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随着高速公路建设的迅猛发展,尤其是高速公路进入山区建设以来,公路桥梁占部分路段长度的60%以上,因此,桥梁耐久性、建设成本以及施工工艺要求等综合因素,往往是制约工程建设进度与质量的重要环节。结合云南30m跨径的预应力混凝土T形连续梁桥近期较常采用的圆形截面双柱式桥墩和矩形截面Y形桥墩在不同地形环境、不同墩高情况下的应用,从工程、技术和经济等角度进行综合分析、比较,以期确定更加合理的桥梁布设方案,提高桥梁建设速度和桥梁建设质量,同时降低造价。
With the rapid development of expressway construction, especially since the expressway into the mountainous area, highway bridges account for over 60% of the length of the road sections. Therefore, the comprehensive factors such as the durability of the bridge, the construction cost and the requirements of the construction technology often constrain the construction of the project Progress and quality of an important part. Based on the application of the 30 m-span prestressed concrete T-shaped continuous girder bridge in Yunnan Province, which has been more commonly used in recent years, with circular cross-section double-column piers and rectangular section Y-shaped piers under different topographical conditions and different piers, Economy and other aspects of a comprehensive analysis and comparison in order to determine a more rational layout of the bridge to improve the speed of bridge construction and bridge construction quality, while reducing costs.