岩土力学 ›› 2019, Vol. 40 ›› Issue (6): 2275-2283.doi: 10.16285/j.rsm.2018.1160

• 基础理论与实验研究 • 上一篇    下一篇

钙质砂压缩波速与物理性质参数关系研究

谌 民1,张 涛2,单华刚3,王新志4,孟庆山4,余克服5   

  1. 1. 广西大学 土木建筑工程学院,广西 南宁530004;2. 海军后勤部军事设施建设局,北京100841;3. 绍兴市交通投资集团有限公司,浙江 绍兴,312000;4. 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,湖北 武汉 430071;5. 广西大学 海洋学院,广西 南宁 530004
  • 收稿日期:2018-09-03 出版日期:2019-06-11 发布日期:2019-06-22
  • 通讯作者: 王新志,男,1981年生,副研究员,主要从事珊瑚礁岩土力学特性方面的研究。E-mail: xzwang@whrsm.ac.cn E-mail: asd602579280@163.com
  • 作者简介:谌民,男,1993年生,硕士研究生,主要从事钙质砂土力学特性方面的研究
  • 基金资助:
    国家自然科学基金(No.41572297,No.41372316);中国科学院青年创新促进会(No.2015272);中国科学院战略性先导科技专项(A类)资助(XDA13010203)

Study of the relationship between compression wave velocity and physical properties of calcareous sand

CHEN Min1, ZHANG Tao2, SHAN Hua-gang3, WANG Xin-zhi4, MENG Qing-shan4, YU Ke-fu5   

  1. 1. College of Civil Engineering and Architecture, Guangxi University, Nanning, Guangxi 530004, China; 2. Military Installations Construction Bureau, PLA Navy Logistics Department, Beijing 100841, China; 3. Shaoxing Traffic Investment Group Co., Ltd., Shaoxing, Zhejiang 312000, China; 4. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 5. College of Ocean, Guangxi University, Nanning, Guangxi 530004, Chin
  • Received:2018-09-03 Online:2019-06-11 Published:2019-06-22
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41572297, 41372316), the Youth Innovation Promotion Association of Chinese Academy of Sciences (2015272) and the Strategic Priority Research Program of Chinese Academy of Sciences (XDA13010203).

摘要: 开展钙质砂纵波波速与物理性质参数关系的试验研究,对珊瑚礁地基无损检测及工程物探具有重要的理论指导意义和工程应用价值。控制试样的物性参数状态,利用制样装置进行波速测量,揭示钙质砂纵波波速与物性参数的相关关系。试验结果表明:含水率是影响纵波波速的主要因素,与纵波波速呈二次函数关系。CT扫描结果表明,试样粒径越大,颗粒内部孔隙越丰富,这导致试样孔隙比越大,波速故而越小,与粒径、孔隙比呈负相关关系。在密实度相同、不均匀系数不同时,级配良好的砂样纵波波速差异不大。经过侧限压缩后,含水率一定时,粉土纵波波速与孔隙比呈二次关系,且与密度呈良好的线性关系。利用粉土易压缩且与纵波波速紧密变化的特点,可积极探索声波在粉土地基密实度检测的工程应用。

关键词: 钙质砂, 压缩波速, 物理力学参数, 侧限压缩

Abstract: The experimental study on the relationship between P-wave velocity and physical parameters of calcareous sand has important theoretical guiding significance and engineering application value for non-destructive testing of calcareous soil foundation and geophysical exploration. By controlling the state of the tested specimens under different conditions, the P-wave velocity was measured to investigate the relationship between the P-wave velocity and physical parameters. Experimental results show that the water content is the main factor that affects the variation of compression wave velocity in a certain density range, and there is a quadratic curve relation between P-wave velocity and water content. Generally, the results of CT scanning show that the larger the particle size, the more abundant inner pores in the particles, which leads to the larger the void ratio and the smaller the P-wave velocity. The P-wave velocity has a negative correlation with particle size and pore ratio. When the density is fixed and uniformity coefficient is different, the compression wave velocity is basically the same in well-graded sand. After compression, a good quadratic relationship is established between P-wave velocity and void ratio under the constant water content. The P-wave velocity is linearly related with soil density. Therefore, the results can be applied to the nondestructive detection of calcareous soil foundation compactness.

Key words: calcareous sand, compression wave velocity, physical and mechanical properties, confined compression

中图分类号: 

  • TU449
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