Bridge expansion joint notch protection device

Abstract

The utility model provides a bridge expansion joint notch protection device, and belongs to the field of bridge construction. The problem that the edges and corners of the asphalt surface layer at the notch kerf are prone to damage before concrete pouring is solved. The device comprises a positioning telescopic clamping sleeve, supporting rods are symmetrically arranged on the two sides of the positioning telescopic clamping sleeve, a protection assembly is arranged at the end, away from the positioning telescopic clamping sleeve, of each supporting rod, and the shape of each protection assembly is matched with an asphalt corner angle formed after an expansion joint is cut; the buffer pad is arranged between the protection assembly and the asphalt corner angle; the warning assemblies are arranged on the protection assemblies in a one-to-one correspondence mode and used for warning constructors. The device is mainly used for the expansion joint notch.

Description

Technical Field

[0001] The utility model belongs to the field of bridge construction, in particular to a bridge expansion joint notch protection device. Background Art

[0002] Bridge expansion joints should be set at each joint of the bridge to be used for thermal barrier and contraction of the bridge deck under temperature difference operation. During the construction of bridge expansion joints, the expansion joint slots within the designed width are first cut into vertical fractures by a cutting machine, and then steel bars are tied in the fractures, expansion devices are installed, expansion joint concrete is poured, and expansion comb steel plates are installed. After the slits are cut, the cross-section structural layers are the upper and lower layers of the asphalt pavement, the concrete bridge deck pavement layer, and the lower prefabricated beams or cast-in-place beams. After the slits are cut, the upper asphalt layer is exposed. The subsequent cleaning of the asphalt in the slots, the roughening of the concrete, the installation and welding of steel bars, and the pre-assembly of the expansion device may damage the edges and corners of the asphalt surface layer. This damage is irreversible and cannot be repaired. It can only be repaired once with expansion joint concrete. After the road is opened to traffic, due to its small size and asphalt stratification, the damaged part will continue to break due to the action of vehicle loads, causing potholes and damage. The potholes will continue to expand, affecting the quality of the expansion joint, posing a safety hazard to driving, reducing the usable area of ​​the expansion joint, and making subsequent maintenance and reinforcement difficult.

[0003] Therefore, in the construction of expansion joints, how to ensure that the edges and corners of the asphalt surface layer at the groove cut are intact before pouring concrete is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0004] In view of this, the utility model aims to provide a bridge expansion joint notch protection device to solve the problem that the corners of the asphalt surface layer at the notch cut are easily damaged before pouring concrete.

[0005] To achieve the above purpose, the utility model adopts the following technical solution: a bridge expansion joint notch protection device, comprising:

[0006] Positioning telescopic ferrule, with support rods symmetrically arranged on both sides, each support rod is provided with a protective component at one end away from the positioning telescopic ferrule, and the shape of the protective component is adapted to the asphalt edges and corners after the expansion joint is cut;

[0007] A buffer pad is provided between the protective component and the asphalt corners;

[0008] The warning components are arranged one by one on each of the protection components to warn the construction personnel.

[0009] Furthermore, the positioning telescopic sleeve is columnar as a whole and has slots on both side end faces, and each support rod is connected in the slot and fixed by a limiting assembly.

[0010] Furthermore, the limiting assembly includes a nut and a second screw rod, the nuts are symmetrically arranged on both sides of the positioning telescopic sleeve, the axis of the nut is arranged perpendicular to the axis of the positioning telescopic sleeve, and each nut is connected to a second screw rod, and the second screw rod is used to push against the peripheral wall of the support rod on the corresponding side after tightening.

[0011] Furthermore, the positioning telescopic sleeve is provided with a first screw hole for installing a nut.

[0012] Furthermore, each of the protective components is provided with a support rod positioning slot, and one end of the support rod away from the positioning telescopic sleeve is engaged in the support rod positioning slot on the corresponding side.

[0013] Furthermore, the protective component is an angle iron.

[0014] Furthermore, the buffer pad is a rubber buffer pad.

[0015] Furthermore, both sides of the warning component are warning sign mounting surfaces, each of the warning sign mounting surfaces is provided with a warning reflective sticker, and an LED light strip is provided on the top of the warning component.

