CN112726433A - UHPC transverse clapboard device for prefabricating and assembling concrete small box girder and reinforcing method thereof - Google Patents

UHPC transverse clapboard device for prefabricating and assembling concrete small box girder and reinforcing method thereof Download PDF

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Publication number
CN112726433A
CN112726433A CN202110004589.2A CN202110004589A CN112726433A CN 112726433 A CN112726433 A CN 112726433A CN 202110004589 A CN202110004589 A CN 202110004589A CN 112726433 A CN112726433 A CN 112726433A
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China
Prior art keywords
uhpc
box girder
small box
prefabricating
adhesive
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CN202110004589.2A
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Chinese (zh)
Inventor
程坤
杜引光
孙沪
吴强强
刘漳
黄考取
凌之涵
许文煜
任智勤
黄岳斌
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Zhejiang Communications Construction Group Co Ltd
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Zhejiang Communications Construction Group Co Ltd
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Priority to CN202110004589.2A priority Critical patent/CN112726433A/en
Publication of CN112726433A publication Critical patent/CN112726433A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
    • E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention relates to a device for prefabricating and assembling a UHPC transverse clapboard on a small concrete box girder and a reinforcing method thereof, wherein the device comprises the UHPC transverse clapboard assembled on the inner side of the small box girder; the two sides of the UHPC transverse partition plate are provided with flange plates, the outer surfaces of the flange plates are reserved with a plurality of bolt reserved holes, and correspondingly, bolts corresponding to the bolt reserved holes are pre-embedded in the small box girder and inserted into the bolt reserved holes for attaching the flange plates to the inner side of the small box girder; the invention discloses a method for reinforcing a UHPC transverse clapboard for prefabricating and assembling a small concrete box girder, and aims to fully exert the advantages of UHPC materials and meet the requirements of transverse connection reinforcement of the small box girder and quickly and conveniently finish reinforcement construction.

