CN108951418B - Hinge joint structure of prefabricated hollow slab beam and construction method thereof - Google Patents

Hinge joint structure of prefabricated hollow slab beam and construction method thereof Download PDF

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Publication number
CN108951418B
CN108951418B CN201810897122.3A CN201810897122A CN108951418B CN 108951418 B CN108951418 B CN 108951418B CN 201810897122 A CN201810897122 A CN 201810897122A CN 108951418 B CN108951418 B CN 108951418B
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prefabricated hollow
hinge joint
steel bar
hollow slab
slab beam
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CN108951418A (en
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高金
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Shanghai Investigation Design and Research Institute Co Ltd SIDRI
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Shanghai Investigation Design and Research Institute Co Ltd SIDRI
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/12Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E01D19/125Grating or flooring for bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/60Planning or developing urban green infrastructure

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  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention provides a hinge joint structure of a prefabricated hollow plate girder, which comprises a first prefabricated hollow plate girder and a second prefabricated hollow plate girder, wherein the first prefabricated hollow plate girder and the second prefabricated hollow plate girder are connected through a hinge joint; a first bending steel bar is arranged in the first prefabricated hollow slab beam, and extends out from the lower edge of the first prefabricated hollow slab beam to enter a hinge joint for upward bending; the second prefabricated hollow slab beam is internally provided with a second bending steel bar, the second bending steel bar extends out of the lower edge of the second prefabricated hollow slab beam and enters the hinge joint to be bent upwards, and the first bending steel bar and the second bending steel bar are positioned in the hinge joint to form a closed stirrup. The invention also provides a construction method of the hinge joint structure of the prefabricated hollow slab beam. The structure is simple, the construction is convenient, the manufacturing cost is low, the stirrup is formed by configuring the first bending steel bar and the second bending steel bar, the reliability of transverse connection between the hinge joint and the hollow slab beam is improved, and the whole shearing bearing capacity of the slab beam is increased.

Description

Hinge joint structure of prefabricated hollow slab beam and construction method thereof
Technical Field
The invention relates to the technical field of bridge structures, in particular to a hinge joint structure of a prefabricated hollow slab beam and a construction method thereof.
Background
The prefabricated simply supported hollow slab bridge has simple structure and convenient construction, and can be widely applied to small-span bridges. The assembled hollow slab blocks are transversely connected by adopting hinge joints, and under the action of external load, each hollow slab block participates in stress together. The connection of hinge joints is the key of transverse force transmission of plate girders, actual investigation on an established assembled concrete simple support plate bridge finds that the phenomenon of concrete hinge joint damage is common, such as cracking, breakage, peeling of hinge joint concrete, fracture of hinge joint constructional steel bars and the like, and the damage of the hinge joints increases the load born by part of the plate girders, reduces the integrity of the assembled simple support plate bridge and seriously threatens the safety of the plate girder bridge.
With the increase of traffic, the concentrated force of traffic lane load specified by specifications is increased, and the shearing resistance of the conventional plate girder structure is insufficient, so that certain measures are required to improve the shearing resistance of the structure.
The invention discloses a concrete hollow slab bridge hinge joint reinforcing steel bar structure in the Chinese patent specification of application number 201610212145.7, mainly aiming at providing a new hinge joint reinforcing steel bar form of an assembled concrete slab bridge, solving the problem of insufficient anchoring length of a hinge joint tension reinforcing steel bar in a hollow slab and a hinge joint through a new reinforcing steel bar pin joint structure, improving the tensile capacity of the hinge joint, providing the concrete hollow slab bridge hinge joint reinforcing steel bar structure, comprising a hollow slab body and hollow slab stirrups arranged in the hollow slab body, a plurality of U-shaped hinge joint pin joint reinforcing steel bars are arranged between adjacent hollow slab bodies, a plurality of closed annular hinge joint tensile reinforcing steel bars are arranged between the hinge joint pin joint reinforcing steel bars and the hollow slab stirrups at two sides of the hinge joint pin joint reinforcing steel bars, and hollow slab longitudinal ribs and hinge joint longitudinal reinforcing steel bars are respectively arranged in the hollow slab stirrups and between the hinge joint pin joint reinforcing steel bars. The hinge joint reinforcing steel bar structure of the concrete hollow slab bridge is characterized in that two hollow slabs are connected, but the hinge joint reinforcing steel bar structure is complex, and the construction is inconvenient.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a hinge joint structure of a prefabricated hollow slab beam, so as to overcome the above-mentioned drawbacks of the prior art.
