大跨度地道结构设计中几个问题的探讨

Discussion on Several Problems in Design of Long-span Underpass Structure

大跨径地道通道是目前地下道路建设中难以避免的问题。以实际工程为依托,对大跨径地道通道设计中的几个问题进行了总结。针对较为新颖的带肋箱形顶板设计,介绍了确定顶板肋距时需要注意的几个问题。针对大跨径地道底板设计,介绍了可以从提高基床系数、采用桩基础等方面减小地道底板的弯矩。

The long-span underpass is an unavoidable problem in the construction of underground roads now. Based on an actual project, this paper summarizes several problems in the design of long-span underpass. For the relatively new design of ribbed box top slab, this paper introduces several problems for attention in the determination of the rib distance of the top slab. For the design of the bottom slab of long-span underpass, this paper introduces some methods to reduce the bending moment of the underpass bottom slab from the aspects of increasing the base bed coefficient and using the pile foundation.