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| 1 | Modeling of coupled deformation,water flow and gas transport in soil slopes subjected to rain infiltration显示文摘Rain infiltration into a soil slope leads to propagation of the wetting front, transport of air in pores and deformation of the soils, in which coupled processes among the solid, liquid and gas phases are typically involved. Most previous studies on the unsaturated flow and its influence on slope stability were based on the singlephase water flow model (i.e., the Richards Equation) or the waterair two-phase flow model. The effects of gas transport and soil deformation on the movement of groundwater and the evolution of slope stability were less examined with a coupled solid-water-air model. In this paper, a numerical model was established based on the principles of the continuum mechanics and the averaging approach of the mixture theory and implemented in an FEM code for analysis of the coupled deformation, water flow and gas transport in porous media. The proposed model and the computer code were validated by the Liakopoulos drainage test over a sand column, and the significant effect of the lateral air boundary condition on the draining process of water was discussed. On this basis, the coupled processes of groundwater flow, gas transport and soil deformation in a homogeneous soil slope under a long heavy rainfall were simulated with the proposed three-phase model, and the numerical results revealed the remarkable delaying effects of gas transport and soil deformation on the propagation of the wetting front and the evolution of the slope stability. The results may provide a helpful reference for hazard assessment and control of rainfall-induced landslides. | HU Ran CHEN YiFeng ZHOU ChuangBing | 2011 | Science China(Technological Sciences)2011，54，10： | 19 |
| 2 | A new variational inequality formulation for unconfined seepage flow through fracture networks显示文摘Darcy's law only applying to the flow domain is extended to the entire fracture network domain including the dry domain.The partial differential equation(PDE) formulation for unconfined seepage flow problems for discrete fracture network is established,in which a boundary condition of Signorini's type is prescribed over the potential seepage surfaces.In order to reduce the difficulty in selecting trial functions,a new variational inequality formulation is presented and mathematically proved to be equivalent to the PDE formulation.The numerical procedure based on the VI formulation is proposed and the corresponding algorithm has been developed.Since a continuous penalized Heaviside function is introduced to replace a jump function in finite element analysis,oscillation of numerical integration for facture elements cut by the free surface is eliminated and stability of numerical solution is assured.The numerical results from two typical examples demonstrate,on the one hand the effectiveness and robustness of the proposed method,and on the other hand the capability of predicting main seepage pathways in fractured rocks and flow rates out of the drainage system,which is very important for performance assessments and design optimization of complex drainage system. | JIANG QingHui YE ZuYang YAO Chi ZHOU ChuangBing | 2012 | Science China(Technological Sciences)2012，55，11： | 11 |
| 3 | A new classification of seepage control mechanisms in geotechnical engineering显示文摘Seepage flow through soils,rocks and geotechnical structures has a great influence on their stabilities and performances,and seepage control is a critical technological issue in engineering practices.The physical mechanisms associated with various engineering measures for seepage control are investigated from a new perspective within the framework of continuum mechanics;and an equation-based classification of seepage control mechanisms is proposed according to their roles in the mathematical models for seepage flow,including control mechanisms by coupled processes,initial states,boundary conditions and hydraulic properties.The effects of each mechanism on seepage control are illustrated with examples in hydroelectric engineering and radioactive waste disposal,and hence the reasonability of classification is demonstrated.Advice on performance assessment and optimization design of the seepage control systems in geotechnical engineering is provided,and the suggested procedure would serve as a useful guidance for cost-effective control of seepage flow in various engineering practices. | Yifeng Chen Ran Hu Chuangbing Zhou Dianqing Li Guan Rong Qinghui Jiang | 2010 | Journal of Rock Mechanics and Geotechnical Engineering2010，2，3： | 10 |
