Pile end bearing capacity in rock mass using cavity expansion theory

Gharsallaoui, Haythem; Jafari, Mustafa; Holeyman, Alain

doi:10.1016/j.jrmge.2020.03.004

Cited by 12 publications

(5 citation statements)

References 13 publications

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“…The size of plastic zone (or damage zone) is a key parameter for support design and construction safety assessment, 6–9,34 it also serves the indicator of the stability of pile foundation and tunnel face, penetration effects, etc. The stress distribution and the deformation around the opening cavity could be affected by the damage evolution inside rock mass.…”

Section: Discussionmentioning

confidence: 99%

“…Cavity expansion model is a simple but effective tool for mechanical analysis in rock mechanics and geotechnical engineering, which has been widely used in the evaluation of cone penetration test, 1–3 well bore stability, 4–5 pile bearing capacity, 6–8 tunnel stability, 5,9–10 etc. Many cavity expansion solutions have been proposed after Vesic, 11 who proposed cavity expansion solution in infinite soil mass to evaluate bearing capability of pile foundation.…”

Section: Introductionmentioning

confidence: 99%

“…With the rapid development of underground construction, petroleum engineering and the urgent need of pile installing in rock stratum, cavity expansion solutions were also derived for rock medium 4,6–9,35 . Most solutions mentioned above were derived for cavity contraction problem in order to evaluate borehole stability, 4,35 tunnel stability, 9,36 etc.…”

Section: Introductionmentioning

confidence: 99%

“…Most solutions mentioned above were derived for cavity contraction problem in order to evaluate borehole stability, 4,35 tunnel stability, 9,36 etc. Recently, Gharsallaoui et al 6–7 . derived a cavity expansion solution for rock medium, to evaluate bear capacity of piles in rocks based on generalized Hoek‐Brown criteria.…”

Section: Introductionmentioning

confidence: 99%

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Spherical cavity expansion in porous rock considering plasticity and damage

Huang¹,

Liang²,

et al. 2021

Num Anal Meth Geomechanics

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In rock engineering, damage evolution upon loading imposes significant impacts on the stiffness of rock mass and its deformation characteristics. In order to investigate the influence of both damage and plasticity on cavity expansion, a plastic damage solution is derived for undrained spherical cavity expansion in rock medium. For the consideration of plasticity‐damage, Modified Cam‐Clay (MCC) model is selected as the plasticity driver, a damage evolution criterion is adopted and coupled with MCC. The coupled damage MCC model is validated against experimental data in the literature. The proposed cavity expansion solution with the consideration of plasticity damage is verified through a classic solution in literature. The role of damage in undrained spherical cavity expansion is investigated by studying the spatial variations of effective stress, pore pressure and damage for cases with different stress ratios. Distribution of cavity expansion induced plastic and damage zones for cases with different stress ratios are also reproduced and discussed. Cavity expansion results show that, the damage zone should be considered for engineering application as the plastic zone is affected due to the damage evolution. In addition, the stability (e.g., radial stress) of rock mass is overestimated in classical solution without the consideration of damage zone.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spherical cavity expansion in porous rock considering plasticity and damage

Huang¹,

Liang²,

et al. 2021

Num Anal Meth Geomechanics

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“…The applicability in solving geotechnical engineering problems of the cavity expansion method has been widely verified by cone penetration test and pressuremeter test [3,14,22,27,37], pile driven process [17,32,33,36,46], analysis of pile foundation bearing capacity [6,15,23,35], and underground excavation [25,26,28,39,47]. During the development of cavity expansion theory in engineering, two critical challenges must be addressed: the choice of solution techniques and the selection of an appropriate constitutive model for soils.…”

Section: Introductionmentioning

confidence: 99%

Drained cavity expansion analysis with a unified hardening (UH) model for clays and sands

Li,

Chen

et al. 2024

Preprint

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This study presents a novel semi-analytical solution for the drained expansion of cylindrical and spherical cavities with a unified hardening model for both clays and sands (CSUH). The three-dimensional strength of soils is considered using the stress transformation method. Large-strain analyses are incorporated into the developed cavity expansion solution to obtain the entire stress-strain histories of soils in the plastic regions. By formulating the problem as an initial value problem in the Lagrangian scheme using an auxiliary independent variable, the present study solves the problem numerically. A thorough parameter analysis is conducted for both cylindrical-spherical and clay-sand scenarios, and the results are compared with other existing solutions to demonstrate the distinctive attributes of the present solution. It is found that the present solution can effectively capture the evolution processes of both strength and overconsolidation characteristics of soils, as well as the contracting and dilating behaviors of soils. Three key advantages of the present solution are its sufficient accuracy, less and easily determined parameters, and broad applicability in both clays and sands, resulting in extensive application in engineering, including tunneling, pile foundation construction, and cone penetration tests in clay-sand scenarios under drained conditions.

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