G15 公路嘉金段空心板梁拼宽设计

随着时代的发展，社会对桥梁结构的建设提出了越来越高的要求。为了缓解交通压力，提升经济发展，降低工程造价，减小社会影响，越来越多的现状桥梁会被拓宽改建，继续承担着社会责任。G15公路嘉金段改扩建工程存在大量的既有桥梁改建需求，其中空心板梁拼宽，采用上部结构连接，下部结构不连接的方式。对空心板梁三种拼宽方案进行比选，同时计算分析了新建结构的沉降对现状空心板梁以及拼缝的影响。为桥梁改扩建工程的设计提供了一定的参考。

Widening Design of Hollow Slab Beam in Jiajin Section of G15 Highway

With the development of the times, the entire society has put forward higher and higher requirements for the construction of bridge structures. In order to alleviate the traffic pressure, promote the economic development, reduce the engineering costs and reduce the social impact, more and more existing bridges will be widened and rebuilt continuously to bear the social responsibilities. In the reconstruction and expansion project of Jiajin Section in G15 Highway, there are a large number of existing bridges to be reconstructed, in which the hollow slab beams are widened by the method of connecting the superstructure and not connecting the substructure. Three widening schemes for its hollow slab beams are compared and selected, and the impact of the settlement of the newly built structure on the existing hollow slab beams and joints is calculated and analyzed, which provides a certain reference for the design of bridge reconstruction and extension projects.