合徐高速公路涂山淮河大桥主桥为 4 5 m+90 m +1 30 m +90 m +45 m =4 0 0 m的五跨一联预应力混凝土变截面连续箱梁桥 ,主跨跨径为 1 30 m。本桥上部结构受力复杂 ,施工控制较为困难。本文着重介绍主桥上部结构的设计特点和施工技术要点 The main bridge of Tu-Shan Huaihe Bridge on He-Xu Expressway is a five-span continuous prestressed concrete continuous-section box girder bridge of 4 5 m + 90 m +1 30 m +90 m +45 m = 400 m with main span The diameter is 130 m. The structure of the upper part of the bridge is complicated and construction control is more difficult. This article focuses on the design features and construction techniques of the main structure of the main bridge