Rock and Soil Mechanics ›› 2021, Vol. 42 ›› Issue (2): 529-536.doi: 10.16285/j.rsm.2020.0754

• Geotechnical Engineering • Previous Articles     Next Articles

Field tests on thermo-mechanical response and bearing capacity of PHC energy pile under cooling-heating cyclic temperature

REN Lian-wei1, REN Jun-yang1, KONG Gang-qiang2, LIU Han-long3   

  1. 1. School of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China; 2. Key Laboratory of Geomechanics and Embankment Engineering, Ministry of Education, Hohai University, Nanjing, Jiangsu 210098, China; 3. College of Civil Engineering, Chongqing University, Chongqing 400045, China
  • Received:2020-06-04 Revised:2020-12-07 Online:2021-02-10 Published:2021-02-09
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51778212, U1810203).

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Abstract: Energy pile is a new building energy-saving technology, which has both functions of the bearing performance and the ground source heat pump heat exchanger. Based on the pile foundation engineering project of Zhoukou Normal University gymnasium in Henan province, field tests on the thermo-mechanical response and bearing capacity of PHC energy pile under cooling-heating cyclic temperature are carried out. The temperature and the strain of PHC energy pile are measured. The temperature-induced stress, side resistance, and heat exchange performance are analyzed and discussed. Test results show that: the distribution of the temperature-induced stress along pile depth varies greatly under cooling-heating cyclic temperature in this study. There is some negative shaft friction resistance developed in the upper part of the pile. The multiple relationship between the maximum thermal stress and temperature difference is 212 or 115 under summer or winter mode. Finally, a calculation formula of pile-soil friction coefficient considering temperature effect is proposed. Using this formula, the calculation method of bearing capacity of PHC energy pile is modified. The calculation results are in good agreement with field test results.

Key words: cyclic temperature, PHC energy pile, filed test, thermo-mechanical response, bearing capacity

CLC Number: 

  • TU 473.1
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[4] ZHANG Li-ting, QI Qing-lan, WEI Jing HUO Qian, ZHOU Guo-bin. Variation of void ratio in course of consolidation of warping clay[J]. , 2009, 30(10): 2935 -2939 .
[5] ZHANG Qi-yi. Study of failure patterns of foundation under combined loading[J]. , 2009, 30(10): 2940 -2944 .
[6] LU Zheng, YAO Hai-lin, LUO Xing-wen, HU Meng-ling. 3D dynamic responses of layered ground under vehicle loads[J]. , 2009, 30(10): 2965 -2970 .
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