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一、概述洛溪大桥跨越珠江水网和稻田地区。大桥全长1916m,其中引桥长1436m,分别位于半径 R=1000m 和600m 的平曲线上,桥面全宽15.5m,纵坡4%,引桥最大高度33m。引桥上部为30m 跨径的预应力混凝土 T 梁共36孔,252片梁,每片梁重67t,梁高2m,架梁作业十分艰巨。原计划采用跨墩门架安装大梁的方案,在施工组织设计阶段,经过调查研究发现该方案有如下弊病:①沿桥跨越6条农用小
First, an overview Luoxi Bridge across the Pearl River water and rice fields. The total length of the bridge is 1916m, of which the approach bridge is 1436m long, lying on a flat curve with a radius of R = 1000m and 600m respectively. The bridge has a full width of 15.5m, a longitudinal gradient of 4% and a maximum height of the approach bridge of 33m. The upper part of the approach bridge has 36 holes and 252 beams of prestressed concrete T beams with a span of 30m. Each beam weighs 67 tons and the beam height is 2 meters. The original plan to install girders across the pier gantry program at the construction design phase, after investigation found that the program has the following drawbacks: ① across the bridge spanning 6 small agricultural