[0016] Furthermore, a light strip installation groove is arranged on the upper portion of the warning component, and the LED light strip is arranged in the light strip installation groove and is pressed by a light strip pressure strip.

[0017] Furthermore, the light strip pressure strip is connected to the upper end surface of the warning component through a first screw rod.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. This device fixes the protective component by setting a positioning telescopic sleeve and cooperating with the support rod, so that it can meet a certain telescopic amount, and can provide good protection for the construction of expansion joints of different lengths, with strong adaptability and versatility;

[0020] 2. This device can protect the asphalt corners of the expansion joint after cutting through the protective components to prevent the corners from being damaged and causing cracks that cannot be repaired later;

[0021] 3. This device sets a buffer pad between the protective component and the asphalt corners, which can further improve the protection safety factor of the asphalt corners and has a positive protective significance for the asphalt corners;

[0022] 4. This device can display the position of the notch after cutting by setting a warning component and setting the warning component on the protective component. Through the setting of the reflective surface and the light strip, it can play a good warning role both during the day and at night, reminding construction workers to pay attention to construction safety and not to cause unnecessary damage to the notch. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the installation state of a bridge expansion joint notch protection device described in the utility model;

[0025] Figure 2 It is a schematic diagram of the matching relationship between the support rod and the positioning telescopic sleeve of the utility model;

[0026] Figure 3 It is a schematic diagram of the relative positions of the protection component and the warning component described in the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the warning component of the utility model;

[0028] Figure 5 This is a structural schematic diagram of the positioning telescopic sleeve described in the utility model;

[0029] Figure 6 It is a schematic longitudinal section diagram of the protection assembly described in the utility model;

[0030] Figure 7 This is a schematic diagram of the normal expansion joint completion;

[0031] Figure 8 This is a schematic diagram of the damage to the corners of the expansion joint groove after the device was not used for construction.

[0032] Protective component 1; support rod positioning slot 2; support rod 3; positioning telescopic sleeve 4; first screw hole 4-1; buffer pad 5; warning sign mounting surface 6; second screw hole 6-1; light strip mounting groove 7; LED light strip 8; first screw rod 9; light strip pressure strip 10; warning reflective sticker 11; nut 12; second screw rod 13. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely explain the technical solutions in the embodiments of the utility model. It should be noted that the embodiments and features in the embodiments of the utility model can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0034] It should be noted that the descriptions of the present invention regarding directions such as "left", "right", "left side", "right side", "upper", "lower", "top", "bottom", etc. are all defined based on the relationship between the orientations or positions shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure described must be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Referring to the accompanying drawings, this embodiment is described, a bridge expansion joint notch protection device comprises:

[0037] The positioning telescopic sleeve 4 has support rods 3 symmetrically arranged on both sides, and each support rod 3 is provided with a protective component 1 at one end away from the positioning telescopic sleeve 4, and the shape of the protective component 1 is adapted to the asphalt edges and corners after the expansion joint is cut; by providing the positioning telescopic sleeve 4 and providing support rods 3 on both sides thereof, the support rods 3 can push the protective components 1 on both sides against the asphalt edges and corners with the help of the positioning telescopic sleeve 4, thereby protecting the asphalt edges and corners, and by designing the reasonable length of the positioning telescopic sleeve 4 and the support rod 3, the cooperation of the two can adaptively install expansion joint slots of different specifications and protect the asphalt edges and corners through the protective component 1, and has strong adaptability and versatility.

[0038] The buffer pad 5 is arranged between the protective component 1 and the asphalt edges. The setting of the buffer pad 5 can fill and buffer the protective component 1 and the asphalt edges well, and prevent the protective component 1 from causing damage to the asphalt edges due to a rigid collision between the protective component 1 and the asphalt edges. According to actual needs, the buffer pad 5 needs to be arranged on all contacting planes between the protective component 1 and the asphalt edges, so as to achieve a good protective effect.

