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Zeng Z.,University of Sichuan | Zhou C.,University of Sichuan | Wang L.-G.,Xinyi Water Resource Administrative Bureau of Jiangsu Province | Chen L.,Chengdu Shen Changcheng Real Estimate Co. | And 2 more authors.
Sichuan Daxue Xuebao (Gongcheng Kexue Ban)/Journal of Sichuan University (Engineering Science Edition) | Year: 2013

In order to improve the stability of slope, root-cable-gabion net flexible system was developed to control progressive deformation of slope. Mechanical and finite element analyses were performed on the root-cable-gabion net system adaptively stabilized slope. The results showed that due to the flexibility of gabion net retaining wall, root-cable-gabion net system can effectively limit and reduce the progressive deformation of slope and maintain the slope stable. Source


Liu J.,University of Sichuan | Zhou C.,University of Sichuan | Chen L.,Chengdu Shen Changcheng Real Estimate Co. | Wang L.-G.,Xinyi Water Resource Administrative Bureau of Jiangsu Province | And 2 more authors.
Sichuan Daxue Xuebao (Gongcheng Kexue Ban)/Journal of Sichuan University (Engineering Science Edition) | Year: 2013

Bingham model was introduced to predict the progressive deformation of root-reinforced soil slope. Nonlinear viscosity and root distribution along slope depth were taken into account in Bingham equation. Then an explicit expression was derived by simplifying the viscosity and root-reinforcement functions. The proposed formula based on Bingham model was applied to describe one typical creeping vegetated soil slope. The calculated results showed that shear layer can be easily emerged by the formula with fewer model parameters, and the reinforcement of root relies on their distribution depth, width and time-dependent deformation. Source


Zhou C.,University of Sichuan | Liu J.,University of Sichuan | Xing Y.-W.,Design and Investigation Institute of Nanjing City | Zhu H.-L.,Changzhou Waterway Administrative Bureau of Jiangsu Province | Rao Z.-G.,Changzhou Waterway Administrative Bureau of Jiangsu Province
Geotechnical Special Publication | Year: 2013

Waste tire mat-like geo-cells can be used as containers filled with soil and planted with vetiver grass. Waste tire and vetiver grass root reinforced soil are unxial and triaxial compressed to study the strength and deformation behavior. Test results indicate that tires and vetiver grass root can increase shear strength and improve ductility of soils. An in situ demonstration test is also conducted by waste tire mat filled with soil and vetiver grass in bioengineering stabilization of a fully weathered mud rock slope. Nonlinear viscosity of the slope soil is taken account into Bingham model that indicates the composite slope soil is fully or partially saturated. The concept of shear layer can be easily emerged by the formula without any assumption. As a result, the progressive deformation of the waste tire mat and vetiver grass root reinforced slope soil is described. © 2013 American Society of Civil Engineers. Source


Xie Z.,University of Sichuan | Zhu H.-L.,Changzhou Waterway Administrative Bureau of Jiangsu Province | Rao Z.-G.,Changzhou Waterway Administrative Bureau of Jiangsu Province | Zhang M.,Changzhou Waterway Administrative Bureau of Jiangsu Province | Zhou C.,University of Sichuan
Sichuan Daxue Xuebao (Gongcheng Kexue Ban)/Journal of Sichuan University (Engineering Science Edition) | Year: 2012

Element stress of slope soil was derived from stress equilibrium differential equations under the plane strain condition. The water-drop type yield surface function was modified with the consideration of soil reinforcement by roots. Visco-plasticity model was used between velocity and the visco-plastic strain of the slope soil. The explicit expression of the deformation rate with the depth of slope soil was thus derived. Simulation accuracy was improved by modifying the viscosity with the depth of slope soil. Finally, numerical example was given in comparison with the field measured data and a good agreement is achieved. Source


Liu J.,University of Sichuan | Zhou C.,University of Sichuan | Zhu H.L.,Changzhou Waterway Administrative Bureau of Jiangsu Province | Rao Z.G.,Changzhou Waterway Administrative Bureau of Jiangsu Province | And 2 more authors.
5th China-Japan Geotechnical Symposium | Year: 2013

Bingham model can describe the slow movement of natural soil slopes. To get more reasonable displacement of slow-moving landslides, more studies about Bingham model are conducted. The variety of nonlinear viscosity and mechanism of natural slopes are taken into account in this paper. The displacement equation can be derived by assuming that slope soil is fully or partially saturated. The proposed formula based on Bingham model is applied to describe one typical creeping soil slope. The concept of shear layer can be easily emerged by the formula without any assumption. Source

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