Research on particle size grading and slope stability analysis of super-high dumping site
WANG Guang-jin1,4,YANG Chun-he 1,2,ZHANG Chao2,MA Hong-ling2,KONG Xiang-yun3,HOU Ke-peng4(1.College of Resources and Environmental Science,Chongqing University,Chongqing 400044,China;2.State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China; 3.No.268 Brigade of Jiangxi Nuclear Industry Geological Bureau,Yushan,Jiangxi 334701,China;4.Faculty of Land Resources Engineeirng,Kunming University of Science and Technology,Kunming 650093,China)
Apparent particle size grading is the most important characteristic of super-high dumping site,which is different from soil slope.On the basis of the development of the HHC-CA model and on-site survey of granular size distribution,the slope model of current situation,considering the features of particle size grading,was established according to Xiyuanlin 413 step dumping site.FLAC3D was used to analyze the slope stability of current situation and various piling up patterns slope based on the slope model.The results indicated that the upper displacement vector,whose displacement direction maintained the same direction of the current situation slope of Xiyuanlin 413 step dumping site,performanced for subsidence.The middle displacement vectors showed shear and the displacement vector of bottom had slightly the trend of anti-lift.The slope failure model of current situation expressed in crack at the top platform and shearing out with a arc in the middle.This status of current situation slope was temporary steady stage.To adopt full overlay dump of multi-step,the displacement vector of dumping site slope showed subsidence at the top and transited to the horizontal direction at the bottom.The slope failure mode expressed in crack at the top platform and shearing out with a arc at the bottom.When considering the influence of strength characteristics of granular pile on the slope stability only,the particle size grading of super-high dumping site is helpful to slope stability.
【Fund】： 国家重点基础研究发展规划(973)(No.2009CB724602);; 国家杰出青年科学基金(No.E50725414);; 岩土力学与工程国家重点实验室开放课题(No.Z000607);岩土力学与工程国家重点实验室前言探索性项目(No.SKLQ003);; 重庆大学研究生科技创新基金(No.CDJXS11240007);重庆大学中央高校基本科研业务费(No.CDJZR10240001)
【CateGory Index】： TU43
【CateGory Index】： TU43