Slip-Line Solution for the Active Earth Pressure of Narrow and Layered Backfills against Inverted T-Type Retaining Walls Rotating about the Base

Zhang, Fei; Chen, Hao-biao; Jiang, Guoping; Chen, Fuquan

doi:10.1061/ijgnai.gmeng-7866

Cited by 9 publications

(3 citation statements)

References 19 publications

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“…A series of numerical studies on the failure mechanism of retaining walls with narrow backfill have been also conducted including the finite element method, 19 the finite difference method, 20 and the finite element limit analysis method. [21][22][23][24][25][26][27][28] These works contributed to the further improvement of the earth pressure theory. However, the discrete element method has been seldom used to investigate the failure mechanism of the narrow backfill behind the retaining walls, especially for the passive failure mechanism.…”

Section: Introductionmentioning

confidence: 95%

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Discrete element analysis and analytical method on failure mechanism of retaining structures with narrow granular backfill

Li,

Chen,

Chen

et al. 2023

Num Anal Meth Geomechanics

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Ascertaining failure mechanism is a prerequisite of the derivation for earth pressure against retaining structures. Retaining structures constructed adjacent to existing structures and excavation with narrow backfill have become common in practical engineering. The backfill width has a significant effect on the failure mechanism, requiring further study. In this study, a series of discrete element analyses are conducted to investigate the shear localization in soil mass behind retaining structures with narrow backfill in the active and passive limit states at the grain scale. Furthermore, the distribution characteristic of failure surfaces in soil mass is discussed from three aspects: the development of the failure surface, the state of soil mass behind retaining structures, and the shape of the failure surface. Based on the typical nonlinear failure mechanisms observed in particle rotation contours with various backfill widths and interface friction angles, the failure mechanisms behind retaining structures with narrow spacing are categorized into three types according to the backfill widths. According to the stress characteristics of interfaces under different failure mechanisms, the variational method and Mohr stress circle analysis are adapted to analytically obtain the failure surfaces behind the retaining structure with narrow backfill. Comparisons with results obtained by the discrete element simulation show a reasonable agreement. In addition, a series of parameter studies are conducted to investigate the effect of backfill widths and interface friction angles on the failure mechanism.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Discrete element analysis and analytical method on failure mechanism of retaining structures with narrow granular backfill

Li,

Chen,

Chen

et al. 2023

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…The earth pressure acting on the stem and the second failure surface could be obtained by converting the boundary conditions. The results of the proposed method were compared with those obtained from finite-element limit analysis and existing theoretical solutions [ 14 ]. It is challenging to design and assess retaining walls due to disagreements regarding how earthquakes affect the toe of retaining walls in design codes in China and other countries.…”

Section: Introductionmentioning

confidence: 99%

Study on the failure characteristics of sliding surface and stability analysis of inverted t-type retaining wall in active limit state

Zeng,

Hu,

Chen

et al. 2024

PLoS ONE

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This paper investigates the sliding surface failure characteristics, earth pressure distribution law and stability safety factor of inverted T-type retaining wall by using the finite element limit analysis software OptumG2, the effects of width of wall heel plate, width of wall toe plate, thickness of bottom plate, soil–wall interface friction angle, soil cohesion and soil internal friction angle of filling on the failure characteristics of sliding surface, the earth pressure distribution law and stability safety factor of retaining walls are analyzed, The stability safety factor of the retaining wall showed a gradually increasing trend as the width of wall heel plate and wall toe plate increased; as the bottom plate thickness increases, the stability safety factor of the retaining wall gradually increases; as the soil-wall interface element reduction coefficient rises, that is, the internal friction angle of the soil-wall gradually increases to the soil internal friction angle, the stability safety factor of the retaining wall gradually increases; as the soil cohesion and internal friction angle increase, the stability safety factor of the retaining wall progressively increases. The safety factor of retaining wall increases by 0.45 for every 0.5m increase in the width of the wall heel plate; the safety factor of the retaining wall increases by 0.29 when the width of the wall toe plate increases by 0.5m; for every 0.5m increase in the width of wall plate thickness, the safety factor of the retaining wall is increased by 0.62; for every 0.25 increase in soil-wall interface element reduction coefficient, the safety factor of the retaining wall increases by 0.29; for every increase of 5KPa in soil cohesion, the safety factor of the retaining wall increased by 1.16; for every 5° increases in soil internal friction angle, the safety factor of retaining wall increases by 0.6. The research is significant for studying the failure laws and stability of retaining walls and providing references for retaining wall design.

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Quantifying Seismic Earth Pressure on Retaining Walls with Relief Shelves Using the Slip-Line Method

Que,

Zhang,

Xie

et al. 2024

Geotech Geol Eng

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Slip-Line Solution for the Active Earth Pressure of Narrow and Layered Backfills against Inverted T-Type Retaining Walls Rotating about the Base

Cited by 9 publications

References 19 publications

Discrete element analysis and analytical method on failure mechanism of retaining structures with narrow granular backfill

Discrete element analysis and analytical method on failure mechanism of retaining structures with narrow granular backfill

Study on the failure characteristics of sliding surface and stability analysis of inverted t-type retaining wall in active limit state

Quantifying Seismic Earth Pressure on Retaining Walls with Relief Shelves Using the Slip-Line Method

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