Opening and closing type bridge expansion joint device

Abstract

The utility model relates to the technical field of bridge construction, and particularly discloses an opening and closing type bridge expansion joint device. Comprising the steps that a movable hinge connecting rod is used, a large ball is pushed to open a pentagonal prism connecting rod, and the device is fixed to a board; a sawtooth-shaped push rod is used for preventing the supporting connecting rod from slipping; a steel plate structure is adopted, the structural strength is improved, and a free moving space is provided for the whole expansion joint device. The steel saw blade pushes the steel balls, the pentagonal prism type steel can be expanded to be tightly attached to the pentagonal prism groove face, meanwhile, the steel saw blade and the sawteeth are embedded, and finally the purpose of being firmly combined with the bridge deck is achieved. By the adoption of the symmetrically-arranged I-shaped steel, when the beam bodies on the two sides drive the corresponding I-shaped steel of the expansion joint to move relatively, the steel balls have a certain free moving space, the buffering effect is provided for vertical relative displacement of the beam bodies, and finally the purpose of enhancing the structural strength is achieved.

Description

Technical Field

[0001] The utility model relates to the field of bridge expansion joints in the technical field of bridge construction, and specifically discloses an opening and closing type bridge expansion joint device. Background Art

[0002] In order to meet the requirements of bridge deformation, expansion joints are usually installed between the two beam ends. The principle of its installation is to reserve gaps in the vertical direction at certain intervals along the length of the building or at locations where the structure changes greatly, and to disconnect all the building components above the foundation, dividing them into independent parts that can freely expand and contract in the horizontal direction. The main structure of the traditional expansion joint device is mainly composed of special-shaped steel and anchor steel bars, which is mainly used to prevent cracks in the structural components caused by thermal expansion and contraction. However, during the operation of the bridge, there is a large amount of traffic, high speed, and many loaded vehicles. The huge impact force of the wheels causes some expansion joints of the plate expansion joints and rubber expansion joints to be damaged, loosened, or fall off, and some even cause damage to the bridge deck, seriously affecting driving safety. Utility Model Content

[0003] The utility model aims to provide an opening and closing type bridge expansion joint device to solve the problems of insufficient structural strength and weak connection with the bridge deck of the existing bridge expansion joint device.

[0004] The technical solution adopted by the utility model is: a bridge expansion joint device with an opening and closing type, including an expansion joint I-beam, a column steel, a movable hinge, a pentagonal column steel, a steel ball, a steel saw blade, a sawtooth, a connecting cavity, a block, a connecting ball, and a steel plate. The opposite surfaces of the bridge expansion joint are dug with grooves containing inclined surfaces, the opening and closing type expansion joint device is located between the bridge expansion joints, and the pentagonal column steel that can be opened and closed extends into the groove of the bridge, and the steel saw blade can be pushed to push the steel ball to move out of the device, so that the pentagonal column steel is opened and supported and fixed in the expansion joint of the bridge, and after the installation of the device is completed, concrete can be poured between the steel plates of the opening and closing type expansion joint device.

[0005] Furthermore, a buffer structure consisting of a connecting cavity, a connecting ball and a block is provided on the I-beam of the device. When the beams on both sides of the expansion joint are deformed, the beams on both sides drive the corresponding I-beams of the expansion joint to undergo relative displacement. When the I-beam of the expansion joint undergoes horizontal relative displacement, the I-beam of the expansion joint and the steel ball in the connecting cavity undergo horizontal relative displacement, and there is space for free movement in the horizontal direction. Furthermore, the inner wall of the connecting cavity restricts the steel ball from leaving the connecting cavity, and the limited free movement space in the cavity also prevents excessive deformation of the beam.

[0006] Furthermore, a buffer structure consisting of a connecting cavity, connecting balls and a block is provided on the I-beam of the device. When the beams are misaligned with each other, the beams drive the expansion joint I-beams to move up and down in an alternating manner. Since the steel balls have space for free movement in the vertical direction in the connecting cavity, a buffer effect is provided for the up and down relative displacement of the beams. Steel balls are placed inside the connecting cavity and welded to steel plates. The steel plates are hollow between adjacent steel plates. After the steel saw blades are pushed to complete the installation of the expansion joint device, concrete can be poured in the hollow part between the steel plates.

[0007] Furthermore, two groups of column-shaped steels with rectangular cross-sections are welded on the back sides of the I-beams, and one end of the column-shaped steel is hinged to another pentagonal column-shaped steel with a right-angled trapezoidal longitudinal cross-section, so as to realize opening and closing movements; a steel ball with a diameter the same as the distance between the upper and lower column-shaped steels is placed in the middle of the column-shaped steel with a rectangular cross-section on one side, which can push the pentagonal column-shaped steel with a right-angled trapezoidal longitudinal cross-section to open and close.

