A reinforcing method for hinge joint of bridge hollow slab

Abstract

The application provides a reinforcing method for hinge joints of a hollow slab bridge, comprising the following steps: inserting a vertical steel plate into the hinge joint, and simultaneously hoisting a first U-shaped steel plate to the top of the top plate of the hollow slab, hoisting a second U-shaped steel plate to the bottom of the bottom plate of the hollow slab, and connecting the top of the vertical steel plate to the first U-shaped steel plate by bolts, and connecting the bottom of the vertical steel plate to the second U-shaped steel plate by bolts; fixing the second U-shaped steel plate to the bottom of the bottom plate of the hollow slab by a plurality of bolts which are arranged at intervals; injecting a filling material between the hinge joint and the vertical steel plate through a reserved grouting hole on the first U-shaped steel plate; pouring a first layer of concrete on the upper surface of the top plate of the hollow slab and a second layer of concrete on the lower surface of the bottom plate of the hollow slab by a formwork respectively; and restoring the bridge pavement to complete the overall reinforcement of the hollow slab bridge. The method can improve the overall rigidity of the bridge and has good overall stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building, in particular to a reinforcing method of hinge joint of bridge hollow slab. BACKGROUND

[0002] At present, most of the hollow slab beams built in China are spliced by hinge joints. However, with the substantial increase in the number of vehicles and traffic volume, vehicle load overload, material natural aging, environmental erosion and other factors, a large number of hinge joints have diseases, which greatly weaken the bearing capacity of the hollow slab beam, and many hollow slab beams need to be reinforced. SUMMARY

[0003] The present application provides a reinforcing method of hinge joint of bridge hollow slab, aiming at solving the problem of poor stability of existing bridge hinge joint.

[0004] The technical scheme of the present application is as follows:

[0005] A reinforcing method of hinge joint of bridge hollow slab, comprising the following steps:

[0006] S1, cleaning the bridge deck pavement and hinge joint of the hollow slab bridge;

[0007] S2, inserting a vertical steel plate into the hinge joint, and simultaneously hoisting a first U-shaped steel plate to the top of the hollow slab top plate, hoisting a second U-shaped steel plate to the bottom of the hollow slab bottom plate, and connecting the top of the vertical steel plate to the first U-shaped steel plate by bolts, and connecting the bottom of the vertical steel plate to the second U-shaped steel plate by bolts;

[0008] S3, fixing the second U-shaped steel plate to the bottom of the hollow slab bottom plate by a plurality of spaced bolts;

[0009] S4, injecting joint filling material between the hinge joint and the vertical steel plate through the reserved grouting hole on the first U-shaped steel plate;

[0010] S5, pouring first layer of concrete on the upper surface of the hollow slab top plate and second layer of concrete on the lower surface of the hollow slab bottom plate through the formwork respectively;

[0011] S6, restoring the bridge deck pavement and completing the overall reinforcement of the hollow slab bridge.

[0012] As a technical scheme of the present application, in step S2, the length of the vertical steel plate is greater than the length of the hinge joint to be reinforced, and the top end of the vertical steel plate penetrates through the hollow slab top plate and the bottom end penetrates through the hollow slab bottom plate.

[0013] As one technical solution of this application, in step S2, multiple rows of shear nails and grout outlet holes are arranged alternately along the length direction on the vertical steel plate. Each row of shear nails is equally spaced along the height direction of the vertical steel plate, and each row of grout outlet holes is equally spaced along the height direction of the vertical steel plate.

[0014] As a technical solution of this application, in step S2, multiple bolt holes are reserved at intervals on the top and bottom ends of the vertical steel plate.

[0015] As a technical solution of this application, in step S2, the two sides of the first U-shaped steel plate are respectively welded to the opposite sides of the hollow plate top plate, and multiple bolt holes are reserved on the two sides at intervals. The height of the two sides of the first U-shaped steel plate is flush with the height of the exposed end on the top of the vertical steel plate. The two sides of the second U-shaped steel plate are respectively welded to the opposite sides of the hollow plate bottom plate, and multiple bolt holes are reserved on the two sides at intervals. The height of the two sides of the second U-shaped steel plate is flush with the height of the exposed end on the bottom of the vertical steel plate.

