航道桥结构型式的综合比选

Synthetic Comparison and Choice to Structure Type of Sea-route Bridge

通过对某航道桥公路桥和铁路桥上、下部结构型式的综合比选,最后确定上部结构采用四跨一联的连续梁结构型式,下部结构采用左右两幅分离式钻孔灌注桩基础。这样既满足了特殊荷载作用下上下部结构受力的要求,又保证了下部结构抗推刚度的要求,使得上下部结构得到了最大程度的优化,这也充分说明了大跨度桥梁结构型式综合比选的必要性。

After synthetically comparison and choice to the structure type of a sea-route bridge,the thesis confirms that the superstructures of the sea-route bridge are designed as continuous-girder bridge,and the infrastructures are de-signed as borehole cast-in-place concrete pile foundation footing.Thus the bridges can satisfy all requirements and push resist stiffness to the infrastructures under special loads.The superstructures and infrastructures are gained maximum optimization.It shows that the synthetic comparison and choice to structure type of long span bridge is necessary.