Shear reinforcement device for steel plate of hinge joint in existing hollow slab beam bridge and construction method

Abstract

The present application relates to a hollow slab beam bridge plate hinge joint steel plate shear reinforcement device and construction method, including a beam bridge composed of several hollow slabs, hinge joints are set between adjacent hollow slabs and reinforcing steel plates are inserted in the hinge joints, the reinforcing steel plates are composed of channel steel and steel plates, the channel steel extends longitudinally and horizontally and the steel plates are vertically fixed to the lower end of the channel steel to be inserted into the hinge joints, the reinforcing steel plates are fixed to the filling and caulking material between the transversely adjacent hollow slabs, and the reinforcing steel plates are fixed to the continuous cast-in-place section between the longitudinally adjacent hollow steel plates; the present application has reasonable structure, good mechanical properties, fully utilizes the space of the hinge joints between the hollow slabs and the pavement layer to add steel plates and channel steel, thereby improving the shear and bending carrying capacity of the hollow slab bridge structure, and improving the transverse connection capacity between the hollow slabs, and the present application has low transformation cost and simple, practical and convenient construction method in the reinforcement process of the old bridge.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of middle plate hinge joint steel plate shear reinforcement device and construction method in existing hollow slab beam bridge. BACKGROUND

[0002] Concrete hollow slab has the advantages of convenient construction, mature technology, etc., is suitable for small and medium span bridge, it is widely used in highway bridge construction, for the hollow slab of insufficient bearing capacity, if directly demolish reconstruction, cost is larger, and reconstruction period is also longer, using appropriate reinforcement technology to reinforce it, in addition to avoid cost too large, it can also guarantee its normal use within the design service life.To solve the above problems, a better method is to use hinge joint space to insert steel plate to reinforce hollow plate against bending and shear.Application of shear reinforcement in middle plate of hollow slab beam bridge will bring better economic benefit and reinforcement effect. SUMMARY

[0003] In view of the deficiencies of the prior art, the technical problem to be solved by the present application is to provide a middle plate hinge joint steel plate shear reinforcement device and construction method in existing hollow slab beam bridge, which can effectively improve the shear and bending bearing capacity of the hollow slab bridge structure, and improve the transverse connection capacity between the hollow slabs, and the modification cost is low, and the construction method is simple, practical and useful.

[0004] To solve the above technical problems, the technical scheme of the present application is: a middle plate hinge joint steel plate shear reinforcement device and construction method in existing hollow slab beam bridge, comprising a beam bridge composed of a plurality of hollow slabs, hinge joints are provided between adjacent hollow slabs, and reinforcing steel plates are inserted in the hinge joints, the reinforcing steel plates are composed of a channel steel and a steel plate, the channel steel extends longitudinally and horizontally, and the steel plate is vertically fixed to the lower end of the channel steel to be inserted into the hinge joint, the reinforcing steel plates are fixed to the filling and caulking material between the transversely adjacent hollow slabs, and the reinforcing steel plates are fixed to the continuous cast-in-place section between the longitudinally adjacent hollow steel slabs.

[0005] Further, the bottom of the longitudinal both ends of the channel steel is fixed with a steel plate to be inserted into the hinge joint of the longitudinally adjacent hollow slab.

[0006] Further, a plurality of round holes are provided on the wing plates on both sides of the channel steel along the length direction, and the round holes on the wing plates on both sides are one-to-one corresponding to arrange the paving layer reinforcement.

[0007] Further, a trapezoidal hinge joint steel beam is horizontally arranged in the hinge joint, the hinge joint steel beam is composed of horizontal glue joint reinforcement and two waist steels, the other end of the waist steel is fixed to the hollow slab, and a plurality of groups of hinge joint steel beams are arranged along the longitudinal direction and supported on the lower end of the steel plate.

[0008] Further, the length of the steel plate inserted into the hinge joint is twice the height of the hollow slab beam, and the thickness is greater than or equal to 8mm.

[0009] Further, the longitudinal length of the channel steel is the sum of the longitudinal length of the continuous cast-in-place section and four times the height of the hollow slab beam, and the height of the channel steel needs to meet the requirement that the transverse reinforcement of the pavement reinforcement mesh passes through and bears force together with the pavement.

