Temporary hinged structure for arched continuous beam bridge, as well as construction method thereof
A temporary and hinged technology, applied in bridges, bridge materials, bridge construction, etc., can solve problems such as uneven bending moment, poor settlement displacement, and inability to guarantee construction quality, so as to ensure construction quality, prevent uneven settlement, and avoid Effects of Concrete Stratification and Cracks
Inactive Publication Date: 2015-04-29
CCCC SECOND HARBOR ENG
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Problems solved by technology
If the arched continuous beam concrete is poured without temporary hinges, if the bracket method is used for construction, the small stiffness of the bracket will cause uneven settlement of the arched continuous beam, so that the bending stress at the arch foot of the arched continuous beam will be relatively large, causing the arch Cracks in the concrete at the feet seriously affect the pouring quality of the box girder
Another traditional construction method is to set temporary hinges, but the general type of temporary hinges is ordinary pads, including concrete pads or steel pads. This type of temporary hinge has certain defects, and pads can release arched continuous beams. Due to the bending moment caused by uneven settlement, it is difficult to ensure the settlement displacement difference of the arched continuous beam at the position of the pad only by the friction of the pad, and the arc continuity of the box girder is affected, which cannot guarantee the construction quality
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[0033] Such as Figure 1-8 As shown, during specific implementation, a pair of rotating temporary hinges are used to release the bending moment of the arched beam, so as to achieve a function that cannot be realized by ordinary temporary hinges. Wherein, the structure of the first temporary hinge 19 is: including a rigid first ear plate 9 and third lug plate 17, such as Figure 6-8 The first ear plate 9 includes a first bottom plate 23 and two first clips 24 that are fixed on the first bottom plate 23 and arranged symmetrically close to each other, such as Figure 3-5 , the third ear plate 17 includes a second bottom plate 25 and two second clamping pieces 26 arranged at intervals fixed on the upper end of the second bottom plate 25, wherein the first screw holes 7 are provided on the two first clamping pieces 24, and the two pieces The second clip 26 is provided with a third screw hole 15, the second clip 26 is sleeved in the gap in the middle of the first clip 24, and the b...
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The invention relates to the field of bridge beam construction, and particularly relates to a temporary hinged structure for arched continuous beam bridge, as well as a construction method thereof. Ear plate pin shaft type temporary hinges are arranged between V-shaped legs and main piers, so that the V-shaped legs can be connected onto the main piers in a vertical rotating manner, a rigid pin shaft temporary hinge can also bear large shearing force so as to well limit the vertical displacement of an arched continuous beam and prevent differential settlement, meanwhile, a rigid pin shaft temporary can also well release bending moment so as to guarantee no bending stress at the arch foot positions of the arched continuous beam and achieve the effects of both limiting the displacement and releasing the bending moment, so that the concrete staggered floor and cracks can be avoided, and the construction quality of the arched continuous beam can be guaranteed.
Description
technical field [0001] The invention relates to the field of bridge construction, in particular to a temporary hinge structure for an arched continuous girder bridge and a construction method thereof. Background technique [0002] For the construction of arched continuous beams, there are generally two traditional construction methods, one is not to set temporary hinges, and the other is to set temporary hinges. If the arched continuous beam concrete is poured without temporary hinges, if the bracket method is used for construction, the small stiffness of the bracket will cause uneven settlement of the arched continuous beam, so that the bending stress at the arch foot of the arched continuous beam will be relatively large, causing the arch Cracks occurred in the concrete at the feet, which seriously affected the pouring quality of the box girder. Another traditional construction method is to set temporary hinges, but the general type of temporary hinges is ordinary pads, i...
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IPC IPC(8): E01D21/00
CPCE01D21/00E01D2101/28
Inventor 胡义新周益军李文俊曹勤涛刘宁波薛益中宋永哲马琼峰李君好唐江平
Owner CCCC SECOND HARBOR ENG