Description

UHPC transverse clapboard device for prefabricating and assembling concrete small box girder and reinforcing method thereof
Technical Field
The invention belongs to the technical field of bridge maintenance and reinforcement devices, and particularly relates to a UHPC transverse clapboard device for prefabricating and assembling a small concrete box girder and a reinforcement method thereof.
Background
The concrete box girder bridge is widely applied to small and medium-span bridges due to the advantages of large torsional rigidity, low beam height, definite structural stress and the like. The transverse rigidity of the small box girder bridge is insufficient due to the influences of the previous design experience constraints, vehicle overload, the small box girder support seat is empty and the like, so that the overall stress performance of the bridge is reduced, and the structure safety is influenced. The transverse connection reinforcement of the small box girder can select the modes of adding section steel between the girders and pouring concrete transverse connection between the girders, but the reinforcement modes have certain problems, for example, the adding section steel between the girders has limited reinforcement effect and often has the problem of steel plate corrosion in the later period, and the pouring concrete transverse connection reinforcement site construction is more complicated and the like.
With the development and continuous popularization of ultra-high performance concrete (UHPC), due to its good tensile property and high durability, UHPC has been gradually applied to bridge repair and reinforcement, including orthotropic steel bridge deck pavement treatment, hollow slab bridge hinge joint reinforcement, and the like. However, because UHPC construction is harsh to the curing conditions, the expected reinforcing effect is often difficult to achieve by directly increasing the transverse connection of the bridge through cast-in-situ UHPC concrete.
In view of the above technical problems, improvements are needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the UHPC transverse clapboard device for the precast assembly of the small concrete box girder and the reinforcing method thereof, wherein the UHPC transverse clapboard device has a simple structure and ingenious design, ensures the reinforcing effect and improves the reinforcing efficiency.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a kind of concrete small box girder prefabrication assembles the UHPC diaphragm plate device, including assembling in the UHPC diaphragm plate of the small box girder inboard; and the two sides of the UHPC transverse partition plate are provided with flange plates, the outer surfaces of the flange plates are reserved with a plurality of bolt reserved holes, and correspondingly, bolts corresponding to the bolt reserved holes are pre-embedded in the small box girder and inserted into the bolt reserved holes for attaching the flange plates to the inner side of the small box girder.
As a preferred scheme of the invention, the bottom of the small box girder and the bottom of the UHPC diaphragm are on the same horizontal plane.
In a preferred embodiment of the present invention, the box girder and the flange plate are bonded by an adhesive.
As a preferable scheme of the present invention, four bolt preformed holes are provided and symmetrically arranged on two sides of the flange plate.
In a preferred embodiment of the present invention, a rubber packing is attached to an edge of the flange plate, and the rubber packing is attached to a periphery of the flange plate.
As a preferred scheme of the present invention, the bottom of the flange plate is provided with a glue injection nozzle, and the top of the flange plate is provided with a glue outlet nozzle.
A method for reinforcing a UHPC transverse clapboard device for prefabricating and assembling a small concrete box girder is characterized by comprising the following steps of: the method comprises the following steps:
prefabricating a UHPC transverse clapboard in a factory according to the transverse distance and the web height of the small box girder; two sides of the UHPC transverse clapboard are provided with flange plates;
step two, lofting the position of the UHPC transverse clapboard to be installed in the small box girder, and roughening the surface;
step three, installing a UHPC diaphragm plate on site, pre-screwing bolts, ensuring that the bolts tightly prop against a web plate of the small box girder, and applying a certain reverse pre-pressure to the UHPC diaphragm plate;
step four, installing a glue injection nozzle and a glue outlet nozzle, sealing the periphery of a flange plate of the UHPC diaphragm plate by adopting a sealing glue to form a closed space, and carrying out closure inspection;
injecting the adhesive colloid from the adhesive injection nozzle in a mode from bottom to top until the adhesive liquid continuously flows out of the adhesive outlet nozzle, and continuously maintaining the pressure for a certain time after the adhesive outlet nozzle is closed to complete the adhesive injection;
and step six, after the adhesive colloid is solidified, loosening the bolts and applying certain pre-pressure to the adhesive colloid to complete transverse connection and reinforcement of the small box girder.
The invention has the beneficial effects that:
1. the invention relates to a method for reinforcing a UHPC transverse clapboard for prefabricating and assembling a small concrete box girder, aiming at not only giving full play to the advantages of UHPC materials and meeting the requirement of transverse connection reinforcement of the small box girder, but also quickly and conveniently completing reinforcement construction;
2. the invention has simple structure and ingenious design, and adopts the diaphragm plate prefabricated by UHPC material to reinforce the small box girder from the perspective of assembly, thereby not only fully utilizing the good tensile property and high durability of the UHPC, but also avoiding the on-site pouring and the maintenance of concrete, and in addition, applying a certain prestress on the reinforcing bonding layer by the bolt pre-jacking mode, and improving the reliability of the connection between the prefabricated UHPC diaphragm plate and the small box girder.
