大跨径刚构桥0号块施工技术分析

Construction Technology Analysis of Block 0 of Long-span Rigid Frame Bridge

刚构桥结构刚度较大,能克服复杂地形条件的限制,跨越能力强,已广泛运用到公路工程及市政工程中。该桥梁结构常采用对称挂篮悬臂法浇筑施工,0号块施工质量是影响该法施工质量的关键因素之一。以贵州凯里环城高速公路北段150m大跨径预应力混凝土连续刚构桥施工为例,对0号块施工技术进行介绍。

Rigid frame bridge is widely used in highway engineering and municipal engineering because of its high rigidity,ability to overcome the restrictions of complex terrain conditions and strong spanning ability.The symmetrical hanging basket cantilever method is often used in the construction of this bridge structure.The construction quality of Block 0 is one of the key factors affecting the construction quality of this method.Taking the construction of 150m long-span pre-stressed concrete continuous rigid frame bridge in the north section of Kaili Ring-City Expressway in Guizhou as an example,this paper introduces the construction technology of Block 0.