地下连续墙内热交换管引起的温度应力研究

Research on Thermal Stress Induced by the Heat Exchanger Pipes Buried in the Diaphragm Wall

能源地铁车站技术是一种利用地球地温能的新型建筑节能技术,通常是将地源热泵热交换管系统埋设在车站的结构中,当热交换管引起周围结构的温度产生变化时,会引起地下结构中产生温度应力。因此,对温度应力进行研究是确保结构安全的一个重要项目。通过对地下连续墙中埋设热交换管的情况建立热力学模型,并采用数值模拟方法进行求解。对数值模拟的结果进行分析,能直观地得到地源热泵系统运营时温度场和温度应力的特点,而这些特点对指导设计和施工有着重要意义。

The energy subway station is a new kind of energy-saving building which makes use of geothermal en- ergy. The heat transfer pipe system is usually buried in the structure of the station, and when the temperature around the pipes is changed, it will induce the thermal stress in the structure. Therefore,it is important to have a research on the thermal stress in the diaphragm wall to ensure the safety of the structure. To consider the thermal stress induced by the heat transfer pipes buried in the diaphragm, a thermo mechanical model is set up and computed by the numeri- cal way. From the numerical results, the characteristics of the temperature field and thermal stress of ground source heat pump can be easily obtained and analysed, which is significant for guiding the design and construction.