ABSTRACT
The sustainable development of society requires the development and utilization of energy to coordinate with the development of environment protection and ecological balance, minimize the damage to our environment in the process of utilizing energy, exploit renewable and clean energy, and to increase the efficiency of energy utilization (Yu Zhongyi 2008). Geothermal energy, one kind of renewable resources, has drawn researchers’ attention because of its sustainability and wide applicability across regions. In order to make better use of geothermal energy, many scholars have studied the characteristics of geotechnical heat transfer and obtained some achievements. Wang Wei (2010) performed a large number of tests for determining the properties of permafrost heat transfer. Wang Tie-hang (2010) summarized previous studies on water heat coupling in the field of loess, frozen soil, expansive soil, soil science, and so on. He further pointed out the limitations of research on the water heat coupling function. Sutton et al. (2005) worked out the drilling soil thermal resistance analytic expression when groundwater flows around. As a widely used ground source, the ground source heat pump also
basin II level terrace. The field has two layers of groundwater within the drilling depth. The first layer is surface water and perched water, assigned product in fish ponds, depression, and tillage soil, mainly from atmospheric precipitation and surface water, and the volume of water in this layer is relatively minor. The second layer is pore water, whose static level was buried deeply, 5.80-8.50 m, in the exploration period. Figure 1 shows the geological histogram of the field based on the geological survey report. The result of the thermal physical property test and the physical and mechanical properties test of the geotechnical layer sampling of the field are shown in Table 1.
