铁路预应力混凝土连续梁节段预制胶拼法建造技术研究  

Design and Construction of Railway Prestressed Concrete Continuous Segmental Bridges

作　　者：苏伟 周岳武 季伟强 邢雨 张悦 SU Wei;ZHOU Yuewu;JI Weiqiang;XING Yu;ZHANG Yue(China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308

出　　处：《铁道标准设计》2021年第3期87-92,共6页Railway Standard Design

基　　金：中国铁路总公司科技研究计划重大课题(2016G002-H);中国铁路设计集团有限公司科技开发重点课题(2019YY220607)。

摘　　要：为形成我国铁路预应力混凝土连续梁节段预制胶拼法建造技术,通过调研、理论计算、对比分析、试验论证等方法以及工程实际应用,对其技术指标、方案及构造设计、节段拼装方案、耐久性设计、经济性等进行研究,研究成果主要有:(1)系统提出铁路预应力混凝土连续梁节段预制胶拼梁主要技术指标要求;(2)为方便节段预制、存放及运输,节段预制拼装连续梁立面布置宜根据跨度选择等高方案或增加跨中等高段的变高方案;(3)提出连续梁一次半联满挂拼装工艺、“小节段预制、多节段拼装”的平衡悬臂拼装工艺和逐跨拼装工艺;小跨连续梁可采用一次半联满挂拼装工艺和逐跨拼装工艺,中、大跨连续梁可采用一次拼装多对预制节段,即“小节段预制、多节段拼装”的平衡悬臂拼装工艺;(4)当桥长超过1 km时,节段预制拼装方案具有较好的经济性能。In order to formulate the building technology of prestressed concrete continuous segment bridges of China's railway,the technical standard,structural design,segmental assembly schemes,durability design and economy are analyzed based on investigation,theoretical calculation,comparative analysis,experimental demonstration and practical engineering application.Research indicates:(1)The main technical standards for railway prestressed concrete continuous segmental bridges are proposed.(2)To make it easier for prefabrication,storage and transportation,bridge with the same height segments or bridge with additional midspan segment of the same height should be selected.(3)Semi-span fullhanging erection,span by span erection and balanced cantilever erection of“small segment precasted and multiple segments assembled”are proposed.The small-span continuous beam can adopt the semi-span full-hanging erection or span by span erection,and the medium-span or large-span continuous beam can be assembled in the balanced cantilever erection of“small segment precasted and multiple segments assembled”.(4)When the bridge length exceeds 1 km,the segmental bridge has better economic performance.

关 键 词：铁路桥 预应力混凝土 连续梁 节段拼装法 设计 施工 

分 类 号：U448.13[建筑科学—桥梁与隧道工程] U448.21+3[交通运输工程—道路与铁道工程]