[0008] Furthermore, a cavity is provided on the side of the I-beam plate to push the saw blade, and the steel saw blade passes through the center of the waist plate of the I-beam in the width direction of the I-beam and can move in this direction; the lower part of the steel saw blade has saw teeth, and the saw teeth are directed inward; the longitudinal section of the non-sawtooth part is a right-angled trapezoid, and the shorter side is in contact with the steel ball. After pushing the saw blade, the steel saw blade and the saw teeth can be interlocked, and at the same time, after the pentagonal prism column steel is opened, a locking device is used to prevent the steel ball from moving backward.

[0009] Furthermore, before installation, the device needs to dig an inclined groove in the bridge body with a depth slightly greater than the length of the column steel, and it is necessary to ensure that the angle between the inclined surface of the pentagonal column steel and the horizontal plane is larger than the angle between the inclined surface of the inner wall of the groove and the horizontal plane, so as to ensure that the pentagonal column steel can be fixedly supported on the inner wall of the inclined groove after it is fully opened.

[0010] Furthermore, the device can effectively realize the transmission of force. After the installation of the device is completed, the saw blade and the saw teeth are engaged and cannot move back. Relying on this part, the bridge can transmit the force through the inner wall of the groove in sequence through the pentagonal column steel, steel ball, saw blade, saw teeth, and finally to the steel plate of the expansion joint device.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The steel ball used in the opening and closing bridge expansion joint device of the utility model pushes the saw blade to move the steel ball inward, pushes the pentagonal column steel to open and complete the installation, and the device installation method is convenient;

[0013] 2. The expansion joint device of the utility model is provided with a pentagonal column steel that can rotate around the hinge, and is provided with a pair of mutually interlocking saw blades to play a driving role. When the pentagonal column steel is opened to support the bridge body in the trench, the pressure exerted by the bridge body on the pentagonal column steel will be transmitted to the steel ball, saw blade, column steel and I-beam in turn, thereby improving the overall stability of the bridge structure;

[0014] 3. The expansion joint device of the bridge of the utility model is provided with a buffer space, which is conducive to providing free space for the displacement of the bridge in the up and down and left and right directions during use, limiting and buffering the deformation of the bridge, and avoiding the phenomenon of bridge deck fracture caused by the rigid connection of the expansion joint device of the bridge;

[0015] 4. The expansion joint device of the bridge of the utility model is mainly fixedly connected by the expansion joint structure and concrete pouring, which can ensure the tight connection between the components of the device and improve the overall structural stability of the expansion joint device of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial stereoscopic diagram of the opening and closing bridge expansion joint device of the utility model;

[0017] Figure 2 It is a longitudinal sectional view of the opening and closing bridge expansion joint device of the utility model;

[0018] Figure 3 It is a left view of the opening and closing bridge expansion joint device of the utility model;

[0019] Figure 4 It is an overall stereoscopic diagram of the opening and closing type bridge expansion joint device of the utility model.

[0020] The reference numerals in the above drawings are explained as follows:

[0021] Expansion joint I-beam-1; column steel-2; movable hinge-3; pentagonal column steel-4; steel ball-5; steel saw blade-6; saw teeth-7; connecting cavity-8; stopper-9; connecting ball-10; steel plate-11. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer and more specific, the utility model is further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1As shown in —4, an embodiment of the utility model discloses an opening and closing type bridge expansion joint device, comprising a symmetrically arranged expansion joint I-beam 1, wherein two groups of connecting cavities 8 are opened on the facing surfaces of the expansion joint I-beam 1, and the connecting cavities 8 have a rectangular longitudinal section, and penetrate the expansion joint I-beam 1 along the length direction of the expansion joint I-beam 1; connecting balls 10 are placed in the connecting cavities 8, which are steel spheres; blocks 9 are welded at the openings of the connecting cavities, which are rectangular steel in longitudinal section; the middle of the expansion joint I-beam 1 is penetrated by a steel saw blade 6 along the width direction of the I-beam, so that movement can be achieved; two groups of column steels 2 are welded on the opposite back sides of the expansion joint I-beam 1, and the column steels 2 have a rectangular longitudinal section; the column steels 2 are connected to the pentagonal column steels 4 through movable hinges 3; the pentagonal column steels 4 have a pentagonal longitudinal section, and have freedom in the rotation direction; saw teeth 7 are welded on the upper side of the lower part of the column steel 2, which are embedded with the steel saw blade 6.

[0024] When installing the expansion joint device, it is necessary to first dig out a groove with a pentagonal prism in the longitudinal section of the beams on both sides, put the expansion joint device into the groove, and push the steel saw blade 6; after the steel saw blade 6 is pushed, it pushes the steel ball 5 to slide inside the beam; as the steel ball 5 slides inward, the pentagonal prism column steel 4 is pushed open by the steel ball 5 until the pentagonal prism column steel 4 contacts the inner wall of the groove dug in the beam body, and in the subsequent step of concrete pouring, the concrete will fill the gap between the expansion joint device components and the bridge groove to achieve a fixing effect.

