Maintenance and reinforcement structure for plate girder hinge joint

Abstract

The utility model provides a plate girder hinge joint maintenance reinforcing structure which comprises a first plate girder and a second plate girder which are arranged in a left-right mode to form a hinge joint, a plurality of reinforcing assemblies are symmetrically installed at the upper end and the lower end of the hinge joint, and each reinforcing assembly comprises a first reinforcing piece and a second reinforcing piece. Each of the first reinforcing member and the second reinforcing member comprises a mounting part and a connecting part; the mounting parts of the first reinforcing member and the second reinforcing member are respectively mounted on the first plate beam and the second plate beam; the connecting parts of the first reinforcing member and the second reinforcing member are butted outside the hinge joint left and right and extend along the length direction of the hinge joint; and fillers are arranged in the hinge joints. The reinforcing assemblies are symmetrically installed at the upper end and the lower end of the hinge joint, each reinforcing assembly is provided with the first reinforcing piece and the second reinforcing piece which are in left-right butt joint outside the hinge joint in a split mode, and the hinge joint is filled with the concrete, so that the function of reinforcing the shear capacity of the hinge joint is achieved, the bearing capacity and durability of a bridge are improved, and the problem that the hinge joint is short in service life is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hinged joint reinforcement, in particular to a plate-beam hinged joint maintenance and reinforcement structure. Background Art

[0002] As an important part of the upper plate-beam structure of conventional bridges, the plate-beam hinge joint is an important link between the upper plate-beam and the upper plate-beam. It is the key to whether the upper plate-beam structure of the bridge can bear stress as a whole. It is usually required that the hinge joint structure has high shear strength, strong adhesion of the hinge joint concrete, good density of the hinge joint casting, and good durability. It allows the plate-beam to rotate slightly when bearing loads and only transmits shear force, thereby maintaining the overall stability of the bridge. However, due to various factors in the design, construction and operation process, such as the lack of compaction of the hinge joint concrete, inadequate treatment of the plate-beam hinge joint contact surface, unbalanced support installation, repeated action of heavy-loaded vehicles, etc., the plate-beam hinge joint often fails due to cracking, water seepage and other diseases, resulting in damage to the integrity of the bridge structure and the phenomenon of single plate stress, which in turn affects the safety and service life of the bridge.

[0003] Chinese patent CN208762895U discloses a hinged joint reinforcement device, including a left prefabricated plate beam and a right prefabricated plate beam, a longitudinal hinged joint is formed between the left prefabricated plate beam and the right prefabricated plate beam; a lower reinforcement member is installed at the lower end of the hinged joint; an upper reinforcement member is installed at the upper end of the hinged joint; wherein the lower reinforcement member includes an integrally formed lower reinforcement steel plate and a lower hollow steel pipe fixedly connected to the lower reinforcement steel plate; and the upper reinforcement member includes an integrally formed upper reinforcement steel plate and an upper solid steel pipe fixedly connected to the upper reinforcement steel plate. The advantages are: it can effectively reinforce the hinged joint of the bridge, prevent the expansion of the hinged joint of the bridge, solve the problem of poor reinforcement effect of the hinged joint of the existing bridge, simple structure, low cost, convenient preparation, and fast construction operation.

[0004] However, this technical solution has the following problems: first, the hollow and solid steel pipes of the upper and lower fixing parts are threadedly connected in the hinged joint and can only be used in the construction stage before the hinged joint is cast, and cannot be used to reinforce the hinged joint after it is damaged and fails; second, the upper and lower reinforcement parts are both connected by steel plates and the plate beams on both sides. When subjected to the shear force from the plate beams, the steel plates are easily deformed, which affects the structural strength of the hinged joint and shortens its service life. Utility Model Content

