隧道顶板改造中的超长大面积预应力叠合层设计  

Design of Over - length and Over - area Prestressed Superposition Structure of Tunnel Roof

作　　者：陈申一 郭正兴[1] 

机构地区：[1]东南大学土木工程学院,南京210096

出　　处：《特种结构》2005年第2期1-3,共3页Special Structures

摘　　要：针对南京火车站站前广场隧道的改造进行了研究,计算分析了在混凝土叠合层结构中取消温度伸缩缝的可行性,用超长预应力筋来控制裂缝的产生,解决原顶板中构造缺陷所造成的刚度差。The rebuild of tunnel in front of Nanjing Railway Station is investigated. The paper analyses the problem from the follow two aspects : no expansion joints are made in the ultra-long large area concrete superposition structure , use ultra-long prestress reinforcement to control the cracking ; resolve the stiffness difference in the primary roof because of the constructional limitation.

关 键 词：超长大面积 改造 顶板 隧道 叠合层 设计 南京火车站 温度伸缩缝 计算分析 控制裂缝 预应力筋 层结构 混凝土 广场 刚度 

分 类 号：U452.2[建筑科学—桥梁与隧道工程]