Abstract：To reveal the influence of temperature on the mechanical properties of energy piles，a traditional hyperbolic model for pile-soil interface load transfer was revised by considering the influence of the normal temperature stress increment on the initial shear stiffness at the interface of pile and soil. The temperature field distributions in the pile body and surrounding soil were assumed，and the normal temperature stress of the pile-soil interface was calculated，then the load-transfer model of pile-soil interfaces considering the influence of temperature was established. The bearing capacity of energy piles in the typical soft clay in Ningbo area was studied by modelling test. The experimental results were compared with the calculated results. It is shown that the temperature helps to improve the bearing capacity of the energy pile，and that the calculated results of Q-s curve are consistent with the measured values，which verifies the rationality of the load transfer model of the energy pile considering the influence of temperature. The operation of energy piles leads to temperature increasing in pile and soil，and the normal stress between pile and soil increase too，which cause the shaft resistance of the upper part of the energy pile(above 0.7 m) to increase with temperature (30 ℃→45 ℃→60 ℃) under the same conditions of calculation，but in the lower part，the opposite occurs.
骆湘勤，刘干斌，郑言东，钱 峰，周 敏. 考虑温度影响的能源桩桩–土界面荷载传递模型[J]. 岩石力学与工程学报, 2019, 38(1): 171-179.
LUO Xiangqin，LIU Ganbin，ZHENG Yandong，QIAN Feng，ZHOU Min. A load transfer model of energy pile-soil interfaces under temperature variation. , 2019, 38(1): 171-179.
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2019, Vol. 38 
