摘要
隧道路面可采用下层普通混凝土加上层多孔混凝土的双层结构组合方式,以保证其结构强度和路表使用功能。针对铺筑双层混凝土路面的关键问题,即如何控制多孔层加铺的时机,分别采用室内足尺试验和现场实体工程成型双层路面。通过钻芯取样测试了面层的抗压强度、抗剪强度、劈裂抗拉强度和抗弯拉强度,分析了多孔层加铺时机对路面强度的影响规律,得出路面强度随加铺时间间隔的增大而减小。从路面的整体效果来看,多孔混凝土层的合理加铺时机应控制在下层混凝土初凝过后,终凝之前。
To ensure the structural strength and the road surface function,the double-layer structure with sublayer ordinary concrete and upper layer porous concrete can be adopted in tunnel pavement.Aimed at the key issues of double-layer pavement,namely,how to control the timing of the porous layer paving,this study respectively applies the full scale test and field test forming double-layer pavement.Through core drilling sampling,surface compressive strength,shearing strength,tensile splitting strength and flexural strength are experimented,which shows the porous layer paving time on the strength of the pavement.It is observed that the pavement strength decreases with the increase of the time interval.The effect of the pavement shows that the reasonable time of paving porous concrete layer should be controlled between initial setting time and the final setting time.
出处
《华东交通大学学报》
2013年第1期41-45,共5页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(51178348)
关键词
多孔混凝土
加铺时机
隧道路面
强度
porous concrete
overlay time
tunnel pavement
strength
