Plate girder hinge joint structure

Abstract

The utility model discloses a plate girder hinge joint structure which is used for connecting plate girders on the upper portion of a bridge. Opposite hinge joint grooves are formed in the connected side surfaces of every two connected upper plate girders; each hinge joint groove comprises a main groove which is in the shape of a concave trapezoid; an inclined surface is arranged between the upper end of the side wall of one side, close to the upper surface of the corresponding upper plate beam, of each main groove and the upper surface of the corresponding upper plate beam; after every two connected upper plate girders are spliced, a sheet bottom film is arranged between the side walls of one sides, far away from the upper surfaces of the upper plate girders, of the two corresponding main grooves; and each thin-sheet bottom film, the corresponding two main grooves positioned on the two sides and the two inclined surfaces form a hinge joint pouring cavity. During construction, the upper plate girder is sequentially constructed, the sheet bottom film is laid, the flexible asphalt cushion layers are laid at the bottoms of all the main grooves, and UHPC high-performance concrete materials are poured into the hinge joint pouring cavities to form hinge joints. Potential diseases such as slab staggering and damage of the expansion joint are effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge technical field, especially plate beam hinge joint structure. BACKGROUND

[0002] The bridge will produce displacement between the superstructure due to load, temperature change and material shrinkage and creep, and the conventional bridge mostly uses expansion joint to adjust the displacement.

[0003] But expansion joint has many hidden troubles in the use process, such as the damage of expansion joint due to insufficient strength, the penetration of sundries into expansion joint and so on. In addition, the existence of expansion joint has a great influence on the bridge flatness, and the step and car jumping phenomenon is easy to occur in the driving process, which will reduce the durability and driving comfort of the bridge.

[0004] In order to solve the adverse factors of expansion joint to the bridge structure, a large number of researches have been made to improve the durability and corrosion resistance of expansion joint from the aspects of new materials, construction technology and maintenance method, but under such method, the bridge still has actual expansion joint, and the driving comfort cannot be guaranteed.

[0005] Therefore, researchers put forward the concept of seamless bridge, that is, the bridge with continuous superstructure and no expansion device, and such bridge mostly uses special structure and high performance materials to make the bridge not only meet the thermal expansion and cold contraction of the superstructure, but also guarantee the driving comfort.

[0006] However, most of the existing seamless bridge researches are for the bridge with the bridge span direction parallel to the road advancing direction, and there are few researches on the case that the bridge span direction is perpendicular to the road advancing direction; at the same time, the existing seamless bridge technology is mostly applied to small and medium span bridges, and there is still no good solution for large span bridges.

[0007] Therefore, in the field of bridge construction, how to replace the traditional expansion joint device, improve the driving stability, meet the temperature deformation in the longitudinal direction of the road and the normal use of the bridge, and be applied to long span bridges has become a technical problem to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0008] In view of the above defects of the prior art, the utility model provides plate beam hinge joint structure, which realizes the purpose of replacing the traditional expansion joint device, improving the driving stability, meeting the temperature deformation in the longitudinal direction of the road and the normal use of the bridge, and being applied to long span bridges.

[0009] In order to achieve the above purpose, the utility model discloses plate beam hinge joint structure for the connection of the upper plate beam of the bridge, which comprises at least two upper plate beams with side surfaces connected.

[0010] The side surface of each two adjacent upper plate beams is provided with a facing hinge joint groove near the upper surface;

[0011] Each of the hinge joint grooves comprises a concave trapezoidal main groove;

[0012] The cross section of each of the main grooves is an isosceles trapezoid with the width of the bottom being larger than the width of the opening position;

[0013] The upper end of the side wall of each of the main grooves near the upper surface of the corresponding upper plate beam is provided with a slope between the upper surface of the corresponding upper plate beam;

[0014] After the splicing of each two adjacent upper plate beams, the corresponding two main grooves are provided with a sheet bottom film between the side wall away from the upper surface of the upper plate beam;

[0015] Each of the sheet bottom films forms a hinge joint pouring cavity with the two main grooves and the two slopes on both sides;

[0016] Each of the hinge joint pouring cavities is poured with UHPC high-performance concrete material to form a hinge joint.

[0017] Preferably, the bottom of each of the main grooves is provided with a flexible asphalt cushion layer.

[0018] Preferably, the side surface between each two adjacent upper plate beams is spaced by more than 60 mm; and the width of each of the hinge joint pouring cavities at the position of the upper surface of each two adjacent upper plate beams is more than 80 mm.

[0019] Preferably, the upper surface of all the upper plate beams and the corresponding hinge joints is paved with an asphalt concrete upper pavement.

[0020] Preferably, the sheet bottom film is made of steel.

[0021] The present application has the following beneficial effects:

[0022] The present application adopts the asphalt flexible layer and the UHPC material, has good durability and stability, and can effectively avoid potential diseases such as dislocation and damage of the traditional expansion joint.

[0023] The application of the present application can realize the bridge deck without obvious expansion joint, more effectively improve the overall structure, improve the driving comfort, and is beneficial to the later maintenance and reduces the life cycle cost.

[0024] The concept, specific structure and technical effects of the present application will be further described below with reference to the accompanying drawings, so as to fully understand the purpose, features and effects of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A schematic diagram of an embodiment of the present invention is shown. Detailed Implementation

[0026] Example

[0027] like Figure 1 As shown, the plate-beam hinge joint structure is used for connecting the upper plate beams 1 of the bridge, including at least two upper plate beams 1 with their sides connected.

