IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v14y2021i21p6881-d660961.html
   My bibliography  Save this article

Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model

Author

Listed:
  • Lichen Li

    (Faculty of Engineering, Zhejiang Institute, China University of Geosciences, Wuhan 430074, China)

  • Longlong Dong

    (Faculty of Engineering, Zhejiang Institute, China University of Geosciences, Wuhan 430074, China)

  • Chunhua Lu

    (Faculty of Engineering, Zhejiang Institute, China University of Geosciences, Wuhan 430074, China)

  • Wenbing Wu

    (Faculty of Engineering, Zhejiang Institute, China University of Geosciences, Wuhan 430074, China
    Research Center of Coastal Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China)

  • Minjie Wen

    (Research Center of Coastal Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China)

  • Rongzhu Liang

    (Research Center of Coastal Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China)

Abstract

Energy piles are an emerging energy technology for both structural and thermal purposes. To support structure load, piles are always used in groups with raft; however, the cost and complexity of field tests and numerical modelling limits the research on the bearing characteristics of energy pile group. In this paper, exponential model was applied to simulate the thermo-mechanical soil-pile interaction of energy pile group. Axial load transfer ( τ - z ) analysis was first performed to calculate the shear stress distribution in the soil, then matrix displacement method was introduced to determine the thermo-mechanical response of energy pile group. The validity of the analytical model was tested against field tests and numerical results. A case study was further performed to analyze the influence of thermal cycles and arrangement of thermally active piles on the bearing response of the whole pile group. Test results show that with the thermally activated pile in pile group, (1) differential settlement increases with thermal cycle numbers; (2) the axial force of thermally active pile increases during heating process and decreases during cooling process, and this trend varies for the surrounding nonthermal piles; (3) induced load on thermal pile increases with thermal cycles, but decreases for nonthermal piles. The proposed analytical model is expected to serve as a simple and convenient alternative for the preliminary analysis on the bearing characteristics of energy group pile.

Suggested Citation

  • Lichen Li & Longlong Dong & Chunhua Lu & Wenbing Wu & Minjie Wen & Rongzhu Liang, 2021. "Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model," Energies, MDPI, vol. 14(21), pages 1-16, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:6881-:d:660961
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/14/21/6881/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/14/21/6881/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Borja Badenes & Teresa Magraner & Cristina De Santiago & Fernando Pardo de Santayana & Javier F. Urchueguía, 2017. "Thermal Behaviour under Service Loads of a Thermo-Active Precast Pile," Energies, MDPI, vol. 10(9), pages 1-15, September.
    2. Linden Jensen-Page & Fleur Loveridge & Guillermo A. Narsilio, 2019. "Thermal Response Testing of Large Diameter Energy Piles," Energies, MDPI, vol. 12(14), pages 1-25, July.
    3. Charles Maragna & Fleur Loveridge, 2021. "A New Approach for Characterizing Pile Heat Exchangers Using Thermal Response Tests," Energies, MDPI, vol. 14(12), pages 1-18, June.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ai, Zhi Yong & Feng, Wei Yong, 2024. "The mechanical response of energy pile groups in layered cross-anisotropic soils under vertical loadings," Energy, Elsevier, vol. 292(C).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Tomasz Sliwa & Kinga Jarosz & Marc A. Rosen & Anna Sojczyńska & Aneta Sapińska-Śliwa & Andrzej Gonet & Karolina Fąfera & Tomasz Kowalski & Martyna Ciepielowska, 2020. "Influence of Rotation Speed and Air Pressure on the Down the Hole Drilling Velocity for Borehole Heat Exchanger Installation," Energies, MDPI, vol. 13(11), pages 1-18, May.
    2. Charles Maragna & Fleur Loveridge, 2021. "A New Approach for Characterizing Pile Heat Exchangers Using Thermal Response Tests," Energies, MDPI, vol. 14(12), pages 1-18, June.
    3. Joanna Piotrowska-Woroniak, 2021. "Assessment of Ground Regeneration around Borehole Heat Exchangers between Heating Seasons in Cold Climates: A Case Study in Bialystok (NE, Poland)," Energies, MDPI, vol. 14(16), pages 1-32, August.
    4. Liu, Ryan Yin Wai & Taborda, David M.G., 2024. "The effects of thermal interference on the thermal performance of thermo-active pile groups," Renewable Energy, Elsevier, vol. 225(C).
    5. Joanna Piotrowska-Woroniak, 2021. "Determination of the Selected Wells Operational Power with Borehole Heat Exchangers Operating in Real Conditions, Based on Experimental Tests," Energies, MDPI, vol. 14(9), pages 1-21, April.
    6. Tomasz Sliwa & Aneta Sapińska-Śliwa & Tomasz Wysogląd & Tomasz Kowalski & Izabela Konopka, 2021. "Strength Tests of Hardened Cement Slurries for Energy Piles, with the Addition of Graphite and Graphene, in Terms of Increasing the Heat Transfer Efficiency," Energies, MDPI, vol. 14(4), pages 1-20, February.
    7. Norma Patricia López-Acosta & Alan Igor Zaragoza-Cardiel & David Francisco Barba-Galdámez, 2021. "Determination of Thermal Conductivity Properties of Coastal Soils for GSHPs and Energy Geostructure Applications in Mexico," Energies, MDPI, vol. 14(17), pages 1-14, September.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:6881-:d:660961. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.