超薄水泥混凝土路面荷载应力分析

【作者】 马骉；

【导师】 胡长顺；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2002， 硕士

【摘要】 超薄水泥混凝土(UTW)路面是指在已严重恶化的旧沥青路面铣刨后的表面铺筑一层50～100mm厚的高早强、纤维增强混凝土形成的路面结构。作为一种新型、有效、快速、经济且简便的旧沥青路面维修技术，虽自Lousiville试验路后在美国已进行了大量试验路研究，但在路面结构荷载应力分析方面尚属空白。本文采用三维有限元法分析了UTW路面荷载应力，确定了路面板的临界荷位，得出了板接缝间距、厚度、板与地基模量比(Ec／Es)和层间接触状况对应力的影响规律。利用弹性三层体系，分析了沥青层对应力的影响规律。通过大量计算，提出了UTW路面荷载应力实用计算方法。最后，介绍了我国第一条UTW路面试验路的修筑情况。更多还原

【Abstract】 Ultra-Thin Whitetopping Pavement is a recently developed,low-cost, effective, quickly and fairly simple rehabilitation technique in which a 50 to 100mm thick layer of high-early strength, fiber-reinforced concrete is placed over a milled surface of distressed asphalt concrete pavement. Since the Louisville UTW experiment, although, some UTW experimental projects have been built in United State, the loading stress of UTW pavement has not been analyzed by theoretical calculation.In this paper, A three dimensional finite element analysis has been used to analyse the loading stress of UTW pavement. The critical loading position of UTW plate and the rules of the effect of the joint spacing of plate, the thickness of overlay, Ec/Es and the interface conditions between concrete overlay and existing AC on the stress are provided. The effects of the existing asphalt layer on the stress of UTW have been analyzed in elastic three layer system. On the basis of a great deal of calculation, a simple and rational calculation method of the loading stress of UTW Pavement is brought forward. In the end, first UTW experimental project in China is introduced.更多还原