A structure for improving the integrity of an externally prestressed precast segmental beam bridge
An external prestressing and integral technology, applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problems of easy opening, low stiffness, low bearing capacity, etc., to suppress joint opening, improve overall performance and stiffness , the effect of improving the carrying capacity
Inactive Publication Date: 2019-01-15
GUANGDONG UNIV OF TECH
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Problems solved by technology
Although prefabricated segmental beams have so many advantages, because the precast segmental concrete bridges of external beams are easy to open at the joints, the stiffness of precast segmental beam bridges is low, and the bearing capacity is lower than that of integral beams, which limits its further promotion. application
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[0012] The present invention will be described in further detail below in conjunction with the examples, but the embodiments of the present invention are not limited thereto. Example:
[0013] like figure 1 As shown, the following combined with figure 1 The description and detailed description further illustrate the present invention.
[0014] like figure 1 As shown, the structure for improving the integrity of externally prestressed prefabricated segmental girder bridges includes prefabricated segmental concrete beams 1, wherein the prefabricated segmental beams 1 are spliced together by stretching externally prestressed tendons 5, and the bottom of the prefabricated beams 1 The steel plate 4 is attached to the outside, the screw rod 2 is inserted into the reserved channel of the prefabricated segment beam and passes through the reserved hole of the steel plate 4, and the nut is tightened at the bottom of the screw rod 2.
[0015] In this embodiment, epoxy resin is appl...
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The invention relates to a structure for improving the integrity of an externally prestressed precast segmental beam bridge, belonging to the bridge engineering field. The structure comprises precastsegmental beams, screws, nuts and a high-strength steel plates. After the segmental beams are spliced by using the external stress ribs, the high-strength steel plates are pasted to the outsides of the bottoms of the adjacent segmental beams. At the same time, the high-strength screw rods pass through the hole reserved near the joint of the segment beams and the holes reserved by the external steel plate, the nuts are tightened, the steel plates at the bottom of the prefabricated beam are fixed, and finally, epoxy resin mortar is poured around the screw rods. The high-strength screw can form amore solid whole with the outer sticking steel plate and the segmental beam. The structure of the invention can improve the connectivity between adjacent segmental beams, delay the opening of joints,and simultaneously improve the rigidity and bearing capacity of the externally prestressed precast segmental beam bridge. Compared with the existing technology, the structure can greatly improve theintegrity of the external prestressed precast segmental beam and construction is convenient.
Description
technical field [0001] The invention relates to a structure for improving the integrity of an externally prestressed prefabricated segmental girder bridge, which belongs to the field of bridge engineering. Background technique [0002] Since 2016, the Ministry of Construction and the Ministry of Communications have issued several documents to promote prefabricated construction in response to rising labor costs in my country and the upgrading of the traditional construction industry. Beijing, Shanghai, Jinan and other places have also issued local standards to support the promotion and application of prefabricated construction technology. . [0003] The prefabricated assembly construction method of the bridge is to divide the girder body into several segments, which are prefabricated in the prefabrication plant and then transported to the bridge site for assembly. This is a construction method for medium-span girder bridges. Due to the prefabrication in the factory in advance...
Claims
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IPC IPC(8): E01D19/00E01D21/00
CPCE01D19/00E01D21/00
Inventor 李宇鸿姜海波
Owner GUANGDONG UNIV OF TECH