土工基础

›› 2019, Vol. 33 ›› Issue (3): 295-298.

• 工程实录 • 上一篇    下一篇

三轴试验条件下钙质砂颗粒破碎影响因素研究

翁贻令1，殷 娟1，陈伟俊1，余克服2，王新志3   

  1. （1.广西大学土木建筑工程学院,南宁 530004；2.广西大学海洋学院，南宁 530004；
    3.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071）
  • 收稿日期:2017-03-07 修回日期:2018-08-29 出版日期:2019-06-20 发布日期:2019-08-16
  • 作者简介:翁贻令（1991-），男，硕士研究生，研究方向为岩土力学与工程方面的相关研究。
  • 基金资助:

    中科院战略性先导科技专项子课题（XDA13010203）；自然科学基金项目（No.41572297）和国家科技支撑计划项目（2014BAC01B01）〖JP〗

Influencing Factors for Particle Breakage of the Calcareous Sand under Triaxial Tests

WENG Yiling1, YIN Juan1, CHEN Weijun1, YU Kefu2, WANG Xinzhi3   

  1. (1.College of Civil Engineering & Architecture, Guangxi University, Nanning 530004
    2.College of Marine Sciences, Guangxi University, Nanning 530004
    3.Institute of Rock and Soil mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2017-03-07 Revised:2018-08-29 Online:2019-06-20 Published:2019-08-16

摘要： 针对钙质砂颗粒易破碎的特点，对取自南海某礁的钙质砂进行大量三轴试验，研究钙质砂在不同围压、粒径、级配、密实度、排水条件和含水率条件下的颗粒破碎情况，分析以上因素对钙质砂颗粒破碎的影响。试验结果表明：钙质砂颗粒破碎受围压影响显著，与粒径并没有明显相关性；级配越好的钙质砂破碎越小；密实度增大会导致颗粒破碎加剧；不同排水条件下钙质砂颗粒破碎受有效围压影响；颗粒破碎随含水率增加而变大。

关键词: 钙质砂, 颗粒破碎, 级配, 密实度, 三轴试验

Abstract: Extensive triaxial tests were performed on calcareous sand samples from coral reefs in South China Sea to study the properties of particle breakage. Factors that might affect the particle breakage, such as, confining pressure, sample grain size, sample gradation, degree of compaction, drainage condition and initial sample moisture content, were studied. The following conclusions can be obtained: the particle breakage of the calcareous samples is related to the magnitude of confining pressure and does not have relationship with the sample grain size. Well graded samples have less amount of particle breakage; higher degree of compaction increases the amount of particle breakage; under different drainage conditions in the triaxial tests, the effective confining pressure has a large influence; the particle breakage increases with the initial moisture content of samples.

Key words: Calcareous Sands, Particle Breakage, Gradations, Degree of Compaction, Triaxial Tests