[0016] As a technical solution of this application, in step S3, multiple bolt holes are reserved at both ends of the second U-shaped steel plate, and the second U-shaped steel plate is fixed to the hollow plate base plate by installing bolts into the bolt holes.

[0017] As one technical solution of this application, in step S5, the thickness of the first layer of concrete poured is equal to or greater than the height of both sides of the first U-shaped steel plate, and the thickness of the second layer of concrete poured is equal to or greater than the height of both sides of the second U-shaped steel plate. Beneficial effects of this application:

[0018] This application provides a method for reinforcing the hinge joints of hollow slabs in bridges. The method forms a stiffening frame by connecting vertical steel plates with a first U-shaped steel plate and a second U-shaped steel plate, thereby improving the overall stiffness of the bridge and giving it good overall stability. At the same time, shear studs and grout outlet holes are arranged alternately on the vertical steel plates, which can effectively extend the service life by improving the lateral connection and providing strong shear bearing capacity. The construction steps are simple and quick, and the method is highly feasible. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a hollow bridge slab provided in an embodiment of this application;

[0021] Figure 2 A schematic diagram of the vertical steel plate provided in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram showing the connection between the vertical steel plate and the first U-shaped steel plate provided in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram showing the connection between the vertical steel plate and the second U-shaped steel plate provided in an embodiment of this application.

[0024] Icons: 1-Vertical steel plate; 2-First U-shaped steel plate; 3-Hollow slab top plate; 4-Second U-shaped steel plate; 5-Hollow slab bottom plate; 6-First layer of concrete; 7-Second layer of concrete; 8-Shear studs; 9-Grouting holes; 10-Sealing material. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this application, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only used to facilitate the description of this application and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] Furthermore, in this application, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Moreover, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Example:

[0033] Please refer to Figure 1 (Refer to) Figures 2 to 4 This application provides a method for reinforcing the hinge joint of a hollow slab in a bridge, which mainly includes the following steps:

[0034] S1, Clean the bridge deck pavement and hinge joints of hollow slab bridges;

[0035] S2, insert the vertical steel plate 1 into the hinge joint, and at the same time hoist the first U-shaped steel plate 2 onto the top of the hollow slab top plate 3 and the second U-shaped steel plate 4 onto the bottom of the hollow slab bottom plate 5. The top of the vertical steel plate 1 is bolted to the first U-shaped steel plate 2, and the bottom of the vertical steel plate 1 is bolted to the second U-shaped steel plate 4.

[0036] S3, the second U-shaped steel plate 4 is fixed to the bottom of the hollow plate base plate 5 by a number of bolts spaced at intervals;

[0037] S4, inject grouting material 10 into the space between the hinge joint and the vertical steel plate 1 through the grouting hole reserved on the first U-shaped steel plate 2;

[0038] S5, by supporting the formwork, the first layer of concrete 6 is poured on the upper surface of the hollow slab top plate 3 and the second layer of concrete 7 is poured on the lower surface of the hollow slab bottom plate 5.

[0039] S6, restore the bridge deck pavement and complete the overall reinforcement of the hollow slab bridge.

[0040] It should be noted that in step S2, the length of the vertical steel plate 1 is greater than the length of the hinge joint to be reinforced, and the top end of the vertical steel plate 1 passes through the top plate 3 of the hollow slab, and the bottom end passes through the bottom plate 5 of the hollow slab. Multiple rows of shear studs 8 and grout outlet holes 9 are arranged alternately along the length direction of the vertical steel plate 1. Each row of shear studs 8 is equally spaced along the height direction of the vertical steel plate 1, and each row of grout outlet holes 9 is equally spaced along the height direction of the vertical steel plate 1. Furthermore, multiple spaced bolt holes are pre-drilled at the top and bottom ends of the vertical steel plate 1, which are then connected to the first U-shaped steel plate 2 and the second U-shaped steel plate 4, respectively.