In order to achieve the above object, the present invention provides a hinge joint structure of a prefabricated hollow slab beam, including a first prefabricated hollow slab beam and a second prefabricated hollow slab beam, wherein the first prefabricated hollow slab beam and the second prefabricated hollow slab beam are connected through a hinge joint; a first bending steel bar is arranged in the first prefabricated hollow plate beam, extends out of the lower edge of the first prefabricated hollow plate beam into the hinge joint, and bends upwards at a position close to the second prefabricated hollow plate beam; the second bending steel bars are arranged in the second prefabricated hollow plate beams, extend out of the lower edges of the second prefabricated hollow plate beams into the hinge joints, and are bent upwards at positions close to the first prefabricated hollow plate beams, and the first bending steel bars and the second bending steel bars form closed stirrups at the positions located in the hinge joints.
Preferably, the upper edge of the hinge joint is provided with a plurality of first longitudinal steel bars, the lower edge of the hinge joint is provided with a plurality of second longitudinal steel bars, and the two side edges of the hinge joint are respectively provided with a plurality of third longitudinal steel bars.
Preferably, the plurality of third longitudinal steel bars close to the side of the second prefabricated hollow slab beam are respectively bound with the first bending steel bars through binding wires, and the plurality of third longitudinal steel bars close to the side of the first prefabricated hollow slab beam are respectively bound with the second bending steel bars through binding wires.
Preferably, the end part of the first bending steel bar is provided with a first hook, the end part of the second bending steel bar is provided with a second hook, and the first hook and the second hook are connected on the same first longitudinal steel bar.
Preferably, a first extending reinforcing steel bar is arranged in the first prefabricated hollow slab beam, the first extending reinforcing steel bar extends from the upper edge of the first prefabricated hollow slab beam into the hinge joint, passes through the first longitudinal reinforcing steel bar, and enters the upper part of the second prefabricated hollow slab beam after being bent; the second stretching reinforcing steel bars are arranged in the second prefabricated hollow plate beams, extend out of the upper edges of the second prefabricated hollow plate beams into hinge joints, pass through the lower parts of the first longitudinal reinforcing steel bars, and enter the upper parts of the first prefabricated hollow plate beams after being bent.
Preferably, a pavement reinforcing steel bar net is arranged above the first prefabricated hollow plate beam and the second prefabricated hollow plate beam, and the first extension reinforcing steel bars and the second extension reinforcing steel bars are respectively bound with the corresponding pavement reinforcing steel bar net.
The second technical problem to be solved by the invention is to provide a construction method of a hinge joint structure of a prefabricated hollow slab beam, which comprises the following steps:
s1, prefabricating a first prefabricated hollow slab beam and a second prefabricated hollow slab beam;
s2, bending and forming the first bending steel bar, the second bending steel bar, the first extending steel bar and the second extending steel bar according to the designed positions;
s3, hoisting the first prefabricated hollow plate beam and the second prefabricated hollow plate beam to corresponding positions;
s4, mounting the template below the hinge joint;
s5, respectively erecting a first longitudinal steel bar, a second longitudinal steel bar and a third longitudinal steel bar at corresponding positions in the hinge joint;
s6, binding the first bending steel bar and the second bending steel bar to form a stirrup of a hinge joint;
s7, binding the first extension steel bars and the second extension steel bars with corresponding paving steel bar meshes respectively;
and S8, pouring concrete in the hinge joint, and pouring concrete in the paving layer above the hinge joint, the first prefabricated hollow slab beam and the second prefabricated hollow slab beam.
Preferably, in step S1, the sides of the first and second prefabricated hollow panel beams are roughened.
As described above, the hinge joint structure of the prefabricated hollow slab beam and the construction method thereof according to the present invention have the following advantages: the structure is simple, the construction is convenient, the manufacturing cost is low, the stirrup is formed by configuring the first bending steel bar and the second bending steel bar, the reliability of transverse connection between the hinge joint and the hollow slab beam is improved, and the whole shearing bearing capacity of the slab beam is increased.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of a first bent reinforcing bar.