[0010] The working method of the shear-resistant reinforcing device of the slab hinge steel plate in the existing hollow slab beam bridge is performed according to the following steps:

[0011] S1: The original pavement and hinge joint of the bridge deck are cleaned, and the steel plate and channel steel are processed and welded according to the design size and requirements in the factory;

[0012] S2: After the steel plate and channel steel are processed and welded according to the design size and requirements in the factory, the steel plate is inserted into the hinge joint as a whole and fixed to a specific position supported by the hinge joint steel beam;

[0013] S3: The gap between the hinge joint and the reinforcing steel plate is filled with a caulking material;

[0014] S4: The pavement reinforcement is inserted into the round holes on both sides of the channel steel to ensure the transverse stability of the bridge as a whole;

[0015] S5: The pavement and other pavement structures of the bridge deck are restored, and the overall strengthening of the bridge is completed.

[0016] Compared with the prior art, the present application has the following beneficial effects: The present application can be reinforced without changing the stress characteristics of the bridge, thereby minimizing the reinforcement cost and risk. The present application can effectively improve the shear-resistant and bending-resistant carrying capacity of the hollow slab bridge structure and the transverse connecting capacity between the hollow slabs, and has low modification cost and simple and practical construction method. The present application has simple structure, short construction and maintenance time, short overall construction period, and good reinforcement economy.

[0017] The present application will be further described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The figure is a structural schematic diagram of an embodiment of the present application;

[0019] Fig. 2 The figure is a schematic diagram of the connection between two longitudinally adjacent hollow slabs in an embodiment of the present application;

[0020] Fig. 3 The figure is a perspective view of an embodiment of the present application.

[0021] In the figure: 1-hollow slab, 2-beam bridge, 3-hinge joint, 4-reinforcing steel plate, 5-channel steel, 6-steel plate, 7-caulking material, 8-continuous cast-in-place section, 9-round hole, 10-hinge joint steel beam, 11-rubber joint reinforcement, 12-waist reinforcement, 13-pavement reinforcement. DETAILED DESCRIPTION

[0022] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description.

[0023] like Figs. 1-3 As shown, there is an existing hollow slab beam bridge mid-plate hinged joint steel plate shear reinforcement device, including a beam bridge 2 composed of a plurality of hollow slabs 1, hinged joints 3 are opened between adjacent hollow slabs and reinforcing steel plates 4 are inserted into the hinged joints, the reinforcing steel plates are composed of U-shaped channel steels 5 and steel plates 6, the channel steels extend longitudinally and horizontally and the steel plates are vertically fixed to the lower ends of the channel steels to be inserted into the hinged joints, the hollow slabs adjacent to each other in the transverse direction are fixed to the reinforcing steel plates by filling the grouting material 7, and the hollow steel plates adjacent to each other in the longitudinal direction are fixed to the reinforcing steel plates by continuous cast-in-situ sections 8.

[0024] In an embodiment of the present invention, steel plates are symmetrically fixed to the bottoms of both longitudinal ends of the channel steel to be inserted into the hinged joints of two longitudinally adjacent hollow plates.

[0025] In the embodiment of the present invention, the wing plates on both sides of the channel steel are provided with a plurality of circular holes 9 spaced apart along the length direction thereof, and the circular holes on the wing plates on both sides correspond one to one to arrange the pavement layer steel bars 13 .

[0026] In the embodiment of the present invention, a trapezoidal hinged joint steel beam 10 is horizontally installed in the hinged joint. The hinged joint steel beam is composed of a horizontal glued joint steel bar 11 and two waist steel bars 12. The other ends of the waist steel bars are fixedly connected to the hollow slab. The hinged joint steel beam is arranged in multiple groups at intervals along the longitudinal direction and supported at the lower end of the steel plate.

[0027] In the embodiment of the present invention, the length of the steel plate inserted into the hinged joint is twice the height of the hollow slab beam, and the thickness is greater than or equal to 8 mm.

[0028] In an embodiment of the present invention, the longitudinal length of the channel steel is the sum of the longitudinal length of the continuous cast-in-place section and four times the height of the hollow slab beam. The height of the channel steel must allow the transverse steel bars of the pavement layer steel mesh to pass through and bear the force together with the pavement layer. The transverse width of the channel steel is greater than the opening width at the top of the hinged joint.