[0028] On the side where each pair of upper beams 1 meet, near the top, there are facing hinge grooves 3.

[0029] Each hinge groove 31 includes a main groove 31 that is concave trapezoidal;

[0030] Each main groove 31 has a cross-section that is an isosceles trapezoid with the width at the bottom greater than the width at the opening.

[0031] Each main groove 31 has an inclined surface 32 between the upper end of the side wall of the corresponding upper plate beam 1 and the upper surface of the corresponding upper plate beam 1.

[0032] After each pair of upper plate beams 1 are spliced ​​together, a thin bottom film 4 is provided between the upper side wall of the corresponding two main grooves 31 away from the upper plate beam 1.

[0033] Each thin film 4 forms a hinged casting cavity with two main grooves 31 and two inclined surfaces 32 located on both sides;

[0034] Each hinge joint is formed by casting UHPC high-performance concrete material into the casting cavity.

[0035] This utility model addresses bridges where the span direction is perpendicular to the road's forward direction. Based on UHPC high-performance concrete material, it proposes a slab-beam hinge joint structure and construction process. The goal is to replace traditional expansion joint devices, which can improve driving stability, meet the requirements of temperature deformation in the longitudinal direction and normal bridge use, and can be applied to longer spans.

[0036] In this invention, after each pair of upper beams 1 are spliced ​​together, a thin bottom film 4 is provided between the side walls of the corresponding two main grooves 31 away from the upper beam 1 as a bottom mold to form a permanent template. The template has a wedge-shaped structure that is larger at the bottom and smaller at the top. Then, UHPC high-performance concrete material is used to fill the hinge joint and pour the cavity until it is full to form a hinge joint, which is used to restrain the shear deformation of the adjacent upper structure and make the deformation coordinated.

[0037] In some embodiments, a flexible asphalt pad is provided at the bottom of each main groove 31.

[0038] In practical application, the thickness of the flexible asphalt cushion is set according to the temperature deformation of the bridge in the longitudinal direction, for example, when the temperature is raised and lowered by ±25℃ at a width of 4m of the plate girder, the deformation is about 1mm, and then the flexible cushion with a thickness of 1mm is set.

[0039] In some embodiments, the distance between the side surfaces of every two adjacent upper plate girders 1 is more than 60mm; and the width of each casting cavity of the hinge joint at the position on the top of each two adjacent upper plate girders 1 is more than 80mm.

[0040] In some embodiments, the top of all the upper plate girders 1 and the hinge joints is paved with the asphalt concrete to form the upper pavement 5.

[0041] Finally, the conventional asphalt concrete is paved to form the upper pavement 5, and the road surface is seamless, which ensures the driving comfort.

[0042] In some embodiments, the sheet bottom film 4 is made of steel.

[0043] The utility model also provides a construction method of the plate girder hinge joint structure, which comprises the following steps:

[0044] Step 1, construction of all the upper plate girders 1;

[0045] Step 2, paving of the sheet bottom film 4;

[0046] Step 3, paving of the flexible asphalt cushion at the bottom of all the main grooves 31;

[0047] Step 4, casting of the UHPC high-performance concrete material in the hinge joint casting cavity;

[0048] Step 5, paving of the upper pavement 5 formed by the asphalt concrete on the top of the upper plate girders 1 and the hinge joints after the UHPC high-performance concrete material reaches the design strength.

[0049] In practical application, after the above steps are completed and the hinge joint construction is completed, the subsequent bridge construction of the remaining part needs to be continued.

[0050] The preferred embodiments of the utility model are described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the utility model without creative labor. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the utility model should be within the protection scope determined by the claims.

Claims

1. A hinged joint structure for connecting the upper slab beams (1) of a bridge; characterized in that, The upper plate beam (1) includes at least two side-connected sections; On the sides where each pair of upper plate beams (1) meet, near the top, there are facing hinge grooves (3). Each of the aforementioned hinge grooves (3) includes a main groove (31) that is concave trapezoidal; Each of the main grooves (31) has a cross-section that is an isosceles trapezoid with the width at the bottom greater than the width at the opening. Each of the main grooves (31) has an inclined surface (32) between the upper end of the side wall of the corresponding upper plate beam (1) and the upper surface of the corresponding upper plate beam (1); After each pair of upper plate beams (1) are spliced ​​together, a thin bottom film (4) is provided between the upper side walls of the corresponding two main grooves (31) away from the upper plate beams (1); Each of the sheet bottom film (4) forms a hinged casting cavity with the corresponding two main grooves (31) located on both sides and the two inclined surfaces (32); Each of the aforementioned hinge joints is formed by casting UHPC high-performance concrete material into the casting cavity.

2. The hinge joint structure of the plate beam according to claim 1, characterized in that, Each of the main grooves (31) is provided with a flexible asphalt pad at the bottom.

3. The hinge joint structure of the slab beam according to claim 1, characterized in that, The sides of each pair of connected upper plate beams (1) are spaced at least 60 mm apart; the width of each of the hinge casting cavities above each pair of connected upper plate beams (1) is at least 80 mm.

4. The hinge joint structure of the plate beam according to claim 1, characterized in that, All the upper beams (1) and the corresponding hinge joints are covered with an upper pavement (5) made of asphalt concrete.

5. The hinge joint structure of the plate beam according to claim 1, characterized in that, The thin film (4) is made of steel.

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