Fig. 3 is a schematic structural view of a second bent bar.
Description of element reference numerals
1. First prefabricated hollow slab beam
11. First bending steel bar
111. First hook
12. First extending reinforcing steel bar
2. Second prefabricated hollow slab beam
21. Second bending steel bar
211. Second hook
22. Second extended reinforcing bar
3. Hinge joint
31. First longitudinal steel bar
32. Second longitudinal steel bar
33. Third longitudinal steel bar
4. Paving steel bar
5. Template
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms such as "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the invention for which the invention may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.
As shown in fig. 1 to 3, the invention provides a hinge joint structure of a prefabricated hollow slab beam, which comprises a first prefabricated hollow slab beam 1 and a second prefabricated hollow slab beam 2, wherein the first prefabricated hollow slab beam 1 and the second prefabricated hollow slab beam 2 are connected through a hinge joint 3, the first prefabricated hollow slab beam 1 and the second prefabricated hollow slab beam 2 are prefabricated reinforced concrete hollow slab beams, and are designed and produced based on standard drawings of a simple hollow slab beam bridge recommended by a bridge and culvert general design drawing or a bridge and culvert public structural drawing, and are transported to a site for hinge joint cast-in-situ after being prefabricated in a factory, and the hinge joint 3 is a reinforced concrete structure and is cast on the site. The width of which depends on the bridge width and the number of hollow plate beams.
As shown in fig. 1 to 3, a first bending steel bar 11 is disposed in the first prefabricated hollow slab beam 1, and the first bending steel bar 11 includes two parts, one part is located in the first prefabricated hollow slab beam 1 near the lower edge, and the other part is located in the hinge joint 3, that is, the first bending steel bar 11 extends from the lower edge of the first prefabricated hollow slab beam 1 into the hinge joint 3, and bends upwards near the second prefabricated hollow slab beam 2. The second bending steel bar 21 is arranged in the second prefabricated hollow slab beam 2, the second bending steel bar 21 comprises two parts, one part of the second bending steel bar 21 is positioned at the position, close to the lower edge, in the second prefabricated hollow slab beam 2, and the other part of the second bending steel bar 21 is positioned in the hinge joint 3, namely, the second bending steel bar 21 extends out of the lower edge of the second prefabricated hollow slab beam 2 into the hinge joint 3, is bent upwards at the position close to the first prefabricated hollow slab beam 1 and then extends to the position of the upper edge of the hinge joint 3, and bends towards the end part of the first bending steel bar 21 again, so that the first bending steel bar 11 and the part, located in the hinge joint 3, of the second bending steel bar 21 form a closed stirrup along the edge of the hinge joint 3, and the first bending steel bar 11 and the second bending steel bar 21 play a role in reinforcing the connection between the hinge joint and the prefabricated hollow slab beam on one hand, and on the other hand serve as a part of the stirrup of the slab bridge, and the shearing bearing capacity of the slab bridge is improved.
As shown in fig. 1, preferably, the upper edge of the hinge joint 3 is provided with a plurality of first longitudinal steel bars 31, the lower edge of the hinge joint 3 is provided with a plurality of second longitudinal steel bars 32, two side edges of the hinge joint 3 are respectively provided with a plurality of third longitudinal steel bars 33, the number of the first longitudinal steel bars 31 and the second longitudinal steel bars 32 is not less than two, and the number of the third longitudinal steel bars 33 is determined according to the construction requirement. The third longitudinal steel bars 33 close to the second prefabricated hollow slab beam 2 side are respectively bound with the first bending steel bars 11 through binding wires, the third longitudinal steel bars 33 close to the first prefabricated hollow slab beam 1 side are respectively bound with the second bending steel bars 21 through binding wires, and the first bending steel bars 11 and the second bending steel bars 21 close to the lower edge positions in the hinge joints 3 can be respectively bound with the second longitudinal steel bars 32 through binding wires, wherein the second longitudinal steel bars 32 can serve as stressed main bars.
As shown in fig. 1 to 3, preferably, the end of the first bent bar 11 is provided with a first hook 111, the end of the second bent bar 21 is provided with a second hook 211, the first hook 111 and the second hook 211 are connected to the same first longitudinal bar 31, and the first hook 111 and the second hook 211 may be 135-degree hooks, increasing the anchoring length and thus the anchoring capacity.