| 4 | Uncertainty analysis of correlated non-normal geotechnical parameters using Gaussian copula显示文摘Determining the joint probability distribution of correlated non-normal geotechnical parameters based on incomplete statistical data is a challenging problem.This paper proposes a Gaussian copula-based method for modelling the joint probability distribution of bivariate uncertain data.First,the concepts of Pearson and Kendall correlation coefficients are presented,and the copula theory is briefly introduced.Thereafter,a Pearson method and a Kendall method are developed to determine the copula parameter underlying Gaussian copula.Second,these two methods are compared in computational efficiency,applicability,and capability of fitting data.Finally,four load-test datasets of load-displacement curves of piles are used to illustrate the proposed method.The results indicate that the proposed Gaussian copula-based method can not only characterize the correlation between geotechnical parameters,but also construct the joint probability distribution function of correlated non-normal geotechnical parameters in a more general way.It can serve as a general tool to construct the joint probability distribution of correlated geotechnical parameters based on incomplete data.The Gaussian copula using the Kendall method is superior to that using the Pearson method,which should be recommended for modelling and simulating the joint probability distribution of correlated geotechnical parameters.There exists a strong negative correlation between the two parameters underlying load-displacement curves.Neglecting such correlation will not capture the scatter in the measured load-displacement curves.These results substantially extend the application of the copula theory to multivariate simulation in geotechnical engineering. | LI DianQing TANG XiaoSong ZHOU ChuangBing PHOON Kok-Kwang | 2012 | Science China(Technological Sciences)2012，55，11： | 10 |
| 5 | Characterization of transient groundwater flow through a high arch dam foundation during reservoir impounding显示文摘Even though a large number of large-scale arch dams with height larger than 200 m have been built in the world, the transient groundwater flow behaviors and the seepage control effects in the dam foundations under difficult geological conditions are rarely reported. This paper presents a case study on the transient groundwater flow behaviors in the rock foundation of Jinping I double-curvature arch dam, the world's highest dam of this type to date that has been completed. Taking into account the geological settings at the site, an inverse modeling technique utilizing the time series measurements of both hydraulic head and discharge was adopted to back-calculate the permeability of the foundation rocks,which effectively improves the uniqueness and reliability of the inverse modeling results. The transient seepage flow in the dam foundation during the reservoir impounding was then modeled with a parabolic variational inequality(PVI) method. The distribution of pore water pressure, the amount of leakage, and the performance of the seepage control system in the dam foundation during the entire impounding process were finally illustrated with the numerical results. | Yifeng Chen Jiamin Hong Shaolong Tang Chuangbing Zhou | 2016 | Journal of Rock Mechanics and Geotechnical Engineering2016，8，4： | 6 |
| 6 | A generalized multi-field coupling approach and its application to stability and deformation control of a high slope显示文摘Human activities,such as blasting excavation,bolting,grouting and impounding of reservoirs,will lead to disturbances to rock masses and variations in their structural features and material properties.These engineering disturbances are important factors that would alter the natural evolutionary processes or change the multi-field interactions in the rock masses from their initial equilibrium states.The concept of generalized multi-field couplings was proposed by placing particular emphasis on the role of engineering disturbances in traditional multi-field couplings in rock masses.A mathematical model was then developed,in which the effects of engineering disturbances on the coupling-processes were described with changes in boundary conditions and evolutions in thermo-hydro-mechanical(THM) properties of the rocks.A parameter,d,which is similar to damage variables but has a broader physical meaning,was conceptually introduced to represent the degree of engineering disturbances and the couplings among the material properties.The effects of blasting excavation,bolting and grouting in rock engineering were illustrated with various field observations or theoretical results,on which the degree of disturbances and the variations in elastic moduli and permeabilities were particularly focused.The influences of excavation and groundwater drainage on the seepage flow and stability of the slopes were demonstrated with numerical simulations.The proposed approach was further employed to investigate the coupled hydro-mechanical responses of a high rock slope to excavation,bolting and impounding of the reservoir in the dam left abutment of Jinping I hydropower station.The impacts of engineering disturbances on the deformation and stability of the slope during construction and operation were demonstrated. | Chuangbing Zhou Yifeng Chen Qinghui Jiang Wenbo Lu | 2011 | Journal of Rock Mechanics and Geotechnical Engineering2011，3，3： | 5 |