[0041] Meanwhile, the two sides of the first U-shaped steel plate 2 are respectively welded to the opposite sides of the hollow plate top plate 3, and multiple bolt holes are reserved on both sides at intervals. The height of the two sides of the first U-shaped steel plate 2 is flush with the height of the exposed end on the top of the vertical steel plate 1. The two sides of the second U-shaped steel plate 4 are respectively welded to the opposite sides of the hollow plate bottom plate 5, and multiple bolt holes are reserved on both sides at intervals. The height of the two sides of the second U-shaped steel plate 4 is flush with the height of the exposed end on the bottom of the vertical steel plate 1.

[0042] In addition, in step S3, multiple bolt holes are pre-drilled at both ends of the second U-shaped steel plate 4, and the second U-shaped steel plate 4 is fixed to the hollow plate base plate 5 by installing bolts into the bolt holes.

[0043] Meanwhile, in step S5, the thickness of the first layer of concrete 6 is equal to or greater than the height of both sides of the first U-shaped steel plate 2, and the thickness of the second layer of concrete 7 is equal to or greater than the height of both sides of the second U-shaped steel plate 4.

[0044] In summary, this application provides a method for reinforcing the hinge joints of hollow slab bridges. The method utilizes the interconnection between vertical steel plates 1 and the first U-shaped steel plates 2 and 4 to form a stiffening frame, thereby improving the overall rigidity of the bridge and enhancing its overall stability. Simultaneously, the staggered arrangement of shear studs 8 and grout outlet holes 9 on the vertical steel plates 1 enhances lateral connections and provides stronger shear bearing capacity, effectively extending their service life. Furthermore, the construction process is simple, quick, and highly feasible. This reinforcement method is simple to operate, requires no pre-embedded reinforcing bars, and yields significant reinforcement results.

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for reinforcing the hinge joint of a hollow slab in a bridge, characterized in that, Includes the following steps: S1, Clean the bridge deck pavement and hinge joints of hollow slab bridges; S2, insert the vertical steel plate into the hinge joint, and simultaneously hoist the first U-shaped steel plate onto the top of the hollow slab top plate and the second U-shaped steel plate onto the bottom of the hollow slab bottom plate. The top of the vertical steel plate is bolted to the first U-shaped steel plate, and the bottom of the vertical steel plate is bolted to the second U-shaped steel plate. The length of the vertical steel plate is greater than the length of the hinge joint to be reinforced, and the top of the vertical steel plate passes through the hollow slab top plate, and the bottom of the vertical steel plate passes through the hollow slab bottom plate. Multiple rows of shear studs and grout outlet holes are arranged alternately along the length of the vertical steel plate, with each row of shear studs... The vertical steel plates are arranged at equal intervals along their height direction, and the slurry outlet holes in each row are also arranged at equal intervals along the height direction of the vertical steel plates. The two sides of the first U-shaped steel plate are welded to the opposite sides of the hollow slab top plate, and multiple bolt holes are reserved on both sides at intervals. The height of the two sides of the first U-shaped steel plate is flush with the height of the exposed end at the top of the vertical steel plate. The two sides of the second U-shaped steel plate are welded to the opposite sides of the hollow slab bottom plate, and multiple bolt holes are reserved on both sides at intervals. The height of the two sides of the second U-shaped steel plate is flush with the height of the exposed end at the bottom of the vertical steel plate. S3, the second U-shaped steel plate is fixed to the bottom of the hollow plate base plate by a plurality of bolts spaced apart; a plurality of bolt holes are reserved at both ends of the second U-shaped steel plate, and the second U-shaped steel plate is fixed to the hollow plate base plate by installing bolts into the bolt holes; S4, inject grouting material between the hinge and the vertical steel plate through the grouting hole reserved on the first U-shaped steel plate; S5, using formwork, pour a first layer of concrete on the upper surface of the hollow slab top plate and a second layer of concrete on the lower surface of the hollow slab bottom plate; the thickness of the first layer of concrete is equal to or greater than the height of the two sides of the first U-shaped steel plate, and the thickness of the second layer of concrete is equal to or greater than the height of the two sides of the second U-shaped steel plate. S6, restore the bridge deck pavement to complete the overall reinforcement of the hollow slab bridge.

2. The method for reinforcing the hinge joint of a hollow bridge slab according to claim 1, characterized in that, In step S2, multiple bolt holes are pre-drilled at intervals on both the top and bottom ends of the vertical steel plate.

Images