Welding-free bridge expansion joint and expansion joint leveling device
Through the combination of welding-free bridge expansion joints and expansion joint leveling devices, the problems of complex welding connections and steel bar deformation in the prior art are solved, and precise leveling of bridge expansion joints and improvement of construction efficiency are achieved.
Patent Information
- Application Number
- CN202420843589.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-23
AI Technical Summary
During the construction of existing bridge expansion joints, due to the complex welding operation and the prone to deformation of the embedded steel bars, the construction difficulty increases, and the welding connection is inaccurate, which affects the construction efficiency.
Weld-free bridge expansion joints and special expansion joint leveling devices are used to form a rectangular frame structure through guide rails, booms and pipe levelers, and precise leveling of left and right expansion joint seats are achieved using booms and limit bayonets. , avoid welding connections and reduce construction difficulty.
Accurate leveling of bridge expansion joints is achieved, construction time is reduced, construction efficiency is improved, and complexity of welding connections and steel bar correction steps are avoided.
Smart Images
Figure CN222206016U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge construction, in particular to a welding-free bridge expansion joint, and also to an expansion joint leveling device specially used for the welding-free bridge expansion joint. Background Art
[0002] Bridge expansion joints are important components of bridges. In the existing construction process, in order to ensure that the expansion joint is firmly connected to the bridge deck concrete, the expansion joint is usually welded to the embedded steel bars of the bridge deck concrete slab first, and then the upper concrete is poured; the welding operation is relatively complicated, and because the embedded steel bars are often deformed by compression, the steel bars often need to be corrected before the expansion joint is welded. The steel bar correction not only increases the construction difficulty, but also makes it difficult to ensure accurate leveling during the expansion joint welding, resulting in the expansion joint construction not meeting the standards; in addition, the left and right expansion seat plates of the existing bridge expansion joints are usually welded together, and after the paving is completed, the left and right expansion seat plates need to be cut on site to separate them, which further increases the construction time of the bridge expansion joint and reduces the construction efficiency. Summary of the invention
[0003] The utility model aims to provide a welding-free bridge expansion joint to address the defects of the prior art, and also provides an expansion joint leveling device specially used for the welding-free bridge expansion joint.
[0004] In order to achieve the above purpose, the utility model can adopt the following technical solutions:
[0005] The expansion joint leveling device described in the utility model comprises a pair of guide rails arranged in parallel in the horizontal direction, the left and right ends of the two guide rails are respectively connected as a whole by a connecting cross brace horizontally passing through them, so as to form a leveling frame with a rectangular frame structure, and a tube leveler is arranged on the leveling frame; each of the guide rails is composed of a pair of square steel pipes arranged in parallel, the ends of the two square steel pipes are connected as a whole by a fixing rod, and a guide groove is formed between the two square steel pipes; a pair of hanging arms are slidably arranged in the guide groove, and the hanging arms are composed of hanging caps blocked on the two square steel pipes, and a hanging cap is provided on the upper side. The two square steel pipes are provided with a plurality of pairs of limit slots connected with the guide slots at even intervals along the length direction on the opposite inner walls thereof; the limit slots provided in pairs are adapted to be inserted with limit pins for blocking the boom; the limit pins are composed of pin caps blocked on the two square steel pipes and plug plates adapted to be inserted between the relative limit slots; each of the connecting cross braces is provided with a pair of lifting ears between the two guide rails, the lifting ears are provided with lifting ropes, and the ends of the four groups of lifting ropes away from the lifting ears are connected as a whole by a lifting ring.
[0006] Furthermore, pins for blocking the guide rails are inserted on the connecting cross braces located on the outer sides of the two guide rails, and the guide rails are blocked by the pins to prevent the guide rails from slipping off the connecting cross braces.
[0007] Furthermore, the tube level is in two groups, which are respectively arranged on the side walls of one of the guide rails and one of the connecting cross braces, so that it is possible to observe whether the two guide rails and the two connecting cross braces are level.
[0008] In addition, the utility model also relates to a welding-free bridge expansion joint used in conjunction with the expansion joint leveling device, the welding-free bridge expansion joint comprising a symmetrically arranged left expansion joint seat body and a right expansion joint seat body, the left and right expansion joint seat bodies are both step-shaped structures, and a hook groove compatible with the suspension arm of the expansion joint leveling device is opened on the outer longitudinal wall of the upper step of the left and right expansion joint seat bodies along the length direction, and a plurality of leveling support plates extending horizontally outward are evenly spaced along the length direction at the bottom of the lower step of the left and right expansion joint seat bodies, an expansion tube with the lower end fixed to the bridge deck concrete is vertically penetrated on the leveling support plate, an expansion screw is threadedly penetrated in the expansion tube, and a plurality of leveling gaskets for adjusting the height to keep the left and right expansion joint seats level are mounted on the expansion tubes located on the upper and lower sides of the leveling support plate.
