CN209760027U - hollow core slab structure - Google Patents
hollow core slab structure Download PDFInfo
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- CN209760027U CN209760027U CN201920212171.9U CN201920212171U CN209760027U CN 209760027 U CN209760027 U CN 209760027U CN 201920212171 U CN201920212171 U CN 201920212171U CN 209760027 U CN209760027 U CN 209760027U
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- hollow
- transverse
- slab
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- prestressed
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Abstract
The utility model discloses a prefabricated hollow plate structure, include: the transverse two sides of each prefabricated hollow slab are respectively provided with a first wavy surface and a second wavy surface which are mutually meshed and matched, a plurality of prefabricated hollow slabs are transversely assembled, adjacent prefabricated hollow slabs form wavy cementing joints through meshing of the first wavy surfaces and the second wavy surfaces, and epoxy resin is filled in the cementing joints; the transverse prestressed pieces are transversely arranged on the assembled precast hollow plates in a pulling mode, and two ends of each transverse prestressed piece are respectively anchored on the side face of the precast hollow plate on the outermost side. By adopting the precast hollow slab structure, the problem that the hinge joint is damaged easily caused by the existing precast hollow slab can be solved, and the safety of a bridge structure is improved.
Description
Technical Field
The utility model relates to a well small-span bridge technical field, concretely relates to prefabricated hollow plate structure.
Background
At present, the bridge deck of the concrete precast bridge with medium and small span generally adopts precast hollow slabs, T-shaped beams or small box beams, more precast hollow slabs are generally adopted for spans below 16m, and precast T-shaped beams or small box beams are generally adopted for spans above 20 m. The prefabricated hollow slab has good economical efficiency, is simple in design and construction, is an ideal structural form for small and medium-span bridges, but has more hinge joint diseases on the bridge deck according to statistics of bridge operation disease conditions, namely, longitudinal cracks are generated along slab joints under the action of vehicle load and are reflected to the bridge deck for pavement, so that the transverse integrity between beam slabs is reduced, and the safety of the bridge structure is influenced; meanwhile, after the bridge deck pavement is damaged, rainwater permeates into the bridge deck system and the hinge joints to accelerate the corrosion of the bridge deck reinforcing mesh, the connecting reinforcing steel bars among the hinge joints and the stress reinforcing steel bars of the hollow plates.
Through statistical analysis of disease conditions, the following main points are found out to be the causes of the hollow slab hinge joint disease of the precast hollow slab bridge deck:
1) The hinge joint between the hollow plates has small structural size, and small stone concrete can only be inserted and tamped when being poured into the hinge joint and cannot be vibrated, so that the hinge joint is difficult to be filled and compacted, and the quality of hinge joint concrete is influenced;
2) When in construction, the side surface of the core slab has insufficient scabbling roughness, thereby reducing the adhesive force of new concrete and old concrete between the prefabricated hollow slab and the hinge joint concrete;
3) No transverse pressure exists between adjacent hollow slabs, and the integrity of the hinge joint position is poor;
4) Under the overload action of the automobile, the damage speed of hinge joint concrete is accelerated under the long-term repeated action of the overloaded vehicle;
5) Due to the fact that drainage of the bridge deck is not smooth, and some bridge decks are poor in waterproof performance, rainwater permeates into hinge joint concrete to cause corrosion of reinforcing steel bars, and the damage degree of hinge joints is further aggravated.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a prefabricated hollow slab structure to solve current prefabricated hollow slab and cause the hinge seam to destroy easily, influence the problem of bridge construction safety.
for reaching the above technical effect, the utility model discloses a technical scheme is:
a precast hollow slab structure comprising: the prefabricated hollow slab comprises prefabricated hollow slabs and transverse prestress members, wherein a first wavy surface and a second wavy surface which are mutually meshed and matched are respectively arranged on two transverse sides of each prefabricated hollow slab, a plurality of the prefabricated hollow slabs are transversely assembled, adjacent prefabricated hollow slabs form wavy cementing joints through meshing of the first wavy surface and the second wavy surface, and epoxy resin is filled in the cementing joints; the transverse prestressed pieces are transversely arranged on the assembled precast hollow plates in a pulling mode, and two ends of each transverse prestressed piece are respectively anchored on the side face of the precast hollow plate on the outermost side.
Further, the transverse prestress members are arranged in the hollow core slabs.
Furthermore, the hollow core slabs are provided with transversely through prestressed holes, a plurality of hollow core slabs are transversely assembled to enable the prestressed holes in the corresponding positions of the hollow core slabs to be linearly communicated, one transverse prestressed member penetrates through the prestressed hole in each group of linearly communicated prestressed holes, and two ends of each transverse prestressed member are respectively anchored on the side face of the outermost hollow core slab.
