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Research on Geothermal Snow Melting using Foundation Piles applied to Bridges

地热融雪桥梁基桩应用研究

基本信息

批准号：
14550176
负责人：
TAKEUCHI Masanori
金额：
$ 1.73万
依托单位：
University of Fukui
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550176/
关键词：
Geothermal Snow Melting Solar Heat Storage Prediction by Numerical Simulation Snow Melting & Anti-freeze of Bridge Foundation Pile Steel Pile 橋粱融雪・凍結防止

项目摘要

Simulation software was developed for simulating geothermal snow melting system using foundation piles. The snow-melting model is based on thermal energy balance among snow-melting pavement road surface, piles, soil, dissipation pipes and etc. The software can simulate situations of melting snow and remaining snow on road surface, storage of thermal energy into soil, and etc. It is also applicable to the system with multiple piles, where the many piles are arranged in lattice configuration such as foundation piles of bridges. For simulating snow melting on road surface, temperature distribution inside snow layer is also considered so that the software can apply to snow melting situations for frigid regions such as Tohoku and Hokkaido district.Input data for the software are as follows : dimensions and arrangement of heat collecting and heat storage piles, constitution of soil, dimensions and structure of pavement road surface, dimensions and arrangement of dissipation pipes, kinds and … More flow rate of heat medium, meteorological data such as rainfall including snowfall, air temperature, wind velocity, humidity, solar radiation, sky radiation and etc. Output data from the software are as follows : situations of melting snow and remaining snow on pavement road surface, mean temperature of heat medium inside piles, mean temperature of pavement road surface, transferred heat, operation time of circulation pump, and etc.Field tests of this snow-melting system have been conducted at Nakamaizuru pedestrian bridge, road surface inside Research Center in Fukui city and test road surface in Sapporo. The simulation results are in good agreements with these field tests results, that show validity of the simulation software developed in this research.In addition, the simulation demonstrated possibility of thermal storage during seasons using multiple piles with appropriate pitch, where stored heat inside soil in summer does not dissipate so much that the heat can be applied to snow-melting operation in winter. This thermal storage during seasons was experimentally confirmed and utilized to design of Shin-Kiyonaga bridge under construction. Less

开发了模拟软件，用于模拟使用基桩的地热融雪系统。融雪模型基于融雪路面路面、桩、土壤、消散管道等之间的热能平衡。该软件可以模拟路面积雪的融化和残雪、土壤热能储存等情况。它也适用于多桩系统，即多桩呈格子状布置，如桥梁基桩。在模拟路面融雪时，还考虑了雪层内部的温度分布，使该软件能够适用于东北、北海道等寒冷地区的融雪情况。软件的输入数据如下：集热、蓄热桩的尺寸和布置、土壤的构成、路面的尺寸和结构、散热管道的尺寸和布置、热量的种类和流量。软件输出的数据有：路面融雪和残雪情况、桩内热介质平均温度、路面平均温度、传递热量、循环泵运行时间等。该融雪系统已在中舞鹤进行了现场测试人行天桥、福井市研究中心内路面、札幌试验路面。模拟结果与现场试验结果吻合较好，证明了本研究开发的模拟软件的有效性。此外，模拟还证明了使用适当节距的多根桩进行季节蓄热的可能性，夏季土壤内储存的热量不会散失太多，可以用于冬季的融雪作业。这种季节热储存经过实验证实，并用于正在建设的新清永桥的设计。较少的