防灾减灾工程学报2017，Vol.37Issue(4)：540-545,6.DOI:10.13409/j.cnki.jdpme.2017.04.005
温度对地热能源桩承载性状的影响
Influence of Thermal Loading on Bearing Capacity of Geothermal Energy Piles
摘要
Abstract
As a kind of GSHP (Ground Source Heat Pump),geothermal energy piles is the economic,stable,efficient,and environmentally friendly way of cooling and heating building.Based on four published field and centrifugal model test studies,the bearing capacity and mobilized stress of pile shaft and lateral friction resistance under the thermal loading are analyzed.At the same time,a model test in sand is done.Its results indicate that the lateral friction decreased with the increasing temperature,which is opposite to the former one.At last,the interaction mechanism between geothermal energy pile and soil is analyzed.When the geothermal energy piles are heated,the bearing capacity will be increased,and the friction resistance of the upper pile will be decreased.In contrast,the friction resistance of the low pile is increased.At the same time,the axial in pile will be enlarged.Whilst the geothermal energy piles are cooled,the friction resistance of the upper pile will be increased,and that of the low pile is decreased.There is even tensile stress in pile under the special case.关键词
温度荷载/地热能源桩/承载性状Key words
thermal loading/geothermal energy piles/bearing capacity分类
建筑与水利引用本文复制引用
方鹏飞,Bouazza Abdelmalek,Bill Wang,王忠瑾,谢新宇..温度对地热能源桩承载性状的影响[J].防灾减灾工程学报,2017,37(4):540-545,6.基金项目
浙江省自然科学基金项目(LY16E080010)资助 （LY16E080010）
