Design optimisation of retaining walls in narrow trenches using both analytical and numerical methods

Hosseinzadeh, Saeed; Joosse, Jaap F.

doi:10.1016/j.compgeo.2015.06.002

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…Such studies have rarely used numerical analysis to verify the size efect and classify foundation pits under realistic conditions. Hosseinzadeh and Joosse [25][26][27][28] studied the infuence of soil coupling in the passive area of foundation pits on the stability of foundation pits, calculated the coefcient of passive earth pressure and active earth pressure, and introduced the strengthening factor of passive earth pressure to optimise the embedding depth of the envelope structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Size on the Stability of Narrow Foundation Pits

Yang

2022

Advances in Civil Engineering

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The traditional design method for narrow foundation pits ignores size effects. Engineering practice shows that this is too conservative and causes large-scale waste. In this study, with the help of ABAQUS finite element software, retaining-structure models in semi-infinite and infinite elastic space are used to simulate the mechanical performances of pile-supported structures under different combinations of excavation depth, retaining pile-embedded depth, and excavation width. Furthermore, based on antioverturning stability theory and circular slip theory, the intrinsic relationship among these variables and their effects on the stability of excavation is analysed. Finally, based on the restraint effect of retaining structures on the soil below the pit bottom under actual working conditions, critical width is determined and used to classify foundation pits. Moreover, the applicability of existing codes is discussed. These results can improve the design and construction of narrow excavations, benefitting the construction industry and society in general.

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Section: Introductionmentioning

confidence: 99%

Effect of Size on the Stability of Narrow Foundation Pits

Yang

2022

Advances in Civil Engineering

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“…is type of excavation shows an obvious size effect, with smaller deformation and better stability [1][2][3][4][5][6][7]. Tan and Wei [4] attributed this phenomenon to the narrow geometry, while the numerical simulation results indicated that narrower excavation has better support system stiffness [6].…”

Section: Introductionmentioning

confidence: 99%

“…Logically, for narrow excavations, the support system can decrease accordingly [5]. Hosseinzadeh and Joosse [3] proposed a new design optimization method by quantifying the effect of overlapping passive zones.…”

Section: Introductionmentioning

confidence: 99%

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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