U型、W型和螺旋型埋管形式能量桩热力学特性对比模型试验

发布时间：2018-01-11 16:33

本文关键词：U型、W型和螺旋型埋管形式能量桩热力学特性对比模型试验　出处：《岩土力学》2016年S1期 　论文类型：期刊论文

【摘要】：能量桩是一种可以节省地下空间和施工埋管费用的新技术,目前针对其在供暖和制冷过程中土体和桩基之间的相互作用机制研究却相对较少。基于模型试验方法,系统地研究了饱和砂土中单U型(绑扎和预埋形式)、W型和螺旋型等4种不同埋管形式情况下的能量桩热力学效应、传热和承载特性,测得桩体和桩周土体温度、桩端阻力、水平土压力、桩顶位移以及桩体应变随时间的变化规律。试验结果表明,在相同输入功率情况下W型埋管形式桩体的温度、土体压力、应力和桩顶位移均较螺旋型和U型埋管形式的情况大。
[Abstract]:Energy pile is a new technology which can save underground space and construction cost. At present, there are few researches on the interaction mechanism between soil and pile foundation in the process of heating and refrigeration. Based on the model test method, the single U type (binding and pre-burying forms) in saturated sand is studied systematically. The thermodynamic effect, heat transfer and bearing capacity of the energy pile under four different types of buried pipe, such as W type and spiral type, are measured. The temperature of the pile and the soil around the pile, the resistance at the end of the pile, and the horizontal earth pressure are measured. The experimental results show that under the same input power, the temperature and the soil pressure of the W-type buried pipe pile form are changed with the change of the displacement of the pile top and the strain of the pile body with the same input power. The stress and displacement of pile top are larger than those of spiral and U type buried pipes.
【作者单位】：重庆大学土木工程学院;重庆大学山地城镇建设与新技术教育部重点试验室;河海大学土木与交通学院;
【基金】：国家自然科学基金(No.51378178) 重庆大学研究生科研创新项目基金(2015年) 教育部博士点联合基金(No.20130094140001) 山地城镇建设与新技术教育部重点实验室开放基金(No.0902071812401)~~
【分类号】：TU473.1
【正文快照】： This work was supported by the National Natural Science Foundation of China(51378178),Chongqing University Postgraduates'Innovation Project(2015),Doctoral Program of Higher Education(20130094140001)and Key Laboratory of New Technology for Construction of

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