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冲断破坏是连续配筋混凝土路面的主要破坏形式,与混凝土开裂、路面裂缝形态和分布模式密切相关,环境温湿度是影响混凝土路面开裂的重要因素。通过对隧道内外温度、湿度等环境因素的观测分析,结合试验路研究温湿度对连续配筋混凝土路面开裂情况的影响,对比研究了连续配筋混凝土路面在隧道内外的应用情况,对路面铺筑完成后的裂缝发展进行了持续观测。研究发现,隧道内日温差为2℃,年温差为8.9℃,湿度达到75%～85%。施工时环境温度和养护时温湿度对连续配筋水泥混凝土路面裂缝的发生有较大影响,洞外的裂缝发生较多,早期出现部分密集分布的裂缝,洞内裂缝分布较合理。经过8个月包括一个冬天,相较隧道外裂缝数大幅增加的不同,隧道内裂缝间距更大,宽度更小。研究结果说明适当温湿度可保证水泥路面的应用,连续配筋混凝土路面产生的裂缝形态更加合理,表现在裂缝宽度小,间距大,降低了路面发生冲断和剥落的可能性。
Thrust failure is the main failure mode of continuous reinforced concrete pavement, which is closely related to concrete cracking, crack morphology and distribution pattern of the pavement. The environmental temperature and humidity are important factors that affect the cracking of concrete pavement. Through the observation and analysis of the environmental factors such as temperature and humidity inside and outside the tunnel and the influence of temperature and humidity on the cracking of continuously reinforced concrete pavement combined with the experimental road, the application of continuous reinforced concrete pavement in the tunnel is comparatively studied. After the completion of the crack development was observed continuously. The study found that the daily temperature difference in the tunnel is 2 ℃, the annual temperature difference is 8.9 ℃ and the humidity reaches 75% -85%. During construction, the ambient temperature and the temperature and humidity during curing have a significant impact on the occurrence of cracks on the continuous reinforced concrete pavement. There are many cracks outside the holes, some of the cracks are densely distributed in the early stage, and the distribution of cracks in the cave is reasonable. After 8 months, including a winter, the cracks in the tunnel are larger and smaller in width than the sharp increase in the number of cracks in the tunnel. The results show that proper temperature and humidity can ensure the application of cement pavement. The shape of cracks produced by continuous reinforced concrete pavement is more reasonable, which shows that the width of cracks is small and the spacing is large, which reduces the possibility of punching and peeling of pavement.