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Study on one—dimensional consolidation of saturated soil with semi—pervious boundaries and under cyclic loading

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Journal of Zhejiang University Science 2002年第5期3卷 513-519页

作者：梁旭蔡袁强等 DepartmentofCivilEngineering ZhejiangUniversityHangzhou310027China

The variation of effective stress ratio of stratfied soil with semi pervious boundaries and under cyclic loading was analyzed on the basis of Terzaghi's one dimensional consolidation assumptions. A solution by Laplace Transform was obtained for the case when the soil was under time varied loading. With numerical inversion of Laplace Transform, some useful results were obtained for several kinds of commonly encountered loadings. The results can be meaningful in engineering practice.

关键词： Semi pervious boundaries saturated soil Cyclic loading One dimensional consolidation Laplace transform Effective stress ratio

VERTICAL VIBRATION ANALYSIS OF AXISYMMETRIC saturated soil

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Applied Mathematics and Mechanics(English Edition) 2006年第1期27卷 83-89页

作者：蔡袁强徐长节郑灶锋吴大志 Institute of Geotechnical Engineering

Based on Biot＇s dynamic consolidation equations, by means of Laplace-Hankel transform technology, the integral solutions of stress and displacement in saturated soil with subjacent rock-stratum under axisymmetric arbitrary excitations were derived. Influence of the reflected wave generated by the boundary was revealed. Numerical results indicate that the vibration frequency has some effect on the vertical displacement of satu rated soil. The vertical displacement at the surface of saturated soil lags in phase with the load. Furthermore, the dynamic permeability coefficient of saturated soil has significant effect on the vertical displacement at the initial stage of load applied, but when the load becomes stable, the effect is inapparent.

关键词： vertical vibration analysis arbitrary excitation saturated soil

Scattering wave field around a cavity with circular cross-section embedded in saturated soil using boundary element method

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Journal of Central South University 2013年第11期20卷 3296-3304页

作者：张鸿高谦徐斌 School of Civil and Environmental Engineering University of Science and Technology Beijing School of Civil Engineering and Architecture Nanchang Institute of Technology

Based on Biot’s theory and considering the properties of a cavity,the boundary integral equations for the numerical simulation of wave scattering around a cavity with a circular cross-section embedded in saturated soil are obtained using integral transform *** Cauchy type singularity of the boundary integral equation is *** effectiveness of the properties of soil mass and incident field on the dynamic stress concentration and pore pressure concentration around a cavity is *** results are in good agreement with the existing *** numerical results of this work show that the dynamic stress concentration and pore pressure concentration are influenced by the degree of fluid–solid coupling as well as the pore compressibility and water permeability of saturated *** increased degree of fluid–solid coupling,the dynamic stress concentration improves from 1.87 to 3.42 and the scattering becomes more *** decreased index of soil mass compressibility,the dynamic stress concentration increases and its maximum reaches *** dynamic stress concentration increases from 1.64 to 3.49 and pore pressure concentration improves from 0.18 to 0.46 with decreased water permeability of saturated soil.

关键词： saturated soil boundary integral equations wave scattering dynamic stress concentration Green's function

Influence and evaluation of saturated soil shield construction on existing highway

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Transportation Safety and Environment 2021年第1期3卷 72-83页

作者： Liuqi Xu Chongfu Wu Liwei Wang Shuangjun Xu Yanshan University Key Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering of Hebei ProvinceQinhuangdao 066004China Hebei Normal University of Science&Technology Qinhuangdao 066004China

In order to study the shield construction under an existing highway,the initial displacement and the excess pore water pressure solution from Biot consolidation equation were used to derive the analytical solutions of the vertical deformation and pore water pressure of saturated soil caused by the frontal friction and side friction of the *** addition,by introducing the layered method and combining it with other theoretical analytical equations,the expressions of total vertical deformation and total pore water pressure caused by tunnel excavation with different overlying materials were *** simulation results on an engineering project showed that the angleαbetween the direction of the road and the propulsion axis of the shield had a significant influence on the surface settlement of the *** the angleαwas increased,the settlement curve had higher variation;but the variation would not exceed the maximum settlement value above the shield *** the road was perpendicular to the shield axis,a critical point of the road bulging and settlement was formed above the *** to the grinding resistance of the cutterhead,the pore water pressure under the roadbed was distributed asymmetrically on both sides of the shield axis.

