环境温度作用下隧道结构变形分析

为了探讨隧道结构的变形缝合理设置问题,对某隧道的钢筋混凝土超长结构进行了使用阶段环境温度影响下结构变形现场量测,应用一维非稳态热传导理论和温度应力理论对环境温度影响下隧道结构的温度和变形进行计算.计算表明,对于超长混凝土隧道结构,使用期内环境温度的变化对于结构的温度变形影响不能忽视,变形缝的设置需要考虑永久变形缝的容许变形和混凝土施工时间的影响.

Analysis of tunnel structural deformation under effect of environmental temperature

To discuss the problem of the tunnel deformation joint setting, the tunnel super-length reinforced concrete structure was measured at on the spot under the effect of environmental temperature, and one dimension unsteady heat exchange theory and temperature stress theory to calculate the tunnel structure temperature and deformation under the effect of environmental temperature. The analysis indicates that for the tunnel super-length structure, the effect of environmental temperature on the structural temperature deformation can not be ignored, and that the setting of deformation joint should talce into account the admitted deformation of the eternal deformation joint and effect of the date of reinforced concrete completion.