Comparative Analysis of Load Responses and Deformation for Crust Composite Foundation and Pile-supported Embankment

Wang, Ying; Chen, Yonghui; Hu, Zhenhua; Feng, Qiang; Kong, Desen

doi:10.17576/jsm-2017-4611-25

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…Model material and centrifuge modeling procedure were described in detail by Wang et al [30,31]. In this study, pore water pressure sensors and strain gauges were used, in addition to measuring soil and pile motion.…”

Section: Centrifuge Model Testingmentioning

confidence: 99%

Two‐Dimensional Parametric Study of an Embankment on Clay Improved by an Artificial Crust Composite Foundation

Wang

Chen

et al. 2020

Advances in Civil Engineering

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In order to reduce the foundation settlement, conserve resources, and be environmental-friendly while increasing the use of soil resources, an artificial crust layer formed by in situ stabilization is proposed to combine with prestressed pipe piles over soft ground in road construction. In this study, a centrifuge test and two-dimensional coupled-consolidation finite-element analyses are conducted to simulate the construction of an embankment. And a two-dimensional parametric study is conducted to study the performance indicated by maximum long-term settlement, excess pore water, and tensile stress under various conditions. The results of the centrifuge test clearly show that the measured settlement, excess pore water, and tensile stress are in good agreement with the calculated results. In addition, the key factors of pile spacing and thickness and strength of the crust have an influence on the maximum settlement, stress of the foundation, and tensile stress of the crust using the two-dimensional coupled-consolidation finite-element analyses. And the stress transfer regular of the foundation is analyzed under various conditions. Moreover, the failure of the crust contained tensile cracking and shearing failure and the thickness of the pile that pierced the crust are also affected by the key factors.

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Section: Centrifuge Model Testingmentioning

confidence: 99%

Two‐Dimensional Parametric Study of an Embankment on Clay Improved by an Artificial Crust Composite Foundation

Wang

Chen

et al. 2020

Advances in Civil Engineering

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Settlement and Stress Analysis of Soil–Cement Column-Reinforced Foundation under an In Situ Stabilized Layer

et al. 2021

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Vertical Load Transfer Behavior of Composite Foundation and Its Responses to Adjacent Excavation: Centrifuge Model Test

2021

Geotechnical Testing Journal

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In urban construction, more and more foundation pit excavations are adjacent to existing buildings with composite foundations. Therefore, it is necessary to study the interaction between foundation piles and supporting structures. In this article, a centrifuge model test has been carried out to study the vertical load transfer behavior of composite foundation with rigid piles and its responses to adjacent excavation. The test model was designed based on a real excavation project adjacent to an existing composite foundation. The sand pluviation method was used to build the foundation model. An in-flight excavation method and a loading device for multilevel uniform surface load were used in the test. Finally, the variations of induced axial force, pile skin friction, and pile-soil stress ratio along with the depth were investigated. Some useful conclusions can be drawn as follows: (1) the negative skin friction in the upper part of piles, induced by the overlaying load, increases first and then decreases along with the depth; (2) pile-soil stress ratio decreases along with the depth under initial loads, while it increases first and then decreases when the load is larger; (3) pile-soil stress ratio always increases with loads in the same depth, indicating that mobilized skin friction of piles is continuously developed; and (4) more significant changes of the axial force, skin friction, and pile-soil stress ratio of composite foundation piles are observed in the shallow soil and for the later excavation stage. Therefore, the deformation of the foundation pit should be strictly controlled during the later excavation stages.

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Comparative Analysis of Load Responses and Deformation for Crust Composite Foundation and Pile-supported Embankment

Abstract: Ground improvement using artificial crust composite foundation, consisting of stabilization of soft clay and composite foundation, is an

Cited by 3 publications

References 22 publications

Two‐Dimensional Parametric Study of an Embankment on Clay Improved by an Artificial Crust Composite Foundation

Two‐Dimensional Parametric Study of an Embankment on Clay Improved by an Artificial Crust Composite Foundation

Settlement and Stress Analysis of Soil–Cement Column-Reinforced Foundation under an In Situ Stabilized Layer

Vertical Load Transfer Behavior of Composite Foundation and Its Responses to Adjacent Excavation: Centrifuge Model Test

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