内置碳纤维发热电缆的桥面融冰化雪技术研究

发布时间：2018-02-25 15:46

本文关键词： 道路工程融冰化雪碳纤维发热电缆室内试验有限元分析　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：低温环境下,路面或桥面容易结冰,影响车辆通行能力和交通安全。目前道路除冰雪的方法如撒盐、人工(或机械)除雪等都能在不同程度上解决该问题。但是这些方法往往都需要耗费大量的人力、物力和财力,且通常具有一定的滞后性。采用发热电缆加热法在能较好的解决这些问题。虽然目前国内在这方面已经开展了一些研究,但其在工程上的应用相对较少,因此有必要进行进一步的研究,使得发热电缆加热法应用于道路融冰雪的理论更加完善,从而推动其在道路融冰雪领域的应用。碳纤维发热电缆作为一种新型发热材料,具有低密度、耐高温、耐磨擦、耐腐蚀、热膨胀系数低,使用寿命长,同时安全、环保、节能等优点,综合考虑本文决定采用桥面内置碳纤维发热电缆的方法来解决依托工程在冬季可能遇到的结冰问题。针对采用碳纤维发热电缆在桥面融冰化雪过程中需要解决的问题,如:碳纤维发热电缆的选型、布设间距、埋设位置等问题,本文做出了如下研究:(1)介绍发热电缆的组成结构,分析融冰化雪用发热电缆相关技术指标,并基于施工、发热效率等因素的考虑,初步确定发热电缆的埋设位置、布设形式及发热系统的电路连接形式。(2)进行室内实验,成型内置碳纤维发热电缆的桥面板融冰化雪的试件,对系统融冰化雪的可行性、发热均匀性及相关影响因素进行试验测试,为实践应用提供有力支撑。(3)基于传热学基本理论,采用有限元法研究发热体融冰化雪系统温度场分布及温升规律,并分析了系统温度场与发热电缆埋设位置、布设间距、发热电缆温度、环境温度等的关系以及各影响因素对表面温度的影响程度大小。(4)以桥面铺装层为两层沥青面层和水泥混凝土为例,对在不同铺装功率与环境条件下的桥面表面能达到实时融冰化雪所需的时间进行了预测,可为碳纤维发热电缆用于道路融冰化雪时铺装功率、化雪时间等提供参考。
[Abstract]:At low temperatures, roads or bridge decks are prone to ice, affecting vehicle capacity and traffic safety. Current methods of removing ice and snow from roads, such as salt sprinkling, Manual (or mechanical) snow removal can solve the problem to varying degrees. But these methods often cost a lot of manpower, material and financial resources. The heating cable heating method can solve these problems better. Although some researches have been carried out in this field at present, its application in engineering is relatively few. Therefore, it is necessary to further study the application of heating cable to road ice and snow melting theory, so as to promote its application in road ice and snow melting field. Carbon fiber heating cable is a new type of heating material. It has the advantages of low density, high temperature resistance, friction resistance, corrosion resistance, low coefficient of thermal expansion, long service life, safety, environmental protection, energy saving and so on. In this paper, we decide to adopt the method of carbon fiber heating cable built in bridge deck to solve the problem of ice formation in winter, and to solve the problem of using carbon fiber heating cable in the course of ice melting and snow melting on bridge deck. For example, the selection of carbon fiber heating cable, the arrangement distance, the embedding position and so on, this paper makes the following research: 1) introduces the composition structure of the heating cable, analyzes the related technical index of the heating cable for melting ice snow, and based on the construction, Considering the factors such as heating efficiency, the location of the heating cable, the layout of the cable and the circuit connection form of the heating system are preliminarily determined. The indoor experiments are carried out to form the test piece of the ice-melted snow on the bridge deck of the carbon fiber heating cable, which is built into the carbon fiber heating cable. Based on the basic theory of heat transfer, the feasibility, heat uniformity and related influencing factors of the system melting ice snow are tested and tested, which provides a strong support for practical application. In this paper, the temperature field distribution and temperature rise rule of ice melting snow system of heating body are studied by finite element method, and the temperature field of system and the position, spacing and temperature of heating cable are analyzed. The relationship between environmental temperature and other factors and the influence of each factor on surface temperature. (4) taking the bridge deck pavement as a two-layer asphalt surface layer and cement concrete as an example, The time required for the bridge surface to melt snow in real time under different paving power and environment conditions is predicted, which can provide a reference for the pavement power and snow melting time of carbon fiber heating cable used in road ice melting and snow melting.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.7

【相似文献】