[0009] The advantage of the utility model lies in that the left and right expansion joint seats of the welding-free bridge expansion joint can be easily lifted by the lifting arm on the expansion joint leveling device which can horizontally slide and adjust the position, thereby easily realizing the precise leveling of the welding-free bridge expansion joint with the cooperation of the tube leveler, and at the same time avoiding the use of welding connection between the left and right expansion joint seats and the embedded steel bars in the bridge deck concrete, which not only reduces the difficulty of paving the welding-free bridge expansion joint, but also can ensure that the expansion joint construction meets the standards under the precise leveling action of the expansion joint leveling device, thereby reducing the construction time of the bridge expansion joint and improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 The utility model is a schematic diagram of the structure of the expansion joint leveling device in a top view.
[0011] Figure 2 yes Figure 1 Longitudinal section of the middle boom.
[0012] Figure 3 yes Figure 2 Left view of .
[0013] Figure 4 yes Figure 1 Longitudinal section of the center limit pin.
[0014] Figure 5 yes Figure 4 Left view of .
[0015] Figure 6 It is a schematic diagram of the longitudinal section structure of the welding-free bridge expansion joint described in the utility model.
[0016] Figure 7 yes Figure 6 Top view of the bridge (bridge deck concrete is hidden). DETAILED DESCRIPTION
[0017] 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.
[0018] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0019] In addition, in the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0020] like Figure 1 As shown, the expansion joint leveling device described in the utility model includes a pair of guide rails 1 arranged in parallel along the horizontal direction, and the left and right ends of the two guide rails 1 are connected as a whole through a connecting cross brace 2 horizontally crossing them, thereby forming a leveling frame with a rectangular frame structure.
[0021] Specifically, each guide rail 1 is composed of a pair of parallel square steel pipes, so that a guide groove 3 is formed between the two square steel pipes. In order to ensure that the width of the guide groove 3 is always fixed, a fixing rod 4 should be set at the ends of the two square steel pipes, so that the two square steel pipes constituting the guide rail 1 are fixedly connected as a whole. A pair of suspension arms 5 are slidably arranged in each guide groove 3, such as Figure 2 , 3 As shown, the boom 5 is specifically composed of a cap 5.1 clamped on two steel pipes, and a hook 5.2 passing through the guide groove 3 from top to bottom, and the hook body at the lower end of the hook should be located below the guide rail 1.
[0022] On the opposite inner side walls of the two steel pipes constituting the guide rail 1, a plurality of pairs of limit snap-in openings 6 are evenly spaced along the length direction, and each pair of limit snap-in openings 6 are arranged opposite to each other and connected to the guide groove 3. The two limit snap-in openings 6 opened in pairs are adapted to be inserted with limit pins 7 for blocking the boom 5. Figure 4 , 5 As shown, the limit pin 7 is specifically composed of a pin cap 7.1 that is blocked on two steel pipes, and a plug plate 7.2 that is adapted to be inserted between a pair of relative limit snap-in openings 6; since two groups of booms 5 are slidably arranged on each guide groove 3, two groups of limit pins 7 are adapted to be inserted on each guide rail 1, and these two groups of limit pins 7 should be respectively located on the relatively outer sides of the two booms 5, thereby forming a limit block for the booms 5.
[0023] A pair of lifting ears 8 located between the two guide rails 1 are arranged on each connecting cross brace 2, and the lifting ears 8 on the two connecting cross braces 2 are symmetrically arranged. A lifting rope 9 is arranged on each lifting ear 8. The lifting rope 9 can be made of steel rope or fiber rope, as long as the diameter is 5-15mm, the tensile strength is ≥1000MPa, and the elongation at break is ≤5%. The ends of the four groups of lifting ropes 9 away from the lifting ears 8 are connected as a whole through a lifting ring 10 located just above the center of the leveling frame. The lifting ring 10 serves as a lifting point. When an upward pulling force is applied to it, the entire leveling frame can be lifted stably.
[0024] In addition, a tube level 11 is also provided on the leveling frame. The tube level 11 is generally provided in two groups, which are respectively provided on the side walls of one of the guide rails 1 and one of the connecting cross braces 2, so that it is possible to observe whether the two guide rails 1 and the two connecting cross braces 2 are level, thereby ensuring the levelness of the entire leveling frame.
[0025] Furthermore, in order to prevent the guide rails 1 and the connecting cross braces 2 constituting the leveling frame from falling apart, pins 12 for blocking the guide rails 1 can be inserted into the connecting cross braces 2 located outside the two guide rails 1, so that the guide rails 1 can be blocked by the pins 12 to prevent the guide rails 1 from slipping off the connecting cross braces 2.