Drawings
FIG. 1 is a schematic cross-sectional view illustrating reinforcement of a UHPC diaphragm plate in a precast assembly of a concrete box girder according to an embodiment of the invention;
FIG. 2 is a cross-sectional view of an embodiment A-A of the present invention;
FIG. 3 is a schematic view of a UHPC diaphragm according to an embodiment of the present invention;
reference numbers in the figures: the small box girder comprises a small box girder 1, a UHPC precast slab 2, a flange plate 3, adhesive colloid 4, bolts 5, an adhesive injection nozzle 6, an adhesive discharge nozzle 7, sealing colloid 8 and bolt preformed holes 9.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in fig. 1 to 3, the apparatus for prefabricating and assembling a UHPC diaphragm plate for a small concrete box girder provided by this embodiment includes a UHPC diaphragm plate 2 assembled inside a small box girder 1; in the prior art, a small box girder 1 is not provided with a middle diaphragm plate, and the transverse integrity of the small box girder 1 can be improved after the UHPC diaphragm plate 2 is added for reinforcement; both sides of the UHPC diaphragm plate 2 are provided with flange plates 3, and the UHPC diaphragm plate 2 in the embodiment adopts factory prefabrication and high-temperature steam curing for a truss structure poured by UHPC materials. In order to increase the bonding area between the UHPC diaphragm 2 and the small box girder 1, flange plates 3 are added on two sides of the UHPC diaphragm 2, and the surfaces of the flange plates 3, which are in contact with the small box girder 1, are subjected to rough treatment; the invention discloses a method for reinforcing a UHPC transverse clapboard for prefabricating and assembling a small concrete box girder, and aims to realize the purposes of fully exerting the advantages of UHPC materials and meeting the requirements of transverse connection reinforcement of the small box girder and simultaneously quickly and conveniently completing reinforcement construction.
In order to facilitate installation, a plurality of bolt preformed holes 9 are reserved on the outer surface of the flange plate 3, correspondingly, bolts 5 corresponding to the bolt preformed holes 9 are pre-embedded in the small box girder 1, and the bolts 5 are inserted into the bolt preformed holes 9 and used for attaching the flange plate 3 to the inner side of the small box girder 1; specifically, four bolt preformed holes 9 are arranged and symmetrically distributed on two sides of the flange plate 3; the bolts 5 are pre-embedded members when the UHPC transverse partition plate 2 is prefabricated, and have the functions that after the UHPC transverse partition plate 2 is installed and positioned, the bolts 5 tightly prop the small box girder 1 and then fix the UHPC transverse partition plate 2, and after the adhesive colloid 4 is poured, the bolts 5 are released and then certain pre-pressure is applied to the adhesive colloid.
The bottom of the small box girder 1 and the bottom of the UHPC diaphragm plate 2 are on the same horizontal plane, and the small box girder 1 and the flange plate 3 are bonded through the adhesive 4. Wherein, the adhesive colloid 4 should adopt A-grade adhesive meeting the specification and design requirements.
The edge of the flange plate 3 is provided with a rubber sealing ring 8, and the rubber sealing ring 8 is attached to the periphery of the flange plate 3; the rubber sealing ring 8 is attached to the periphery of the flange plate 3; the edge sealing is used when the adhesive colloid 4 is injected into the flange plate 3.
The bottom of the flange plate 3 is provided with a glue injection nozzle 6, and the top of the flange plate 3 is provided with a glue outlet nozzle 7; and after the glue injection nozzle 6 and the glue outlet nozzle 7 are installed, sealing the periphery of the UHPC diaphragm plate flange plate 3.
A method for reinforcing a UHPC transverse clapboard device for prefabricating and assembling a small concrete box girder comprises the following steps:
firstly, prefabricating a UHPC transverse clapboard 2 in a factory according to the transverse distance and the web height of a small box girder 1; two sides of the UHPC diaphragm plate 2 are provided with flange plates 3;
step two, lofting the position of the UHPC transverse clapboard 2 to be installed in the small box girder 1, and roughening the surface;
step three, installing the UHPC diaphragm plate 2 on site, pre-screwing the bolt 5, ensuring that the bolt 5 tightly props against the web plate of the small box girder 1, and applying a certain reverse pre-pressure to the UHPC diaphragm plate 2;
step four, installing a glue injection nozzle 6 and a glue outlet nozzle 7, sealing the periphery of the flange plate 3 of the UHPC transverse clapboard 2 by adopting a sealing colloid 8 to form a closed space, and carrying out closure inspection;
step five, injecting the adhesive 4 from the adhesive injection nozzle in a mode from bottom to top until the adhesive liquid continuously flows out of the adhesive outlet nozzle 7, and continuously maintaining the pressure for a certain time after the adhesive outlet nozzle 7 is closed to complete the adhesive injection;
and step six, after the adhesive colloid 4 is solidified and the bolt 5 is loosened, applying certain pre-pressure to the adhesive colloid 4, and finishing transverse connection reinforcement of the small box girder 1.
The invention has simple structure and ingenious design, and adopts the diaphragm plate prefabricated by UHPC material to reinforce the small box girder from the perspective of assembly, thereby not only fully utilizing the good tensile property and high durability of the UHPC, but also avoiding the on-site pouring and the maintenance of concrete, and in addition, applying a certain prestress on the reinforcing bonding layer by the bolt pre-jacking mode, and improving the reliability of the connection between the prefabricated UHPC diaphragm plate and the small box girder.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more here: the small box girder 1, the UHPC precast slab 2, the flange slab 3, the adhesive 4, the bolt 5, the glue injection nozzle 6, the glue outlet nozzle 7, the sealing adhesive 8, the bolt preformed hole 9 and other terms, but the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (7)

