›› 2011, Vol. 32 ›› Issue (4): 1069-1076.

• Geotechnical Engineering • Previous Articles     Next Articles

Research on early warning criterion of landslides using case-based reasoning

LI Cong1, 2，JIANG Qing-hui1, 2，ZHOU Chuang-bing1, 2，ZHOU Zhong3，SONG Sheng-wu3，GONG Man-fu3   

  1. 1. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China; 2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 3. Chengdu Hydroelectric Investigation and Design Institute, China Hydropower Engineering Consulting Group Coporation, Chengdu 610072, China
  • Received:2010-07-19 Online:2011-04-10 Published:2011-04-29

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Abstract:

In order to study the early warning index of landslide, a landslide database composed of 31 typical rock landslides is established; and based on the database a landslide case-based reasoning system is developed using engineering analogy and fuzzy comprehensive assessment model. The feature attribute of landslide is divided into 6 items, including failure mode, dip angle of slip plane, slip-zone type, rock mass structure, slope angle, inducing factors in landslide (rainfall, groundwater, reservoir impoundment, excavation, blasting and seismic peak acceleration), whereupon the characteristics of properties of slope is represented by 11 eigenvalues. The most similar slopes are searched from the database using theory of similarity based on ratio method; and the suggested warning criterion is given based on engineering analogy; and then revised criterion is get based on fuzzy comprehensive assessment model. Taking JinpingⅠhydropower station for example, five landslides that are most similar with the slope at left bank of JinpingⅠhydropower station are got. Anjialing open-pit mine landslide and landslide in eastern open pit in Daye among the result have intact deformation monitoring data, so in terms of four periods the early warning criterion of the slope at left bank of JinpingⅠhydropower station is given, based on deep analysis of deformation and failure process of the similar slopes. A fuzzy comprehensive assessment model is established to revise the criterion mentioned above; and exact interval of (1, 1.2) mm/d is given which determines the displacement rate threshold when the slope at left bank of JinpingⅠhydropower station develops into the accelerated deformation stage.

Key words: landslide, early warning criterion, case-based reasoning, JinpingⅠhydropower station

CLC Number: 

  • P 642.2
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