隧道环境下混凝土内部湿度分布

Distribution of relative humidity for tunnel lining condition concrete

摸拟隧道环境,测试分析了混凝土内部的湿度分布规律。试验结果表明,隧道混凝土结构中,近水端混凝土始终处于饱水状态,迎风面则处于相对干燥状态;迎风面混凝土的风干程度和深度与混凝土的厚度及强度有关,混凝土厚度越大,风干的程度及深度越大;混凝土强度越高,风干的程度及深度也越大。

Laboratory based tests were carried out to study distribution of relative humidity in simulated tunnel lining concrete.Results proved that in the tunnel concrete structure, concrete close to water front was constantly at a water saturated degree.In comparison, that close to the inner space and has good ventilation was in a relatively dry state.For the concrete at the inner surface.its drying extent and depth were relevant to concrete thickness and mechanical strength.Concrete of higher thickness or higher mechanical strength, its drying extent and depth were relatively more obvious.