河北水利电力学院学报

河北水利电力学院学报 ›› 2021, Vol. 31 ›› Issue (3): 58-61.DOI: 10.16046/j.cnki.issn2096-5680.2021.03.011

• 技术理论与应用 • 上一篇    下一篇

水泥稳定路基土力学特性研究

丁鹏飞1, 张振寰2   

  1. 1.张家口翰得交通公路勘察设计有限责任公司,河北省张家口市桥东区东建街14号 075000;
    2.河北建筑工程学院,河北省张家口市桥东区朝阳西大街13号 075000
  • 收稿日期:2020-12-03 修回日期:2020-12-07 出版日期:2021-09-30 发布日期:2021-11-19
  • 通讯作者: 张振寰(1994-),男,河北张家口人,在读硕士研究生,主要研究方向为特殊土力学性质研究。E-mail:435415231@qq.com
  • 作者简介:丁鹏飞(1982-),男,河南襄城人,高级工程师,主要从事公路规划设计工作。E-mail:dpf12345@qq.com
  • 基金资助:
    张家口市交通局科技研发项目“建筑垃圾混凝土再生骨料在沥青混合料中的应用研究”(202002)

Research on Mechanical Properties of Cement Stabilized Roadbed Soil

DING Peng-fei1, ZHANG Zhen-huan2   

  1. 1. Zhangjiakou Hande Traffic Highway Survey and Design Co., Ltd.,075000, Zhangjiakou, Hebei, China;
    2. Hebei Institute of Civil Engineering, 075000, Zhangjiakou, Hebei, China
  • Received:2020-12-03 Revised:2020-12-07 Online:2021-09-30 Published:2021-11-19

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摘要： 为探究稳定固化路基土的强度受水泥掺量和围压的影响程度,通过室内无侧限抗压强度试验与三轴压缩试验,得到水泥稳定路基土的单轴抗压强度、黏聚力、内摩擦角等力学参数和各因素对水泥稳定路基土力学性质变化规律的影响。采用回归分析法研究了无侧限抗压强度和稳定剂的相关性,给出了抗压强度与水泥掺量的拟合公式用于预测水泥的合理掺量范围。结果表明:水泥稳定路基土在一定水泥掺量范围内,随水泥掺量的增加,无侧限抗压强度、剪切应力、残余强度均增大,黏聚力先显著增大后略微下降,内摩擦角上下略微波动;剪切峰值应力与残余强度随围压增大显著增大。

关键词: 道路工程, 水泥稳定土, 无侧限抗压强度, 三轴压缩试验, 回归分析

Abstract: In order to explore the influence of cement content and confining pressure on the strength of stabilized subgrade soil, the influence of uniaxial compressive strength, cohesion, internal friction angle and other mechanical parameters on the mechanical properties of cement stabilized subgrade soil is obtained through the indoor unconfined compressive strength test and triaxial compression test. The correlation between unconfined compressive strength and stabilizer is studied by regression analysis. The fitting formula of compressive strength and cement content is given to predict the reasonable range of cement content. The results show that the unconfined compressive strength, shear stress and residual strength increase with the increase of cement content, the cohesion first increases and then decreases slightly, and the internal friction angle moves up and down slightly. The shear peak stress and residual strength increased with the increase of confining pressure.

Key words: road engineering, cement stabilized soil, unconfined compressive strength, triaxial compression test, regression analysis

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