As shown in fig. 1 to 3, preferably, a first extending steel bar 12 is arranged in the first prefabricated hollow slab beam 1, the first extending steel bar 12 extends from the upper edge of the first prefabricated hollow slab beam 1 into the hinge joint 3, passes through from the lower part of the first longitudinal steel bar 31, and enters the upper part of the second prefabricated hollow slab beam 2 after being bent; the second extending steel bars 22 are arranged in the second prefabricated hollow plate beam 2, the second extending steel bars 22 extend from the upper edge of the second prefabricated hollow plate beam 2 into the hinge joint 3, pass through the first longitudinal steel bars 31, and enter the upper part of the first prefabricated hollow plate beam 1 after being bent. Optionally, a pavement reinforcing steel mesh is arranged above the first prefabricated hollow plate girder 1 and the second prefabricated hollow plate girder 2, and the first extension reinforcing steel bars 12 and the second extension reinforcing steel bars 22 are respectively bound with the corresponding pavement reinforcing steel mesh 4.
The invention also provides a construction method of the hinge joint structure of the prefabricated hollow slab beam, which comprises the following steps:
s1, prefabricating a first prefabricated hollow plate girder 1 and a second prefabricated hollow plate girder 2, and roughening the side surfaces of the first prefabricated hollow plate girder 1 and the second prefabricated hollow plate girder 2 so as to strengthen the bonding strength of hinge joint cast-in-place concrete and the prefabricated hollow plate girders;
s2, carrying out reinforcement design of the first bending reinforcing steel bar 11, the second bending reinforcing steel bar 21, the first extending reinforcing steel bar 12 and the second extending reinforcing steel bar 22, and bending and forming the first bending reinforcing steel bar 11, the second bending reinforcing steel bar 21, the first extending reinforcing steel bar 12 and the second extending reinforcing steel bar 22 according to design positions respectively;
s3, hanging the first prefabricated hollow plate girder 1 and the second prefabricated hollow plate girder 2 to corresponding positions through a hanging device;
s4, installing the templates 5 to corresponding positions, namely, arranging the templates 5 at the bottoms of the hinge joints 3, and respectively extending the two sides to the bottoms of the first prefabricated hollow plate girder 1 and the second prefabricated hollow plate girder 2;
s5, respectively erecting a first longitudinal steel bar 31, a second longitudinal steel bar 32 and a third longitudinal steel bar 33 at corresponding positions in the hinge joint 3;
s6, binding the first bending steel bar 11 and the second bending steel bar 21 to form stirrups of the hinge joint 3;
s7, binding the first extension steel bars 12 and the second extension steel bars 22 with the corresponding paving steel bar meshes 4 respectively;
s8, pouring concrete in the hinge joint 3, and pouring concrete in the paving layers above the hinge joint 3, the first prefabricated hollow slab beam 1 and the second prefabricated hollow slab beam 2.
In summary, the present invention effectively overcomes the disadvantages of the prior art and has high industrial utility value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (7)

1. The hinge joint structure of the prefabricated hollow plate girder is characterized by comprising a first prefabricated hollow plate girder (1) and a second prefabricated hollow plate girder (2), wherein the first prefabricated hollow plate girder (1) and the second prefabricated hollow plate girder (2) are connected through a hinge joint (3);
a first bending steel bar (11) is arranged in the first prefabricated hollow slab beam (1), and the first bending steel bar (11) extends out of the lower edge of the first prefabricated hollow slab beam (1) into the hinge joint (3) and bends upwards at a position close to the second prefabricated hollow slab beam (2); a second bending steel bar (21) is arranged in the second prefabricated hollow slab beam (2), the second bending steel bar (21) extends out of the lower edge of the second prefabricated hollow slab beam (2) into the hinge joint (3), and extends to the upper edge of the hinge joint (3) after being bent upwards at a position close to the first prefabricated hollow slab beam (1), and then bends towards the end part of the first bending steel bar (11) again, so that the first bending steel bar (11) and the part of the second bending steel bar (21) positioned in the hinge joint (3) form a closed stirrup;
the upper edge of the hinge joint (3) is provided with a plurality of first longitudinal steel bars (31); a first extending reinforcing steel bar (12) is arranged in the first prefabricated hollow slab beam (1), the first extending reinforcing steel bar (12) extends out of the upper edge of the first prefabricated hollow slab beam (1) into the hinge joint (3), passes through the lower part of the first longitudinal reinforcing steel bar (31), and enters the upper part of the second prefabricated hollow slab beam (2) after being bent; the second stretching reinforcing steel bars (22) are arranged in the second prefabricated hollow plate beams (2), the second stretching reinforcing steel bars (22) stretch out from the upper edges of the second prefabricated hollow plate beams (2) into hinge joints (3), pass through the lower parts of the first longitudinal reinforcing steel bars (31), and enter the upper parts of the first prefabricated hollow plate beams (1) after being bent.
