Nonlinear analysis of laterally loaded rigid piles in cohesive soil

Zhang, Lianyang; Ahmari, Saeed

doi:10.1002/nag.1094

Cited by 39 publications

(7 citation statements)

References 55 publications

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“…In the current analysis two parameters related to the soil reactions are needed: the horizontal subgrade reaction modulus k h and the ultimate pile-soil contacting pressure p u . k h depends not only on the soil elastic modulus E s , but also on the relative stiffness of the soil-structure interaction system (Zhang and Ahmari, 2013). Many k h -E s relations were proposed by previous studies of laterally loaded piles.…”

Section: Idealized Ground Model For Landslides In Cohesive Soilsmentioning

confidence: 99%

“…Many k h -E s relations were proposed by previous studies of laterally loaded piles. As summarized by Zhang and Ahmari (2013), k h /E s ranges from 0.48 to 2. This paper intends to study the pile-soil interaction in a nondimensional scale as a function of the ratio of k h between the sliding soil and the stable soil.…”

Section: Idealized Ground Model For Landslides In Cohesive Soilsmentioning

confidence: 99%

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Non-dimensional solutions for the stabilising piles in landslides in layered cohesive soils considering non-linear soil–pile interactions

Lei

Cabrera

2022

Géotechnique

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The pile response is of great importance to the effectiveness of a row of piles used as a landslide mitigation method. However, the current classifications of the pile responses and failure modes do not consider the effects of soil displacement and the relative pile rigidity. This paper attempts to improve this using a nondimensional model based on a simplified ground consisted of two layers of cohesive soils. A hyperbolic p-y model is adopted to consider nonlinear soil reactions. The calculations of three case histories show that the proposed model predicts the pile responses well. The dependencies for obtaining a pile response with maximum pile resistance have been identified and the influencing factors have been examined. The efficacy of the proposed approach has been demonstrated by the satisfactory result that it achieves in reproducing the more complex 3D finite-element analyses. The application of the nondimensional solutions indicates that it can increase the efficiency of the preliminary pile design.

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Section: Idealized Ground Model For Landslides In Cohesive Soilsmentioning

confidence: 99%

Section: Idealized Ground Model For Landslides In Cohesive Soilsmentioning

confidence: 99%

Non-dimensional solutions for the stabilising piles in landslides in layered cohesive soils considering non-linear soil–pile interactions

Lei

Cabrera

2022

Géotechnique

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“…Similarly for piles in the elastic soil zone, the deflection of the wth pile slice of the ith pile segment in the elastic zone can be obtained by solving equation (24).…”

Section: Analysis Of the Elastic Zonementioning

confidence: 99%

“…e capacity of the pressure-based methods to reflect the real passive pile behavior is closely related to the load transfer model employed for predicting the soil-pile interactions. Different soil-pile interaction models have been proposed to evaluate the responses of laterally loaded pile [20][21][22][23][24]. For passively loaded piles, Ito et al proposed a theoretical method for analyzing the growth mechanism of lateral forces acting on stabilizing piles based on plastic deformation theory [25].…”

Section: Introductionmentioning

confidence: 99%

A Semianalytical Solution for Passively Loaded Piles Adjacent to Surcharge Load

Zhang

Shi

Yang

et al. 2020

Advances in Civil Engineering

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Piles adjacent to a surcharge load commonly support not only active loads from superstructures but also the passive loads caused by soil lateral movement. To investigate the influence of passive load and the response along pile shafts of existing actively loaded piles, a load transfer model for analyzing the soil-pile interaction was developed based on plastic deformation theory and the triparameter soil model. An analytical solution for the deformation and internal force of such piles was proposed using the transfer matrix method, in which the transfer matrix coefficients for piles in free, plastic, and elastic zones were analytically obtained by considering the second-order axial force effect caused by lateral loading and soil yielding based on the triparameter soil model. The proposed methodology was validated by comparing its predictions with field measurements and previously published results. A good match between model predictions, field measurements, and previously published results implies that the proposed method can be used to evaluate the response of passive piles adjacent to a surcharge load. Parametric studies were also carried out to investigate the influence of surcharge pressure, soil resistance, and boundary conditions on the behavior of passively loaded piles adjacent to a surcharge load.

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“…Considering that the API model is based on limited data, McGann et al (2011) and Rahmani et al (2018) conducted research on its applicability. Zhang (2009) modified the elastic model using the yield factor to account for the nonlinearity of the foundation. Based on the improved wedge model, Kim et al (2011) proposed a hyperbolic model suitable for large diameter piles.…”

Section: Introductionmentioning

confidence: 99%

Analytical solution of seismic analysis of piled-reinforced slopes

Tao

Jia

Bian

et al. 2021

Bull Eng Geol Environ

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Stabilizing piles is a typical passive reinforcement measure that is widely used in slope and foundation excavation. In slope stability analysis, the force of a stabilizing pile is often taken as the fixed value. Obviously, this approach simplifies the impact of stabilized piles on the slope. Based on the passive effect of stabilizing piles, this study elaborates on the sliding mechanism of slopes under seismic conditions. To establish the relationship between the slope displacement and the force of the pile, a new method of equivalent displacement is proposed. The Newmark method and limit analysis are used to derive the formulas of slope displacement and safety factor. Through typical cases, different stabilizing pile models and the cumulative effect of multiple seismic loads are analyzed. In addition, the influence of various parameters on slope stability is discussed. The results show that (1) the stabilizing pile has an obvious passivity. The antisliding force is gradually released with the sliding and squeezing of the slope, showing the trend of increasing first and then stabilizing. (2) Under the condition of multiple seismic loads, the slope has a cumulative effect. If the passive effect of the pile is considered, the calculation result is more conservative. (3) The location of the pile and the length of the anchoring section have a more significant influence on the slope stability. Risk analysis based on displacement can be used in the design of reinforcement schemes.

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Nonlinear analysis of laterally loaded rigid piles in cohesive soil

Cited by 39 publications

References 55 publications

Non-dimensional solutions for the stabilising piles in landslides in layered cohesive soils considering non-linear soil–pile interactions

Non-dimensional solutions for the stabilising piles in landslides in layered cohesive soils considering non-linear soil–pile interactions

A Semianalytical Solution for Passively Loaded Piles Adjacent to Surcharge Load

Analytical solution of seismic analysis of piled-reinforced slopes

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