[0026] In addition, the utility model also relates to a welding-free bridge expansion joint, which is hoisted and leveled using the above-mentioned expansion joint leveling device during actual paving. Specifically, Figure 6 , 7As shown, the welding-free bridge expansion joint comprises a symmetrically arranged left expansion joint seat body 13 and a right expansion joint seat body 14. Both the left expansion joint seat body 13 and the right expansion joint seat body 14 are step-shaped structures. A hook groove 15 is horizontally opened along the length direction on the outer longitudinal wall of the upper step of the left expansion joint seat body 13 and the right expansion joint seat body 14. The hook groove 15 should be able to be adapted and snap-fitted with the hook 5.2 of the boom 5; in addition, a plurality of horizontally spaced bottoms of the lower steps of the left expansion joint seat body 13 and the right expansion joint seat body 14 are evenly spaced along the length direction. The leveling support plate 16 extends outward, and is vertically penetrated by an expansion tube 18 whose lower end is fixed to the bridge deck concrete 17. An expansion screw 19 is threadedly penetrated inside the expansion tube 18. The expansion tubes 18 located on the upper and lower sides of the leveling support plate 16 are provided with a plurality of leveling gaskets 20 for adjusting the height so that the left expansion joint seat body 13 and the right expansion joint seat body 14 remain horizontal. The leveling gasket 20 is made of a metal-rubber composite material, with an inner core of Q460 high-strength steel and an outer layer of nitrile rubber or fluororubber with a thickness of 1-5 mm.
[0027] When in use, the positions of the four groups of hanging arms 5 on the two guide rails 1 are adjusted according to the spacing between the left expansion joint seat body 13 and the right expansion joint seat body 14, so that the hooks 5.2 at the lower ends of the two hanging arms 5 on each guide rail 1 are just stuck in the hook grooves 15 of the left expansion joint seat body 13 and the right expansion joint seat body 14 respectively, and four groups of limit pins 7 are inserted one by one into the limit snap-in holes 6 on the outer sides of the four groups of hanging arms 5, thereby limiting and blocking the hanging arms 5.
[0028] Then, the leveling frame is lifted by the lifting ring 10, so that the left expansion joint seat body 13 and the right expansion joint seat body 14 are lifted. Note that when lifting the left expansion joint seat body 13 and the right expansion joint seat body 14, a top rod can be placed horizontally between the two to prevent the left expansion joint seat body 13 and the right expansion joint seat body 14 from tilting during the lifting process, and the top rod can be taken out after the left expansion joint seat body 13 and the right expansion joint seat body 14 are put in place.
[0029] Afterwards, the left expansion joint seat body 13 and the right expansion joint seat body 14 are fixed to the bridge deck concrete 17 by means of the expansion tube 18 and the expansion screw 19. While fixing, the leveling gasket 20 can be increased or decreased according to the pipe leveler 11 on the guide rail 1 and the connecting cross brace 2, thereby easily achieving precise leveling of the welding-free bridge expansion joint. There is no need to weld the left expansion joint seat body 13 and the right expansion joint seat body 14 to the embedded steel bars in the bridge deck concrete 17, which not only reduces the difficulty of paving the welding-free bridge expansion joint, but also ensures that the expansion joint construction meets the standards under the precise leveling action of the expansion joint leveling device, thereby reducing the construction time of the bridge expansion joint and improving the construction efficiency.
Claims
1. An expansion joint leveling device, characterized in that: The invention comprises a pair of guide rails arranged in parallel in the horizontal direction, the left and right ends of the two guide rails are respectively connected as a whole through a connecting cross brace passing horizontally therethrough, so as to form a leveling frame with a rectangular frame structure, and a tube leveler is arranged on the leveling frame; each of the guide rails is composed of a pair of square steel pipes arranged in parallel, the ends of the two square steel pipes are connected as a whole through a fixing rod, and a guide groove is formed between the two square steel pipes; a pair of hanging arms are slidably arranged in the guide groove, and the hanging arms are composed of hanging caps blocked on the two square steel pipes, and hanging caps passing through the guide groove from top to bottom hook; a plurality of pairs of limit snap-in sockets connected with the guide grooves are evenly spaced on the relative inner side walls of the two pairs of square steel pipes along the length direction; the limit snap-in sockets opened in pairs are adapted to be inserted with limit pins for blocking the boom, and the limit pins are composed of pin caps blocked on the two square steel pipes, and plug plates adapted to be inserted between the relative limit snap-in sockets; each of the connecting cross braces is provided with a pair of lifting ears located between the two guide rails, and the lifting ears are provided with lifting ropes, and the ends of the four groups of lifting ropes away from the lifting ears are connected as a whole by a lifting ring.
2. The expansion joint leveling device according to claim 1, characterized in that: The connecting cross brace located outside the two guide rails is provided with a pin for blocking the guide rails.
3. The expansion joint leveling device according to claim 1, characterized in that: The tube levelers are in two groups, which are respectively arranged on the side walls of one of the guide rails and one of the connecting cross braces.
4. A welding-free bridge expansion joint, characterized in that: It comprises a symmetrically arranged left expansion joint seat body and a right expansion joint seat body, both of which are step-shaped structures, and a hook groove adapted to the suspension arm of the expansion joint leveling device according to claim 1 is opened on the outer longitudinal wall of the upper step of the left and right expansion joint seat bodies along the length direction, and a plurality of leveling support plates extending horizontally outward are evenly spaced along the length direction at the bottom of the lower step of the left and right expansion joint seat bodies, and an expansion tube with a lower end fixed to the bridge deck concrete is vertically penetrated on the leveling support plate, and an expansion screw is threadedly penetrated in the expansion tube, and a plurality of leveling gaskets for adjusting the height to keep the left and right expansion joint seat bodies horizontal are mounted on the expansion tubes located on the upper and lower sides of the leveling support plate.