Basal heave stability of supported circular excavations in clay

Goh, Alvina

doi:10.1016/j.tust.2016.10.005

Cited by 29 publications

(11 citation statements)

References 18 publications

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“…To consider the effect of B, the whole braced excavation was taken for analysis during the simulation, instead of only half due to symmetry [2,10,15,33,34,37,39]. In this study, plane strain analyses [10,15,37,38,40] were adopted to explore the configuration of failure surfaces and evaluate the basal heave factors of safety with different excavation widths.…”

Section: Simulation Processmentioning

confidence: 99%

“…Estimating the basal heave stability of braced excavation is quite significant for design. Up to the present, it can be performed by using the limit equilibrium method (LEM) [2,[8][9][10][11][12][13][14][15][16][17][18][19], limit analysis method [9,[20][21][22][23][24], probabilistic method [2,10,[25][26][27][28][29][30][31][32], and finite element method (FEM) with shear strength reduction technique (SSRT) [2,10,15,20,[33][34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

“…Naturally, with the continuous development of computer and numerical methods, FEM with SSRT has been widely applied to geotechnical engineering and has gradually become the mainstream numerical method and effective means for the analysis of complex engineering problems. In this way, many scholars [2,10,20,33,[35][36][37][38][39] evaluated the basal heave factors of safety for excavations and analyzed the influence of various factors.…”

Section: Introductionmentioning

confidence: 99%

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Estimating the Basal Heave Stability of Narrow Braced Excavations

Xiao

Yang

Cai

et al. 2021

Shock and Vibration

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Engineering practices indicate that narrow braced excavation exhibits a clear size effect. However, the slip circle method in the design codes fails to consider the effect of excavation width on basal heave stability, causing waste for narrow excavation. In this paper, numerical simulation for basal heave failure of excavation with different widths was performed by FEM with SSRT (shear strength reduction technique). The results revealed that the failure mechanism of narrow excavation is different from the complete slip circle mode. In addition, the safety factor decreases increasingly slowly as the excavation widens and stabilizes when approaching the critical width. Subsequently, the corresponding computation model was presented, and an improved SCM (slip circle method) was further developed. Finally, the engineering case illustrated that it can effectively optimize the design, which exhibits clear superiority.

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Section: Simulation Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Estimating the Basal Heave Stability of Narrow Braced Excavations

Xiao

Yang

Cai

et al. 2021

Shock and Vibration

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“…Hoe [14] reviewed suitability of Mohr-Coulomb model and soil hardening model and compared with field measured data and observed that HS model provided more accurate representation for deformations. The MC model is however still being implemented for analysis of excavations and with reasonable accuracy [15][16][17][18][19][20]. 3D effects of excavations in non-cohesive soils on wall deflections were studied by Hsiung, Yang et al [21].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Anchor Configurations and Field Characteristics on Anchored Diaphragm Walls

James¹,

Kurian²

2020

Gazi University Journal of Science

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“…The shear strength reduction method (SSRM) has been used to check basal heave stability. This method adopts an elastoplastic constitutive relationship for the soil, and basal heave failure curves of circular excavation have been obtained [22][23][24][25][26]. Meanwhile, a centrifuge model and full-scale field test have been introduced for the stability of circular excavations.…”

Section: Introductionmentioning

confidence: 99%

Axisymmetric Arc Sliding Method of Basal Heave Stability Analysis for Braced Circular Excavations

Zhang

et al. 2018

Symmetry

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On the basis of the circular arc sliding model of the limit equilibrium method, an axisymmetric arc sliding method (AASM) is proposed to analyze the basal heave stability of braced circular excavations. The proposed method considers the stiffness of the enclosure structure and spatial effects. The AASM was applied to check basal heave stability in a design example and provided results that were more reasonable than those obtained using other methods. The radii effects in theory and numerical simulation, and the enclosure structure stiffness effects on the basal heave stability safety factor were discussed. Additionally, the effects of the embedded depth on the basal heave stability of a braced circular excavation were analyzed. The safety factor of basal heave stability for a braced circular excavation will be larger when calculated with the AASM than when calculated with the circular arc sliding method, and the optimized embedded depth of the enclosure structure may therefore be reduced by 4∼5 m to lower the cost of the enclosure structure.

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Basal heave stability of supported circular excavations in clay

Cited by 29 publications

References 18 publications

Estimating the Basal Heave Stability of Narrow Braced Excavations

Estimating the Basal Heave Stability of Narrow Braced Excavations

The Effects of Anchor Configurations and Field Characteristics on Anchored Diaphragm Walls

Axisymmetric Arc Sliding Method of Basal Heave Stability Analysis for Braced Circular Excavations

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