[0025] When the beams on both sides of the expansion joint are deformed, the beams on both sides drive the expansion joint I-beam 1 to undergo relative displacement; when the expansion joint I-beam 1 undergoes relative displacement, relative displacement occurs between the expansion joint I-beam 1 and the connecting ball 10, and at this time, the connecting ball 10 displaces in the connecting cavity 8, and the connecting ball 10 drives the steel plate 11 to undergo relative displacement; and the block 9 welded to the opening of the connecting cavity 8 limits the connection ball 10 from leaving the connecting cavity 8, and limits the movement of the connecting ball 10 together with the inner wall of the connecting cavity 8, to avoid excessive deformation.

[0026] When the beams on both sides of the expansion joint are deformed, the force applied by the beams to the expansion joint device is transmitted to the steel ball 5 through the pentagonal column steel 4, and then transmitted to the steel saw blade 6 by the steel ball 5, so that the steel saw blade 6 and the saw teeth 7 are more closely embedded, which is conducive to the fixation of the device in the beam.

[0027] The implementation process of this utility model:

[0028] First, during the production process, a certain amount of connecting cavity 8 is dug out on one side of the I-beam 1, and a connecting ball 10 is placed in each connecting cavity 8, and a stopper 9 is welded at the connecting cavity 8 to prevent the connecting ball 10 from falling off; except for the upper and lower corners of the steel plate 11, a certain rectangular volume of steel plate is cut off on both sides of the steel plate so that the steel plate 11 can be welded with the connecting ball 8; the column steel 2 and the pentagonal column steel 4 are connected by a movable hinge 3, and a sawtooth 7 is welded on half of the column steel 2; after the two I-beams 1 are connected with the steel plate 11, a connecting rod formed by the column steel 2, the movable hinge 3 and the pentagonal column steel 4 is welded on the other side of the I-beam 1, and at the same time, the connecting rod with the sawtooth 7 needs to be welded on the lower side, and the connecting rod without welded sawtooth is welded on the upper side, and a steel ball 5 is placed between each group of connecting rods; finally, a square hole penetrating the I-beam 1 is dug out in the middle of each group of connecting rods, and a steel saw blade 6 is placed in the square hole. During the construction process, it is necessary to first dig an inclined groove on the opposite side of the bridge expansion joint, then place the device into the expansion joint, and extend the pentagonal column steel 4 into the groove, and then push the steel saw blade 6, thereby pushing the steel ball 5, so that the pentagonal column steel 4 opens and is supported and fixed on the inner wall of the inclined groove; finally, concrete is poured between each group of steel plates 11 to complete the installation.

[0029] This specific embodiment is merely an explanation of the utility model, and it is not a limitation of the utility model. After reading this specification, those skilled in the art can make non-creative modifications to the embodiment as needed, but as long as it is within the protection scope of the utility model, it is protected by the patent law.

Claims

1. An opening and closing bridge expansion joint device, characterized in that: The invention comprises symmetrically arranged I-beams (1), two groups of connecting cavities (8) with rectangular longitudinal sections are provided on the facing surfaces of the I-beams, a steel saw blade (6) with saw teeth at the lower part, a pushable steel ball (5), a column steel (2) welded to the back surface of the I-beams, and a pentagonal column steel (4) hinged thereto; the connecting cavity penetrates the expansion joint I-beam (1) along the length direction of the expansion joint I-beam, and steel connecting balls are placed inside and welded to the steel plate.

2. The expansion joint device for a bridge according to claim 1, characterized in that: The lower portion of the steel saw blade has saw teeth, which are oriented inwards; the longitudinal section of the non-saw tooth portion is a right-angled trapezoid, and the shorter side is in contact with the steel ball (5); the steel saw blade (6) penetrates the center of the waist plate of the I-beam (1) in the width direction of the I-beam and can move in this direction.

3. The expansion joint device for a bridge according to claim 1, characterized in that: The column steel (2) is welded to the opposite back side of the I-beam (1), with two groups welded on each side; saw teeth are welded on the upper side of the column steel of the lower side group, which can be embedded with the saw teeth of the steel saw blade (6), and the saw teeth are directed outwards.

4. The expansion joint device for a bridge according to claim 1, characterized in that: The steel ball (5) is not welded to the steel saw blade (6), the column-shaped steel (2), and the pentagonal column-shaped steel (4); when the steel saw blade (6) is pushed outward, the steel ball can be pushed so that the pentagonal column-shaped steel is pushed to open.

5. The expansion joint device for a bridge according to claim 4, characterized in that: The inclined surface of the pentagonal prism column steel (4) is in tangential contact with the steel ball (5); the longitudinal section of the pentagonal prism column steel (4) is a right-angled trapezoid, and the angle between the inclined surface and the horizontal plane is slightly larger than the angle between the inclined surface of the bridge trench and the horizontal plane.

6. The expansion joint device for a bridge according to claim 1, characterized in that: There is a hollow space between the steel plate and the adjacent steel plate (11). After the steel saw blade (6) is pushed to complete the installation of the expansion joint device, concrete can be poured into the hollow portion between the steel plates (11).

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