IMHE OpenIR  > 山地灾害与地表过程重点实验室
longrunoutmechanismoftheshenzhen2015landslideinsightsfromatwophaseflowviewpoint
Qiao Cheng; Ou Guoqiang; Pan Huali; Ouyang Chaojun; Jia Yang
2018
Source Publicationjournalofmountainscience
ISSN1672-6316
Volume15Issue:10Pages:2247
AbstractA catastrophic landslide occurred at Hongao dumpsite in Guangming New District of Shenzhen, South China, on December 20, 2015. An estimated total volume of 2.73x10(6) m(3) of construction spoils was mobilized during this event. The landslide traveled a long distance on a low-relief terrain. The affected area was approximately 1100 m in length and 630 m in width. This landslide made 33 buildings destroyed, 73 people died and 4 people lost. Due to the special dumping history and other factors, soil in this landfill is of high initial water content. To identify the major factors that attribute to the long runout character, a two-phase flow model of Iverson and George was used to simulate the dynamics of this landslide. The influence of initial hydraulic permeability, initial dilatancy, and earth pressure coefficient was examined through numerical simulations. We found that pore pressure has the most significant effect on the dynamic characteristics of Shenzhen landslides. Average pore pressure ratio of the whole basal surface was used to evaluate the degree of liquefaction for the sliding material. The evolution and influence factors of this ratio were analyzed based on the computational results. An exponential function was proposed to fit the evolution curve of the average pore pressure ratio, which can be used as a reasonable and simplified evaluation of the pore pressure. This fitting function can be utilized to improve the single-phase flow model.
Language英语
Funding Project[National Key R&D Program of China] ; [National Nature Science Foundation of China] ; [135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS] ; [Youth Innovation Promotion Association of the Chinese Academy of Sciences]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/31379
Collection山地灾害与地表过程重点实验室
Affiliation中国科学院成都山地灾害与环境研究所
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Qiao Cheng,Ou Guoqiang,Pan Huali,et al. longrunoutmechanismoftheshenzhen2015landslideinsightsfromatwophaseflowviewpoint[J]. journalofmountainscience,2018,15(10):2247.
APA Qiao Cheng,Ou Guoqiang,Pan Huali,Ouyang Chaojun,&Jia Yang.(2018).longrunoutmechanismoftheshenzhen2015landslideinsightsfromatwophaseflowviewpoint.journalofmountainscience,15(10),2247.
MLA Qiao Cheng,et al."longrunoutmechanismoftheshenzhen2015landslideinsightsfromatwophaseflowviewpoint".journalofmountainscience 15.10(2018):2247.
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