[0039] The warning components are arranged one by one on each of the protection components 1 to warn the construction personnel. The warning components are arranged to remind the operators to pay attention to the need to be extra careful when using the equipment to avoid irreparable defects caused by damage to the edges and corners.

[0040] In this embodiment, the positioning telescopic sleeve 4 is cylindrical as a whole and has slots on both side end faces, and each support rod 3 is connected in the slot and fixed by a limit assembly. Through the setting of the limit assembly, the relative position between the positioning telescopic sleeve 4 and the support rod 3 can be fixed, so that the positioning telescopic sleeve 4 and the support rods 3 on both sides can ensure good stability when supporting the protective components 1 on both sides as a whole. At the same time, thanks to the setting of the limit assembly, the relative fixed position between the positioning telescopic sleeve 4 and the support rods 3 on both sides can be adjusted, so that the device can adapt to notches of different specifications and increase adaptability.

[0041] In this embodiment, the limit assembly includes a nut 12 and a second screw rod 13. The nuts 12 are symmetrically arranged on both sides of the positioning telescopic sleeve 4. The axis of the nut 12 is arranged perpendicular to the axis of the positioning telescopic sleeve 4. A second screw rod 13 is connected to each nut 12. The second screw rod 13 is used to push against the peripheral wall of the support rod 3 on the corresponding side after tightening. The nut 12 can be connected in the form of welding or bonding, and the specific fixing form is not limited. Through the cooperation of the second screw rod 13 and the nut 12, the second screw rod 13 can be closer to or farther away from the support rod 3 along its axial direction. When it is close to and pushed against the support rod 3, it can fix the support rod 3, and when it is away, it can facilitate the disassembly of the support rod 3.

[0042] In this embodiment, the positioning telescopic sleeve 4 is provided with a first screw hole 4-1 for installing the nut 12. The first screw hole 4-1 provides a mounting position for the nut 12.

[0043] In this embodiment, each of the protective components 1 is provided with a support rod positioning slot 2, and the end of the support rod 3 away from the positioning telescopic sleeve 4 is engaged in the support rod positioning slot 2 on the corresponding side. The positioning slot 2 is provided to support the support rod 3, thereby avoiding the support rod 3 and the protective component 1 being set in an integrated form, which is convenient for disassembly and installation. At the same time, it is convenient for the device to be transported when it is not in working state, and the phenomenon that the protective component 1 is easily damaged in an integrated form is prevented. The slot of the support rod positioning slot 2 is arranged relative to the support rod 3, and the shape is adapted to the support rod 3 to ensure smooth installation.

[0044] In this embodiment, the protection component 1 is an angle iron. Angle iron is a common material for construction sites, has the advantages of low cost and good rigidity, is easy to obtain, and can be made and supplemented on site in case of loss, thereby increasing the versatility of the device.

[0045] In this embodiment, the buffer pad 5 is a rubber buffer pad. The rubber buffer pad has a certain buffering performance and a certain compression limit, which can play a buffering role while ensuring the stability of the support, so that the protection component 1 can continuously protect the edges and corners through the cooperation of the positioning telescopic sleeve 4 and the support rod 3, prevent rigid collision, and prevent connection failure.

[0046] In this embodiment, the two sides of the warning component are warning sign mounting surfaces 6, each of which is provided with a warning reflective sticker 11, and an LED light strip 8 is provided on the upper part of the warning component. The warning sign mounting surface 6 can be specifically set as an inclined plane, so that the warning reflective sticker 11 has a good viewing angle after being pasted, and can be more easily noticed by the operator. The setting of the LED light strip 8 makes it possible to have light that can be noticed by the operator at night when there is no light irradiating the warning reflective sticker 11, thereby playing a warning role. For the power supply of the LED light strip 8, a mobile power supply module or a fixed cable is used for power supply. The existing technology can be selected according to actual needs, and it will not be elaborated here.

[0047] In this embodiment, a light strip installation groove 7 is provided on the upper part of the warning component, and the LED light strip 8 is provided in the light strip installation groove 7 and is pressed by the light strip pressure strip 10. The setting of the light strip installation groove 7 provides a position for the installation of the LED light strip 8. At the same time, in order to ensure that the LED light strip 8 is firmly installed and not disturbed by external construction conditions, it is a more reliable installation method to close and install it in the light strip installation groove 7 through the light strip pressure strip 10, and the corresponding light strip pressure strip 10 should be set with a light-transmitting material.

