谈山区高速公路桥梁设计要点及方案比选

On design points and scheme comparison for bridge design for expressways in mountainous areas

山区高速公路桥梁设计应在保障功能和安全的前提下,选用合理的桥型方案、更优的桥梁结构形式、控制建设规模,减少工程造价。以宜来高速公路项目为例,对山区高速公路桥梁设计原则及要点进行论述。通过综合比选,提出更适合山区桥梁的主梁形式;对于高墩桥梁,提出合理的主墩类型及使上下部构造协调的高跨比;对于山区大跨径桥梁,提出更适合山区桥梁建设的桥型方案。

With the premise of ensuring the functions and safety for the bridge design of expressways,the paper selects the reasonable bridge schemes,optimizes the bridge structures,control the construction scales,and reduces the engineering cost,takes Yidu-Laifeng Expressway as the example to indicate the design principles and points for the bridge design of expressways,points out the main girders for the mountainous areas by the comprehensive selection,and points out the reasonable main pier and the depth-span ratio of the upper and lower structures,and puts forward the bridge type scheme for the bridge construction in the areas for the large-span bridges,so as to provide some reference for the similar design.