防灾减灾工程学报2017，Vol.37Issue(4)：511-517,7.DOI:10.13409/j.cnki.jdpme.2017.04.001
夏季制冷循环下PCC能量桩负摩阻力特性研究
Negative Skin Friction Behavior of PCC Energy Pile under Heating Cycle
摘要
Abstract
Based on traditional PCC pile,one of new type energy pile was developed.This new PCC energy pile has many advantages,such as,conveniently buried and high thermal conduction efficiency.However,the researches on negative skin friction of this new type energy pile influenced by temperature are relatively little.Based on model test method,the properties of PCC energy pile was carried out.Load-displacement curves under different temperatures and the temperature variation of pile and soil were measured,and the friction of pile shaft was also calculated.The bearing capacity and negative skin friction of PCC energy pile influenced by pile temperatures were discussed and analyzed.The results show that the bearing capacity of PCC energy pile is improved with the increment of pile temperature,which is similar with traditional solid energy pile.At the end of cooling,the direction of mobilized shaft resistance near top part of pile conversed and negative skin friction appeared.关键词
能量桩/PCC桩/负摩阻力/热力耦合/模型试验Key words
energy pile/PCC pile/negative skin friction/coupled thermal-mechanical/model test分类
建筑与水利引用本文复制引用
黄旭,孔纲强,刘汉龙,彭怀风,郝耀虎..夏季制冷循环下PCC能量桩负摩阻力特性研究[J].防灾减灾工程学报,2017,37(4):511-517,7.基金项目
国家自然科学基金项目(51378178)、江苏省普通高校研究生科研创新计划项目(KYZZ15_0145)资助 （51378178）
