摘要
能源桩是在桩基中埋设地源热泵换热器的新型桩基础。但目前对能源桩因桩-土热交换引起的桩身承载性状变化的研究和测试却极为有限。结合常规桩基静荷载试验和岩土热响应试验,建立了荷载-温度作用下能源桩的联合测试技术方法,提出以能源桩荷载水平和桩-土热交换工况等因素作用来确定荷载-温度联合测试方案,建议了相应的测试项目和内容、测试设备的选择及测试要点。结合某能源桩工程实例,介绍能源桩荷载-温度现场测试方案、内容及热交换设备;结合土层分布特征,介绍了桩身温度、应力传感器的布置的设计,并给出与桩身温度相关的桩顶沉降、桩身应力等数据。
Energy pile is a new artifical foundation technology with which pipe loops are incorporated in the pile foundation for ground-source heat-pump systems,but there have been little information regarding the researching and testing of bearing behavior of energy piles under the pile-soil heat exchange. Combined with the conventional static load test and the ground thermal response test,established the methods and requirements for the testing technique of energy piles under the mechanical thermo coupling effect were established,the testing scheme was determined by load level of energy piles and the operating of pile-soil heat exchange. It was suggested the testing items,contents,equipment selection and the point of testing. Combined with an engineering example of energy piles,it was introduced the scheme,contents and heat exchange equipment of the field testing,combined with the characteristics of soil in layers,the layout of the temperature and stress sensors on energy piles were also introduced. According to the testing process,the pile top settlement and the axial stresses of energy piles with the change of the temperature of pile shaft were presented.
出处
《工业建筑》
CSCD
北大核心
2016年第6期111-118,共8页
Industrial Construction
基金
江苏省六大人才高峰项目(2012-JZ-009)
江苏省建筑节能示范科技项目(2013SF01)
关键词
能源桩
桩基载荷试验
荷载-温度作用
荷载水平
桩-土热交换
energy pile
static loading test of pile foundation
mechanical-thermo effect
load level
pile-soil heat exchange
