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Probabilistic analysis of secant piles with random geometric imperfections

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 682-695 doi: 10.1007/s11709-021-0703-2

Abstract: The failure to achieve minimum design overlap between secant piles compromises the ability of a structureestablish a more realistic simulation and provide guidelines for designing a safe and cost-effective secant-pilewall, a three-dimensional model of a secant pile, considering the geometric imperfections of the diameterAn ultrasonic cross-hole test was performed during the construction of secant piles in a launching shaftpiles.

Keywords： secant piles     ultrasonic cross-hole testing     probabilistic analysis     reliability-based design     random    

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Displacement and force analyses of piles in the pile-caisson composite structure under eccentric inclined

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0957-y

Abstract: This study aims to investigate the displacement and force behavior of piles in a pile-caisson compositeinfluence of the groundwater level on the stability of the caisson was much greater than that of the piles

Keywords： composite structure     piles     foundation     suspension bridge     1g model test     finite-element analysis    

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Effects of inner sleeves on the inner frictional resistance of open-ended piles driven into sand

Janaka J. KUMARA,Yoshiaki KIKUCHI,Takashi KURASHINA,Takahiro YAJIMA

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4,   Pages 499-505 doi: 10.1007/s11709-016-0335-0

Abstract: In open-ended piles, inner friction is developed between inner pile shaft and the inner soil.which is influenced by many factors including pile diameter, relative density and end conditions of pilesThe experiments were conducted on a medium-dense sandy ground using laboratory-scale piles.It was observed that the piles penetrated under partially-plugged or unplugged state.sleeved piles.

Keywords： bearing capacity     inner frictional resistance     inner sleeve     open-ended piles     soil plugging    

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A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Frontiers of Structural and Civil Engineering   Pages 1021-1032 doi: 10.1007/s11709-023-0952-3

Abstract: In recent years, concrete and reinforced concrete piles have been widely used to stabilize soft grounddeformation mechanism and Poulos’ solution for pile–soil interaction to investigate the bending behavior of pilesThe results reveal that there are three possible bending failure scenarios for such piles: at the interfaceIn addition, floating piles that are not embedded exhibit an overturning pattern of movement in the softground layer, and a potential failure is located in the upper part of these piles.

Keywords： bending behavior     pile     embankment     soil−structure interaction     failure mode    

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Design and analyses of open-ended pipe piles in cohesionless soils

Yuan GUO,Xiong (Bill) YU

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1,   Pages 22-29 doi: 10.1007/s11709-016-0314-5

Abstract: To close this practice gap, this paper first summarized different design methods for open-ended pipe pilesshow that the arching effect significantly increases the internal unit shear resistance along pipe piles

Keywords： open-ended pipe pile     soil plug     DEM     base capacity    

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Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions

Frontiers of Structural and Civil Engineering   Pages 915-934 doi: 10.1007/s11709-023-0907-8

Abstract: A fictitious soil pile (FSP) model is developed to simulate the behavior of pipe piles with soil plugspredictions of the proposed model and conventional numerical models, as well as measurements for pipe piles

Keywords： fictitious soil pile     soil plug     pipe piles     high-strain dynamic analysis     one-dimensional wave theory    

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Analysis of effect of different construction methods of piles on the end effect on skin friction of piles

ZHOU Hongbo, CHEN Zhuchang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 458-463 doi: 10.1007/s11709-007-0062-7

Abstract: The test results of post-grouting piles indicate that the post-grouting technique is an effective way

Keywords： distance     different     concept     additional     bottom    

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Centrifuge model test on dynamic behavior of group-pile foundation with inclined piles and its numerical

ZHANG Feng, OKAWA Katsunori, KIMURA Makoto

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3,   Pages 233-241 doi: 10.1007/s11709-008-0033-7

Abstract: In this paper, dynamic behavior of a group-pile foundation with inclined piles in loose sand has beenalso simulated with elastoplastic dynamic finite element method, in which, not only sectional force of piles, stress of ground, but also deformation of piles are calculated using a three-dimensional elastoplasticDifferent types of piles, vertical pile or inclined pile, are considered in order to verify the differentcharacteristics of a group pile foundation with inclined piles.

