Performance of piles with different configurations subjected to slope deformation induced by seismic liquefaction

Mao, Wuwei; Liu, Bangan; Rasouli, Rouzbeh; Aoyama, Shogo; Towhata, Ikuo

doi:10.1016/j.enggeo.2019.105355

Cited by 25 publications

(7 citation statements)

References 27 publications

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“…Mao et al [34] found that the liquefied soil acting on the pile behaves like a viscous fluid, and the bending moment of the pile is proportional to soil velocities (i.e., shear strain rate), the lateral force of liquefied soil acting on the pile has rate-dependent characteristics. To present the rate-dependent nature in this simplified analysis method of pile-soil interaction, the thixotropic constitutive model describing the fluid characteristics of saturated sand was established by Wang et al [33] is used in this study.…”

Section: Thixotropic Fluid Constitutive Model Of Liquefiable Soilmentioning

confidence: 99%

“…et al [33] considered the soil fabric as a fluid net-type structure and presented a unified thixotropic fluid model describing the behavior of the liquefiable soil in response to cyclic loading. However, the previous simple analysis methods of pile-soil interaction only considered the strength reduction of soil, and the fluid characteristics i.e., the rate effect [34] of liquefied sand were ignored. Ignoring the rate-dependent effect in the analysis of liquefiable soil-pile interaction may underestimate the dynamic response of pile foundation, resulting in misjudgment of the seismic failure mechanism of pile foundation in the liquefaction field.…”

Section: Introductionmentioning

confidence: 99%

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Pseudo-static Simplified Analysis Method of the Pile-liquefiable Soil Interaction Considering Rate-dependent Characteristics

Zhang¹,

Ji²,

Gao³

et al. 2021

Preprint

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The lateral pressure generated by liquefied soil on pile is a critical parameter in the analysis of soil-pile interaction in liquefaction-susceptible sites. Previous studies have shown that liquefied sand behaves like a non-Newton fluid, and its effect on piles has rate-dependent properties. In this study, a simplified pseudo-static method for liquefiable soil-pile interaction analysis is proposed by treating the liquefied soil as a thixotropic fluid, which considers the rate-dependent behavior. The viscous shear force generated by the relative movement between the viscous fluid (whose viscosity coefficient varies with excess pore pressure and shear strain rate) and the pile was assumed to be the lateral load on the pile. The results from the simplified analysis show that the distribution of bending moment is in good agreement with experiments data. Besides, the effects of various parameters, including relative density, thickness ratio of non-liquefiable layer to liquefiable layer, and frequency of input ground motion, on the pile-soil rate-dependent interaction were discussed in detail.

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Section: Thixotropic Fluid Constitutive Model Of Liquefiable Soilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pseudo-static Simplified Analysis Method of the Pile-liquefiable Soil Interaction Considering Rate-dependent Characteristics

Zhang¹,

Ji²,

Gao³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Wang et al [35] considered the soil fabric as a uid net-type structure and presented a uni ed thixotropic uid model describing the behavior of the lique able soil in response to cyclic loading. However, the previous simple analysis methods of pile-soil interaction only considered the strength reduction of soil and the uid characteristics, i.e., the rate e ect [36] of lique ed sand were ignored. Ignoring the rate-dependent e ect in the analysis of lique able soil-pile interaction may underestimate the dynamic response of pile foundation, resulting in misjudgment of the seismic failure mechanism of pile foundation in the liquefaction eld.…”

Section: Introductionmentioning

confidence: 99%

Pseudo-static Simplified Analysis Method of the Pile-liquefiable Soil Interaction Considering Rate-dependent Characteristics

Zhang¹,

Ji²,

Gao³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…(Tang et al 2018) studied the influence of pile length, position of pile sheet, pile stiffness and soil properties on the performance of piles. (Li et al 2019;Mao et al 2019) found that the deformation patterns of adjacent piles in pile groups are different, resulting in different degrees of axial forces and bending moments. Piles in the shear zone will separate and pile groups will be destroyed with the increase of fault displacement.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design and Numerical Analysis of Soil Slope Reinforcement by a New Developed Polymer Micro Anti-slide Pile

Wang

Han

et al. 2021

Preprint

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As a new material, polyurethane polymer has been widely used in engineering in recent years due to the excellent engineering mechanical properties. Based on the characteristics of this material, a multi pipe grouting micro anti-slide pile is proposed, which is formed by using polymer slurry as grouting material. Compared with traditional anti-slide pile, the polymer micro pile has the advantages of strong applicability, no water reaction, small disturbance, fast construction, economy and durability. As a flexible retaining structure, polymer micro-piles can strengthen the slope by cooperating with the forces. However, there is no report on the reinforcement of slope by polymer micro piles at present. In this paper, a three-dimensional multi row polymer micro piles model for slope reinforcement considering different embedded depth and pile location is established. Safety factor, thrust force of landslide behind pile, length of pile and mises stress are taken as four factors to evaluate reinforcement effect, the optimal reliability of polymer micro anti-slide pile for slope reinforcement is evaluated by giving different weight values to each factor through multi factor comprehensive evaluation method. The safety factor of slope (Fs), landslide thrust behind pile and mises stress of pile are analyzed under different embedded depth (le) and pile position (px). The results show that the best embedded depth is about1/8 − 1/12 of the horizontal length of the landslide behind the pile when multi row polymer micro piles are used to reinforce the slope; the optimum position of pile arrangement is 0.55–0.65 times the slope length from the top of the slope.

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Performance of piles with different configurations subjected to slope deformation induced by seismic liquefaction

Cited by 25 publications

References 27 publications

Pseudo-static Simplified Analysis Method of the Pile-liquefiable Soil Interaction Considering Rate-dependent Characteristics

Pseudo-static Simplified Analysis Method of the Pile-liquefiable Soil Interaction Considering Rate-dependent Characteristics

Pseudo-static Simplified Analysis Method of the Pile-liquefiable Soil Interaction Considering Rate-dependent Characteristics

Optimal Design and Numerical Analysis of Soil Slope Reinforcement by a New Developed Polymer Micro Anti-slide Pile

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