| 7 | A new constitutive law for the nonlinear normal deformation of rock joints under normal load显示文摘In view of the deviation of the fitting results of the classical exponential model and the hyperbolic model(the BB model) from several experiment data during intermediate stress period,a new constitutive model for the nonlinear normal deformation of rock joints under normal monotonous load is established with flexibility-deformation method.First of all,basic laws of the deformation of joints under normal monotonous load are discussed,based on which three basic conditions which the complete constitutive equation for rock joints under normal load should meet are put forward.The analysis of the modified normal constitutive model on stress-deformation curve shows that the general exponential model and the improved hyperbolic model are not complete in math theory.Flexibility-deformation monotone decreasing curve lying between flexibility-deformation curve of the classical exponential model and the BB model is chosen,which meets basic conditions of normal deformation mentioned before,then a new normal deformation constitutive model of rock joints containing three parameters is established.Two main forms of flexibility-deformation curve are analyzed and specific math formulas of the two forms are deduced.Then the range of the parameters in the g-ζmodel and the g-ζ model and the correlative influence factor in geology are preliminarily discussed.Referring to different experiment data,the validating analysis of the g-ζ model and the g-ζ model shows that the g-ζ model can be applied to both the mated joints and unmated joints.Besides,experiment data can be better fit with the g-ζ model with respect to the BB model,the classical exponential model and the logarithm model. | RONG Guan HUANG Kai ZHOU ChuangBing WANG XiaoJiang PENG Jun | 2012 | Science China(Technological Sciences)2012，55，2： | 5 |
| 8 | The variational inequality formulation for unconfined seepage through three-dimensional dense fracture networks显示文摘The space block search technology is used to determine a connected three-dimensional fracture network in polygonal shapes,i.e.,seepage paths.After triangulation on these polygons,a finite element mesh for 3D fracture network seepage is obtained.Through introduction of the generalized Darcy's law,conservative equations for both fracture surface and fracture interactions are established.Combined with the boundary condition of Signorini's type,a partial differential equation(PDE) formulation is presented for the whole domain concerned.To solve this problem efficiently,an equivalent variational inequality(VI) formulation is given.With the penalized Heaviside function,a finite element procedure for unconfined seepage problem in 3D fracture network is developed.Through an example in a homogeneous rectangular dam,validity of the algorithm is verified.The analysis of an unconfined seepage problem in a complex fracture network shows that the proposed algorithm is very applicable to complex three-dimensional problems,and is effective in describing some interesting phenomenon usually encountered in practice,such as 'preferential flow'. | YAO Chi JIANG QingHui WEI Wei ZHOU ChuangBing | 2013 | Science China(Technological Sciences)2013，56，5： | 5 |
| 9 | A relative permeability model for deformable soils and its impact on coupled unsaturated flow and elasto-plastic deformation processes.显示文摘Relative permeability is an indispensable property for characterizing the unsaturated flow and induced deformation in soils. The widely used Mualem model is inadequate for deformable soils because of its assumption of a rigid pore structure and the resultant unique dependence of the tortuosity factor on the volumetric water content. In this study, a unified relationship between the relative permeability and the effective degree of saturation was proposed for deformable soils by incorporating our newly developed water retention curve model into the original Mualem model, in which a new tortuosity factor was defined using the fractal dimension of flow paths and the mean radius of water-filled pores for representing the effect of pore structure variation. The modified deformation-dependent relative permeability model was verified using test data on five