市政隧道箱涵结构设计

Structural Design of Municipal Tunnel Box Culvert

以Q市政隧道工程为例,进行了隧道箱涵结构设计问题的探讨,具体包括合理覆土厚度的确定,箱涵结构钢筋布置,通风口的布设,结构正截面和斜截面抗弯承载力验算,极限状态下箱涵结构状态的验算等方面。分析结果表明,隧道箱涵结构设计及处理在整个隧道工程设计中十分关键,箱涵结构处理既要充分考虑结构设计的便利性、经济性,又要考虑后续市政线缆管道的埋设情况,加强箱涵结构设计与后期建设运营管理之间的协调。

Taking Q municipal tunnel engineering as an example,the structural design of tunnel box culvert is discussed,including determination of reasonable overburden thickness,reinforcement arrangement of box culvert structure,layout of vent,checking calculation of bending bearing capacity of normal section and inclined section of structure,checking calculation of box culvert structural state under limit state,etc.The analysis results show that the design and treatment of the tunnel box culvert structure is very important in the whole tunnel engineering design.The box culvert structure treatment should not only fully consider the convenience and economy of the structural design,but also consider the burying situation of the subsequent municipal cables and pipes,and strengthen the coordination between the box culvert structure design and the later construction and operation management.