Tunnel stability assessment by 3D DDA-key block analysis

Wu, Wei; He-hua, Zhu; Lin, Jeen-Shang; Zhuang, Xiaoying; Ma, Guowei

doi:10.1016/j.tust.2017.07.015

Cited by 50 publications

(19 citation statements)

References 12 publications

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“…Mahabadi presented a new numerical code based on the combined finite-discrete element method (FDEM), named Y-Geo, and illustrated two of its geomechanical applications [13]. Wei Wu put forward a discontinuous deformation analysis (DDA)-key block theory that can alleviate some shortcomings of the key block theory and illustrated an example [14]. Leandro L. improved the classic lattice spring model by considering the Synthetic Rock Mass technique and the Barton-Bandis joint constitutive model to analyze the stability of rock tunnels under low in situ stress conditions [15].…”

Section: Introductionmentioning

confidence: 99%

A Strain-Softening Constitutive Model of Heterogeneous Rock Mass Considering Statistical Damage and Its Application in Numerical Modeling of Deep Roadways

Liu

et al. 2019

Sustainability

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During the construction of underground caverns, the stability of deep underground cavern excavation, which affects the safety and sustainable development of such projects, is a hot issue. First, based on the mechanical properties of surrounding rock in deep tunnels, the strain-softening behavior, damage, and heterogeneity of rock masses are analyzed. Then, a strain-softening model of heterogeneous jointed rock mass that considers statistical damage (SSD) is developed and implemented through FLAC3D simulation software. Finally, the SSD is applied to a deep roadway in the Jinchuan mining area, and a comparative analysis of the computation results of the Mohr–Coulomb (MC) model and the strain-softening (SS) model are carried out. The numerical results are compared with the field-monitoring results, which show that the SSD model simulated the behavior of the surrounding rocks well. The results show that the deformations of the roof and floor are larger, which may serve as a reference for the support pattern of deep roadways.

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Section: Introductionmentioning

confidence: 99%

A Strain-Softening Constitutive Model of Heterogeneous Rock Mass Considering Statistical Damage and Its Application in Numerical Modeling of Deep Roadways

Liu

et al. 2019

Sustainability

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“…The study on the multi-factorial analysis on the stability of unsymmetrically loaded tunnel is very limited. The tunnel stability is one of the most important research topics in tunnel engineering *Corresponding Author Email: ericzdb@foxmail.com (D. Zhang) which has been widely studied [7][8][9][10]. These studies are beneficial to the tunnel engineers and have become the primary reference for the unsymmetrical loading design for tunnels in many countries.…”

Section: Introductionmentioning

confidence: 99%

Multi-factorial Analysis on Vault Stability of an Unsymmetrically Loaded Tunnel Using Response Surface Method

Zhang

Cheng

et al. 2019

IJE

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This study investigated the vault settlement characteristics of an unsymmetrically loaded tunnel which was excavated by annular excavation via core rock support method. Response surface methodology (RSM) was employed to design the experiments, evaluate the results with the purpose of optimizing the value of design parameters for reducing the vault settlement. The parameters such as horizontal distance, step length, tunneling depth, width of core rock, strength of surrounding rocks and support strength were firstly examined, and a second-order polynomial regression equation was then derived to predict the responses of vault settlement. The percentage contribution, validity of model and effects of different parameters as well as their interactions were assessed by analysis of variance (ANOVA). In the order from high to low effect, these parameters are strength of surrounding rocks, support strength, horizontal distance, width of core rock, tunneling depth, and step length. The results indicated that the influence of uncontrollable factors (i.e. strength of surrounding rocks, tunneling depth, and horizontal distance) on the vault settlement can be reduced through the adjustment of controllable factors (i.e. Width of core rock, step length, and support strength). Moreover, the proposed method in this paper was validated with results of field test measurement and simulation calculation which verified its feasibility.

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“…Visualization of scientific computing emerged in the late 1980s (Li, Cai, & Lu, 2018). It uses computer technology to convert the data of scientific or engineering calculation process and calculation results into graphics or images, and display these graphics or images on the screen for interactive processing theory, methods and techniques (Wu, Zhu, Lin, Zhuang, & Ma, 2018). Three-dimensional geological modelling technology is a branch of scientific computing visualization technology.…”

Section: Introductionmentioning

confidence: 99%

Virtual Display System of Geological Body Based on Key Algorithms of Three-dimensional Modelling

Feng

2019

Earth sci. res. j.

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In order to study the virtual display system of geological body, the key algorithm of three-dimensional modelling is used to analyze it, and the virtual display scheme of geological body is realized. Three-dimensional modelling of geological bodies is a frontier field of current geoscience research, and also a hot issue in computer science. Its research can complement and improve the theoretical basis of virtual reality technology and expand its application fields. Geological body three-dimensional modelling software can meet the needs of geoscientists to study geological problems more effectively from three-dimensional space, and has considerable practical value. In the network environment, users' information needs are diversified and individualized, and special attention is paid to the breadth, novelty and timeliness of information. Faced with massive information resources, the information users need is a drop in the ocean in the huge and disorderly network information space. Users need to spend a lot of time and energy to find valuable information in all kinds of uniform systems. Traditional system information services can no longer help users effectively get rid of information overload and information lost. Therefore, the concept of personalized service system has become a hot spot of people' s attention as soon as it is put forward. In recent years, personalized systems have emerged in endlessly. In the early stage of formulation and implementation of personalized service strategy, the existing personalized service generally lacks the attention to context information such as user' s environment. There are weak links in personalization and intellectualization of service, which damages user experience. Therefore, Shepard algorithm and Kriging algorithm of three-dimensional modelling are used to study the virtual display system of geological bodies. The results show that these two key algorithms play a very important role in the research process of geological virtual display system, and also provide a new idea for further research on the popularization of geological knowledge.

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Tunnel stability assessment by 3D DDA-key block analysis

Cited by 50 publications

References 12 publications

A Strain-Softening Constitutive Model of Heterogeneous Rock Mass Considering Statistical Damage and Its Application in Numerical Modeling of Deep Roadways

A Strain-Softening Constitutive Model of Heterogeneous Rock Mass Considering Statistical Damage and Its Application in Numerical Modeling of Deep Roadways

Multi-factorial Analysis on Vault Stability of an Unsymmetrically Loaded Tunnel Using Response Surface Method

Virtual Display System of Geological Body Based on Key Algorithms of Three-dimensional Modelling

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