Segmented dry connection method for prefabricated cover beam
A technology of covering beams and dry joints, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problem of slow speed and achieve the effect of fast loading and unloading
Inactive Publication Date: 2021-08-24
ZHEJIANG COMM CONSTR GRP CO LTD +1
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Problems solved by technology
[0002] In the construction of viaducts, it is often necessary to splice some large sections to the cantilever section of the cover beam. First, the cantilever section of the cover beam is approached to the cantilever section of the cover beam through the hoisting device, and then concrete is poured between the section and the cantilever section of the cover beam. , this splicing method is slow
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[0026] see Figure 1 to Figure 5 , a prefabricated cover beam segmental dry connection method, the specific steps are:
[0027] Step a: apply adhesive on the end of segment 1; in step a, when applying the adhesive, the thickness of the adhesive is controlled at 2.5 mm, and at the same time, in order to prevent the adhesive from blocking the channel 6, the adhesive Keep a distance of at least 3 cm from the outer edge of the tunnel 6.
[0028] Step b: use the hoisting device to lift the segment 1, and attach the end of the segment 1 coated with adhesive to the cantilever segment 2 of the cover beam;
[0029] Step c: set two top prestressed tendons 3 on the upper side of the cantilever section 2 of the cover beam, set one side prestressed tendon 4 on the left and right sides of the cantilever section 2 of the cover beam, and connect one end of the top prestressed tendons 3 On the cantilever section 2 of the cover beam, the other end of the top prestressed tendon 3 is connected ...
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The invention discloses a segmental dry connection method for a prefabricated cover beam, and relates to the technical field of construction methods. The method comprises the steps of a, coating an adhesive on the end part of the segment; b, hoisting the sections through a hoisting device, and attaching the ends, smeared with the adhesives, of the sections to the cantilever section of the bent cap; c, arranging top prestressed tendons and side prestressed tendons; d, tensioning the top prestressed tendons and the side prestressed tendons through a jack, in the tensioning process, gradually reducing the tension on the segments by the hoisting device, and finally separating the hoisting device and the segments; and e, making steel strands penetrate through the hole channels of the cantilever sections and the sections of the bent cap and tensioning to the design value. The segmental dry connection method has the beneficial effects that rapid splicing construction is achieved by adopting the scheme of temporary tensioning and bonding agents, and meanwhile rapid assembly and disassembly of the lifting ropes are achieved through the connectors.
Description
technical field [0001] The invention belongs to the technical field of construction methods, and in particular relates to a method for dry jointing of prefabricated cover beams in sections. Background technique [0002] In the construction of viaducts, it is often necessary to splice some large sections to the cantilever section of the cover beam. First, the cantilever section of the cover beam is approached to the cantilever section of the cover beam through the hoisting device, and then concrete is poured between the section and the cantilever section of the cover beam. , this splicing method is slow. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and propose a method for dry jointing of prefabricated cover beams with fast construction speed. [0004] In order to achieve the above object, the present invention adopts the following technical solutions: [0005] A prefabricated cov...
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IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 宁英杰杨延龙白丽辉赵颖超迟文明黄祎涵龚世文李清云梨果陈旭光
Owner ZHEJIANG COMM CONSTR GRP CO LTD