关键词： shield construction saturated soil vertical deformation excess pore pressure tunnel engineering

Study on one-dimensional consolidation of saturated soil with semi-pervious boundaries and under cyclic loading

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2002年第5期 14-20页

作者：梁旭蔡袁强吴世明

The variation of effective stress ratio of stratfied soil with semi pervious boundaries and under cyclic loading was analyzed on the basis of Terzaghi’s one dimensional consolidation assumptions. A solution by Laplace Transform was obtained for the case when the soil was under time varied loading. With numerical inversion of Laplace Transform, some useful results were obtained for several kinds of commonly encountered loadings. The results can be meaningful in engineering practice.

关键词： Semi pervious boundaries saturated soil Cyclic loading One dimensional consolidation Laplace transform Effective stress ratio

Solution of a rigid disk on saturated soil considering consolidation and rheology

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第3期6卷 222-228页

作者：高绍武王建华周香莲 Department of Civil Engineering Shanghai Jiaotong University Shanghai 200030 China

The problem of a rigid disk acting with normal force on saturated soil was studied using Biot consolidation theory and integral equation method and the Merchant model to describe the saturated soil rheology. Using integral transform techniques, general solutions of Biot consolidation functions and the dual integral equations of a rigid disk on saturated soil were established based on the boundary conditions. These equations can be simplified using Laplace-Hankel and Abel transform methods. The numerical solutions of the integral equations, and the corresponding inversion transform were used to obtain the settlement and contact stresses of the rigid disk. Numerical examples showed that the soil settlement is small if only consolidation is considered, so the soil rheology must be taken into account to calculate the soil settlement. Numerical solution of Hankel inverse transform is also given in this paper.

关键词： saturated soil Rigid disk Biot consolidation theory Hankel transform Rheology

Development of the Shear Bandsin saturated soil

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Advances in Manufacturing 1999年第3期3卷 199-202页

作者： LU Xiao bing YANG Zhen sheng (Institute of Mechanics,Chinese Academy of Sciences) Institute of Mechanics Chinese Academy of Sciences Beijing China

This paper describes the development of shear bands in saturated soil under simple shear using a matching technique at the moving boundary of a shear band, and it is shown that the development of shear bands is affect... 详细信息

关键词： shear bands saturated soil matching technique

Shear Instability of saturated soil Considering the Gradients of Strain and Pore Pressure

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Journal of Shanghai University(English Edition) 2003年第2期7卷 138-142页

作者：鲁晓兵崔鹏 InstituteofMechanics ChineseAcademyofSciences InstituteofEnvironmentandMountainHazard

The dynamic instability of saturated soil considering the gradients of strain and pore pressure was discussed in this *** inertia and the drainage effects were considered and the Perturbation method was *** is shown t... 详细信息

关键词： saturated soil instability gradient.

Numerical Simulation on Freezing Process of saturated Granular soil

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Journal of Southwest Jiaotong University(English Edition) 2007年第4期15卷 311-318页

作者：曹宏章刘石 Institute of Engineering Thermophysics Chinese Academy of Sciences Graduate School Chinese Academy of Sciences Beijing 100080 China

The relation between ice pressure and load as a criterion of segregated ice initiation is introduced into the rigid ice model to simulate frost heave in saturated and granular soil. The calculated results show that unfrozen water content, thermal conductivity and hydraulic conductivity change greatly in frozen fringe. In numerical simulations, the influence of load, hydraulic conductivity and property of soil containing water on the process of soil freezing are analyzed, and the simulation curves such as cumulative heave, the change of depth of frozen and the distributions of water content are similar to the observations reported elsewhere.

关键词： saturated soil Frozen heave Rigid ice model Simulation