Group effect of dragload in pile groups embedded in consolidating soil under embankment load

Kong, Gangqiang; Zhou, Yang; Yang, Qing

doi:10.1007/s12205-015-0312-5

Cited by 12 publications

(2 citation statements)

References 23 publications

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“…Many researchers [5]; [6]; [7] found that the piles within a group may suffer some reduction in capacity compared with single isolated piles due to interaction effects. The behavior of an individual pile within the group is different from that of a single pile, and several factors may be influenced by the behavior of group piles [8].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Model Group Piles Subjected to Lateral Soil Movement in Sand

Ibrahim¹

2018

GEOMATE

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Laboratory model tests have been carried out to explore the behavior of piles subjected to lateral soil movement in the sand. The results of a single pile test and ten tests on of group piles arranged in a row (perpendicular to the direction of soil movement) are presented. Different parameters were utilized in these tests, (e.g., pile spacing, number of piles within a group and pile head condition). Group effect was calculated using group factor (F m ) which is defined in terms of the measured maximum bending moments of an individual with the group and that of the single pile. The results showed that the maximum bending moment of group piles decreases from the single pile with decreasing pile spacing and the pile behaves essentially the same as a single pile when the pile spacing is 7d or more. The maximum reduction of the maximum bending moments of about (17%) and (28%) as compared with that for the standard single pile may be observed for a pile spacing of 3d for the free and capped headed condition, respectively. The number of piles does not appear to have a significant effect on the group factor F m of piles, except for the free headed inner piles who's the group factors appear to decrease with increasing the number of piles within a group.

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Section: Introductionmentioning

confidence: 99%

Behavior of Model Group Piles Subjected to Lateral Soil Movement in Sand

Ibrahim¹

2018

GEOMATE

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“…Abdrabbo [12] acquired the effect of pile top load and soil layer additional load through three-dimensional nonlinear analysis. Kong [13] acquired the results that when the relative displacement reaches to 2mm, the negative friction account for 75-95 percent of the maximum and the neutral surface becomed steady when the consolidation time was 240 hours through model tests and numerical analysis. Hong [14] discovered that the depth of neutral point of drilled pile equaled to 0.04-0.06H (H was the thickness of clay layer).…”

Section: Introductionmentioning

confidence: 99%

Experiment on the Negative Friction of Single Pile under Self-weight Consolidation for the Dredger Fill

Yang¹,

Xue²,

Liu³

2018

2018 2nd International Conference on Computer Science and Intelligent Communication (CSIC 2018)

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The objective of this paper is to analyze the negative friction of pile caused by the self-weight consolidation of dredger fill. It is difficult for routine test to meet the time requirement of self-weight consolidation of soil. However, the centrifugal test model adopted the scale-shrink effect and the model satisfied the requirement of pile-soil consolidation in a short time. Thus the self-weight consolidation of the dredger fill at the upper part of the single pole foundation in the soft soil was simulated by the centrifugal model test. The result of the experiment showed that when the self-weight consolidation of dredger fill sustained for 2.5, 20, 50 months, the negative friction was 85.6%, 52.67%, 20.65% of the pile top load. The negative friction disappeared when the self-weight consolidation sustained for 75 months. The relationship between pile-soil settlement and time corresponds with the Hill Model. It is feasible to forecast the pile-soil settlement of the self-weight consolidation of stacking dredger fill through the Hill Model.

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