The paper describes the thermo-mechanical behaviour of an experimental pre-cast driven pile, properly instrumented and prepared to operate as a heat exchanger foundation element under the simultaneous action of mechanical and thermal loads. Firstly, in situ static vertical load tests were carried out to analyse the pile mechanical behaviour. Afterwards, two thermal tests were performed under constant mechanical load. The first thermal test was carried out to characterise the pile–ground system. By means of the second thermal test, the conditions of the pile in a geothermal installation of an office building operating in cooling mode were simulated. The influence of the thermal loads on the structural and geotechnical performance of the pile was subsequently analysed. Heating the pile leads to increases in axial and end-bearing loads, changes in shear stresses distribution and reduction of factors of safety for compressive ground resistance and for structural resistance of the pile.

中文翻译：

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热负荷对西班牙巴伦西亚预制混凝土热电堆的影响

本文描述了一个实验性的预制打桩桩的热机械行为，该桩经过适当的配置并准备在机械和热负荷的同时作用下作为热交换器的基础元件。首先，进行了静态静载荷试验，以分析桩的力学性能。之后，在恒定的机械负载下进行了两次热测试。进行了首次热测试，以表征桩土系统。通过第二次热测试，模拟了在以制冷模式运行的办公楼的地热设施中桩的状况。随后分析了热负荷对桩的结构和岩土性能的影响。加热桩会导致轴向载荷和端轴承载荷增加，