Determination of traffic-load-influenced depths in clayey subsoil based on the shakedown concept

Tang, Liansheng; Chen, HaoKun; Sang, Hanfei; Zhang, SiYang; Zhang, JieYi

doi:10.1016/j.soildyn.2015.05.009

Cited by 48 publications

(13 citation statements)

References 37 publications

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“…Regarding foundations or road constructions the weakest link is subgrade soils [6]. The traffic loading is a good example of a certain choice, which geotechnical designers need to take [7][8][9]. When thick embankments are designed, the repeating loading can be transmitted to the subgrade soils, which will result in unknown settlements.…”

Section: Introductionmentioning

confidence: 99%

“…The excessive settlements and uneven settlements were the reason for withdrawal from the use of road constructions as well as buildings. Currently, researchers and scholars have focused on road construction problems [2,[7][8][9][10][11][12][13] as well as on pore pressure development of excess pore water pressure under irregular seismic loading [14,15]. The cyclic loading phenomena were divided into few categories where the attention of researchers is focused.…”

Section: Introductionmentioning

confidence: 99%

“…The cyclic loading phenomena were divided into few categories where the attention of researchers is focused. The permanent strain development was studied in order to appoint the threshold stress under which the permanent deformation will stop and the plastic shakedown will occur [2,7,8]. The second main focus subject is pore pressure development during undrained cyclic loading.…”

Section: Introductionmentioning

confidence: 99%

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Undrained Pore Pressure Development on Cohesive Soil in Triaxial Cyclic Loading

et al. 2019

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Cohesive soils subjected to cyclic loading in undrained conditions respond with pore pressure generation and plastic strain accumulation. The article focus on the pore pressure development of soils tested in isotropic and anisotropic consolidation conditions. Due to the consolidation differences, soil response to cyclic loading is also different. Analysis of the cyclic triaxial test results in terms of pore pressure development produces some indication of the relevant mechanisms at the particulate level. Test results show that the greater susceptibility to accumulate the plastic strain of cohesive soil during cyclic loading is connected with the pore pressure generation pattern. The value of excess pore pressure required to soil sample failure differs as a consequence of different consolidation pressure and anisotropic stress state. Effective stresses and pore pressures are the main factors that govern the soil behavior in undrained conditions. Therefore, the pore pressure generated in the first few cycles plays a key role in the accumulation of plastic strains and constitutes the major amount of excess pore water pressure. Soil samples consolidated in the anisotropic and isotropic stress state behave differently responding differently to cyclic loading. This difference may impact on test results analysis and hence may change the view on soil behavior. The results of tests on isotropically and anisotropically consolidated soil samples are discussed in this paper in order to point out the main features of the cohesive soil behavior.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Undrained Pore Pressure Development on Cohesive Soil in Triaxial Cyclic Loading

et al. 2019

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“…Above this level, a soil fails after dozens of cycles. According to the shakedown concept, Tang et al (2015) proposed three cyclic stress limits of the soft clay subsoil and used to determine the corresponding depths of influence [14]. Although a number of investigations have considered the effects of cyclic loading on soil behaviour, but the threshold cyclic stress ratio have not been adequately investigated, relatively few have addressed the effect of overconsolidation ratio.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cyclic Stress Level and Overconsolidation Ratio on Permanent Deformation Behaviour of Clayey Subsoil

Sun

2018

CivileJournal

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This paper presents the results of a series of one-way cyclic triaxial tests carried out to investigate the role of cyclic stress level and overconsolidation ratio (OCR) on the permanent deformation behaviour of saturated clayey subsoil during long-term cyclic loading. Based on the test results and shakedown concept, two cyclic threshold deviator stress ratios can be defined: the plastic shakedown limit cyclic deviator stress ratio CSRpt (0.46) and the plastic creep shakedown limit cyclic deviator stress ratio CSRpc (0.75). It was found that, below CSRpt, the soil experiences slight deformation and gradually achieves a long-term steady state response. Within the range of CSRpt<CSR<CSRpc, the plastic strain will accumulates substantially and becomes unstable. Once the CSRpc is exceeded significant deformation and failure may occur. In the practical engineering, CSRpt can be used for preliminary design of pavement foundation. In addition, based on the test results, a simplified permanent axial strain model that explicitly considers the effects of CSR and OCR is developed.

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“…Studies under clayey subsoil traffic-load-influenced depths employed shakedown concept to distinguish three depths of cyclic traffic load influence: the threshold depth beyond which traffic loads becomes negligible, the plastic shakedown limit depth where subgrade experiences continuous deformation and the critical failure depth where subsoil will fail due to excessive strain (Tang et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Energy-based analysis of permanent strain behaviour of cohesive soil under cyclic loading

et al. 2017

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In this paper the original results of uniaxial cyclic compression test on cohesive soil are presented. The shakedown phenomena in cohesive soil are described. Energy-based method highlights the change of soil material behaviour from plastic shakedown through plastic creep shakedown to incremental collapse. The samples were cyclically loaded under undrained conditions with the constant amplitude of stress in one-way test procedure. In this study the energy-based method was presented as a proper method to categorise response of cohesive soil to cyclic loading in uniaxial conditions. A shakedown criterion factor, S E , was introduced to help understand the shakedown phenomena in cohesive soil. In cohesive soils the absence of a limit between plastic shakedown and plastic creep shakedown was pointed out.

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Determination of traffic-load-influenced depths in clayey subsoil based on the shakedown concept

Cited by 48 publications

References 37 publications

Undrained Pore Pressure Development on Cohesive Soil in Triaxial Cyclic Loading

Undrained Pore Pressure Development on Cohesive Soil in Triaxial Cyclic Loading

Effect of Cyclic Stress Level and Overconsolidation Ratio on Permanent Deformation Behaviour of Clayey Subsoil

Energy-based analysis of permanent strain behaviour of cohesive soil under cyclic loading

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