含钙质砂无黏性土的压缩特性及模型

马露; 于敏; 王钰轲

doi:10.13204/j.gyjzG20101008

含钙质砂无黏性土的压缩特性及模型

doi: 10.13204/j.gyjzG20101008

马露^1,2,
于敏¹,
王钰轲³

1. 安徽科技学院建筑学院, 安徽蚌埠 233100;
2. 河海大学岩土力学与堤坝工程教育部重点实验室, 南京 210098;
3. 郑州大学水利与环境学院, 郑州 450000

基金项目:

安徽省自然科学基金项目(2008085ME177)。

安徽省教育厅重点研究项目(KJ2019A0802,KJ2020A0080)

详细信息

作者简介:
马露,男,1988年出生,硕士,讲师。电子信箱:mal@ahstu.edu.cn

计量
- 文章访问数: 57
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- 被引次数: 0
出版历程
- 收稿日期: 2020-10-10
- 网络出版日期: 2022-03-29

COMPRESSION CHARACTERISTICS AND THE MODEL OF COHESIONLESS SOIL WITH CARBONATE SAND

MA Lu^1,2,
YU Min¹,
WANG Yuke³

1. Colloge of Architecture, Anhui Science and Technology University, Bengbu 233100, China;
2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
3. College of Water Conservancy and Environmental Engineering, Zhengzhou University, Zhengzhou 450000, China

摘要

摘要: 中国南海海底沉积物以含钙质砂的无黏性土为主,研究其压缩特性对工程安全具有重要意义。基于高压三轴仪试验系统,开展了钙质砂含量、初始孔隙比和有效应力对无黏性土压缩特性的影响试验。结果表明:在相同有效应力下,钙质砂含量的增加会提高无黏性土的压缩性;钙质砂含量超过60%时,不同初始孔隙比的试样在高有效应力区,压缩曲线会收敛。基于以上研究,提出了可描述含钙质砂无黏性土压缩特性的数学模型,应用于不同砂性土时,模型表现出较好的预测效果;与已有压缩模型的对比,验证了模型的优越性。
- 钙质砂 /
- 无黏性土 /
- 等向压缩模型
Abstract: The seafloor sediments in the South China Sea are mainly composed of cohesionless soil with calcareous sand. It is of great significance to study the compression characteristics of cohesionless soil with calcareous sand for engineering safety. Based on the high-pressure triaxial test system, the effects of the calcareous sand content, initial void ratio and effective stress on the compression characteristics of cohesionless soil were studied. The results showed that the increase of the calcareous sand content could improve the compressibility of cohesionless soil under the same effective stress; when the calcareous sand content exceeded 60%, the compression curves of soil specimens in different initial void ratios would converge in the high effective stress region. Based on the above conclusion, a mathematical model was proposed to describe the compression characteristics of cohesionless soil with calcareous sand. The model showed good prediction effect in different sandy soils. Compared with the existing compression model, the superiority of the model was verified.
- calcareous sand /
- cohesionless soil /
- isotropic compression model

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参考文献(11)

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