[0005] The purpose of the utility model is to provide a plate-beam hinged joint maintenance and reinforcement structure in view of the deficiencies in the prior art, by symmetrically installing reinforcement components at the upper and lower ends of the hinged joint, the reinforcement components are split and provided with a first reinforcement piece and a second reinforcement piece which are butted against the outside of the hinged joint on the left and right sides, and cooperate with the concrete filled in the hinged joint to achieve the function of strengthening the shear resistance of the hinged joint, thereby improving the bearing capacity and durability of the bridge and solving the problem of short service life of the hinged joint.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A plate beam hinged joint maintenance and reinforcement structure, comprising a first plate beam and a second plate beam arranged left and right to form a hinged joint, wherein a plurality of reinforcement components are symmetrically installed at upper and lower ends of the hinged joint, wherein the reinforcement components include a first reinforcement member and a second reinforcement member, and the first reinforcement member and the second reinforcement member both include a mounting portion and a connecting portion;

[0008] The mounting parts of the first reinforcement member and the second reinforcement member are respectively mounted on the first plate beam and the second plate beam; the connecting parts of the first reinforcement member and the second reinforcement member are butted against the outside of the hinged seam on the left and right and extend along the length direction of the hinged seam;

[0009] A filler is arranged in the hinged seam.

[0010] As a preferred embodiment, the first reinforcement member and the second reinforcement member are bilaterally symmetrical; the mounting portion is horizontally arranged; and the connecting portion is vertically arranged perpendicular to the mounting portion.

[0011] Preferably, the mounting portion is respectively mounted on the upper and lower surfaces of the first plate beam and the second plate beam through at least one first fastener; and the connecting portion is butt-jointed to the outer sides of the upper and lower ends of the hinged joint through at least one second fastener.

[0012] Preferably, the first fastener is an expansion bolt, and its installation depth is not less than 10 cm.

[0013] As a preference, the second fastener is a structural bolt.

[0014] As a preference, outer ends of the mounting portion and the connecting portion are both provided with inclined surfaces.

[0015] Preferably, the first reinforcement member and the second reinforcement member are angle steels with a thickness of 8-12 mm and a length of 150-250 mm in the horizontal direction of the hinged seam.

[0016] As a preference, the mounting portion is 120-200 mm wide, and the connecting portion is 75-125 mm high.

[0017] As a preference, the filler comprises concrete and an adhesive.

[0018] Preferably, the reinforcement components are evenly arranged in the horizontal direction of the hinged joint and are spaced at intervals of 0.8-1.2 m.

[0019] The beneficial effects of the utility model are:

[0020] (1) The utility model symmetrically installs reinforcement components at the upper and lower ends of the hinged joint. The reinforcement components are split and include a first reinforcement member and a second reinforcement member that are butt-jointed to the outside of the hinged joint on the left and right sides. The reinforcement members cooperate with the concrete filled in the hinged joint to enhance the shear resistance of the hinged joint, thereby improving the bearing capacity and durability of the bridge.

[0021] (2) The utility model optimizes the stress distribution of the hinge joint and its surrounding structures, reduces stress concentration, improves the fatigue resistance of the overall structure, achieves all-round reinforcement of the hinge joint, enhances the connection stability between the plate beam and reduces vibration and displacement caused by vehicle loads by symmetrically arranging the first and second reinforcement members and the coordination of the mounting portion and the connecting portion.

[0022] (3) The utility model ensures the durability of the reinforcement effect by firmly fixing the mounting parts and the connecting parts using a plurality of first fasteners and second fasteners.

[0023] (4) The utility model adopts angle steel as a reinforcement member, which is easy and quick to install, and the specific size and installation spacing can be adjusted according to actual engineering requirements, thereby improving the flexibility of installation and the scope of application of the structure.