Furthermore, a rubber cushion block is arranged in a prestress hole of the hollow precast slab, and a connecting hole matched with the transverse prestress piece is formed in the rubber cushion block.
Furthermore, the prestressed holes are arranged on the upper side and the lower side of the hollow core slab.
Further, the transverse prestress piece is arranged outside the hollow core slab.
Furthermore, the transverse prestressing member is transversely arranged above and/or below the hollow core slab in a pulling mode, and two ends of the transverse prestressing member are respectively fixed on the lateral surface of the hollow core slab on the outermost side in the transverse direction.
furthermore, a fixing piece is arranged on the lateral surface of the hollow core slab positioned on the outermost side in the transverse direction, and two ends of the transverse prestress piece are respectively fixed on the fixing piece on one side.
Further, the transverse prestressing member is a carbon fiber rod or a prestressing tendon.
furthermore, a bridge deck pavement layer is laid above the precast hollow slab.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the hinge joints of the original prefabricated hollow slab are adjusted to be wavy cemented joints and filled with epoxy resin, so that vertical shearing force between the prefabricated hollow slabs can be effectively transmitted, bridge deck diseases caused by untight hinge joint construction are solved from the root cause, the problem that the hinge joints of the prefabricated hollow slab are easy to damage is solved, and the safety of a bridge structure is improved;
2. the transverse prestressed pieces are added to strengthen the transverse integrity of the hollow precast slabs, and meanwhile, the friction force between the hollow precast slabs is increased through mutual extrusion, so that the inter-slab shear force under the vehicle load can be overcome, and bridge deck diseases caused by insufficient transverse connecting force of hinge joints in the operation process are avoided;
3. On the basis of increasing the transverse integrity of the prefabricated hollow slab, an integrated layer formed by integrally casting concrete above the assembled traditional prefabricated slab in situ can be eliminated, the material consumption is reduced, and the construction period is shortened;
4. Compared with the traditional precast hollow slabs, T beams and small box beams, the cast-in-place wet joint and the wet joint maintenance time are saved, and the construction time is short;
5. After the integrity of the bridge deck is strengthened through the transverse prestressed pieces and the wavy cementing joints, the application range of the span of the prefabricated hollow slab can be further enlarged, and the bridge deck has more advantages than a prefabricated small box girder and a prefabricated T girder on a bridge with the span of more than 20 m;
6. Compared with the existing hinge joint processing mode of the prefabricated hollow slab, the utility model provides a disease appears even in a certain hollow slab of prefabricated hollow slab structure, only need lift bridge deck pavement, relax horizontal prestressing force spare after, a certain hollow slab stretch-draw again in the middle of the replacement can, demolish the convenience, more can be applied to interim bridge to reuse after can demolising.
Drawings
FIG. 1 is a schematic plan view of a bridge deck structure according to the present invention;
FIG. 2 is a schematic view of a vertical plane of a bridge deck structure according to the present invention;
FIG. 3 is a schematic cross-sectional view of a bridge deck structure according to the present invention;
FIG. 4 is a schematic sectional view of the hollow core slab of the present invention;
FIG. 5 is a schematic structural view of a cemented seam according to the present invention;
Fig. 6 is a schematic structural view of the fixing member of the present invention;
Reference numerals: 1-a prefabricated hollow slab, 11-a first wavy surface, 12-a second wavy surface, 13-a prestressed hole, 14-a rubber cushion block, 2-a transverse prestressed part, 3-a cementing seam, 4-epoxy resin, 5-a bridge deck pavement layer, 6-a fixing part, 61-a section steel member, 62-an embedded part and 7-an anchoring part.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced components or structures must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered as limiting the present invention.
As shown in fig. 1 to 5, the prefabricated hollow slab structure provided in this embodiment mainly includes: the prefabricated hollow slab comprises a prefabricated hollow slab 1 and a transverse prestress piece 2.
Compared with the existing hollow slab, the horizontal both sides of the hollow slab 1 that this embodiment provided set up first wavy surface 11 and second wavy surface 12 of mutual interlock adaptation respectively, thereby when polylith hollow slab 1 transversely assembles, adjacent hollow slab 1 forms wavy cementation joint 3 through first wavy surface 11 and the interlock of second wavy surface 12, and set up epoxy 4 in cementation joint 3, as shown in fig. 5, thereby effectively transmit the vertical shear force between hollow slab 1, solved the bridge floor disease that comes because of the hinge joint construction is not closely knit from the root cause. Epoxy 4 can be coated on first wavy surface 11 and second wavy surface 12 before assembling to realize naturally filling, construction convenience to cementation seam 3 after the concatenation.
