深圳市东环快速路跨布吉河桥南北辅桥原为人行道和非机动车道桥,桥跨布置为3×20米钢筋混凝土简支 T 梁。随着城市交通的发展,拟将其改造为车行道桥,并满足汽-超20、挂-120的通行要求。设计采用加大截面法对主梁进行加固,在 T 梁腹板两侧加宽马蹄、并在新加宽的马蹄内布置纵向主筋,以抵抗大幅提高的使用荷载。 Shenzhen East Ring Expressway across the Buji River Bridge North and South Bridge was originally a sidewalk and non-motorized road bridge, the bridge span of 3 × 20 m reinforced concrete simply supported T beam. With the development of urban traffic, it is proposed to transform it into a carriageway bridge and meet the traffic requirements of steam-super 20 and hang-120. The design adopts the enlarged section method to reinforce the girder, widen the horseshoe on both sides of the T girder web, and arrange the longitudinal girders in the newly widened horseshoe to resist the greatly increased service load.