Undrained cavity expansion in anisotropic soils with isotropic and frictional destructuration

Mo, Pin‐Qiang; Chen, Haohua; Yu, Hai‐Sui

doi:10.1007/s11440-021-01412-5

Cited by 19 publications

(9 citation statements)

References 56 publications

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“…The stress-induced anisotropy and K 0 -consolidation clearly showed a significant effect on the distributions of effective stresses and excess pore water pressure around the cylindrical cavity. This work was then extended for drained and undrained conditions based on the SANICLAY model, [17][18][19] S-CLAY1 model, 20 and SCLAY1S model. 21 It is well-known that sand exhibits a different stress-strain response from clay soil.…”

Section: Introductionmentioning

confidence: 99%

Undrained expansion analyses of a cylindrical cavity in anisotropic sands incorporating the SANISAND model

Pang,

Jiang,

Zhang

2023

Num Anal Meth Geomechanics

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Soils are known to be inherently anisotropic, resulting in complex responses to loading. This paper aims to develop an elastoplastic solution for the undrained expansion of a cylindrical cavity in sands adopting a non‐associated and anisotropic model, SANISAND. The rigorous derivation of the stress‐strain state of the soil element is provided following a standardized solving procedure. The dilatancy and crushing of the soil are invoked in the three‐dimensional cavity expansion solution by adopting the critical state soil mechanics and limiting compression curve, respectively. By combining this with a governing equation that considers the undrained condition, the stress‐strain state of the surrounding soil around the cavity can be determined. A subroutine is then implemented into the ABAQUS FEM simulation to verify the solution. The solutions are also validated against those based on an isotropic model, and anisotropic sand is used to investigate the effects of the initial effective mean stress, at‐rest coefficient of earth pressure, and overconsolidation ratio on the stress distribution, stress path, and boundary surfaces.

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Section: Introductionmentioning

confidence: 99%

Undrained expansion analyses of a cylindrical cavity in anisotropic sands incorporating the SANISAND model

Pang,

Jiang,

Zhang

2023

Num Anal Meth Geomechanics

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“…With the continuous construction of deep-buried tunnels all over the world, there are more and more high-temperature tunnels. Groundwater is a harmful component for tunnels [1][2][3][4][5], because it will not only reduce the strength of the surrounding rock but also sudden surges of water may happen when the treatment is not at the time [6][7][8][9], resulting in casualties and property damage, and the construction progress may be delayed [10][11][12][13]. During operation, groundwater infiltration accelerates the rusting of steel bars in the lining and shortens the service life of the equipment [14][15][16][17], increasing the difficulty of maintenance.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Diffusion of Fissure Slurry at High Temperature

et al. 2022

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Deep-buried tunnel at high-ground temperature is prone to the sudden surge of water when crossing the water-rich formation, resulting in casualties and economic losses. Slurry injection is a common and effective method of governance for addressing this issue. However, there has been little research into pulping at high-ground temperature, with most of the existing research focusing on room temperature conditions. We studied two kinds of slurry commonly used in grouting, cement slurry and cement-sodium silicate slurry. Indoor testing was used in this paper to clarify the effect of temperature on slurry viscosity, and numerical simulation was used to study slurry diffusion in flat cracks at different temperatures. The results showed that in a hydrostatic environment, the spread rate of slurry was independent of temperature and type of slurry. For the same kind of slurry, the higher the temperature, the greater the maximum slurry pressure. The higher the temperature in a flow environment, the faster the slurry diffusion. As the temperature rised, the grouting pressure required for crack sealing decreased at first then rises. In a flow environment, the sealing effect of cement-sodium silicate slurry was superior to that of cement slurry.

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“…Cavity expansion/contraction theory is concerned with the changes in the stresses and displacements for soil elements around a cavity. Analytical solutions of cavity expansion and contraction have been proposed for geomaterials with many geotechnical implications [ 10 – 14 ]. These solutions facilitate analyses on the stability of underground structures, and serve as benchmarks for further developments and numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

An elastic-plastic solution for the optimal thickness of a frozen soil wall considering an interaction with the surrounding rock

Kuang

Wang

et al. 2022

PLoS ONE

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The technology of artificial ground freezing has been widely applied in geotechnical engineering to support underground spaces, whereas the effects of excavation-induced large deformation and frictional and dilatant behavior of geomaterials are neglected in the current design. In this paper, a rigorous elastic-plastic solution of cavity contraction is proposed using a non-associated Mohr-Coulomb failure criterion to provide the optimal thickness of the frozen soil wall for excavation using artificial ground freezing technology, considering an interaction between the frozen soil wall and the surrounding soil/rock. After validation of a case study on a deep mine shaft against a numerical simulation, a thorough parametric study investigates the variation in the optimal thickness with the soil properties and initial stress conditions, as well as the effects of interaction and the critical condition. Compared to the existing solution, the proposed optimal thickness of the frozen soil wall is shown to contribute to both the design and cost-effectiveness in practical engineering, including tunneling and mine shaft construction.

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Undrained cavity expansion in anisotropic soils with isotropic and frictional destructuration

Cited by 19 publications

References 56 publications

Undrained expansion analyses of a cylindrical cavity in anisotropic sands incorporating the SANISAND model

Undrained expansion analyses of a cylindrical cavity in anisotropic sands incorporating the SANISAND model

Numerical Simulation of the Diffusion of Fissure Slurry at High Temperature

An elastic-plastic solution for the optimal thickness of a frozen soil wall considering an interaction with the surrounding rock

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