types of soils; the verification revealed a much better performance of the proposed model than the original model, which commonly overestimates the relative permeability of deformable soils. Finally, the proposed model was implemented in a coupled numerical model for examining the unsaturated flow and elastoplastic deformation processes in a soil slope induced by rain infiltration. The numerical results showed that the deformation-dependent nature of relative permeability has a remarkable effect on the elastoplastic deformation in the slope and that neglect of the deformation-dependent behavior of relative permeability causes overestimation of the depth of failure. | HU Ran CHEN YiFeng LIU HuiHai ZHOU ChuangBing | 2015 | Science China(Technological Sciences)2015，58，11： | 4 |
| 10 | Landslide susceptibility prediction using slope unit-based machine learning models considering the heterogeneity of conditioning factors显示文摘To perform landslide susceptibility prediction(LSP),it is important to select appropriate mapping unit and landslide-related conditioning factors.The efficient and automatic multi-scale segmentation(MSS)method proposed by the authors promotes the application of slope units.However,LSP modeling based on these slope units has not been performed.Moreover,the heterogeneity of conditioning factors in slope units is neglected,leading to incomplete input variables of LSP modeling.In this study,the slope units extracted by the MSS method are used to construct LSP modeling,and the heterogeneity of conditioning factors is represented by the internal variations of conditioning factors within slope unit using the descriptive statistics features of mean,standard deviation and range.Thus,slope units-based machine learning models considering internal variations of conditioning factors(variant slope-machine learning)are proposed.The Chongyi County is selected as the case study and is divided into 53,055 slope units.Fifteen original slope unit-based conditioning factors are expanded to 38 slope unit-based conditioning factors through considering their internal variations.Random forest(RF)and multi-layer perceptron(MLP)machine learning models are used to construct variant Slope-RF and Slope-MLP models.Meanwhile,the Slope-RF and Slope-MLP models without considering the internal variations of conditioning factors,and conventional grid units-based machine learning(Grid-RF and MLP)models are built for comparisons through the LSP performance assessments.Results show that the variant Slopemachine learning models have higher LSP performances than Slope-machine learning models;LSP results of variant Slope-machine learning models have stronger directivity and practical application than Grid-machine learning models.It is concluded that slope units extracted by MSS method can be appropriate for LSP modeling,and the heterogeneity of conditioning factors within slope units can more comprehensively reflect the relationships between conditioning factors and landslides.The research results have important reference significance for land use and landslide prevention. | Zhilu Chang Filippo Catani Faming Huang Gengzhe Liu Sansar Raj Meena Jinsong Huang Chuangbing Zhou | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，5： | 2 |
| 11 | Stochastic response surface method for reliability analysis of rock slopes involving correlated non-normal variables显示文摘 | Dianqing Li Yifeng Chen Wenbo Lu Chuangbing Zhou | 2010 | Computers and Geotechnics2010，，1： | 2 |
| 12 | Dynamic response of rock mass induced by the transient release of in-situ stress显示文摘 | Wenbo Lu Jianhua Yang Peng Yan Ming Chen Chuangbing Zhou Yi Luo Li Jin | 2012 | International Journal of Rock Mechanics and Mining Sciences2012，，： | 2 |
| 13 | Recent advances in high slope reinforcement in China: Case studies显示文摘This paper reviews a number of engineering technologies and workmanships for addressing the challenging issues concerning possible landslides in large-scale slope reinforcement projects in China.It includes:(1) the multi-point anchored piles with a depth of 64 m in the Jietai Temple rehabilitation project,(2) soil nailing strengthened by driven pipe grouting technique covering an area of530 m × 100 m(length × height) in the Xiluodu hydropower project,(3) the cantilever piles extending vertically from the slope toe to stabilize a 300 m high slope at the Xiaowan hydropower station,(4) a new and simple workmanship for building a pile with cross-sectional area of 20 m × 5 m in the Hongjiadu hydropower station,and(5) comprehensive reinforcement scheme proposed for excavation of a 530 m high slope in Jinping I hydropower station.These new technologies can provide valuable experiences for reinforcement of high slopes of similar projects in China and other regions and countries with similar geological conditions. | Zuyu Chen Zhen Wang Hao Xi Zeyan Yang Lichun Zou Zhong Zhou Chuangbing Zhou | 2016 | Journal of Rock Mechanics and Geotechnical Engineering2016，8，6： | 2 |
