ORCID Profile
0000-0002-1052-388X
Current Organisations
China University of Mining and Technology
,
Queensland University of Technology
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Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2017
Publisher: Elsevier BV
Date: 11-2023
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2020
Publisher: Elsevier BV
Date: 09-2023
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2019
Publisher: FapUNIFESP (SciELO)
Date: 2019
Publisher: Thomas Telford Ltd.
Date: 10-2023
Abstract: Composite pile with a stiffer core and gravel shell is a newly emerging column technology to improve soft soil by combining the advantages of accelerating consolidation and increasing loading bearing capacity. In practice, the composite piles may be constructed into various forms with different cross-sectional shapes. Moreover, soft soil particles may be transferred along with the seepage and intrude into the gravel shell and thereby clog them. In this paper, by converting the noncircular cross-sectional composite pile into a hollow cylindrical unit cell and considering the time-dependent clogging effect, an analytical model for the consolidation of composite ground stabilized by composite piles is proposed. Analytical solutions are then obtained for instantaneous loading and multi-stage instantaneous loading under the equal-strain condition. Moreover, the variation of the stress with depth caused by surcharge loading is also incorporated in the analysis. The feasibility of the solutions is verified by degenerating them to some previous solutions. Furthermore, the solutions are applied to a laboratory test to investigate consolidation. The predicted results are compared to the measured data and a good agreement is observed between them. Finally, a parametric study is conducted to investigate the influence of several parameters on consolidation behavior.
Publisher: Wiley
Date: 08-02-2016
DOI: 10.1002/NAG.2508
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 12-2017
Publisher: Wiley
Date: 11-01-2018
DOI: 10.1002/NAG.2770
Publisher: Wiley
Date: 24-04-2023
DOI: 10.1002/NAG.3540
Abstract: Air‐boosted vacuum preloading is a newly emerging soft soil‐improving technology and increasingly draws attention of researchers and engineers. However, few analytical theories are available in the literature to facilitate the design and calculation of it in practice. To fill this gap, an analytical model for the consolidation of soft ground improved by air‐boosted vacuum preloading is proposed based on the assumption of equal volumetric strain and Darcy's law. Moreover, a time‐dependent clogging effect is taken into consideration to describe the gradual reduction in the drainage capacity of prefabricated vertical drains (PVDs) during the consolidation process. In addition, the smear effect is also considered due to the installation of PVDs. An air booster pipe and the surrounding PVDs are introduced into the unit cell for analysis based on the principle of equal cross‐sectional area, and analytical solutions under two typical time‐dependent horizontal loading are then developed. A comparison is made with the existing analytical model of conventional vacuum consolidation, which indicates that air‐boosted vacuum preloading can promote the consolidation of soft soil more effectively than conventional vacuum preloading. Furthermore, the obtained solution under instantaneously loading is used to investigate the influence of several parameters on consolidation behavior. Finally, to verify the accuracy of the analytical model with or without clogging effect, a comparative study is carried out with a field test.
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2023
Publisher: Elsevier BV
Date: 02-2020
Publisher: Elsevier BV
Date: 07-2023
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2023
Publisher: Elsevier BV
Date: 2024
Publisher: Elsevier BV
Date: 02-2021
Publisher: Informa UK Limited
Date: 12-06-2020
Publisher: Elsevier BV
Date: 11-2022
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2023
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2023
No related grants have been discovered for Mengmeng LU.