when 1 polylith of hollow core slab transversely is assembled, transversely draw at it and establish horizontal prestressing force piece 2, the both ends of horizontal prestressing force piece 2 anchor respectively on the side of hollow core slab 1 in the outside, thereby realize the horizontal pretension to hollow core slab 1, strengthen the horizontal wholeness of hollow core slab 1, simultaneously through mutual extrusion, increase the frictional force between the hollow core slab 1, with this interplate shear force under overcoming the vehicle load, the bridge floor disease that the operation in-process hinge joint appears because of transverse connection power is not enough has been avoided.
the transverse prestressing elements 2 may be arranged inside the hollow core slabs 1. Specifically, as shown in fig. 2 to 4, the hollow core slabs 1 are internally provided with transverse through prestressed holes 13, when a plurality of hollow core slabs 1 are transversely assembled, the prestressed holes 13 at corresponding positions of the hollow core slabs 1 are linearly communicated, a transverse prestressed member 2 is inserted into each group of the linearly communicated prestressed holes 13, and two ends of each transverse prestressed member 2 are respectively anchored on the side surfaces of the outermost hollow core slabs 1.
Meanwhile, referring to fig. 2 and 4, the present embodiment is provided with rubber blocks 14 in the prestressing holes 13 of the hollow core slab 1 to assist in tensioning of the transverse prestressing force. Specifically, the rubber cushion blocks 14 are poured in the hollow precast slabs 1 in a pre-buried mode, the size of the hollow precast slabs 1 cannot be weakened, the longitudinal stress of the hollow precast slabs 1 is almost not affected, the rubber cushion blocks 14 are provided with connecting holes matched with the transverse prestressed pieces 2, and the transverse prestressed pieces 2 penetrate through the connecting holes, so that the transverse prestressed pieces 2 are positioned more specifically and accurately, and the transverse prestressed pieces 2 are located at the best working positions. The prestressing holes 13 of the above-described structure are preferably formed at both the upper and lower sides of the hollow slab 1 so as to apply lateral prestressing to both the top and bottom of the hollow slab 1, thereby further enhancing the lateral integrity of the hollow slab 1.
The transverse prestressing member 2 can be arranged outside the hollow slab 1, specifically, the transverse prestressing member can be transversely pulled above or below the hollow slab 1, or pulled above and below the hollow slab simultaneously, and two ends of the transverse prestressing member 2 are similarly fixed on the lateral surface of the hollow slab 1 on the outermost side, so that the effect of increasing transverse prestressing force can be achieved. The end of the transverse prestressing element 2 is fixed by a fixing element 6 on the lateral surface of the hollow slab 1 located on the outermost side in the transverse direction, and the two ends of the transverse prestressing element 2 are respectively fixed on the fixing element 6 on one side. Referring to fig. 6, in this embodiment, the fixing member 6 uses a section steel member 61, the section steel member 61 is cast and fixed on the side of the hollow core slab 1 for the outside in advance by the embedment members 62, and then the end of the transverse prestressing member 2 is anchored to the section steel member 61 by the anchoring member 7.
Through calculation, for the common span hollow core slab 1, the transverse stress of the hollow core slab 1 is relatively small in the longitudinal direction, the tension force at each prestressed hole 13 is less than 50 tons, the tension force is relatively small, and the design and construction are relatively economical. In this embodiment, the transverse prestressing member 2 may be a carbon fiber rod, which has better durability than conventional internal bundling (post-grouting of a tension steel strand), and does not require grouting, thereby facilitating replacement and recycling of the hollow slab 1. The transverse prestressed part 2 can also be a prestressed tendon, the prestressed tendon can specifically adopt a steel tendon with outer side protection, and the installation and the pouring are also convenient.
the transverse prestress pieces 2 can be arranged inside and outside the hollow precast slabs 1 simultaneously, and an inner pipe and an outer pipe are arranged below the hollow precast slabs to further increase the transverse prestress and enhance the transverse integrity of the hollow precast slabs 1, so that an integrated layer formed by integrally casting concrete above the traditional precast slabs after being assembled can be completely eliminated, the material consumption is reduced, and the construction period is shortened. The inner transverse prestress piece 2 and the outer transverse prestress piece 2 can be used alternatively and can completely achieve the expected effect, and the site construction can be determined according to the specific use environment. The material of the transverse prestressing member 2 can be selected from carbon fiber rods or prestressing tendons, and when the transverse prestressing member is used internally and externally, the carbon fiber rods and the prestressing tendons can also be used simultaneously, for example, the carbon fiber rods are used in the prestressing holes 13 of the hollow precast slab 1, and the prestressing tendons are used outside the hollow precast slab 1.
by adopting the structure, during construction, the precast hollow slabs 1 are assembled and erected to a bridge site piece by piece, after other precast beams are adjusted to be in place, the transverse prestressed pieces 2 are tensioned, the anchor is sealed and protected, the construction of a bridge deck pavement layer 5 and other auxiliary facilities is directly carried out, and the construction time is short.