[0048] In this embodiment, the light strip pressure strip 10 is connected to the upper end surface of the warning component through a first screw rod 9. The first screw rod 9 is used for installation. This connection method is simple, reliable, and easy to obtain. Specifically, a second screw hole 6-1 is provided on the upper end surface of the warning component. The first screw rod 9 completes the fixing of the light strip pressure strip 10 by cooperating with the second screw hole 6-1.

[0049] When in use, the actual working conditions and size requirements are used to illustrate the use status. After the asphalt pavement is paved and the conditions for the expansion joint construction are met, the construction workers use a cutting saw to cut out the asphalt notch. According to the size of the expansion joint model, the width of the comb plate expansion joint notch is generally 80-150cm, and the length is equal to the width of the bridge deck. Generally, there are many sizes such as 12.5m for half-width bridges;

[0050] This embodiment uses an expansion joint with a width of 120 cm and a length of 12 m as an example to explain the implementation method of this embodiment.

[0051] In order to facilitate transportation and installation, when the protective component 1 is used as an angle iron, it can be set in sections of 200cm in length. Two support rod positioning slots 2 are set on each 200cm section of the protective angle iron, and the positions are set 50cm inward from each end of the angle iron beam. The center spacing of the two support rod positioning slots 2 on the same angle iron is 100cm. When multiple 200cm protective angle iron devices are installed at the same time, ensure that the spacing between each support rod positioning slot 2 is 100cm. There is no strict technical restriction on the spacing between the two. The purpose is to support the protective angle iron so that it does not shift or deform and can be fixed on the edges and corners of the asphalt surface layer. The angle iron in this embodiment is made of 50×50mm, 3mm thick angle steel;

[0052] A buffer rubber pad 5 is pasted inside the angle iron. The rubber pad is made of elastic wear-resistant rubber with a thickness of 2mm. It is fully posted inside the briefing and can be pasted with a universal glue. The protective angle iron is welded to the support rod positioning slot 2. The positioning slot 2 is 40mm long, with an internal size of 25×35mm and is made of 2mm thick steel pipe. 35mm is the horizontal length and 25mm is the upper and lower height.

[0053] The support rod 3 is made of a steel pipe with a length of 45 cm, a cross-sectional size of 20×30 mm and a thickness of 2 mm.

[0054] A trapezoidal warning component is welded on the upper part of the angle iron. It is made of 2mm thick iron sheet and is shaped like Figure 4 As shown. Two second screw holes 6-1 are opened at the top, and the first screw rod 9 is used to fix the light strip pressure strip 10. The diameter of the second screw hole 6-1 is 4mm, and the first screw rod 9 is set corresponding to the diameter. The light strip pressure strip 10 is made of plastic, with a thickness of 2.5mm, a length that spans the second screw holes 6-1 on both sides, and a hole is opened at the end of the beam. A light strip installation groove 7 is set at the center of the top, and an LED light strip 8 is installed inside. The LED light strip 8 is not separated and is set in all 200cm protective angle iron grooves along the width of the road surface;

[0055] The length of the positioning telescopic sleeve 4 is 50 cm, and it is made of the same cross-section and material as the support rod positioning slot 2. Two 8mm first screw holes 4-1 are opened at a distance of 10 cm from the top. Two circular nuts 12 are set on the top of the small holes, and female threads are set inside to fix the second screw rod 13. The second screw rod 13 is equipped with a male thread on the outside, and the two support rods 3 are fixed by the tightening function of the screw rod.

[0056] Since the device has a telescopic function, it can be used for the construction and protection of expansion joints with a length of 90-140, which greatly increases the universal performance of the device.

