土工基础 ›› 2023, Vol. 37 ›› Issue (1): 134-137.

• 测试技术 • 上一篇    下一篇

不同土石掺配比例对土石混合料的力学及渗透特性影响试验研究

耿传浩1,2,郑 星1,2,杨文超1,2,魏伟琼1,2   

  1. (1.中国电建集团贵阳勘测设计研究院有限公司,贵阳 550081;2.贵州省岩土力学与工程安全重点实验室,贵阳 550081)
  • 收稿日期:2021-07-15 修回日期:2021-07-20 出版日期:2023-02-24 发布日期:2023-03-08
  • 作者简介:耿传浩(1990-),男,工程师,研究方向为岩土试验。

Experimental Study on Mechanical and Permeability Characteristics of Soil Rock Mixture with Different Mixing Ratios

GENG Chuanhao1,2, ZHENG Xing1,2, YANG Wenchao1,2, WEI Weiqiong1,2   

  1. (1.Power China Guiyang Engineering Co. Ltd., Guiyang 550081;
    2.Guizhou Provincial Key Laboratory for Geomechanics and Engineering Safety, Guiyang 550081)
  • Received:2021-07-15 Revised:2021-07-20 Online:2023-02-24 Published:2023-03-08

摘要: 将细粒土与碎石含不同比例掺配后进行了击实试验及击实后的力学、渗透试验,随着土石掺配比的增加,土石混合料的最大干密度将随着增加,最优含水率随之减小。在击实状态下,随着砾石掺配比的增加,土石混合料的抗剪强度增加,压缩压缩模量增大,渗透性有所增加。混合料出现上述工程特性的原因是随着土体中砾石含量的增加,土中的砾石颗粒逐渐形成骨架,细粒土填充在骨架中,所形成的土体结构在受剪时颗粒之间相互接触、咬合嵌套,增强了抗剪强度,降低了压缩性,同时由于土体中形成了更多的空隙,渗透性有所增加。


关键词: 土石混合料, 掺配比, 力学特性, 渗透特性, 试验

Abstract: The compaction, mechanical and permeability tests are conducted after the fine-grained soil and crushed stone are mixed with different mixing ratios. With the increase of the gravel content, the maximum dry density of soil rock mixture increases and the optimal moisture content decreases. After the compaction, with the increase of rock content, the shear strength, the compression modulus, and the permeability of soil rock mixture increases. The reason for the above engineering characteristics of mixture is that with the increase of gravel content in the soil, gravel particles in the soil gradually form a skeleton, and fine-grained soil is filled in the skeleton. The formed soil structure contacts and occludes with each other during the shearing process, which enhances the shear strength and reduces the compressibility. At the same time, more voids are formed in the soil, the permeability increases.

Key words: Soil Rock Mixture, Mixing Ratios, Mechanical Property, Permeability Property, Experimental Study

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