能源地下连续墙温度应力的离心模型试验研究  

Centrifugal Model Test Study on Thermal Stress of Energy Diaphragm Wall

作　　者：李淑勇 夏才初 朱建龙[2,3] 程晓辉[4] Li Shuyong;Xia Caichu;Zhu Jianlong;Cheng Xiaohui(College of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000,P.R.China;College of Civil Engineering,Tongji University,Shanghai 200092,P.R.China;East China Electric Power Design Institute Co.,Ltd.,China Power Engineering Consulting Group,Shanghai 200063,P.R.China;Department of Civil Engineering,Tsinghua University,Beijing 100084,P.R.China)

机构地区：[1]绍兴文理学院土木工程学院,浙江绍兴312000 [2]同济大学土木工程学院,上海200092 [3]中国电力工程顾问集团华东电力设计院有限公司,上海200063 [4]清华大学土木工程系,北京100084

出　　处：《地下空间与工程学报》2020年第4期1012-1020,共9页Chinese Journal of Underground Space and Engineering

基　　金：国家高技术研究发展计划(863)项目(2012AA052501);国家自然科学基金(50878150);清华大学—剑桥大学—麻省理工学院低碳能源大学联盟种子基金(300907001)。

摘　　要：为研究能源地下连续墙在换热过程中温度应力的变化及其对结构物的影响,通过离心机模型模拟地下连续墙在砂土地基中的换热过程。在50g的离心加速场内模拟地下连续墙对砂土地基的传热升温,并对砂土地基中的温度场及地下连续墙体应变进行了监测,计算得到墙体所受温度应力。试验结果表明:能源地下连续墙的砂土地基温度场分布与空间有关,温度的差异是能源地下连续墙上温度应力产生的主要原因。随着埋深的增加,模型受到的约束作用越强,其温度应力也越大,即实际中埋深越深的地下连续墙受到的温度应力越大。在温差相近的条件下,地下连续墙开挖侧的温度应力沿埋深方向上的增幅明显大于未开挖侧。In order to study the change of thermal stress and its influence on structure of energy diaphragm wall during heat transfer,the heat transfer process of diaphragm wall in sand foundation was simulated by centrifuge model.Simulating the heat transfer of diaphragm wall to sand foundation in the centrifugal acceleration field of 50 g,and the thermal stress of the diaphragm wall was calculated and monitored.The test results show that the temperature field of sand foundation of energy diaphragm wall is related to space,and the difference of temperature plays a leading role in the generation of thermal stress on energy diaphragm wall.With the buried depth increase,the model is subjected to more restraint,the greater its temperature stress is.That is,the deeper the buried underground connection is,the greater thermal stress on the diaphragm wall is.Under the condition of similar temperature difference,the increment of thermal stress along the buried depth of diaphragm wall excavation side is obviously greater than that of the unexploited side.

关 键 词：地源热泵 能源地下连续墙 离心机模型试验 温度应力 温度 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]