高墩大跨度刚构桥上部结构施工关键技术应用

Application of Key Construction Technologies for Superstructure of High-Pier and Large-Span Rigid Frame Bridges

我国西部受地形地貌影响,多采取高墩大跨度刚构桥建设方法,却由于向薄壁、大跨、高墩方向发展,结构刚度下降、柔度增大,上部结构需采取悬臂施工法,提高工程质量。为此,本文以高墩大跨度刚构桥特点为切入点,结合某桥梁工程案例,分析其地形地貌、水文地质、工程特点,以此为基础,提出上部结构施工关键技术应用措施,从而为相关工作者提供参考。

Due to the influence of topography and landform,the construction method of high-pier and large-span rigid frame bridge is mostly adopted in western China.However,due to the thin-walled,large-span and high-pier development directions,the structural stiffness decreases and the flexibility increases,and the cantilever construction method is needed for the superstructure to improve the engineering quality.Therefore,this paper takes the characteristics of high-pier large-span rigid frame bridge as the starting point,combines with a bridge engineering case,analyzes its topography and landform,hydrogeology and engineering characteristics,and accordingly proposes the application measures of key technologies for superstructure construction,so as to provide reference for relevant workers.