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A platform for research: civil engineering, architecture and urbanism
Large-span PC box girder bridge reinforcing structure and reinforcing method
The invention provides a large-span PC box girder bridge reinforcing structure which comprises a web plate and bottom plate reinforcing structure and a top plate reinforcing structure, the web plate and bottom plate reinforcing structure comprises a steel plate, a first low-shrinkage UHPC layer and a second low-shrinkage UHPC layer, the steel plate and the surface of an original concrete box girder are arranged in a spaced mode, and the space between the surface of the original concrete box girder and the steel plate is filled with the first low-shrinkage UHPC layer; the original concrete box girder is connected with the first low-shrinkage UHPC layer by implanting a first rigid connecting piece, and the first low-shrinkage UHPC layer is connected with the steel plate through a second rigid connecting piece; the top plate reinforcing structure comprises a third rigid connecting piece implanted into the surface of the original top plate, a reinforcing mesh laid on the surface of the original top plate and a second low-shrinkage UHPC layer poured on the surface of the reinforcing mesh. According to the large-span PC box girder bridge reinforcing structure, effective bonding with an original bridge structure is achieved, the structural rigidity and the anti-bending and anti-shearing bearing capacity are remarkably improved after reinforcing, and the construction simplicity and the economic and environment-friendly performance are good. The invention further provides a large-span PC box girder bridge reinforcing method.
本发明提供一种大跨PC箱梁桥加固结构，包括腹板和底板加固结构和顶板加固结构，所述腹板和底板加固结构包括与原混凝土箱梁表面间隔设置的钢板、填充于原混凝土箱梁表面与钢板之间且现场浇筑的第一低收缩UHPC层，原混凝土箱梁与所述第一低收缩UHPC层通过植入第一刚性连接件进行连接，所述第一低收缩UHPC层与所述钢板通过第二刚性连接件连接；所述顶板加固结构包括植入原顶板表面的第三刚性连接件、铺设于原顶板表面的钢筋网、及浇筑于所述钢筋网表面的第二低收缩UHPC层。本发明提供的大跨PC箱梁桥加固结构，与原有桥梁结构实现有效粘结，加固后显著提高结构刚度及抗弯抗剪承载力，且施工简易性与经济环保性均较好。本发明还提供一种大跨PC箱梁桥加固方法。
Large-span PC box girder bridge reinforcing structure and reinforcing method
The invention provides a large-span PC box girder bridge reinforcing structure which comprises a web plate and bottom plate reinforcing structure and a top plate reinforcing structure, the web plate and bottom plate reinforcing structure comprises a steel plate, a first low-shrinkage UHPC layer and a second low-shrinkage UHPC layer, the steel plate and the surface of an original concrete box girder are arranged in a spaced mode, and the space between the surface of the original concrete box girder and the steel plate is filled with the first low-shrinkage UHPC layer; the original concrete box girder is connected with the first low-shrinkage UHPC layer by implanting a first rigid connecting piece, and the first low-shrinkage UHPC layer is connected with the steel plate through a second rigid connecting piece; the top plate reinforcing structure comprises a third rigid connecting piece implanted into the surface of the original top plate, a reinforcing mesh laid on the surface of the original top plate and a second low-shrinkage UHPC layer poured on the surface of the reinforcing mesh. According to the large-span PC box girder bridge reinforcing structure, effective bonding with an original bridge structure is achieved, the structural rigidity and the anti-bending and anti-shearing bearing capacity are remarkably improved after reinforcing, and the construction simplicity and the economic and environment-friendly performance are good. The invention further provides a large-span PC box girder bridge reinforcing method.
本发明提供一种大跨PC箱梁桥加固结构，包括腹板和底板加固结构和顶板加固结构，所述腹板和底板加固结构包括与原混凝土箱梁表面间隔设置的钢板、填充于原混凝土箱梁表面与钢板之间且现场浇筑的第一低收缩UHPC层，原混凝土箱梁与所述第一低收缩UHPC层通过植入第一刚性连接件进行连接，所述第一低收缩UHPC层与所述钢板通过第二刚性连接件连接；所述顶板加固结构包括植入原顶板表面的第三刚性连接件、铺设于原顶板表面的钢筋网、及浇筑于所述钢筋网表面的第二低收缩UHPC层。本发明提供的大跨PC箱梁桥加固结构，与原有桥梁结构实现有效粘结，加固后显著提高结构刚度及抗弯抗剪承载力，且施工简易性与经济环保性均较好。本发明还提供一种大跨PC箱梁桥加固方法。
Large-span PC box girder bridge reinforcing structure and reinforcing method
一种大跨PC箱梁桥加固结构及加固方法
ZHAO HUA (author) / TAN CHENGJUN (author) / SHAO XUDONG (author) / SUN TAO (author) / TU LEI (author) / ZHU ENXIANG (author) / ZHANG YANG (author) / YAN BANFU (author)
2022-03-18
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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