仁江河大跨连续刚构桥的设计及塌腰防治  

Design of Renjiang River Large-span Continuous Rigid-frame Bridge and Subsidence Across the Middle

作　　者：徐德标[1] 张海波[1] 

机构地区：[1]北京市市政工程设计研究总院,100082

出　　处：《特种结构》2013年第3期18-21,5,共5页Special Structures

摘　　要：仁江河大桥为全长364m的三孔预应力混凝土连续刚构桥,跨径组合为98m+168m+98m。本文根据连续刚构桥的特点,并参考国内外已建同类桥梁,介绍了此桥的设计构思及设计要点。其中,重点论述了该桥合理跨径的选择、总体计算过程中截面的优化。最后本文阐述了如何防治大跨连续刚构桥的跨中塌腰现象,并介绍了仁江河大桥所采取的防塌腰措施。希望本文对同类桥梁设计起到一定的借鉴作用。Rengjiang River Bridge is 364m in length of three-span prestressed concrete continuous rigid- frame bridge which long-span combined into 98m＋ 168m＋ 98m. According to the characteristics of continuous rigid frame bridge and reference of similar bridges both at home and abroad, the design concept and design essentials of bridge was described. The choice of a reasonable span of the bridge and in the overall calculation optimization of cross section were focused on. Finally how to control long-span continuous rigidframe bridge from subsidence across the middle and its prevention measures to prevent warpage were explained.

关 键 词：预应力砼连续刚构桥 设计构思 设计要点 跨中塌腰 防治 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]