By adopting the technical scheme, compared with the traditional precast hollow slabs, T beams and small box beams, the cast-in-place wet joint and the wet joint maintenance time are saved, and the construction time is short; after the integrity of the bridge deck is strengthened through the transverse prestressed pieces 2 and the wavy cemented seams 3, the application range of the span of the prefabricated hollow slab 1 can be further enlarged, and the bridge deck has more advantages than a prefabricated small box girder and a prefabricated T girder on a bridge with the span of more than 20 m; simultaneously 1 hinge joint treatment mode of hollow core slab relatively current, the utility model discloses a disease appears even a certain hollow core slab in 1 structure of hollow core slab, only need lift bridge deck pavement layer 5, relax horizontal prestressing force spare 2 after, in the middle of the replacement certain hollow core slab 1 stretch-draw again horizontal prestressing force spare 2 can, demolish the convenience, more can be applied to temporary bridge to reuse after can demolising.
It should be noted that the above preferred embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (10)
1. a prefabricated hollow slab structure, comprising: the prefabricated hollow slab comprises prefabricated hollow slabs and transverse prestress members, wherein a first wavy surface and a second wavy surface which are mutually meshed and matched are respectively arranged on two transverse sides of each prefabricated hollow slab, a plurality of the prefabricated hollow slabs are transversely assembled, adjacent prefabricated hollow slabs form wavy cementing joints through meshing of the first wavy surface and the second wavy surface, and epoxy resin is filled in the cementing joints; the transverse prestressed pieces are transversely arranged on the assembled precast hollow plates in a pulling mode, and two ends of each transverse prestressed piece are respectively anchored on the side face of the precast hollow plate on the outermost side.
2. prefabricated hollow slab structure according to claim 1,
the transverse prestress piece is arranged in the hollow core slab.
3. Prefabricated hollow slab structure according to claim 2,
The hollow core slabs are provided with transversely through prestressed holes, the prestressed holes in the corresponding positions of the hollow core slabs are communicated linearly, and the transverse prestressed pieces penetrate through the prestressed holes communicated linearly in each group.
4. prefabricated hollow slab structure according to claim 3,
the prestressed hollow slab is characterized in that a rubber cushion block is arranged in a prestressed hole of the hollow slab, and a connecting hole matched with the transverse prestressed piece is formed in the rubber cushion block.
5. prefabricated hollow slab structure according to claim 4,
The prestressed holes are arranged on the upper side and the lower side of the hollow precast slab.
6. Prefabricated hollow slab structure according to claim 1,
the transverse prestress piece is arranged outside the hollow core slab.
7. prefabricated hollow slab structure according to claim 6,
the transverse prestress piece is transversely arranged above and/or below the hollow core slab in a pulling mode, and two ends of the transverse prestress piece are respectively fixed on the lateral surface of the hollow core slab on the outermost side in the transverse direction.
8. Prefabricated hollow slab structure according to claim 7,
And the side surface of the precast hollow slab positioned on the outermost side in the transverse direction is provided with a fixing piece, and two ends of the transverse prestress piece are respectively fixed on the fixing piece on one side.
9. Prefabricated hollow slab structure according to any of claims 1-8,
The transverse prestress piece is a carbon fiber rod or a prestress beam.
10. prefabricated hollow slab structure according to claim 1,
And a bridge deck pavement layer is laid above the hollow precast slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920212171.9U CN209760027U (en) | 2019-02-18 | 2019-02-18 | hollow core slab structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920212171.9U CN209760027U (en) | 2019-02-18 | 2019-02-18 | hollow core slab structure |
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| Publication Number | Publication Date |
|---|---|
| CN209760027U true CN209760027U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920212171.9U Expired - Fee Related CN209760027U (en) | 2019-02-18 | 2019-02-18 | hollow core slab structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115478468A (en) * | 2022-11-03 | 2022-12-16 | 石家庄铁道大学 | Assembled reinforced concrete T-shaped beam bridge |
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2019
- 2019-02-18 CN CN201920212171.9U patent/CN209760027U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115478468A (en) * | 2022-11-03 | 2022-12-16 | 石家庄铁道大学 | Assembled reinforced concrete T-shaped beam bridge |
| CN115478468B (en) * | 2022-11-03 | 2024-01-19 | 石家庄铁道大学 | Assembled reinforced concrete T-shaped beam bridge |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 Termination date: 20210218 |