Geothermal pavements represents a novel approach to shallow geothermal energy applications, in which horizontal ground heat exchangers are implemented within the pavement structure instead of traditional purpose-built trenches, thus decreasing capital costs. This study aims to better understand the feasibility and potential of these systems, by investigating the thermal response of the ground in a full scale geothermal pavements system, the first of its kind in Australasia. For this purpose, a fully instrumented geothermal pavements segment, measuring 20 m × 10 m, was constructed in the city of Adelaide, Australia. The geothermal pavement was subjected to Thermal Response Testing (TRT) and numerical modelling is adopted herein and validated using TRT data to further understand the ground response. In addition to providing insights on the capacity of energy provision for geothermal pavements, this work also introduces and discusses various methods of TRT data analysis for the geothermal pavement, specifically for obtaining the effective ground thermal conductivity, a key parameter in shallow geothermal design. The results indicate that from the considered methods, the conventional semi-log method can lead to overestimation of thermal conductivity, the guarded hot plate model tends to underestimate its value and detailed numerical modelling is most accurate, but computationally more expensive. The results also show that the radius of influence of the geothermal pavement in the examined case is close to 0.5 m and even though the geothermal pavement is considerably affected by the ambient temperature, it can be a viable solution for heating and cooling purposes, showing a heat exchange of 50.2 W/m² and a rate per length of the pipe of 25 W/m in the case analysed here.

地热路面代表了浅层地热能应用的一种新方法，其中在路面结构内实施水平地热交换器，而不是传统的专用沟渠，从而降低资本成本。本研究旨在通过调查全尺寸地热路面系统中地面的热响应，更好地了解这些系统的可行性和潜力，这在澳大利亚尚属首次。为此，在澳大利亚阿德莱德市建造了 20 m × 10 m 的全仪器化地热路面段。地热路面进行了热响应测试 (TRT)，此处采用了数值模型，并使用 TRT 数据进行了验证，以进一步了解地面响应。除了对地热路面的能源供应能力提供见解外，这项工作还介绍和讨论了地热路面 TRT 数据分析的各种方法，特别是获得有效地热导率，这是浅层地热设计的一个关键参数。结果表明，从考虑的方法来看，传统的半对数方法会导致热导率的高估，防护热板模型往往低估其值，详细的数值建模最准确，但计算成本更高。结果还表明，地热路面影响半径接近 0.5 m，即使地热路面受环境温度影响较大，²和 25 W/m 在此处分析的情况下每管长度的费率。