[0057] When the grooving is completed, immediately install the protection components 1 on both sides, then install the support rod 3 on one side, and then install the positioning telescopic sleeve 4, move the positioning telescopic sleeve 4 close to one side, and then install the support rod 3 on the other side, and at the same time move the positioning telescopic sleeve 4 to the outside of the support rod 3 on the other side, insert the two support rods 3 into the positioning telescopic sleeve 4, first use the second screw rod 13 on one side to tighten the lower support rod 3, then tighten the support rod 3 on the other side, and then tighten the corresponding second screw rod 13 to achieve the purpose of fixing the protection component 1.

[0058] Protection component 1, after the fixing is completed, the workers need to clean the cement concrete in the groove, roughen the foundation surface, weld the steel bars in the groove, and pre-assemble the comb plate expansion device. The whole construction process will last for 5-7 days. There are many construction processes in the middle, and various types of work are cross-constructed, and laborers, steel workers, and expansion joint installation technicians pre-assemble. Because the edge strength of the upper layer of the asphalt concrete in the groove is very low, and because it has a lateral free surface, any trampling or bump will cause damage, so the protection of this device is very necessary.

[0059] When the comb plate is pre-assembled, remove the device before pouring concrete to pour the expansion joint concrete. Figure 7 The edges and corners are not damaged to achieve a satisfactory effect.

[0060] If no protective measures are taken within the length of 12m, there will be multiple damages of varying degrees. Figure 8 As shown in the effect, the patched concrete will be broken under the action of vehicle load, which will reduce the durability and service life of the beam expansion joint, increase maintenance costs, and bring serious negative social impacts.

[0061] The embodiments of the utility model disclosed above are only used to help explain the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model.

Claims

1. A bridge expansion joint notch protection device, characterized in that: include: A positioning telescopic sleeve (4) is provided with support rods (3) symmetrically arranged on both sides, and a protective component (1) is provided at one end of each support rod (3) away from the positioning telescopic sleeve (4), and the shape of the protective component (1) is adapted to the asphalt edges and corners after the expansion joint is cut; A buffer pad (5) is arranged between the protective component (1) and the asphalt corner; The warning components are arranged one by one on each of the protection components (1) to warn construction workers.

2. A bridge expansion joint notch protection device according to claim 1, characterized in that: The positioning telescopic sleeve (4) is columnar in shape as a whole and has two end faces provided with slots, and each support rod (3) is connected in the slot and fixed by a limiting assembly.

3. A bridge expansion joint notch protection device according to claim 2, characterized in that: The limiting assembly comprises a nut (12) and a second screw rod (13); the nuts (12) are symmetrically arranged on both sides of the positioning telescopic sleeve (4); the axis of the nut (12) is arranged perpendicular to the axis of the positioning telescopic sleeve (4); each nut (12) is connected to a second screw rod (13); the second screw rod (13) is used to be tightened and pushed against the peripheral wall of the support rod (3) on the corresponding side.

4. A bridge expansion joint notch protection device according to claim 3, characterized in that: The positioning telescopic sleeve (4) is provided with a first screw hole (4-1) for installing a nut (12).

5. A bridge expansion joint notch protection device according to claim 1, characterized in that: A support rod positioning slot (2) is provided on each of the protection components (1), and one end of the support rod (3) away from the positioning telescopic sleeve (4) is engaged in the support rod positioning slot (2) on the corresponding side.

6. A bridge expansion joint notch protection device according to claim 1, characterized in that: The protection component (1) is an angle iron.

7. A bridge expansion joint notch protection device according to claim 1, characterized in that: The buffer pad (5) is a rubber buffer pad.

8. A bridge expansion joint notch protection device according to claims 1-7, characterized in that: Both sides of the warning component are warning sign mounting surfaces (6), each of the warning sign mounting surfaces (6) is provided with a warning reflective sticker (11), and the upper part of the warning component is provided with an LED light strip (8).

9. A bridge expansion joint notch protection device according to claim 8, characterized in that: A light strip installation groove (7) is provided on the upper part of the warning component, and the LED light strip (8) is arranged in the light strip installation groove (7) and is pressed by a light strip pressure strip (10).

10. A bridge expansion joint notch protection device according to claim 9, characterized in that: The light strip pressure strip (10) is connected to the upper end surface of the warning component via a first screw rod (9).

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