| 14 | Numerical modeling of coupled thermo-mechanical response of a rock pillar显示文摘Understanding the rock mass response to excavation and thermal loading and improving the capability of the numerical models for simulating the progressive failure process of brittle rocks are important for safety assessment and optimization design of nuclear waste repositories.The international cooperative DECOVALEX-2011 project provides a platform for development,validation and comparison of numerical models,in which the ?sp? pillar stability experiment(APSE) was selected as the modeling target for Task B.This paper presents the modeling results of Wuhan University(WHU) team for stages 1 and 2 of Task B by using a coupled thermo-mechanical model within the framework of continuum mechanics.The rock mass response to excavation is modeled with linear elastic,elastoplastic and brittle-plastic models,while the response to heating is modeled with a coupled thermo-elastic model.The capabilities and limitations of the model for representation of the thermo-mechanical responses of the rock pillar are discussed by comparing the modeling results with experimental observations.The results may provide a helpful reference for the stability and safety assessment of the hard granite host rock in China's Beishan preselected area for high-level radioactive waste disposal. | Yifeng Chen Chuangbing Zhou Lanru Jing | 2010 | Journal of Rock Mechanics and Geotechnical Engineering2010，2，3： | 1 |
| 15 | Uncertainties of landslide susceptibility prediction considering different landslide types显示文摘Most literature related to landslide susceptibility prediction only considers a single type of landslide,such as colluvial landslide,rock fall or debris flow,rather than different landslide types,which greatly affects susceptibility prediction performance.To construct efficient susceptibility prediction considering different landslide types,Huichang County in China is taken as example.Firstly,105 rock falls,350 colluvial landslides and 11 related environmental factors are identified.Then four machine learning models,namely logistic regression,multi-layer perception,support vector machine and C5.0 decision tree are applied for susceptibility modeling of rock fall and colluvial landslide.Thirdly,three different landslide susceptibility prediction(LSP)models considering landslide types based on C5.0 decision tree with excellent performance are constructed to generate final landslide susceptibility:(i)united method,which combines all landslide types directly;(ii)probability statistical method,which couples analyses of susceptibility indices under different landslide types based on probability formula;and(iii)maximum comparison method,which selects the maximum susceptibility index through comparing the predicted susceptibility indices under different types of landslides.Finally,uncertainties of landslide susceptibility are assessed by prediction accuracy,mean value and standard deviation.It is concluded that LSP results of the three coupled models considering landslide types basically conform to the spatial occurrence patterns of landslides in Huichang County.The united method has the best susceptibility prediction performance,followed by the probability method and maximum susceptibility method.More cases are needed to verify this result in-depth.LSP considering different landslide types is superior to that taking only a single type of landslide into account. | Faming Huang Haowen Xiong Chi Yao Filippo Catani Chuangbing Zhou Jinsong Huang | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，11： | 1 |
| 16 | Fault Diagnosis of Internal Combustion Engines Using Visual Dot Patterns of Acoustic and Vibration Signals显示文摘 | Wua Jianda Chuangb Chaoqin | | 0，，08： | 1 |
| 17 | A Numerical Solution to Seepage Problems with Complex Drainage Systems显示文摘 | Chen Yifeng Zhou Chuangbing Zheng Hong | 2007 | Computers and Geotichnics2007，35，3： | 1 |
| 18 | A study of excavation sequence and contour blasting method for underground powerhouses of hydropower stations显示文摘 | Wenbo Lu Ming Chen Xiang Geng Daqiang Shu Chuangbing Zhou | 2012 | Tunnelling and Underground Space Technology incorporating Trenchless Technology Research2012，，： | 1 |
| 19 | Failure Analysis of High-concrete Gravity Dam Based on Strength Reserve Factor Method 显示文摘 | Zhou Wei Chang Xiaolin Zhou Chuangbing | 2008 | Computers and Geotechnics2008，35，4： | 1 |
| 20 | Fault Diagnosis of Internal Combustion Engines Using Visual Dot Patterns of Acoustic and Vibration Signals显示文摘 | Wua J D Chuangb C Q | | 0，，08： | 1 |
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