Keywords： centrifuge     Different     three-dimensional elastoplastic     calculation     inclined    

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Model test of the group piles foundation of a high-speed railway bridge in mined-out area

Xin LIANG,Qian-gong CHENG,Jiu-jiang WU,Jian-ming CHEN

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4,   Pages 488-498 doi: 10.1007/s11709-016-0338-x

Abstract: Meanwhile, three types of data including the bearing behavior of piles, and the settlement law, and soilamong piles are investigated.body and the degree of downward tendency for the barycenter of side friction layout is obvious for piles

Keywords： high-speed railway     mined-out areas     goaf     group piles foundation     physical model test     bearing capacity     settlement    

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Numerical analysis of bearing behaviors of single batter piles under horizontal loads in various directions

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2,   Pages 224-237 doi: 10.1007/s11709-022-0914-1

Abstract: The horizontal bearing behavior of a single batter pile (SBP) is vital to its application in practical engineering; however, the horizontal responses of SBPs change with the directions of horizontal loads, and this phenomenon is rarely investigated. Therefore, the directional differences in the horizontal bearing behaviors of SBPs are investigated in this study. Four model tests are conducted to preliminarily examine the effects of the skew angle of horizontal loads on the horizontal bearing capacities and distributions of the bending moments of the SBPs. Subsequently, the differences in the responses of the SBPs under horizontal loads in various directions at full scale are analyzed comprehensively via finite-element (FE) analysis. The effects of the skew angle on SBP-soil interaction are discussed. Moreover, an empirical design method is proposed based on the FE analysis results to predict the bearing ratios of SBPs in medium-dense and dense sand while considering the effects of the skew angle, batter angle, and pile diameter. The method is confirmed to be effective, as confirmed by the close agreement between the predicting results with the model test (reported in this study) and centrifuge model test results (reported in the literature).

Keywords： single batter pile     skew horizontal load     model test     finite-element analysis     empirical design method    

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Numerical investigation of the ultimate lateral resistance of piles in soft clay

Konstantinos P. TZIVAKOS,Michael J. KAVVADAS

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 194-200 doi: 10.1007/s11709-014-0251-0

Abstract: The paper presents a numerical study on the undrained lateral response of a single, free-head, reinforced concrete pile in soft clays. Soil conditions simulating normally consolidated clays are examined—undrained shear strength increasing with depth—and the pile-soil interaction under static lateral loading is analyzed. The nonlinear ? curves proposed in literature for soft clays are imported into a beam-on-nonlinear-Winkler-foundation simulation in order to predict the pile head lateral load—displacement curve and the distribution of the horizontal displacement and bending moment along the pile. The striking differences among these methods require further investigation via 3D finite element analyses. The determination of the ultimate soil resistance from the results of the finite element analyses aims at providing the estimation of a range of values for the ultimate soil resistance coefficient with depth and the comparison of the derived values to the corresponding ones proposed by existing methodologies.

Keywords： laterally loaded     pile     soft clay     p?y curves     finite element method (FEM)    

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Bearing and uplift capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound

Mantu MAJUMDER, Debarghya CHAKRABORTY

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 537-551 doi: 10.1007/s11709-021-0708-x

Abstract: In the present study, the effectiveness of under-reamed piles in soft clay underlaid by stiff clay isThe bearing and uplift capacities of under-reamed piles are estimated through non-dimensional factorsThese factors increased remarkably and marginally compared to and of the piles without bulbs whenvariation of radial stress along the pile–soil interface, distribution of axial force in the under-reamed pilesstudy are expected to be useful for the estimation of the bearing and uplift capacities of under-reamed piles

