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A platform for research: civil engineering, architecture and urbanism
Hybrid beam box girder bridge longitudinally spliced by shear keys and construction method
The invention relates to a hybrid beam box girder bridge longitudinally spliced by shear keys and a construction method. The box girder bridge is formed by splicing box girder sections of a prestressed concrete girder section and an ultra-high performance concrete girder section through longitudinal prestress in the longitudinal bridge direction. Protruding shear keys made of ultra-high-performance concrete materials are arranged at the two ends of the ultra-high-performance concrete beam section, round holes allowing longitudinal steel bars to penetrate through and reserved longitudinal prestress openings are formed in the cross section of the beam section, and the ultra-high-performance concrete beam section is a prefabricated part of a hollow prefabricated plate type structure. The prestressed concrete beam section is cast in situ. By arranging the shear keys made of the ultra-high performance concrete, the problem that under the action of long-term repeated loads, an original common concrete shear key structure is prone to abrasion and damage is solved; compared with existing common concrete shear key connection, longitudinal connection of the box girder bridge with the longitudinally-spliced segments through the method is safer and more reliable.
本发明涉及一种采用剪力键纵向拼接的混合梁箱梁桥及施工方法，所述箱梁桥在纵桥向由预应力混凝土梁段和超高性能混凝土梁段的箱梁梁段通过纵向预应力进行拼接而成，所述超高性能混凝土梁段的两端布置有凸起的由超高性能混凝土材料组成的剪力键且在梁段的横截面上布置有供纵向钢筋穿过的圆孔和预留的纵向预应力开口，所述超高性能混凝土梁段为中空的预制板式结构的预制件，所述预应力混凝土梁段由现场浇筑。通过设置材料为超高性能混凝土的剪力键，从而避免了原有普通混凝土剪力键在长期反复荷载的作用下，剪力键结构容易发生磨损和病害的问题，通过本发明方法进行节段纵向拼接的箱梁桥的纵向连接较现有的普通混凝土剪力键连接更加安全可靠。
Hybrid beam box girder bridge longitudinally spliced by shear keys and construction method
The invention relates to a hybrid beam box girder bridge longitudinally spliced by shear keys and a construction method. The box girder bridge is formed by splicing box girder sections of a prestressed concrete girder section and an ultra-high performance concrete girder section through longitudinal prestress in the longitudinal bridge direction. Protruding shear keys made of ultra-high-performance concrete materials are arranged at the two ends of the ultra-high-performance concrete beam section, round holes allowing longitudinal steel bars to penetrate through and reserved longitudinal prestress openings are formed in the cross section of the beam section, and the ultra-high-performance concrete beam section is a prefabricated part of a hollow prefabricated plate type structure. The prestressed concrete beam section is cast in situ. By arranging the shear keys made of the ultra-high performance concrete, the problem that under the action of long-term repeated loads, an original common concrete shear key structure is prone to abrasion and damage is solved; compared with existing common concrete shear key connection, longitudinal connection of the box girder bridge with the longitudinally-spliced segments through the method is safer and more reliable.
本发明涉及一种采用剪力键纵向拼接的混合梁箱梁桥及施工方法，所述箱梁桥在纵桥向由预应力混凝土梁段和超高性能混凝土梁段的箱梁梁段通过纵向预应力进行拼接而成，所述超高性能混凝土梁段的两端布置有凸起的由超高性能混凝土材料组成的剪力键且在梁段的横截面上布置有供纵向钢筋穿过的圆孔和预留的纵向预应力开口，所述超高性能混凝土梁段为中空的预制板式结构的预制件，所述预应力混凝土梁段由现场浇筑。通过设置材料为超高性能混凝土的剪力键，从而避免了原有普通混凝土剪力键在长期反复荷载的作用下，剪力键结构容易发生磨损和病害的问题，通过本发明方法进行节段纵向拼接的箱梁桥的纵向连接较现有的普通混凝土剪力键连接更加安全可靠。
Hybrid beam box girder bridge longitudinally spliced by shear keys and construction method
一种采用剪力键纵向拼接的混合梁箱梁桥及施工方法
LI CHUANJUN (author) / GUO BAOLIN (author) / WU QINGXIONG (author) / YANG YI (author) / LIU FUZHONG (author) / LI SHIMIN (author) / HUANG WANKUN (author) / ZHANG HUANTAO (author) / LIU SHUAI (author) / CHEN KANGMING (author)
2021-02-23
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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