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A platform for research: civil engineering, architecture and urbanism
Existing hollow slab girder bridge reinforcing structure and method for preventing support from disengaging
The invention discloses an existing hollow slab girder bridge reinforcing structure and method for preventing a support from disengaging. After the two ends of a bottom plate of an existing hollow slab are subjected to chiseling and bar planting treatment, an end cross beam section is poured below the bottom plate, concave shear keys and convex shear keys are vertically distributed on the joint face of the end cross beam section in a staggered mode, the joint face of the end cross beam section is coated with adhesive, and corrugated pipes are embedded in the joint face of the end cross beam section; a large-tonnage support is poured and installed after the connecting part of the top end of the existing pier and the existing bent cap is chiseled away; all existing hollow slabs in the same span are transversely spliced, the spliced end cross beam sections are meshed with one another through concave shear keys and convex shear keys on joint faces, the end cross beam sections are sequentially in butt joint to form end cross beams, and corrugated pipes are sequentially in butt joint to form transverse channels. The prestressed steel strands penetrate through the corresponding transverse channels and apply prestress to the two transverse ends of the end cross beams, and the end cross beams are supported on the two existing piers through the two large-tonnage supports respectively. According to the invention, the disengagement of the support is fundamentally avoided, and the service life of the existing hollow plate and the hinge joint is prolonged.
本发明公开了一种防止支座脱空的既有空心板梁桥加固结构及方法，既有空心板的底板两端凿毛植筋处理后下方浇筑端横梁段，端横梁段的接缝面竖向交错分布有凹型剪力键和凸型剪力键且涂刷有胶粘剂、内部预埋有波纹管；既有桥墩顶端与既有盖梁相连部分凿除后再浇筑并安装大吨位支座；同跨所有的既有空心板横向拼接，拼接后端横梁段之间通过接缝面上的凹型剪力键和凸型剪力键相互咬合、端横梁段依次对接形成端横梁、波纹管依次对接形成横向通道，预应力钢绞线穿过对应的横向通道并对端横梁横向两端施加预应力，端横梁通过两个大吨位支座分别支撑在两个既有桥墩上。本发明从根本上避免了支座脱空，提升了既有空心板和铰缝的使用寿命。
Existing hollow slab girder bridge reinforcing structure and method for preventing support from disengaging
The invention discloses an existing hollow slab girder bridge reinforcing structure and method for preventing a support from disengaging. After the two ends of a bottom plate of an existing hollow slab are subjected to chiseling and bar planting treatment, an end cross beam section is poured below the bottom plate, concave shear keys and convex shear keys are vertically distributed on the joint face of the end cross beam section in a staggered mode, the joint face of the end cross beam section is coated with adhesive, and corrugated pipes are embedded in the joint face of the end cross beam section; a large-tonnage support is poured and installed after the connecting part of the top end of the existing pier and the existing bent cap is chiseled away; all existing hollow slabs in the same span are transversely spliced, the spliced end cross beam sections are meshed with one another through concave shear keys and convex shear keys on joint faces, the end cross beam sections are sequentially in butt joint to form end cross beams, and corrugated pipes are sequentially in butt joint to form transverse channels. The prestressed steel strands penetrate through the corresponding transverse channels and apply prestress to the two transverse ends of the end cross beams, and the end cross beams are supported on the two existing piers through the two large-tonnage supports respectively. According to the invention, the disengagement of the support is fundamentally avoided, and the service life of the existing hollow plate and the hinge joint is prolonged.
本发明公开了一种防止支座脱空的既有空心板梁桥加固结构及方法，既有空心板的底板两端凿毛植筋处理后下方浇筑端横梁段，端横梁段的接缝面竖向交错分布有凹型剪力键和凸型剪力键且涂刷有胶粘剂、内部预埋有波纹管；既有桥墩顶端与既有盖梁相连部分凿除后再浇筑并安装大吨位支座；同跨所有的既有空心板横向拼接，拼接后端横梁段之间通过接缝面上的凹型剪力键和凸型剪力键相互咬合、端横梁段依次对接形成端横梁、波纹管依次对接形成横向通道，预应力钢绞线穿过对应的横向通道并对端横梁横向两端施加预应力，端横梁通过两个大吨位支座分别支撑在两个既有桥墩上。本发明从根本上避免了支座脱空，提升了既有空心板和铰缝的使用寿命。
Existing hollow slab girder bridge reinforcing structure and method for preventing support from disengaging
防止支座脱空的既有空心板梁桥加固结构及方法
LIU YUWEN (author) / CHENG JIANBO (author) / CHEN WEI (author) / WANG YANG (author) / WANG XUEPING (author) / YANG XU (author) / YU QIAO (author)
2022-12-16
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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