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一、前言正在施工中的广东洛溪大桥是跨越珠江下游的一座四车道公路桥,主桥由交通部公路规划设计院与广东省公路勘察规划设计院共同设计,由广东省交通厅工程处施工。该桥总长1916.04米,主桥采用65+125+180+110米的四跨连续刚构,180米的主跨将是我国采用悬臂施工方法建造的跨径最大的预应力混凝土桥梁。本文主要介绍洛溪大桥主桥方案及其设计。二、方案介绍 (一)主要特点在桥型选择时,考虑了主跨180米的连续刚构、主跨150米的连续梁和主跨230米的双塔斜拉桥三个方案,从当前长大桥梁朝着以无支座无伸雏缝方向展发,以及从技术经济的比较,最后选定了65+125+180+110米的连续刚构方案。主桥全长480米,除两
I. Introduction The Luoxi Bridge under construction in Guangdong is a four-lane highway bridge that crosses the lower reaches of the Pearl River. The main bridge is jointly designed by the Highway Planning and Design Institute of the Ministry of Communications and Guangdong Provincial Highway Survey Planning and Design Institute and is constructed by the Engineering Department of Guangdong Communications Department . The total length of the bridge is 1916.04 meters. The main bridge adopts a four-span continuous rigid frame of 65 + 125 + 180 + 110 meters. The main span of 180 meters will be the largest span prestressed concrete bridge constructed by the cantilever construction method in China. This article mainly introduces the main bridge project of Luoxi Bridge and its design. II. Introduction of the Scheme (I) Main Characteristics In the selection of bridge type, three schemes of continuous rigid frame with main span of 180 meters, continuous beam with main span of 150 meters and double tower cable-stayed bridge with main span of 230 meters are considered. From the current Growing up the bridge towards the direction of the non-pocketed seams, and from the technical and economic comparison, the final selected 65 +125 +180 +110 meters of continuous rigid frame program. The main bridge is 480 meters in length, except two