1. The utility model provides a prefabricated assembly UHPC cross slab device of concrete box girder which characterized in that: comprises a UHPC diaphragm plate (2) which is assembled at the inner side of a small box girder (1); the two sides of the UHPC transverse partition plate (2) are provided with flange plates (3), the outer surfaces of the flange plates (3) are reserved with a plurality of bolt reserved holes (9), correspondingly, bolts (5) corresponding to the bolt reserved holes (9) are pre-embedded in the small box girder (1), and the bolts (5) are inserted into the bolt reserved holes (9) and used for attaching the flange plates (3) to the inner side of the small box girder (1).
2. The device for prefabricating and assembling the UHPC transverse clapboard of the concrete small box girder according to the claim 1, is characterized in that: the bottom of the small box girder (1) and the bottom of the UHPC diaphragm plate (2) are on the same horizontal plane.
3. The device for prefabricating and assembling the UHPC transverse clapboard of the concrete small box girder according to the claim 2, is characterized in that: the small box girder (1) and the flange plate (3) are bonded through the adhesive colloid (4).
4. The device for prefabricating and assembling the UHPC transverse clapboard of the concrete small box girder according to the claim 1, is characterized in that: the number of the bolt preformed holes (9) is four, and the bolt preformed holes are symmetrically distributed on two sides of the flange plate (3).
5. The device for prefabricating and assembling the UHPC transverse clapboard of the concrete small box girder according to the claim 4, is characterized in that: rubber seal (8) are installed at the edge of flange board (3), and rubber seal (8) laminate in the periphery of flange board (3).
6. The device for prefabricating and assembling the UHPC transverse clapboard of the concrete small box girder according to the claim 5, is characterized in that: glue injection nozzles (6) are installed at the bottoms of the flange plates (3), and glue outlet nozzles (7) are installed at the tops of the flange plates (3).
7. A method for reinforcing a prefabricated UHPC diaphragm assembly of concrete box girders according to any of claims 1-6, characterized in that: the method comprises the following steps:
firstly, prefabricating a UHPC diaphragm plate (2) in a factory according to the transverse distance and the web height of a small box girder (1); two sides of the UHPC diaphragm plate (2) are provided with flange plates (3);
secondly, lofting the position of the UHPC transverse clapboard (2) to be installed in the small box girder (1), and roughening the surface;
step three, installing the UHPC diaphragm plate (2) on site, pre-screwing the bolts (5), ensuring that the bolts (5) tightly support the web plate of the small box girder (1), and applying a certain reverse pre-pressure to the UHPC diaphragm plate (2);
step four, installing a glue injection nozzle (6) and a glue outlet nozzle (7), sealing the periphery of the flange plate (3) of the UHPC transverse clapboard (2) by adopting a sealing colloid (8) to form a closed space, and carrying out closure inspection;
step five, injecting the adhesive colloid (4) from the adhesive injection nozzle in a mode from bottom to top until the adhesive liquid continuously flows out of the adhesive outlet nozzle (7), and continuously maintaining the pressure for a certain time after the adhesive outlet nozzle (7) is closed to complete the adhesive injection;
and sixthly, after the adhesive colloid (4) is solidified, loosening the bolt (5) and applying certain pre-pressure to the adhesive colloid (4) to complete transverse connection reinforcement of the small box girder (1).
CN202110004589.2A 2021-01-04 2021-01-04 UHPC transverse clapboard device for prefabricating and assembling concrete small box girder and reinforcing method thereof Pending CN112726433A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110004589.2A CN112726433A (en) 2021-01-04 2021-01-04 UHPC transverse clapboard device for prefabricating and assembling concrete small box girder and reinforcing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110004589.2A CN112726433A (en) 2021-01-04 2021-01-04 UHPC transverse clapboard device for prefabricating and assembling concrete small box girder and reinforcing method thereof

Publications (1)

Publication Number Publication Date
CN112726433A true CN112726433A (en) 2021-04-30

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Application Number Title Priority Date Filing Date
CN202110004589.2A Pending CN112726433A (en) 2021-01-04 2021-01-04 UHPC transverse clapboard device for prefabricating and assembling concrete small box girder and reinforcing method thereof

Country Status (1)

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CN (1) CN112726433A (en)

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