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计算分析了温差对连续配筋混凝土路面配筋设计和开裂情况的影响,对路面早期温度和裂缝情况进行观测,得到了隧道内及路面温度变化情况和早期裂缝的发展规律。研究表明:隧道内温度变化缓慢,温差小。混凝土铺筑后的前4d,路面内部温度明显高于环境温度;79%的早期开裂出现在这一阶段;水泥水化使面板温度上升,在混凝土强度增长及干缩过程中应变增大、出现裂缝。前2d出现的裂缝数占前7d裂缝总数的50%,仅第2d出现的裂缝数就占裂缝总数的37.59%。裂缝宽度主要集中在0.1mm和0.2mm,占总裂缝数的60.5%;裂缝间距主要集中在2m~8m,占总裂缝数的76.8%。
The influence of temperature difference on reinforcement design and cracking of continuous reinforced concrete pavement was calculated and analyzed. The temperature and cracks in early pavement were observed. The variation of temperature inside the pavement and the development of early cracks were obtained. Research shows that: the tunnel temperature changes slowly, the temperature difference is small. In the first 4 days after concrete paving, the internal temperature of the pavement was significantly higher than the ambient temperature; 79% of the early cracking occurred at this stage; and the hydration of the cement caused the panel temperature to rise. As the concrete strength increased and the shrinkage increased, strain increased crack. The number of cracks occurred in the first 2 days accounted for 50% of the total number of cracks in the first 7 days, and the number of cracks appeared only in the 2 days accounted for 37.59% of the total number of cracks. The width of cracks is mainly concentrated in 0.1mm and 0.2mm, accounting for 60.5% of the total number of cracks. The cracks are mainly concentrated in 2m ~ 8m, accounting for 76.8% of the total number of cracks.