Evolution of particle crushing of carbonate sands under cyclic triaxial stress path

被引:0
作者
Wang G. [1 ,2 ]
Zha J.-J. [1 ,2 ]
Wei X. [3 ]
机构
[1] Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing
[2] School of Civil Engineering, Chongqing University, Chongqing
[3] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2019年 / 41卷 / 04期
关键词
Carbonate sand; Evolution law; Relative breakage index; Triaxial drained cyclic shear test;
D O I
10.11779/CJGE201904020
中图分类号
学科分类号
摘要
The carbonate sand is widely distributed in the South China Sea and used as the fill materials for land reclamation. Carbonate sand particles are fragile and can be easily crushed, making the carbonate sand exhibit distinctive mechanical behaviors compared with terrestrial silica sand. Triaxial cyclic shear tests under drained conditions are conducted on a carbonate sand taken from a reef in the South China Sea to investigate the evolution of particle crushing during cyclic shearing process. In the range of the adopted confining pressure, little particle crushing is observed in isotropic consolidation process. In contrast, remarkable particle crushing occurs during the following cyclic shearing process. Angular abrasion is the main form of particle crushing, leading to the increase of the fine particle content in the post-shearing grading. Along with the continuation of cyclic shearing, the amount of particle crushing increases continuously, but the increasing rate decreases gradually. For the cyclic shearing of constant amplitude under constant confining pressure, a logarithmic equation can be used to fit the curve of the relative breakage index versus the number of cycles. Based on with the observed influencing laws of confining pressure and cyclic stress ratio on particle crushing, a mathematical model is proposed to describe the evolution process of particle crushing during cyclic shearing process. © 2019, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
引用
收藏
页码:755 / 760
页数:5
相关论文
共 21 条
  • [1] Kjaernsli B., Sande A., Compressibility of some coarse grained materials, Proceedings of the 1st European Conference on Soil Mechanics and Foundation Engineering, 1, pp. 245-251, (1963)
  • [2] Hall E.B., Gordon B.B., Triaxial testing with large-scale high pressure equipment, Laboratory Shear Testing of Soils, 361, pp. 315-328, (1963)
  • [3] Chang J., Chen X.-M., Lu Y., Experiment on particle crush mechanism of Nanjing sand under high stress, Journal of Nanjing University of Technology (Natural Science Edition), 30, 4, pp. 88-92, (2008)
  • [4] Zhang J.-M., Jiang G.-S., Wang R., Research on influences of particle breakage and dilatancy on shear strength of calcareous sands, Rock and Soil Mechanics, 30, 7, pp. 2043-2048, (2009)
  • [5] Qadimi A., Coop M.R., The undrained cyclic behaviour of a carbonate sand, Géotechnique, 57, 9, pp. 739-750, (2007)
  • [6] Donohue S., O'Sullivan C., Long M., Particle breakage during cyclic triaxial loading of a carbonate sand, Géotechnique, 59, 5, pp. 477-482, (2009)
  • [7] Golightly C.R., Hyde A.F.L., Some fundamental properties of carbonates sands, Proceedings of the International Conference on Calcareous Sediments, 1, pp. 69-78, (1988)
  • [8] Hull T.S., Poulus H.G., Alehossein H., The static behavior of various calcareous sediments, Proceedings of the International Conference on Calcareous Sediments, (1988)
  • [9] Flynn W.L., A comparative study of cyclic loading responses and effects of cementation on liquefaction potential of calcareous and silica sands, (1997)
  • [10] Hyodo M., Hyde A.F.L., Aramaki N., Liquefaction of crushable soils, Géotechnique, 48, 4, pp. 527-543, (1998)