[0024] In summary, the utility model has the advantages of strong shear resistance, good durability and stability, convenient and flexible installation, etc., which improves the overall performance and service life of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 For this utility model Figure 1 The local enlarged schematic diagram of point I in the middle;

[0027] Figure 3 It is a schematic diagram of the structure of the utility model from top view. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] Embodiment 1

[0031] like Figure 1-3 As shown, the present embodiment provides a plate beam hinged joint maintenance and reinforcement structure, comprising a first plate beam 2 and a second plate beam 3 which are arranged on the left and right sides to form a hinged joint 1, wherein a plurality of reinforcement components 4 are symmetrically installed at the upper and lower ends of the hinged joint 1, wherein the reinforcement components 4 include a first reinforcement member 5 and a second reinforcement member 6, wherein the first reinforcement member 5 and the second reinforcement member 6 both include an installation portion 7 and a connection portion 8; the installation portions 7 of the first reinforcement member 5 and the second reinforcement member 6 are respectively installed on the first plate beam 2 and the second plate beam 3; the connection portions 8 of the first reinforcement member 5 and the second reinforcement member 6 are butt-jointed to the outside of the hinged joint 1 on the left and right sides and extend along the length direction of the hinged joint 1; a filler 11 is arranged in the hinged joint 1, and the filler 11 includes concrete.

[0032] By symmetrically installing the reinforcement component 4 at the upper and lower ends of the hinged joint 1, the reinforcement component 4 is split and provided with a first reinforcement piece 5 and a second reinforcement piece 6 that are connected to the outside of the hinged joint 1 on the left and right, and cooperate with the concrete filled in the hinged joint 1 to achieve the function of strengthening the shear resistance of the hinged joint 1, thereby improving the bearing capacity and durability of the bridge.

[0033] like Figure 1 , 2 As shown, the first reinforcement member 5 and the second reinforcement member 6 are bilaterally symmetrical; the mounting portion 7 is horizontally arranged; and the connecting portion 8 is vertically arranged perpendicular to the mounting portion 7 .

[0034] By symmetrically arranging the first reinforcement 5 and the second reinforcement 6 and the coordination of the mounting portion 7 and the connecting portion 8, it is beneficial to optimize the stress distribution of the hinged joint 1 and its surrounding structures, reduce stress concentration, improve the fatigue resistance of the overall structure, achieve all-round reinforcement of the hinged joint 1, enhance the connection stability between the plate beams, and reduce vibration and displacement caused by vehicle loads.

[0035] like Figure 1 , 2 As shown, the mounting portion 7 is respectively mounted on the upper and lower surfaces of the first plate beam 2 and the second plate beam 3 through at least one first fastener 9; the connecting portion 8 is butt-jointed to the outer sides of the upper and lower ends of the hinged joint 1 through at least one second fastener 10. The first fastener 9 is an expansion bolt, and its installation depth is not less than 10 cm. The second fastener 10 is a structural bolt.

[0036] The mounting portion 7 and the connecting portion 8 are firmly fixed by using a plurality of first fasteners 9 and second fasteners 10, thereby ensuring the durability of the reinforcement effect.

[0037] like Figure 2 As shown, the outer ends of the mounting portion 7 and the connecting portion 8 are both provided with inclined surfaces 12, so that the reinforcement component 4 can cooperate more closely with the filling layers such as concrete and asphalt laid above, and the transition is smooth.

[0038] like Figure 2 , 3 As shown, the first reinforcement member 5 and the second reinforcement member 6 are angle steels with a thickness of 8-12 mm and a length of 150-250 mm in the horizontal direction of the hinged joint 1. The mounting portion 7 is 120-200 mm wide, and the connecting portion 8 is 75-125 mm high. The reinforcement components 4 are evenly arranged in the horizontal direction of the hinged joint 1, and the intervals are 0.8-1.2 m.

[0039] By using angle steel as a reinforcement, installation is simple and quick, and the specific size and installation spacing can be adjusted according to actual engineering needs, thereby improving the flexibility of installation and the scope of application of the structure.

[0040] Embodiment 2

[0041] like Figure 1 As shown, the same or corresponding parts as those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The difference between the second embodiment and the first embodiment is that the present embodiment mainly targets the case where the hinged joint 1 is damaged and ineffective, and the reinforcement structure is used to repair the hinged joint 1. The filler 11 also includes an adhesive, preferably a steel adhesive.

