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一、前言洛溪大桥位于广州市南郊,是广州至番禺横跨珠江主航道的一座特大公路桥梁。该桥设计荷载为汽车—20级,挂车—100级,人群荷载为3.50kN/m~2;桥面宽15.5m,主桥上部构造为预应力混凝土4跨(65m+125m+180m+110m)连续刚构(如图6所示)。该桥的特点是桥高、跨大、悬臂长。在结构设计上采用大吨位张拉的预应力体系;在施工上采用挂篮悬臂分段浇注的施工方法。对于这种设计新
I. Introduction Luoxi Bridge is located in the southern suburbs of Guangzhou City, Guangzhou to Panyu across the Pearl River main channel of a major highway bridge. The design load of the bridge is -20 for cars and -100 for trailers, and the crowd load is 3.50 kN / m ~ 2; the bridge deck is 15.5 m wide, and the upper part of the main bridge is constructed with 4 spans of prestressed concrete (65m + 125m + 180m + 110m) Continuous rigid frame (shown in Figure 6). The bridge is characterized by high bridge, large cross, cantilever length. Structural design using large-tonnage tension prestressed system; in the construction of the hanging basket cantilever segmented pouring construction method. New for this design