raybet体育在线 院报 ›› 2025, Vol. 42 ›› Issue (5): 165-173.DOI: 10.11988/ckyyb.20240144

• 岩土工程 • 上一篇    下一篇

武汉长江一级阶地土体硬化模型参数试验研究

李光诚1(), 邵勇1(), 伊盼盼2, 王璐1, 陈明1, 马路寒3   

  1. 1 湖北省城市地质工程院,武汉 430050
    2 中国科学院武汉岩土力学研究所,武汉 430071
    3 武汉中隧轨道交通工程技术有限公司,武汉 430080
  • 收稿日期:2024-02-21 修回日期:2024-04-01 出版日期:2025-05-01 发布日期:2025-05-01
  • 通信作者:
    邵 勇(1989-),男,湖北武汉人,高级工程师,硕士,主要从事环境岩土、环境地质、环境污染防治工作。E-mail:
  • 作者简介:

    李光诚(1971-),男,湖北武汉人,正高级工程师,硕士,主要从事岩土工程工作。E-mail:

  • 基金资助:
    国家自然科学基金项目(12002243); 湖北省地质局科技项目(KJ2023-46); 湖北省教育厅科学研究计划项目(B2020254)

Experimental Study on Soil Hardening Model Parameters of First-stage Terrace of Yangtze River in Wuhan

LI Guang-cheng1(), SHAO Yong1(), Yi Pan-pan2, WANG Lu1, CHEN Ming1, MA Lu-han3   

  1. 1 Hubei Institute of Urban Geological Engineering,Wuhan 430050,China
    2 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
    3 Wuhan Tunnel Rail Transit Engineering Technology Co., Ltd., Wuhan 430080,China
  • Received:2024-02-21 Revised:2024-04-01 Published:2025-05-01 Online:2025-05-01

摘要:

为系统获取土层变形有限元数值模拟所需的土体力学参数,以武汉长江一级阶地“上黏下砂”典型二元结构土层(粉质黏土、粉土、粉砂和细砂)为研究对象,通过系统的物理性质试验、固结试验及三轴固结排水加载-卸载-再加载试验,测定土体的修正摩尔-库伦硬化模型关键参数( E o e d r e f E 50 r e f E u r r e fc'、φ'、Rf)。基于试验数据,结合国内其他地区的试验结果与经验值,系统分析武汉长江一级阶地典型土层模量参数间的定量关系,并提出参数取值的建议。研究成果补充了《湖北省基坑工程技术规程》中黏性土与粉土的有效应力强度指标,修正了砂土参数的工程取值(如砂土 c' 的非零特性)。该研究不仅为长江一级阶地类似工程提供了直接参数依据,还可为岩土工程有限元分析参数反演、参数敏感性分析及工程适应性校正提供重要参考。

关键词: 基坑工程, 硬化模型参数, 数值模拟, 修正摩尔-库伦, 长江一级阶地

Abstract:

A series of physical property tests, consolidation tests, and unloading-reloading tests were conducted on undisturbed soil samples of silty clay, silt, and fine sand from the first-stage terrace of Yangtze River in Wuhan. The indoor experimental values of modified Mohr-Coulomb model parameters, including E o e d r e f, E 50 r e f, E u r r e f,c',φ',and Rf for typical soil layers with upper clay layer and lower sand layer in this terrace, were directly acquired. Using experimental data, adjusted experimental data, and empirical data from other regions in China, the relationships among different modulus parameters of typical soil layers in this region were analyzed. Moreover, the effective strength indexes were compared with the current provincial standard specification. The parameters obtained from this experimental study can be comprehensively selected and applied in areas with similar engineering geological background conditions. Additionally, they can offer valuable references for geotechnical engineering finite element parameter inversion analysis, parameter sensitivity analysis, and parameter applicability correction, which are based on the finite - element modeling experience of actual foundation pit engineering and the monitoring data of foundation pit engineering examples.

Key words: foundation pit engineering, hardening model parameters, numerical simulation, modified Mohr-Coulomb, first-stage terrace of Yangtze River

中图分类号: 

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