Tunnel support for stress induced failures in Hawkesbury Sandstone

Oliveira, David; Diederichs, Mark S.

doi:10.1016/j.tust.2017.01.003

Cited by 40 publications

(11 citation statements)

References 10 publications

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“… 5,11,12 Nevertheless, discrete explicit formulations are difficult to utilize in practice since they usually incur higher computational costs than implicit continuum formulations. 9,13 …”

Section: Introductionmentioning

confidence: 99%

“…5,11,12 Nevertheless, discrete explicit formulations are difficult to utilize in practice since they usually incur higher computational costs than implicit continuum formulations. 9,13 Given the above, the Continuum Voronoi Block Model (CVBM) is presented in this paper. It is a pseudo-discontinuum modeling technique based on the FEM, implemented using the RS2 software.…”

Section: Introductionmentioning

confidence: 99%

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The Continuum Voronoi Block Model for simulation of fracture process in hard rocks

Rógenes

Farias

Rasmussen

2021

Num Anal Meth Geomechanics

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In this paper, a numerical model is presented to represent the fracture process in hard rocks based on a pseudo‐discontinuum method called the Continuum Voronoi Block Model (CVBM). To validate this tool, numerical models for one Brazilian test, one unconfined compression test, and multiple triaxial compression tests with different confining stress were calibrated to match laboratory test results for Creighton granite. The model proved robust and matched the following macro‐properties: crack initiation (CI) stress, (CD) stress, peak strength, tensile strength, Young's Modulus, and Poisson's ratio. The calibrated model served as a basis for a sensitivity study to analyze how micro‐properties influence the rock's macroscopic responses. From the sensitivity study, a calibration methodology was proposed, which shall facilitate the use of the CVBM in future works.

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“… 5,11,12 Nevertheless, discrete explicit formulations are difficult to utilize in practice since they usually incur higher computational costs than implicit continuum formulations. 9,13 …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Continuum Voronoi Block Model for simulation of fracture process in hard rocks

Rógenes

Farias

Rasmussen

2021

Num Anal Meth Geomechanics

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“…It analysed the load and deformation behaviour of the deflection section and developed a mechanical model. Figure 1 displays the bolt support effect of rock in rock slopes [8][9][10][11]. Bolt can resist shear failure in weak plane and the sliding in rock mass.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the bolt performance with shear force

Mao¹,

Chen²

2020

E3S Web Conf.

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The bolt anchorage performance with shear force has been analysed by analytical method in this paper. By coding in Matlab, the loop and the judgment statement can be used to control the displacement angle. The force-displacement curve of the analysis model from the beginning of loading to the failure of the bolt under a certain displacement loading angle is obtained. In the test and field, the values of displacement and force before failure and the load-displacement curves before the peak value can be obtained by using the program with the parameters. The bolt deformation in different strength surrounding rock mass and the anchoring influence of the rock bolt with different diameters have been studied. The resultant displacement increases linearly with the increase of the bolt, and the resultant force increases exponentially with the increase of the bolt.

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“…Dadashi et al [42] analyzed and revised the support structure parameters after a soil mechanics property evaluation, and then a support system using shotcrete, steel mash, and lattice beam was proposed for a squeezing tunnel based on the parameters obtained from the back analysis. Oliveira and Diederichs [43] discussed the brittle failure simulation of the sandstone and influence of the high geostress on tunnel support design. Panthi and Nilsen [44] believes that the best way to deal with severe squeezing is to preestablish a strategy including planning and design phases to minimize the stability problem and optimize the support and stability measures.…”

Section: Introductionmentioning

confidence: 99%

Support System for Tunnelling in Squeezing Ground of Qingling‐Daba Mountainous Area: A Case Study from Soft Rock Tunnels

Wang

Lai

Garnes

et al. 2019

Advances in Civil Engineering

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Tunnelling or undertaking below-ground construction in squeezing ground can always present many engineering surprises, in which this complicated geology bring a series of tunnelling difficulties. Obviously, if the major affecting factors and mechanism of the structure damage in these complicated geological conditions are determined accurately, fewer problems will be faced during the tunnel excavation. For this study, reference is made to four tunnel cases located in the Qingling-Daba mountainous squeezing area that are dominated by a strong tectonic uplift and diversified geological structures. This paper establishes a strong support system suitable for a squeezing tunnel for the purpose of addressing problems exhibited in the extreme deformation of rock mass, structure crack, or even failure during excavation phase. This support system contains a number of temporary support measures used for ensuring the stability of tunnel face during tunnelling. The final support system was constructed, including some key techniques such as the employment of the foot reinforcement bolt (FRB), an overall strong support measure, and more reserved deformation. Results in this case study showed significant effectiveness of the support systems along with a safe and efficient construction process. The tunnel support system proposed in this paper can be helpful to support design and provide sufficient support and arrangement before tunnel construction in squeezing ground.

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Tunnel support for stress induced failures in Hawkesbury Sandstone

Cited by 40 publications

References 10 publications

The Continuum Voronoi Block Model for simulation of fracture process in hard rocks

The Continuum Voronoi Block Model for simulation of fracture process in hard rocks

Analysis of the bolt performance with shear force

Support System for Tunnelling in Squeezing Ground of Qingling‐Daba Mountainous Area: A Case Study from Soft Rock Tunnels

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