本文選題：道路除冰雪 + 碳纖維發(fā)熱線�。� 參考：《長安大學(xué)》2014年碩士論文

【摘要】：隨著我國現(xiàn)代化建設(shè)的快速發(fā)展，高速公路、立交橋、城市高架橋等得到了大量興建，人們對(duì)于道路交通的通行保障要求也越來越高。但在我國北方地區(qū)，冬季氣溫低，冰雪天氣相對(duì)較多，路面積雪、結(jié)冰現(xiàn)象普遍，嚴(yán)重影響了車輛的正常運(yùn)行，給國民經(jīng)濟(jì)和人民生活造成較大影響。目前我國北方大部分省份采用道路融雪劑進(jìn)行除冰雪，雖然這種方式除雪成本低廉且直接有效，但隨著時(shí)間的發(fā)展普遍認(rèn)識(shí)到，融雪劑等材料會(huì)造成路面剝蝕破壞、鋼筋腐蝕、排水管道腐蝕和土壤生態(tài)環(huán)境破壞，并有反結(jié)冰現(xiàn)象。 針對(duì)化學(xué)除冰雪帶來的一系列環(huán)境問題，電熱除冰雪技術(shù)因具有快捷、環(huán)保的特點(diǎn)而在道路工程中得到日益重視。本文采用碳纖維發(fā)熱線通電后作為熱源，用于水泥混凝土路面除冰雪。通過室內(nèi)升溫試驗(yàn)研究了發(fā)熱線的埋深、間距、輸入電流、環(huán)境溫度以及上覆層材料等對(duì)混凝土試件升溫效果的影響，確定了碳纖維發(fā)熱線布設(shè)參數(shù)；基于熱分析理論建立了Ansys熱分析模型，通過對(duì)室內(nèi)試驗(yàn)實(shí)測值進(jìn)行有限元計(jì)算，確定了混凝土的熱性能參數(shù)；對(duì)不同環(huán)境條件下的混凝土路面融雪時(shí)間進(jìn)行了有限元計(jì)算，結(jié)果表明采用該技術(shù)可以滿足一定條件下的路面除冰雪要求。 通過利用有限元對(duì)混凝土板融雪過程中的溫度應(yīng)力進(jìn)行計(jì)算，確定了混凝土板在持續(xù)加熱過程中，同時(shí)滿足荷載和溫度應(yīng)力的綜合作用下路面板不產(chǎn)生極限斷裂，以及6小時(shí)內(nèi)除雪要求的條件下，不同環(huán)境中碳纖維發(fā)熱線的合理輸入電流。 基于室內(nèi)升溫試驗(yàn)分析結(jié)果，最終選擇發(fā)熱線的埋深為3cm，布設(shè)間距為10cm，混凝土板的鋪裝功率為487.5W/m2，混凝土材料為普通混凝土，用于試驗(yàn)路的鋪筑。通過鋪筑試驗(yàn)路對(duì)施工工藝以及經(jīng)濟(jì)性進(jìn)行了研究，并對(duì)升溫效果進(jìn)行了驗(yàn)證。
[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.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U418.326

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