青海高等级公路电热融雪技术的试验研究

发布时间：2018-03-17 17:37

本文选题：电热融雪　切入点：发热电缆　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着青海地方经济大的快速发展,高等级公路的建设规模迅速增加,然而青海地处高寒高海拔地区。冬季寒冷期长,且最低气温偏低,冬季降雪天气给高等级公路的交通安全造成很大影响。大量的研究调查显示,冬季冰雪道路严重影响道路交通。冬季,因雨雪天气给道路畅通和行车安全带来了严重的影响,在冰、雪天气中,路面附着能力大大降低,对车辆行驶的动力性及安全性极为不利,交通事故频繁发生,因此本论文针对高等级公路的上下坡段、弯道处及隧道出入口等特殊路段的电热融雪技术进行试验研究。主要分析发热电缆融雪化冰的一些关键问题,进行了相应的调查研究及试验研究,对功率设计、施工技术、技术和经济优势进行分析。通过分析现场电热融雪数据及融雪效果,得出电热融雪试验初期有一很长的时段路面在吸热升温,而融雪量小,升温后融雪速度快,效果显著;压实雪的融雪效率比未压实雪的融雪效率高;在预热情况下,可实现实时融雪。结合青海省的高寒气候特点,得出对于青海地区道路融雪,其铺装功率采用650W/m2才可满足本地区融雪化冰要求。故将该功率作为我省高等级公路电热融雪的推荐功率。通过对加入发热电缆层的沥青混合料和普通沥青混合料的对比试验研究,得出加入发热电缆层对沥青混凝土路面起到了加筋作用,提高了其力学性能。通过对不同层位加入发热电缆层的沥青混合料的对比试验研究,得出了发热电缆层位于试件中间时,其抗压强度与抗压回弹模量最大,同时其抗车辙性能也得到提高,加筋效果最好。综合考虑融雪效果、发热电缆强度、发热电缆层对沥青混凝土面层的加筋效果、青海高等级公路常用沥青路面面层结构形式等主要制约因素,确定青海高等级公路电热融雪发热电缆层最佳埋置位置为4cm的上面层之下。通过施工工艺研究,验证了加设稀浆封层的新施工工艺的可行性。并对发热电缆的经济效益和社会效益进行了分析。
[Abstract]:With the rapid development of local economy in Qinghai, the construction scale of high grade highway is increasing rapidly. However, Qinghai is located in alpine and high altitude area. The winter cold period is long, and the minimum temperature is low. Winter snow weather has a great impact on the traffic safety of high grade highways. A large number of studies show that winter snow and ice roads seriously affect road traffic. In winter, due to rain and snow weather, the traffic safety is seriously affected by the rain and snow weather. In the weather of ice and snow, the adhesion ability of road surface is greatly reduced, which is extremely unfavorable to the driving power and safety of vehicles, and traffic accidents occur frequently. Therefore, this paper aims at the upper and lower slope section of high grade highway. The electric heat melting snow technology at the bend and the tunnel entrance and other special sections is tested and studied. Some key problems of snowmelt and ice melting of the heating cable are analyzed, and the corresponding investigation and experimental research are carried out, and the power design and construction technology are also studied. The technical and economic advantages are analyzed. By analyzing the field data and the effect of melting snow, it is concluded that there is a long period of time in the initial stage of the experiment of electric melting snow, but the amount of melting snow is small, the snowmelt speed is fast after heating up, and the effect is remarkable. The snowmelt efficiency of compacted snow is higher than that of uncompacted snow; under the condition of preheating, real-time snowmelt can be realized. The surfacing power is 650 W / m ~ 2 to meet the requirement of snow melting and ice melting in this area. Therefore, this power is regarded as the recommended power for electric snow melting of high grade highway in our province. The asphalt mixture and ordinary asphalt mixture with heating cable layer are added to the asphalt mixture. A comparative experimental study based on. It is concluded that adding heating cable layer can strengthen asphalt concrete pavement and improve its mechanical properties. When the heating cable layer is in the middle of the specimen, its compressive strength and compressive resilience modulus are the largest, and its rutting resistance is also improved, and the reinforcement effect is the best. Considering the snowmelt effect, the strength of the heating cable is obtained. The effect of heating cable layer on the reinforcement of asphalt concrete surface layer, the structural form of asphalt pavement surface of Qinghai high grade highway and other main restrictive factors, It is determined that the best buried top layer of electric heat melting snow heating cable layer of Qinghai high grade highway is 4 cm below the top layer. Through the study of construction technology, The feasibility of the new construction technology of the slurry seal layer is verified, and the economic and social benefits of the heating cable are analyzed.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U418.41

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