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非饱和土与特殊土力学的基本理论研究

陈正汉

陈正汉. 非饱和土与特殊土力学的基本理论研究[J]. 岩土工程学报, 2014, 36(2): 201-272. DOI: 10.11779/CJGE201402001
引用本文: 陈正汉. 非饱和土与特殊土力学的基本理论研究[J]. 岩土工程学报, 2014, 36(2): 201-272. DOI: 10.11779/CJGE201402001
shu
CHEN Zheng-han. On basic theories of unsaturated soils and special soils[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(2): 201-272. DOI: 10.11779/CJGE201402001
Citation: CHEN Zheng-han. On basic theories of unsaturated soils and special soils[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(2): 201-272. DOI: 10.11779/CJGE201402001
shu

非饱和土与特殊土力学的基本理论研究  English Version

  • 后勤工程学院建筑工程系,重庆 401311

基金项目: 国家自然科学基金项目（19272072,59279390,10372115,10672182,11072265,11272353）
详细信息
    作者简介:

    陈正汉(1947- )，男，教授，博士，博士生导师，长期从事非饱和土与特殊土力学的研究，在仪器研制、试验研究、理论建模和工程应用方面取得了系统的创造性成果。E-mail: chenzhenghan47@163.com。

  • 中图分类号: TU44

On basic theories of unsaturated soils and special soils

  • Department of Architecture & Civil Engineering, LEU, Chongqing 401311, China

摘要

    摘要
  • 摘要: 对非饱和土与特殊土开展了持久深入的研究,取得了系统的创造性成果：在国内率先研制成非饱和土固结仪、直剪仪、渗气仪、标准三轴仪、温控三轴仪、多功能三轴仪和土工CT-三轴仪等一系列仪器设备,揭示了非饱和土与特殊土的水气运动规律及变形、强度、屈服、水量变化、湿陷、湿胀、细观结构演化、温度效应等许多重要力学特性规律；构建了岩土力学的公理化理论体系与多种组合形式的非饱和土的应力状态变量；提出了各向异性多孔介质的有效应力理论公式与非饱和土的有效应力理论公式；建立了非饱和土、湿陷性黄土和膨胀土的本构模型谱系（包括非线性、弹塑性、结构性损伤与热力耦合模型）与分别考虑密度、净平均应力和偏应力影响的广义土-水特征曲线模型谱系；创立了非饱和土三维固结理论及其固结模型谱系；自主研发了分析固结问题的系列软件,求得一维固结问题的解析解和二维固结问题的数值解,形成了完整的理论体系。应用研究成果解决了多项工程的疑难问题,表明所建理论能够指导实践,为工程决策提供理论支持和科学依据。
    Abstract: Thorough researches on unsaturated soils and special soils including fill, collapsible loess, expansive soil, bentonite and sandy clay, are carried out, and a series of novel results are obtained. A lot of instruments and equipments suitable for unsaturated soils and special soils, such as oedometer, direct shear apparatus, gas permeation device, multifunction triaxial apparatus and temperature-controlled triaxial apparatus as well as CT-triaxial apparatus, are successfully developed. Important mechanical properties and laws of water flow, air flow, deformation, strength, yield, moisture and meso-structure of unsaturated soils and special soils are revealed. An axiomatics theoretical system of geomechanics and the stress state variables of unsaturated soils are established. The formulae for effective stresses isotropic unsaturated soils and anisotropic porous media are proposed. The constitutive hierarchy including nonlinear model, elasto-plastic model, coupled temperature-mechanical model and meso-structure damage model as well as the general model for soil-water characteristics curve are established. The 3-D consolidation theory based on the theory of mixture and the hierarchy of consolidation model are created, the relevant software to solve 2-D consolidation problems is programmed independently, and the analytical solutions to 1-D problems and the numerical solutions to 2-D problems are obtained. Many difficult problems such as deformation and stability of dams and embankments are solved using the above achievements. It is indicated that the proposed theories can be adopted to guide engineering practices and to be as the theoretical basis for engineering decision.
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    • 参考文献(146)
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  • 收稿日期:  2013-12-12
  • 发布日期:  2014-02-20

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