双层地基中高导热能量桩热力学特性研究  

Study on thermodynamic characteristics of high thermal conductivity energy pile in double-layer foundation

作　　者：常虹[1] 吴琦琦 CHANG Hong;WU Qi-qi(School of surveying and prospecting engineering,Jilin Jianzhu university,Changchun 130118,China)

机构地区：[1]吉林建筑大学测绘与勘查工程学院,长春130118

出　　处：《吉林建筑大学学报》2024年第3期52-56,共5页Journal of Jilin Jianzhu University

基　　金：吉林省科技发展计划项目(20230203045SF)。

摘　　要：通过室内模型试验,针对不同循环次数与桩顶荷载作用下高导热能量桩热力学特性进行研究。结果表明:桩身与土体温度随着循环次数增加存在累积行为,距离桩中轴线越远,土体温度越低,变化越小;桩身附加温度应力沿深度方向先减小后增大,最大附加温度应力位于-257 mm处,附加温度应力随着桩顶荷载和循环次数增加而增大;随着桩顶荷载增大,循环后桩顶沉降增大,桩顶沉降随着循环次数增加存在累积行为,在能量桩设计时予以充分考虑。Through the indoor model test,the thermodynamic characteristics of the high thermal conductivity energy pile under different cycle times and pile top load are studied.The results show that the temperature of the pile and the soil has a cumulative behavior with the increase of the number of cycles.The farther away from the central axis of the pile,the lower the temperature of the soil and the smaller the change.The additional temperature stress of the pile body decreases first and then increases along the depth direction.The maximum additional temperature stress is located at-257 mm,and the additional temperature stress increases with the increase of pile top load and cycle times.With the increase of the pile top load,the pile top displacement increases after the cycle,which has a cumulative behavior with the increase of the number of cycles,and fully considered in the energy pile design.

关 键 词：高导热能量桩 模型试验 热力学特性 附加温度应力 桩顶位移 

分 类 号：TU473.1[建筑科学—结构工程]