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Xiong L.,Ningbo University | Yu L.,Zhejiang Geotechnical and Foundation Companay | Yang C.,Wuhan Surveying Geotechnical Research Institute Co
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2015

The shear creep curve of hard structural surface was analyzed by using generalized Kelvin model, Burgers model and six-component rheological model, respectively. The interface element in FLAC3D was improved. The shear rheological model and numerical analysis method of shear creep test of hard structural surface were put forward. The research result shows that the six-component viscoelastic shear rheological model is appropriate for analyzing the shear creep property of hard structural surface. The shear creep deformation increases with increasing slope ratio if the slope ratio is smaller than 45°, while the result will be quite on the contrary if the slope ratio is higher than 45°. In addition, the shear creep deformation will increase with increasing shear stress under fixed normal stress, and the shear creep deformation will decrease with increasing normal stress under fixed shear stress. ©, 2015, Academia Sinica. All right reserved. Source


Xiong L.,Ningbo University | Xiong L.,Chengdu University of Technology | Yu L.,Zhejiang Geotechnical and Foundation Company | Yang C.,Wuhan Surveying Geotechnical Research Institute Co | Li T.,Chengdu University of Technology
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2014

Take the interlayered rock mass composed of green schist and marble as subject of study, the numerical analysis of its mechancial characteristics under unloading condition was done by using FLAC3D. The research results show that the initial deviatoric stress has great effect on stress state and deformation when rock sample fails of confining pressure reduction test under constant axial stress. The stress increment ratio also has great effect on stress state and deformation when rock sample fails of confining pressure reduction test with increasing axial stress. The stress path has little effect on characteristics of strength and deformation of rock. The strength of interlayered rock mass is nearly not influenced by the stress path, but the deformation is significantly affected. ©, 2014, Academia Sinica. All right reserved. Source


Guo P.,Hohai University | Guo P.,Wuhan Surveying Geotechnical Research Institute Co | Lin S.,Yangtze River Scientific Research Institute
Applied Mechanics and Materials | Year: 2012

DDA(Discontinuous Deformation Analysis) was used to study the mechanical characteristics of coarse granular material (CGM). The numerical simulation model was found consulting the two Dimensional test of CGM,and the stress-strain curves obtained by the numerical simulation were basically in agreement with the results of laboratory test. It indicates that the numerical simulation is suitable for the mechanical characteristic research of CGM. In addition,the distribution statistic of several fabric elements about interaction between particles was also presented. Some relation between the stress-strain and fabric element change are found after analysis. © (2012) Trans Tech Publications, Switzerland. Source


Xiong L.,Ningbo University | Xiong L.,Chengdu University of Technology | Li T.,Chengdu University of Technology | Yang C.,Wuhan Surveying Geotechnical Research Institute Co | Yu L.,Zhejiang Geotechnical and Foundation Company
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2013

Taking the interlayered rock mass composed of greenschist and marble as study subject, numerical analysis on uniaxial and biaxial compression creep tests of interlayered rock mass was done by FLAC3D. Lots of influencing factors such as geometric relationship between loading direction and layer, volumetric content of marble interlayer and stress level were taken into account in the numerical analysis. The research results show that the absolute values of axial strain and strain in the incline direction of interlayer increased firstly and then decreased when the dip angle of interlayer increased from 0° to 90° under uniaxial and biaxial compression states. Axial compressive deformation and dilatant deformation in the two lateral directions decreased with the increased volumetric content of marble interlayer under uniaxial and biaxial compression states. The axial compressive deformation when axial loading orientation was perpendicular to bedding plane was larger than that when axial loading orientation was parallel to bedding plane under uniaxial compression. The axial compressive deformation was the largest when axial loading orientation was perpendicular to bedding plane and lateral loading orientation was parallel to bedding plane, and was the smallest when axial loading orientation was parallel to bedding plane and lateral loading orientation was perpendicular to bedding plane. Source


Guo P.,Hohai University | Guo P.,Wuhan Surveying Geotechnical Research Institute Co
Applied Mechanics and Materials | Year: 2012

The landslide which located in the northwest of the transformer substation was studied and the evaluation of the stability was contained.Through analyzing the regional geological conditions and landslide engineering conditions, summary of the reason of the landslide was made. Based on two-dimensional rigid body limit equilibrium theory, residual thrust method was used in calculation. Through the researching of the landslide, some factors that play important role were found. According to the investigation report, select the main slip profile as the basis for calculating. Combining with soil C&f, the value of the inversion parameters can be got. Calculation process contained two engineering conditions. In the natural condition, the landslide is stable, and in the rainstorm condition, the landslide is not stable. © (2012) Trans Tech Publications, Switzerland. Source

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