碳纤维发热线用于道路除冰雪的技术研究

发布时间：2018-05-13 20:14

本文选题：道路除冰雪 + 碳纤维发热线　；参考：《长安大学》2014年硕士论文

【摘要】：随着我国现代化建设的快速发展，高速公路、立交桥、城市高架桥等得到了大量兴建，人们对于道路交通的通行保障要求也越来越高。但在我国北方地区，冬季气温低，冰雪天气相对较多，路面积雪、结冰现象普遍，严重影响了车辆的正常运行，给国民经济和人民生活造成较大影响。目前我国北方大部分省份采用道路融雪剂进行除冰雪，虽然这种方式除雪成本低廉且直接有效，但随着时间的发展普遍认识到，融雪剂等材料会造成路面剥蚀破坏、钢筋腐蚀、排水管道腐蚀和土壤生态环境破坏，并有反结冰现象。针对化学除冰雪带来的一系列环境问题，电热除冰雪技术因具有快捷、环保的特点而在道路工程中得到日益重视。本文采用碳纤维发热线通电后作为热源，用于水泥混凝土路面除冰雪。通过室内升温试验研究了发热线的埋深、间距、输入电流、环境温度以及上覆层材料等对混凝土试件升温效果的影响，确定了碳纤维发热线布设参数；基于热分析理论建立了Ansys热分析模型，通过对室内试验实测值进行有限元计算，确定了混凝土的热性能参数；对不同环境条件下的混凝土路面融雪时间进行了有限元计算，结果表明采用该技术可以满足一定条件下的路面除冰雪要求。通过利用有限元对混凝土板融雪过程中的温度应力进行计算，确定了混凝土板在持续加热过程中，同时满足荷载和温度应力的综合作用下路面板不产生极限断裂，以及6小时内除雪要求的条件下，不同环境中碳纤维发热线的合理输入电流。基于室内升温试验分析结果，最终选择发热线的埋深为3cm，布设间距为10cm，混凝土板的铺装功率为487.5W/m2，混凝土材料为普通混凝土，用于试验路的铺筑。通过铺筑试验路对施工工艺以及经济性进行了研究，并对升温效果进行了验证。
[Abstract]:With the rapid development of modernization in China, highway, overpass and urban viaduct have been built in large quantities. But in the north of our country, the winter temperature is low, the snow and ice weather is relatively more, the road surface snow cover, the icing phenomenon is common, has seriously affected the vehicle normal operation, has caused the big influence to the national economy and the people's life. At present, most provinces in the north of China use road snow melting agent to remove snow and snow. Although this method is cheap and direct and effective, with the development of time, it is generally recognized that materials such as snow melting agents will cause pavement erosion and corrosion of steel bars. Drainage pipe corrosion and soil ecological environment damage, and anti-icing phenomenon. In view of a series of environmental problems caused by chemical snow and ice removal, electrothermal snow and ice removal technology has been paid more and more attention in road engineering because of its quick and environmental characteristics. In this paper, carbon fiber hot wire is used as heat source to remove snow and ice on cement concrete pavement. The effects of the heat wire depth, spacing, input current, ambient temperature and coating material on the heating effect of concrete specimen were studied by indoor heating test, and the parameters of carbon fiber hot wire placement were determined. Based on the theory of thermal analysis, the Ansys thermal analysis model is established, the thermal performance parameters of concrete are determined by finite element calculation of the measured values of indoor tests, and the snowmelt time of concrete pavement under different environmental conditions is calculated by finite element method. The results show that the technology can meet the requirements of snow and ice removal under certain conditions. By using finite element method to calculate the temperature stress in the course of snow melting of concrete slabs, it is determined that in the process of continuous heating, there is no ultimate fracture in the concrete slab under the combined action of load and temperature stress. And the reasonable input current of carbon fiber emission hotline in different environments under the condition of snow removal within 6 hours. Based on the results of indoor heating test, the buried depth of hot wire is 3 cm, the spacing is 10 cm, the paving power of concrete slab is 487.5 W / m ~ 2, and the concrete material is ordinary concrete, which is used for paving test road. The construction technology and economy are studied by paving test road, and the effect of heating is verified.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.326

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