[0042] The working steps are as follows:

[0043] Step 1: milling the bridge deck to expose the damaged hinged joint 1, chiseling out the damaged hinged joint 1, and restoring the steel bar and concrete structure of the hinged joint 1;

[0044] Step 2: Arrange the reinforcement components 4 at intervals of 1m along the length direction of the hinge joint 1, determine the drilling positions of the plate beams, and drill holes on the plate beams with an impact drill, and the drilling depth is not less than 10cm;

[0045] Step 3: Use M12 expansion bolts to anchor two reinforcements with side lengths of 160 mm and 100 mm and thickness of 10 mm back to back at the corresponding positions of the top and bottom of the plate beam on both sides of the hinged joint 1, and use M12 bolts to anchor the connection parts 8 of the two reinforcements at the backrest to make the reinforcement and the plate beam form a whole and bear the force together;

[0046] Step 4: Use pressure grouting to press the special steel-bonding adhesive from the grouting pipe into the space between the reinforcement and the concrete at a pressure of 0.2-0.4 MPa. Stop grouting after grout comes out from the other side to further enhance the reliability of the hinge joint reinforcement structure.

[0047] Step 5: After the steel adhesive solidifies, resume the bridge deck paving.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plate beam hinge joint maintenance and reinforcement structure, comprising a first plate beam and a second plate beam arranged left and right to form a hinge joint, characterized in that: A plurality of reinforcement components are symmetrically installed at the upper and lower ends of the hinged joint, and the reinforcement components include a first reinforcement member and a second reinforcement member, and the first reinforcement member and the second reinforcement member both include a mounting portion and a connecting portion; The mounting parts of the first reinforcement member and the second reinforcement member are respectively mounted on the first plate beam and the second plate beam; the connecting parts of the first reinforcement member and the second reinforcement member are butted against the outside of the hinged seam on the left and right and extend along the length direction of the hinged seam; A filler is arranged in the hinged seam.

2. A plate beam hinge joint maintenance and reinforcement structure according to claim 1, characterized in that: The first reinforcement member and the second reinforcement member are bilaterally symmetrical; the mounting portion is horizontally arranged; and the connecting portion is vertically arranged perpendicular to the mounting portion.

3. A plate beam hinge joint maintenance and reinforcement structure according to claim 2, characterized in that: The mounting portion is respectively mounted on the upper and lower surfaces of the first plate beam and the second plate beam through at least one first fastener; and the connecting portion is butted against the outer sides of the upper and lower ends of the hinged joint through at least one second fastener.

4. A plate beam hinge joint maintenance and reinforcement structure according to claim 3, characterized in that: The first fastener is an expansion bolt, and its installation depth is not less than 10 cm.

5. The plate beam hinge joint maintenance and reinforcement structure according to claim 3 is characterized in that: The second fastener is a structural bolt.

6. The plate beam hinge joint maintenance and reinforcement structure according to claim 1 is characterized in that: The outer ends of the mounting portion and the connecting portion are both provided with inclined surfaces.

7. The plate beam hinge joint maintenance and reinforcement structure according to claim 1 is characterized in that: The first reinforcement member and the second reinforcement member are angle steels with a thickness of 8-12 mm and a length of 150-250 mm in the horizontal direction of the hinged seam.

8. The plate beam hinge joint maintenance and reinforcement structure according to claim 1 is characterized in that: The installation portion is 120-200 mm wide, and the connection portion is 75-125 mm high.

9. The plate beam hinge joint maintenance and reinforcement structure according to claim 1 is characterized in that: The filling material includes concrete and a binder.

10. The plate beam hinge joint maintenance and reinforcement structure according to claim 1, characterized in that: The reinforcement components are evenly arranged along the horizontal direction of the hinged joint, and the intervals are 0.8-1.2m.

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