Keywords： bearing capacity     uplift capacity     under-reamed pile     clay     limit analysis    

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Experimental study on pile-end post-grouting piles for super-large bridge pile foundations

Weiming GONG, Guoliang DAI, Haowen ZHANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 228-233 doi: 10.1007/s11709-009-0019-0

Abstract: The application of pile-end post-grouting piles for super-large bridge pile foundations in some importantThere are totally 21 test piles.varies from 2.5 m to 3 m, and the maximum length is 125 m; the bearing capacity of the post-grouting pilesThe results show that the bearing capacity of the piles are increased in different degrees after groutingdeduced based on the statistics analysis results of 57 test piles.

Keywords： self-balanced testing technique     pile-end post-grouting     bearing capacity     grouting technology    

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Study on the technology of rotary drilling rig used for bored piles

Li Lin,Min Feng

Strategic Study of CAE 2010, Volume 12, Issue 4,   Pages 33-36

Abstract: The diameter of bored piles is 2.0 m, and the length is 94 m.All the piles are constructed by rotary drilling rig.

Keywords： rotary drilling rig     construction     bored pile     technology     feature    

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The application of DX piles in the LNG storage tanks

He Dexin,Zhang Chengwei,Zheng Jianhua,He Jiantong and Zhang Xinsheng

Strategic Study of CAE 2012, Volume 14, Issue 1,   Pages 19-25

Abstract: field with hydraulic fill sand in upper soil layer and fine sand in the lower soil, we adopt straight pilesand DX piles in foundation of LNG storage tanks; a series of self-balanced load tests for piles areThe purpose is to determine the ultimate bearing capacities and settlement of piles, analyze its loadComparing DX piles with straight piles, we find that DX piles are superior in ultimate bearing capacitiesand settlement; at the same time, the length of DX piles can be reduced apparently.

Keywords： DX piles     skin friction resistances     tip resistances     ultimate bearing capacities     settlement    

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Title Author Date Type Operation

Probabilistic analysis of secant piles with random geometric imperfections

Journal Article

Displacement and force analyses of piles in the pile-caisson composite structure under eccentric inclined

Journal Article

Effects of inner sleeves on the inner frictional resistance of open-ended piles driven into sand

Janaka J. KUMARA,Yoshiaki KIKUCHI,Takashi KURASHINA,Takahiro YAJIMA

Journal Article

A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Journal Article

Design and analyses of open-ended pipe piles in cohesionless soils

Yuan GUO,Xiong (Bill) YU

Journal Article

Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions

Journal Article

Analysis of effect of different construction methods of piles on the end effect on skin friction of piles

ZHOU Hongbo, CHEN Zhuchang

Journal Article

Centrifuge model test on dynamic behavior of group-pile foundation with inclined piles and its numerical

ZHANG Feng, OKAWA Katsunori, KIMURA Makoto

Journal Article

Model test of the group piles foundation of a high-speed railway bridge in mined-out area

Xin LIANG,Qian-gong CHENG,Jiu-jiang WU,Jian-ming CHEN

Journal Article

Numerical analysis of bearing behaviors of single batter piles under horizontal loads in various directions

Journal Article

Numerical investigation of the ultimate lateral resistance of piles in soft clay

Konstantinos P. TZIVAKOS,Michael J. KAVVADAS

Journal Article

Bearing and uplift capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound

Mantu MAJUMDER, Debarghya CHAKRABORTY

Journal Article

Experimental study on pile-end post-grouting piles for super-large bridge pile foundations

Weiming GONG, Guoliang DAI, Haowen ZHANG

Journal Article

Study on the technology of rotary drilling rig used for bored piles

Li Lin,Min Feng

Journal Article

The application of DX piles in the LNG storage tanks

He Dexin,Zhang Chengwei,Zheng Jianhua,He Jiantong and Zhang Xinsheng

Journal Article