摘要
建立了地热桩荷栽-温度作用数值计算模型,并用现场试验数据进行模型的验证。结合不同气候地区地源热泵系统运营特征模拟了地热桩3种不同持续运营工况。给出了不同荷载水平下,升温、降温和升-降温持续周期性运营工况影响的单桩桩顶沉降变化曲线。结果表明:长期运营过程中桩顶沉降呈现周期性变化并产生累积;沉降累积效应与地热桩运营工况以及桩顶荷载水平有关;地热桩工程应用应关注持续周期性运营过程中温度的影响。
Geothermal energy pile combined pile tube, the bearing properties of geothermal energy foundation with ground source heat pump heat exchange were pile investigated.A numerical calculation model for geothermal energy pile was established and the available experimental data in literature were used to validate the model calculation. Combined with the operation characteristics of the ground source heat pump system in different climate subareas, heating, cooling and heating-cooling continuous cyclic cases of geothermal energy pile were simulated.The curves of the settlement of pile top at different load levels of three continuous operation conditions due to temperature variation were given.The results indicated that the settlement of pile top presented periodic change and could lead to increase at the same time during the long term operation process, the cumulative effect of settlement of geothermal energy pile was affected by the load level of geothermal energy pile and the operating case of the ground source heat pump system. The influence of temperature in the long term operation should be considered in application of geothermal energy pile.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2016年第1期89-95,共7页
Journal of Nanjing Tech University(Natural Science Edition)
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
地热桩
荷载-温度作用
持续周期性温度循环
桩顶累积沉降
geothermal energy pile
thermo-mechanical effect
continuous periodic temperature cycle
cumulative settlement of pile top
