非饱和土与特殊土力学的理论与实践

对非饱和土与特殊土(包括填土、黄土、膨胀土、膨润土等)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、小型三轴仪、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、变形、强度、屈服、水量变化、细观结构演化、温度效应等许多重要力...

Mechanics Theories and Application of Unsaturated Soil and Special Soil

Researches on unsaturated soil and special soils are deeply and durably carried out,and a series of novel results are obtained.A lot of instruments and equipments suitable for unsaturated soil and special soils,such as odometer,direct shear apparatus,gas permeation device,small-sized and temperature-controlled as well as CT-triaxial apparatus,are successfully developed.Many important mechanical properties and laws on unsaturated soil and special soils,e.g.,water flow,air flow,deformation,strength,yield,moisture and meso-structure,are revealed.An axiomatic theoretical system of aeromechanics and stress state variables on unsaturated soil is constructed.Effective stress formulae for isotropic unsaturated soil and anisotropy porous media are proposed.The constitutive hierarchy including nonlinear model,elasto-plastic model,temperature-mechanical model and meso-structure damage model,are established.A 3D consolidation theory based on the theory of mixture and the hierarchy of consolidation model is set up,the software to solve 2D consolidation problems is programmed independently,and analytical solution of 1D problem and numerical solutions of 2D problems is got.Many trouble problems such as the deformation and stability of Xiaolangdi Dam are settled using above achievements.It indicates that the theories can guide engineering practice and be as the theoretical basis of engineering decision.