Anisotropic Deformation of a Circular Tunnel Excavated in a Rock Mass Containing Sets of Ubiquitous Joints: Theory Analysis and Numerical Modeling

Wang, Tai‐Tien; Huang, Tsan‐Hwei

doi:10.1007/s00603-013-0405-8

Cited by 51 publications

(26 citation statements)

References 24 publications

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“…Jiang et al [20] discussed the relationship between deformational behavior and fractal dimension and orientation of joint sets based on fractal analysis and numerical simulation of underground opening in jointed rock masses. Wang et al [21] investigated the anisotropic deformation of a circular tunnel excavated in a rock mass containing sets of ubiquitous joints. They demonstrated that where a rock mass has two joint sets with unfavorable joint orientations, the area with joint sliding failure can deteriorate mutually, resulting in large anisotropic deformation.…”

Section: Introductionmentioning

confidence: 99%

“…Such discontinuities can aggravate stress concentration and strength degradation, thus resulting in different patterns of rock mass failure around the opening compared with the patterns observed in isotropic rock masses. According to the number of discontinuities considered, related analytical models can be classified into three main categories, namely: a 'one-joint' model [10][11][12][13]; a 'single set of joints' model [8,[14][15][16][17][18]; and a 'multiple set of joints' model [19][20][21][22]. The 'one-joint' model is particularly used to investigate the effect of a fault, which is a large geological discontinuity, on the deformation and failure behavior of an underground opening.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Yang

Jing

Chen

2016

International Journal of Mining Science and Technology

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Yang

Jing

Chen

2016

International Journal of Mining Science and Technology

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“…Portal stability is markedly influenced by geographical, geological, meteorological, and hydrological factors [4][5][6][7][8]. Wang and Huane [9] studied tunnel constructions in Taiwan and reported that landslides and slope collapses can be detrimental to the success of portal constructions. Therefore, selecting appropriate portal locations has become crucial in planning and designing mountain tunnels.…”

Section: Introductionmentioning

confidence: 99%

Safety Assessment of Tunnel Portals for Site Selection Based on Spatial Information Geoprocessing

Wang

2019

Infrastructures

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The evaluation of portal locations for mountain tunnels is among the most crucial considerations during route selection and structural layout planning. The development of spatial information technology has provided a more objective approach for assessing the slope stability of potential portal sites. The simulations in such studies have been performed to evaluate potential hazards and slope stability. However, potential instabilities resulting from excavation are seldom considered in these studies. Therefore, a method based on spatial information technology was developed in this study for considering the potential impact of the direction and depth of excavations on portal stability. An analysis method for an infinite slope was integrated into the geographical information system for evaluating the stability of critical wedges. The proposed method provides a reasonable estimation comparable with that provided by the conventional slice method. The results of applying this method to six mountain tunnel portals where slope instability occurred during construction indicate that the actual outcomes agreed with the predicted outcomes. For potential portal site evaluation, the proposed method facilitates the rapid estimation of safety factors for various slope designations, which is useful for site selection.

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“…But many existing studies [1][2][3][4] on the jointed rock mass mechanical behavior only focus on the effect of the joint on rock mass and ignore that of the microcracks. Wang et al [1,5] established a mathematic model for the rock mass with multi-sets of ubiquitous joints and an associated numerical implementation accounting for the anisotropy in strength and deformation induced by the joints. In order to account for the roughness of the discontinuities, Halakatevakis et al [2] extended the original plane of weakness theory by imposing the nonlinear Barton-Bandis shear strength criterion for the discontinuities.…”

Section: Introductionmentioning

confidence: 99%

A Damage Constitutive Model for Rock Mass with Nonpersistently Closed Joints Under Uniaxial Compression

Liu

Zhang

2015

Arab J Sci Eng

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As part of the rock mass, both the macroscopic flaws such as joints and the mesoscopic flaws such as microcracks affect the strength and the deformational behavior of rock mass. Existing models can either handle any one of them alone, and a model which can consider the co-effect of these two kinds of flaws on rock mass mechanical behavior is not yet available. This study focusses on rock mass with nonpersistently closed joints and establishes a new damage constitutive model for it. Firstly, the damage model for the intact rock which contains only the mesoscopic flaws is introduced. Second, the expression of the macroscopic damage variable (tensor) which can consider the joint geometrical and mechanical properties at the same time is obtained based on the energy principle and fracture theory. Third, the damage variable based on coupling the macroscopic and mesoscopic flaws is deduced based on Lemaitre strain equivalence hypothesis, and then the corresponding damage constitutive model for rock mass with nonpersistently closed joints under uniaxial compression is set up. Finally, the test data for the intact rock under uniaxial compression are adopted to validate the proposed model. A series of calculation examples verify that the proposed model is capable of presenting the

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Anisotropic Deformation of a Circular Tunnel Excavated in a Rock Mass Containing Sets of Ubiquitous Joints: Theory Analysis and Numerical Modeling

Cited by 51 publications

References 24 publications

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Safety Assessment of Tunnel Portals for Site Selection Based on Spatial Information Geoprocessing

A Damage Constitutive Model for Rock Mass with Nonpersistently Closed Joints Under Uniaxial Compression

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