[0029] The construction method of the shear reinforcement device for the hinged joint steel plate in the middle plate of the existing hollow slab beam bridge is carried out in the following steps:

[0030] S1: Clean the original pavement layer and hinge joints of the bridge deck, and process and weld the steel plates and channel steels in the factory according to the design dimensions and requirements;

[0031] S2: After the steel plate and channel steel are processed and welded according to the design dimensions and requirements, the steel plate is inserted into the hinged joint as a whole and fixed to a specific position supported by the hinged joint steel beam installed inside.

[0032] S3: Fill the gap between the hinge joint and the reinforcing steel plate with a sealant;

[0033] S4: Insert the paving layer steel bars in the round holes on both sides of the channel steel to ensure the lateral stability of the bridge as a whole;

[0034] S5: Restore the bridge deck pavement and other pavement structures to complete the reinforcement of the bridge as a whole.

[0035] The scale test research shows that the shear bearing capacity of the hinge joint steel plate reinforced beam is obviously better than that of the comparative beam, the shear performance of the reinforced beam body is greatly improved, and the emergence and development of cracks are effectively inhibited, the cracking load is increased by 46.2%, and the ultimate load is increased by 42.6%.

[0036] The present application is not limited to the above best embodiment, and anyone can derive other various forms of the hinge joint steel plate shear reinforcement device and construction method for the existing hollow slab beam bridge under the inspiration of the present application. Any equivalent changes and modifications made within the scope of the patent application of the present application shall be within the scope of the present application.

Claims

1. A shear reinforcement device for the hinged joint steel plate in the middle plate of an existing hollow slab girder bridge, characterized by: A beam bridge is composed of a plurality of hollow slabs, wherein hinged joints are provided between adjacent hollow slabs and reinforced steel plates are inserted into the hinged joints. The reinforced steel plates are composed of channel steels and steel plates. The channel steels extend horizontally and the steel plates are vertically fixed to the lower ends of the channel steels so as to be inserted into the hinged joints. Laterally adjacent hollow slabs are fixedly connected to the reinforced steel plates by filling the joints with grouting material, and longitudinally adjacent hollow slabs are fixedly connected to the reinforced steel plates by continuous cast-in-place sections. The bottoms of both longitudinal ends of the channel steel are fixed with steel plates to be inserted into the hinged joints of the longitudinally adjacent hollow plates; The flanges on both sides of the channel steel are provided with a plurality of circular holes spaced apart along the length direction thereof, and the circular holes on the flanges on both sides correspond to each other one by one for arranging the pavement layer reinforcement bars; Trapezoidal hinged joint steel beams are horizontally arranged in the hinged joints. The hinged joint steel beams are composed of horizontal hinged joint steel bars and two waist steel bars. The other ends of the waist steel bars are fixed to the hollow slabs. Multiple groups of hinged joint steel beams are arranged at intervals along the longitudinal direction and supported at the lower end of the steel plate.

2. The shear reinforcement device for the hinged joint steel plate in the middle plate of an existing hollow slab girder bridge according to claim 1 is characterized in that: The length of the steel plate inserted into the hinge joint is twice the height of the hollow slab beam and the thickness is greater than or equal to 8mm.

3. The shear reinforcement device for the hinged joint steel plate in the middle plate of an existing hollow slab girder bridge according to claim 1 is characterized in that: The longitudinal length of the channel steel is the sum of the longitudinal length of the continuous cast-in-place section and four times the height of the hollow slab beam. The height of the channel steel is higher than the pavement layer steel bars and the steel bars therein pass through and bear the force together with the pavement layer steel bars. The transverse width of the channel steel is greater than the opening width at the top of the hinged joint.

4. A construction method for a shear reinforcement device for a hinged joint steel plate in an existing hollow slab girder bridge, characterized in that: The shear reinforcement device for the hinged joint steel plate in the existing hollow slab girder bridge according to any one of claims 1 to 3 is used and the following steps are performed: S1: Clean the original pavement layer and hinge joints of the bridge deck, and process and weld the steel plates and channel steels in the factory according to the design dimensions and requirements; S2: After the steel plate and channel steel are processed and welded according to the design dimensions and requirements, the steel plate is inserted into the hinged joint as a whole and fixed to a specific position supported by the hinged joint steel beam; S3: Filling the gap between the hinged joint and the reinforced steel plate with caulking material; S4: Insert the pavement reinforcement into the circular holes on both sides of the channel steel to ensure the overall lateral stability of the bridge; S5: Restore the bridge deck pavement and other road structures to complete the overall reinforcement of the bridge.

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