtained easily. Combining four cases，it indicates that the established critical condition agrees well with the field.

Key words： engineering geology natural dams failure debris flow

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	JIANG Xiangang1
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Cite this article:

JIANG Xiangang1,2. Analysis on the formation process of outburst debris flow[J]. , 2018, 37(S1): 3613-3622.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.1518 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3613

[1] COSTA J E，SCHUSTER R L. The formation and failure of natural dams[J]. Geological Society of America Bulletin，1988，100(7)：1 054–1 068.

[2] BUTLER D R，MALANSON G P，OELFKE J G. Potential catastrophic flooding from landslide-dammed lakes，Glacier National Park，Montana，USA[J]. Zeitschrift für Geomorphologie Supplementband，1991，83：195–209.

[3] HANISCH J. Usoi landslide dam in Tajikistan–the world′s highest dam，First stability assessment of the rock slopes at Lake Sarez[C]// Proceedings of the 1st European Conference on Landslides，Prague. [S. l.]：[s. n.]，2002：189–197.

[4] ZECH Y，SOARES-FRAZÃO S，SPINEWINE B，et al. Dam-break induced sediment movement：experimental approaches and numerical modelling[J]. Journal of Hydraulic Research，2008，46(2)：176–190.

[5] PICKERT G，WEITBRECHT V，BIEBERSTEIN A. Breaching of overtopped river embankments controlled by apparent cohesion[J]. Journal of Hydraulic Research，2011，49(2)：143–156.

[6] ROZOV A L. Modeling of washout of dams[J]. Journal of Hydraulic Research，2003，41(6)：565–577.

[7] CAO Z，YUE Z，PENDER G. Landslide dam failure and flood hydraulics. Part I：experimental investigation[J]. Natural Hazards，2011，59(2)：1 003–1 019.

[8] DOU S T，WANG D W，YU M H，et al. Numerical modeling of the lateral widening of levee breach by overtopping in a flume with 180° bend[J]. Natural Hazards and Earth System Sciences，2014，14(1)：11–20.

[9] TAKAHASHI T. Mechanical characteristics of debris flow[J]. Journal of the Hydraulics Division，1978，104(8)：1 153–1 169.

[10] TAKAHASHI T. Debris flow on prismatic open channel[J]. Journal of the Hydraulics Division，1980，106(3)：381–396.

[11] 王兆印，张新玉. 水流冲刷沉积物生成泥石流的条件及运动规律的试验研究[J]. 地理学报，1989，(3)：291–301.(WANG Zhaoyin，ZHANG Xinyu. Experimental study of formation and laws of motion of debris flow[J]. Acta Geographica Sinica，1989，(3)：291–301.(in Chinese))

[12] TOGNACCA C，BEZZOLA G R，MINOR H E. Threshold criterion for debris-flow initiation due to channel-bed failure[C]// Proceedings of the 2nd Int. Conf. on Debris Flow，Hazards and Mitigation，Taipei/Taiwan. Rotterdam：A. A. Balkema，2000：89–97.

[13] GREGORETTI C，FONTANA G D. The triggering of debris flow due to channel‐bed failure in some alpine headwater basins of the dolomites：analyses of critical runoff[J]. Hydrological Processes，2008，22(13)：2 248–2 263.

[14] 康志成，李焯芬，马蔼乃，等. 中国泥石流研究[M]. 北京：科学出版社，2004：21–22.(KANG Zhicheng，LEE C F，MA Ainai，et al. Research on debris flow in China[M]. Beijing：Science Press，2004：21–22.(in Chinese))

[15] 中华人民共和国行业标准编写组. GT/T0220—2006泥石流灾害防治工程勘查规范[J]. 北京：中国标准出版社，2006.(The Professional Standards Compilation Group of People¢s Republic of China. GT/T0220—2006 Standard for investigation of disaster prevention and control of debris flows[S]. Beijing：China Planning Press，2006. (in Chinese))

[16] 王裕宜，詹钱登，严璧玉. 泥石流体的流变特性与运移特征[M]. 长沙：湖南科学技术出版社，2014：2.(WANG Yuyi，ZHAN Qiandeng，YAN Biyu. Debris flow rheology and movemen[M]. Changsha：Hunan Science and Technology Press，2014：2.(in Chinese))

[17] 周必凡，李德基，罗德富，等. 泥石流防治指南[M]. 北京：科学出版社，1991：125–129.(ZHOU Bifan，LI Deji，LUO Defu，et al. Guide to prevention of debris flow[M]. Beijing：Science Press，1991：125–129.(in Chinese))

[18] 费祥俊，舒安平. 泥石流运动机制与灾害防治[M]. 北京：清华大学出版社，2004：41.(FEI Xiangjun，SHU Anping. Movement mechanism and disaster control for debris flow[M]. Beijing：Press of University of Tsinghua，2004：41.(in Chinese))

[19] 李培基，梁大兰. 泥石流重度及其计算[J]. 泥沙研究，1982，9(3)：75–83.(LI Peiji，LIANG Dalan. Debris flow density and its Calculation[J]. Sediment Research，1982，9(3) ：75–83.(in Chinese))

[20] 蒋先刚，崔鹏，王兆印，等. 堰塞坝溃口下切过程试验研究[J]. 四川大学学报：工程科学版，2016，48(4)：38–44.(JIANG Xiangang，CUI Peng，WANG Zhaoyin，et al. Experiments investigation on longitudinal breaching of natural dam[J]. Journal of Sichuan University：English Science，2016，48(4)：38–44.(in Chinese))

[21] YANG C T. Unit stream power equation for gravel[J]. Journal of Hydraulic Engineering，1984，110(12)：1 783–1 797.

[22] BAGNOLD R A. An approach to the sediment transport problem from general physics[R]. [S.l.]：Us Geol.Surv.Prof.Paper，1966，422：i1–i37.

[23] FROEHLICH D C. Peak outflow from breached embankment dam[J]. Journal of Water Resources Planning and Management，1995，121(1)：90–97.

[24] 李丽，余斌，张健楠，等. 基于震后堰塞坝演化的泥石流危险性分析——以汶川县茶园沟堰塞坝演化为例[J]. 桂林理工大学学报，2011，31(3)：357–363.(LI Li，YU Bin，ZHANG Jiannan，et al. Risk analysis based on the evolution of earthquake dammed debris flow—a case from the evolution of barrier lake in Chayuan Gully，Wenchuan[J]. Journal of Guilin University of Technology，2011，31(3)：357–363.(in Chinese))

[25] LIU N，CHEN Z，ZHANG J X，et al. Draining the Tangjiashan barrier lake[J]. Journal of Hydraulic Engineering，2010，136(11)：914–923.

[26] WANG L，CHEN Z，WANG N，et al. Modeling lateral enlargement in dam breaches using slope stability analysis based on circular slip mode[J]. Engineering Geology，2016，209：70–81.

[27] CHANG D S，ZHANG L M. Simulation of the erosion process of landslide dams due to overtopping considering variations in soil erodibility along depth[J]. Natural Hazards and Earth System Sciences，2010，10(4)：933–946.