Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a prefabricated UHPC shell-steel plate-common concrete combined bent cap and a construction technology, and belongs to the technical field of bridge structures. The bent cap structure is composed of a UHPC shell, full-length reinforcing steel bars, a profile steel framework, a plurality of prestressing tendons and post-poured common concrete, wherein the UHPC shell is provided with a disassembly-free inner mold steel plate and the upper portion of the bent cap appearance is open, and the full-length reinforcing steel bars, the profile steel framework and the prestressing tendons need to be tensioned in batches are arranged in a cavity of the shell. Shear nails are arranged on the two sides of the inner mold steel plate to enhance combination with inner and outer concrete. In the construction process, the UHPC shell with the preset internal steel bars, the section steel combined framework and the tensioning part of the prestressing tendons is hoisted to the top of the bridge stand column, the stand column top steel bars are inserted into holes in the corresponding positions of the UHPC shell, common concrete in an inner cavity of the shell is poured, and the remaining prestressing tendons are tensioned in batches in good time in the later period to form the novel combined cover beam structure. According to the capping beam structure and the construction process, cast-in-place capping beam construction outer formworks and supports can be omitted, traffic interference is reduced, and procedures are reduced; compared with a fully-prefabricated cover beam, the transportation and hoisting weight is light, and the cost is reduced.
本发明公开了一种预制UHPC外壳‑钢板‑普通混凝土组合的盖梁及施工工艺，属于桥梁结构技术领域，盖梁结构由带有免拆内模钢板的盖梁外形上部敞口的UHPC壳体、壳体空腔内的通长钢筋、型钢骨架和若干需分批张拉的预应力束、壳体空腔内部后浇的普通混凝土组成。内模钢板两侧有剪力钉增强与内外侧混凝土的结合。施工过程中先将预置内部钢筋、型钢组合骨架和张拉部分预应力束的UHPC壳体吊装至桥梁立柱顶部，UHPC壳体对应位置孔位插入立柱顶部钢筋，浇筑壳体内腔普通混凝土，后期适时分批张拉剩余预应力束形成新型组合盖梁结构。该盖梁结构和施工工艺可取消现浇盖梁施工外模板和支架，降低交通干扰，减少工序；较全预制盖梁运输及吊装重量轻，降低成本。
The invention discloses a prefabricated UHPC shell-steel plate-common concrete combined bent cap and a construction technology, and belongs to the technical field of bridge structures. The bent cap structure is composed of a UHPC shell, full-length reinforcing steel bars, a profile steel framework, a plurality of prestressing tendons and post-poured common concrete, wherein the UHPC shell is provided with a disassembly-free inner mold steel plate and the upper portion of the bent cap appearance is open, and the full-length reinforcing steel bars, the profile steel framework and the prestressing tendons need to be tensioned in batches are arranged in a cavity of the shell. Shear nails are arranged on the two sides of the inner mold steel plate to enhance combination with inner and outer concrete. In the construction process, the UHPC shell with the preset internal steel bars, the section steel combined framework and the tensioning part of the prestressing tendons is hoisted to the top of the bridge stand column, the stand column top steel bars are inserted into holes in the corresponding positions of the UHPC shell, common concrete in an inner cavity of the shell is poured, and the remaining prestressing tendons are tensioned in batches in good time in the later period to form the novel combined cover beam structure. According to the capping beam structure and the construction process, cast-in-place capping beam construction outer formworks and supports can be omitted, traffic interference is reduced, and procedures are reduced; compared with a fully-prefabricated cover beam, the transportation and hoisting weight is light, and the cost is reduced.
本发明公开了一种预制UHPC外壳‑钢板‑普通混凝土组合的盖梁及施工工艺，属于桥梁结构技术领域，盖梁结构由带有免拆内模钢板的盖梁外形上部敞口的UHPC壳体、壳体空腔内的通长钢筋、型钢骨架和若干需分批张拉的预应力束、壳体空腔内部后浇的普通混凝土组成。内模钢板两侧有剪力钉增强与内外侧混凝土的结合。施工过程中先将预置内部钢筋、型钢组合骨架和张拉部分预应力束的UHPC壳体吊装至桥梁立柱顶部，UHPC壳体对应位置孔位插入立柱顶部钢筋，浇筑壳体内腔普通混凝土，后期适时分批张拉剩余预应力束形成新型组合盖梁结构。该盖梁结构和施工工艺可取消现浇盖梁施工外模板和支架，降低交通干扰，减少工序；较全预制盖梁运输及吊装重量轻，降低成本。
Prefabricated UHPC (Ultra High Performance Concrete) shell-steel plate-common concrete combined cover beam and construction process
一种预制UHPC外壳-钢板-普通混凝土组合盖梁及施工工艺
LIU CIJUN (Autor:in)
14.05.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
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