Joints rock mass

Liu Y, Cai Y, Liu Q and Wu Y. 2002. Study on mechanical behaviour of jointed rock mass affected by temperature and saturated water. Chinese J. of Rock Mech. Engng., 21(2), 233-237. 

Wu Y. 1996. The coupled stress-ground water flow-model for jointed rock mass. J. of Geological Hazards Environmental... 

Liu Yachen, Cai Yaoqing., Liu Quansheng and Wu Yushan, 2001, Thermal-hydraulic-mechanical coupling constitutive relation of rock mass fracture interconnectivity, Chinese J. Geotech. Eng., Vol.23, No.2, pp. 196-200 Liu Yachen, Cai Yongqing, Liu Quansheng and Wu Yushan, 2002, Study on mechanical behavior of jointed rock mass affected by temperature and saturated water, Chinese J. Rock Mech. Eng., Vol.21,No.2, pp.233-237... 

Zhou Chuangbing and Xiong Wenlin,1996, Permeability tensor for Jointed rock masses in coupled seepage and stress field, Chinese J. Rock Mech. Eng., Vol.l5, No.4, pp.345-352... 

The Compliant Joint Model (CJM) was chosen for the mechanical calculations for this analysis. The CJM uses an equivalent continuum approach to model the behavior of jointed media. An equivalent continuum approach captures the average response of a jointed rock mass by distributing the response of the individual joints throughout the rock mass. The CJM in JAS3D can model up to four joint sets of arbitrary orientation, with the fractures in each set assumed to be parallel and evenly spaced. The intact rock between joints is treated as an isotropic linear-elastic material. More detailed descriptions of the CJM model can be found in Chen (1991). 

Chen, E.P. 1991. A Constitutive Model for Jointed Rock Mass with Two Intersecting Sets of Joints. SAND89-0592. Albuquerque, New Mexico Sandia National Labs. 

Oda, M., 1986. An Equivalent Continuum Model for Coupled Stresses and Fluid Flow Analysis in Jointed Rock Masses, Water Resour. Res. 22,... 

Oda, M., 1986. An equivalent continuum model for coupled stress and fluid flow analysis and jointed rock masses. Water Resources Research, V. 22, No. 13, pp. 1845-1856. 

Lin, C.T., Amadei, B., Jung, J. Dwyer, J. 1996. Extensions of discontinuous deformation analysis for jointed rock masses. Int J Rock Mech Min Sci 33 pp.671-694. 

Yoshida, H., Itoyama, T, and Horii, H. 1999. Coupling analysis of deformation and flow in Jointed rock mass during cavern excavation, Applied Mechanics, J. of Applied Mechanics, JSCE, 2, pp.325-334. 

COUPLED DAMAGE-SEEPAGE CONSTITUTIVE MODEL OF JOINTED ROCK MASSES AND ITS ENGINEERING APPLICATION... 

Along with the construction of a series of great hydropower stations, the problems of landslides caused by the rise of water level, and the stability of high slopes under the sharp rise of water pressure by rainfall are in critical needs in China. Consequently, the coupled problem of unsteady flow and damage of jointed rock mass are related to all above problems and is addressed in this paper. Some basic research works had been done by Yang (1995). The authors of this paper set up the coupled constitutive model of unsteady flow and damage, and the model was applied to analyze the stability of high slope of the permanent lock of TGP. 

Oda (1986) deduced the permeability tensor of jointed rock mass by the theory of statistics, which not only considered the connectivity of fractures, but also the stochastic distributions of the geometrical parameters. Whereas probabilistic density is quite complex, therefore it is quite difficult for practical use. Zhu (1997) deduced the mathematic expression of a permeable tensor for an equivalent continuum given by... 

Practically, r(xk masses are in compression and shear state because of the in situ stresses. The unloading of the rock nnasses near excavated slopes causes tension-shear stress state in part of the slopes. Consequently, it is necessary to set up constitutive model of jointed rock masses considering both compression-shear and tension-shear mechanisms. 

A A constitutive model of the Jointed rock masses under compression and shear... 

According to the principle of self-consistency (Kemeny, 1986), the compliance tensor of a jointed rock mass under tension and shear stress state can be deduced as... 

Damage evolution equation of Jointed rock mass under tension and shear... 

DAMAGE MODEL COUPLED WITH HYDRO-MECHANICAL BEHAVIOUR OF JOINTED ROCK MASS... 

Jointed rock mass can be regarded as equivalent continuum media if the distribution of fractures are in uniform style, a RVE (representative volume element) can be established, and the fracture flow controls the seepage of rock masses. A hydro-mechanical model of jointed rock mass coupled with damage is developed in this paper, based on the equivalent continuum assumption. From eqations (l) (i4), a FEM formulation can be established as below... 

Taking account into the damage evolution of jointed rock mass, the resilient displacement increases slightly during the excavation of the ship lock. Displacement apparently increases in the region of damage evolution and the maximum is in the middle of the left slope, the left of plumb wall and middle frusta. 

In this study, briefly explained is the site investigation made in earlier design stage to determine the dimension of cavern. The predicted temperature distribution around cavern was compared with measured values during the 5 years of operation. Also a practical method to evaluate the thermal properties of Jointed rock mass was suggested and verified. 

Zhu H C, et al. 2004. Numerical modeling methods and application for jointed rock mass, part 2 application in engineering practice. Chinese Journal of Rock Mechanics and Engineering, 23 (20) 3444-3449. 

Kittitep Fuenkajom, Decho Phueakphum. 2010. Physical model simulation of shallow openings in jointed rock mass under static and cyclic loadings. Engineering Geology, 113(l ) 81-89. 

Cai. M. et al. 2007. Peak and Residual Strengths of Jointed Rock Mass and Their Determination for Engineering Design. Rock Mechanics, 259-267. 

Static and Dynamic Elastic Modulus of Jointed Rock Mass... 

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