Centrifugal model tests on formation mechanism of landslide-type debris flows of cohesiveless soils

被引：0

作者：

Zhou, Jian ^{[1
,2
]}

Du, Qiang ^{[1
,2
]}

Li, Ye-Xun ^{[3
]}

Zhang, Jiao ^{[4
]}

机构：

[1] Department of Geotechnical Engineering, Tongji University, Shanghai

[2] Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai

[3] The Second Engineering Company of CCCC Third Harbor Engineering Co. Ltd., Shanghai

[4] Department of Civil Engineering and Transportation, Shanghai Polytechnic College, Shanghai

来源：

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2014年 / 36卷 / 11期

关键词：

Centrifugal model test; Formation mode; Landslide-type debris flow; Water-soil action mechanism;

D O I：

10.11779/CJGE201411006

中图分类号：

学科分类号：

摘要：

Using the self-developed visualization test apparatus, centrifuge model tests are carried out to study the macro-mesoscopic formation mechanism of typical landslide-type debris flows according to field tests on a debris flow. Based on the grain-size gradation of field tests and gravity ratio, the centrifugal model tests are carried out under 20g. The soil samples are made up by silt sands and fine sands. The formation mode and soil-water action mechanism of landslide-type debris flows are analyzed from the macroscopic and mesoscopic points of view respectively by using the HD digital imaging equipment and the mesoscopic structure analysis software Geodip. The test results indicate that the centrifugal model tests can reproduce the phenomenon of the field tests approximatively. The formation mode of landslide-type debris flows is gradually collapsed in form of retrogradation to sliding. The reason of the formation of landslide-type debris flows is the shear strength failure of the slope caused by the rise of the pore water pressure and the seepage on the floor resulted from the motion of the fine particles with migratation of pore water in the slope. ©, 2014, Nanjing Hydraulic Research Institute. All right reserved.

引用

页码：2010 / 2017

页数：7

共 14 条

[1]

Kang Z.-C., Li Z.-F., Debris Flow Research of China , (2004)

[2]

Yang W.-M., Wu S.-R., Zhang Y.-S., Et al., Research on formation mechanism of the debris flow on slope induced by rainfall , Earth Science Fronters, 14, 6, pp. 197-204, (2007)

[3]

Zhou J., Li Y.-X., Zhou K.-M., Et al., Impact of permeability on failure mode of sandy debris flow , International Conference on Advances in Geotechnical Engineering, pp. 657-662, (2011)

[4]

Xu Q., The 13 August 2010 catastrophic debris flows in Sichuan Province: characteristics, genetic mechanism and suggestions , Journal of Engineering Geology, 18, 5, pp. 596-608, (2010)

[5]

Vincenzo D., Zesca M., Marchi L., Field and laboratory investigations of runout distances of debris flows in the Dolomites (Eastern Italian Alps) , Geomorphology, 115, pp. 294-304, (2010)

[6]

Zhu Y.-Y., Cui P., Chen X.-Q., Experiment on mechanism of slope failure of debris flow fan and stability analysis , Chinese Journal of Rock Mechanics and Engineering, 24, 21, pp. 3927-3934, (2005)

[7]

Chen X.-Q., Cui P., Feng Z.-L., Et al., Artificial rainfall experimental study on landslide translation to debris flow , Chinese Journal of Rock Mechanics and Engineering, 25, 1, pp. 106-116, (2006)

[8]

Li S.-D., Formation mechanism of the lanaslide-type debris flow , Acta Scientiarum Naturalium Universitatis Pekinensis, 34, 4, pp. 519-522, (1998)

[9]

Feng Z.-L., Cui P., He S.-M., Mechanism of conversion of landslides to debris flows , Journal of Natural Disarsters, 14, 3, pp. 8-14, (2005)

[10]

Zhou J., Li Y.-X., Jia M.-C., Et al., Numerical simulation of failure behavior of granular debrisflows based on flume model tests, (2013)

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