A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a method for reinforcing the transverse overall performance of a prefabricated hollow slab girder, which comprises the following steps of: firstly, chiseling away a bridge deck pavement, a common cast-in-place concrete layer and a bottom carbonized concrete layer of the existing hollow slab girder, and then drilling mounting holes of a vertical prestress system at a hinge joint on the existing hollow slab girder along the longitudinal direction at certain intervals; then steel bars of the upper-layer ultra-high-performance reinforced concrete cast-in-situ slabs and steel bars of the lower-layer ultra-high-performance reinforced concrete cast-in-situ slabs are bounded on the upper face and the lower face of the existing hollow slab girder respectively, and anchorage devices and steel bars at lower ends of vertical prestress systems are pre-buried; and upper and lower ultra-high-performance reinforced concrete cast-in-situ slabs are poured onto the upper face and the lower face of the existing hollow slab girder respectively; and then the vertical prestress systems are tensioned, the mounting holes are poured and filled, and finally pavement paving is recovered. The problem of hinge joint cracking is solved, the situation that a single plate is stressed is avoided, the overall stability of an existing hollow slab girder is enhanced, the beam section is increased, and the service life of a bridge is prolonged.
本发明公开了一种加强预制空心板梁横向整体性能的方法，先凿除既有空心板梁的桥面铺装、普通现浇混凝土层、底部的碳化混凝土层，然后在既有空心板梁上铰缝处沿纵向每隔一定距离钻出竖向预应力系统的安装孔，然后在既有空心板梁的上、下面分别绑扎上、下层超高性能钢筋混凝土现浇板的钢筋，预埋竖向预应力系统下端锚具和钢筋，然后在既有空心板梁的上、下面分别浇筑上、下层超高性能钢筋混凝土现浇板，然后张拉竖向预应力系统并浇灌填充安装孔，最后恢复路面铺装。本发明解决了铰缝开裂的问题，避免了单板受力的情况，加强了既有空心板梁整体稳定性，增加了梁截面，延长了桥梁使用寿命。
The invention discloses a method for reinforcing the transverse overall performance of a prefabricated hollow slab girder, which comprises the following steps of: firstly, chiseling away a bridge deck pavement, a common cast-in-place concrete layer and a bottom carbonized concrete layer of the existing hollow slab girder, and then drilling mounting holes of a vertical prestress system at a hinge joint on the existing hollow slab girder along the longitudinal direction at certain intervals; then steel bars of the upper-layer ultra-high-performance reinforced concrete cast-in-situ slabs and steel bars of the lower-layer ultra-high-performance reinforced concrete cast-in-situ slabs are bounded on the upper face and the lower face of the existing hollow slab girder respectively, and anchorage devices and steel bars at lower ends of vertical prestress systems are pre-buried; and upper and lower ultra-high-performance reinforced concrete cast-in-situ slabs are poured onto the upper face and the lower face of the existing hollow slab girder respectively; and then the vertical prestress systems are tensioned, the mounting holes are poured and filled, and finally pavement paving is recovered. The problem of hinge joint cracking is solved, the situation that a single plate is stressed is avoided, the overall stability of an existing hollow slab girder is enhanced, the beam section is increased, and the service life of a bridge is prolonged.
本发明公开了一种加强预制空心板梁横向整体性能的方法，先凿除既有空心板梁的桥面铺装、普通现浇混凝土层、底部的碳化混凝土层，然后在既有空心板梁上铰缝处沿纵向每隔一定距离钻出竖向预应力系统的安装孔，然后在既有空心板梁的上、下面分别绑扎上、下层超高性能钢筋混凝土现浇板的钢筋，预埋竖向预应力系统下端锚具和钢筋，然后在既有空心板梁的上、下面分别浇筑上、下层超高性能钢筋混凝土现浇板，然后张拉竖向预应力系统并浇灌填充安装孔，最后恢复路面铺装。本发明解决了铰缝开裂的问题，避免了单板受力的情况，加强了既有空心板梁整体稳定性，增加了梁截面，延长了桥梁使用寿命。
Method for reinforcing the transverse overall performance of prefabricated hollow slab girder
加强预制空心板梁横向整体性能的方法
LIU YUWEN (author)
2022-01-28
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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