2. The hinge joint construction of a prefabricated hollow panel beam according to claim 1, wherein: the lower edge of the hinge joint (3) is provided with a plurality of second longitudinal steel bars (32), and the edges of the two sides of the hinge joint (3) are respectively provided with a plurality of third longitudinal steel bars (33).
3. The hinge joint construction of a prefabricated hollow panel beam according to claim 2, wherein: a plurality of third longitudinal steel bars (33) close to the side of the second prefabricated hollow slab beam (2) are respectively bound with the first bending steel bars (11) through binding wires, and a plurality of third longitudinal steel bars (33) close to the side of the first prefabricated hollow slab beam (1) are respectively bound with the second bending steel bars (21) through binding wires.
4. The hinge joint construction of a prefabricated hollow panel beam according to claim 2, wherein: the end part of the first bending steel bar (11) is provided with a first hook (111), the end part of the second bending steel bar (21) is provided with a second hook (211), and the first hook (111) and the second hook (211) are connected to the same first longitudinal steel bar (31).
5. The hinge joint construction of a prefabricated hollow panel beam according to claim 1, wherein: the first prefabricated hollow slab beam (1) and the second prefabricated hollow slab beam (2) are provided with paving reinforcing steel meshes (4) above, and the first extending reinforcing steel bars (12) and the second extending reinforcing steel bars (22) are respectively bound with the corresponding paving reinforcing steel meshes (4).
6. A method of constructing the hinge joint construction of a prefabricated hollow panel beam as claimed in any one of claims 1 to 5, comprising the steps of:
s1, prefabricating a first prefabricated hollow slab beam (1) and a second prefabricated hollow slab beam (2);
s2, bending and forming the first bending steel bar (11), the second bending steel bar (21), the first extending steel bar (12) and the second extending steel bar (22) according to the designed positions;
s3, hoisting the first prefabricated hollow plate beam (1) and the second prefabricated hollow plate beam (2) to corresponding positions;
s4, mounting the template (5) to a corresponding position;
s5, respectively erecting a first longitudinal steel bar (31), a second longitudinal steel bar (32) and a third longitudinal steel bar (33) at corresponding positions in the hinge joint (3);
s6, binding the first bending steel bar (11) and the second bending steel bar (21) to form stirrups of the hinge joint (3);
s7, binding the first extension steel bars (12) and the second extension steel bars (22) with the corresponding paving steel bar meshes (4) respectively;
s8, pouring concrete in the hinge joint (3), and pouring concrete in the paving layers above the hinge joint, the first prefabricated hollow slab beam (1) and the second prefabricated hollow slab beam (2).
7. The method for constructing the hinge joint structure of the prefabricated hollow slab beam according to claim 6, wherein: in step S1, the sides of the first prefabricated hollow panel beam (1) and the second prefabricated hollow panel beam (2) are roughened.
CN201810897122.3A 2018-08-08 2018-08-08 Hinge joint structure of prefabricated hollow slab beam and construction method thereof Active CN108951418B (en)

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CN109487686A (en) * 2018-12-29 2019-03-19 武汉理工大学 A kind of unit construction bridge panel transverse joint using UHPC grouting material
CN110499700B (en) * 2019-08-30 2021-10-22 山东高速股份有限公司 Hollow slab beam bridge structure adopting ultra-high performance concrete filler and construction method
CN112681114A (en) * 2020-12-22 2021-04-20 中冶南方城市建设工程技术有限公司 Transversely prefabricated and assembled hollow slab beam and construction method thereof

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