节段预制拼装法建造桥梁技术综述

节段预制拼装法造桥是分段建造桥梁的一种,在原理上是从预应力结构、箱梁设计和分段施工法综合而成,经济技术性强,适用范围广。结合课题研究成果和工程实例,从包括技术特点、优缺点、分类等节段预制拼装造桥基本理论入手,对包括节段预制基本方法、通用制梁技术、节段梁吊装和运输技术等的节段预制技术,包括逐跨拼装法节段拼装装备、平衡悬臂法节段拼装装备等的节段拼装装备,包括节段拼装方法、通用拼装技术等的节段拼装技术,最后特别强调节段预制拼装线形控制技术,并对采用该技术进行桥梁设计提出建议。

The Summary of Technologies for Building Bridges with Assembled Precast Segments

Bridge built with assembled precast segments is one kind of segmented bridge. In principle,it is built in combination of prestressed structures,box girder design and segmented construction method,which is superior in technology and economy with wide application. In view of the research results and project practices including technical features,advantages and disadvantages,and classification related to precast segment assembling, this paper summarizes precast segmental technologies for segment fabrication,lifting, transport and assembly, the equipment for span-by-span assembling and the equipment with balanced cantilever, the segment assembling method and the general assembly techniques. At the same time,the paper addresses the alignment control technology and provides suggestions on the design of bridges employing such technologies.