Prestressed ultrahigh-performance concrete continuous box girder bridge and construction method thereof
A concrete box girder, ultra-high-performance technology, applied in bridges, bridge materials, bridge construction, etc., can solve the problems of excessive span deflection of the main girder, heavy structure, and low tensile strength, so as to reduce the risk of cracking and improve construction efficiency. The method is simple and the effect of reducing the self-weight of the structure
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[0028] Example 1:
[0029] Kind of like Figure 1 ~ Figure 4 The prestressed ultra-high performance concrete continuous box girder bridge of the present invention is shown. The continuous box girder bridge has a span arrangement of 290m+450m+290m and adopts a continuous rigid frame bridge design. The continuous box girder bridge includes a bridge pier 1. And the ultra-high performance concrete box girder 2 supported by the pier 1, the ultra-high performance concrete box girder 2 adopts the overall external prestressing system; the ultra-high performance concrete box girder 2 is mainly composed of the top plate 21, the bottom plate 22, the web 23 and the diaphragm The top plate 21, the bottom plate 22, the web 23 and the transverse partition 24 all adopt thin plates.
[0030] In this embodiment, the thickness a of the top plate 21 of the ultra-high performance concrete box girder 2 is 0.20m (0.15m~0.30m is acceptable); the thickness b of the bottom plate 22 of the ultra-high perfor...
Example Embodiment
[0039] Example 2:
[0040] Kind of like Figure 5 ~ Figure 8 The prestressed ultra-high performance concrete continuous box girder bridge of the present invention is shown. The continuous box girder bridge has a span arrangement of 280m+400m+280m and adopts a continuous girder bridge design. The continuous box girder bridge includes pier 1 and The ultra-high performance concrete box girder 2 supported by the bridge pier 1. The ultra-high performance concrete box girder 2 adopts a partial external prestressing system; the ultra-high performance concrete box girder 2 is mainly composed of a top plate 21, a bottom plate 22, a web 23 and a diaphragm 24 The top plate 21, the bottom plate 22, the web 23 and the transverse partition 24 are all made of thin plates, and the ultra-high performance concrete box girder 2 is provided with internal prestressed steel beam channels 25.
[0041] In this embodiment, the thickness a of the top plate 21 of the ultra-high-performance concrete box gir...
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