Fabricated profile steel telescopic device

Abstract

The utility model belongs to the technical field of highway bridge expansion joint devices, and particularly relates to an assembly type profile steel expansion device which comprises a bridge body, an expansion mechanism, a cover plate, a connecting assembly and an embedded assembly. The number of the bridge bodies is two, the two bridge bodies are distributed in a clearance mode, the two bridge bodies are each provided with an embedded groove, an embedded assembly is arranged in each embedded groove, and the interiors of the embedded grooves are used for pouring concrete; the two cover plates are located above the two pre-buried grooves correspondingly, the telescopic mechanism is arranged between the two cover plates, and the two ends of the telescopic mechanism are connected with the inner side walls of the two cover plates correspondingly; the cover plate is detachably connected with the embedded assembly through the connecting assembly; according to the scheme, the maintenance and replacement period can be shortened, and the influence on traffic operation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of highway bridge expansion joint device, specifically relates to an assembled type steel expansion device. BACKGROUND

[0002] As an important part of modern transportation network, the structural integrity and functionality of bridges are crucial for ensuring traffic safety and enhancing driving comfort. With the increase of service life and traffic flow, bridge deformation occurs under the influence of temperature changes, load actions and other factors, which requires the introduction of effective expansion devices in bridge design to adapt to such deformation. Especially for small and medium span bridges, 80 type bridge steel expansion device is widely used due to its practicality and economy, and the application proportion is expected to exceed 60%. Such expansion joint device is mainly made of steel material, including C type, F type and E type steel, which provides corresponding bearing capacity according to different cross-sectional shape and area.

[0003] However, the traditional steel expansion device exposes a series of problems in the actual application process, which seriously affects the safety and service life of the bridge. The damage of transition section concrete is one of the common problems, as shown in Figure 8 The vibration caused by vehicle passing causes instantaneous and high-frequency impact force on the anchoring system of the expansion device and the transition section concrete, resulting in the separation of the anchoring device and the concrete and the final complete damage.

[0004] After the damage of the transition section concrete, it needs to be repaired and replaced, but the current repair process needs to completely remove all loose or damaged concrete parts and failed anchoring materials under the condition of closed traffic or traffic control, and then uniformly fill the prepared repair materials to the damaged area, ensure that the repair materials fully fill the cracks and gaps, and tightly combine with the surrounding concrete, after the repair work is completed, it also needs to wait for the concrete to reach the curing strength and carry out necessary testing and acceptance of the repair area, to ensure that the repair quality meets the requirements and restores normal use. The existing repair and replacement cycle is long, and frequent repair seriously affects the normal traffic operation, causing obvious traffic congestion. UTILITY MODEL CONTENTS

[0005] In order to solve the above technical problems, the utility model provides an assembled type steel expansion device to solve the problem of long existing repair and replacement cycle and frequent repair affecting normal traffic operation.

[0006] The technical scheme adopted by the utility model is as follows: an assembled type steel expansion device, comprising a bridge beam body, an expansion mechanism, a cover plate, a connecting assembly and a pre-buried assembly.

[0007] The bridge body is provided with two gap distribution, two bridge body are provided with embedded groove, the embedded groove is provided with embedded assembly, the embedded groove is used for pouring concrete;

[0008] The cover plate is provided with two and is located above two embedded grooves respectively, the telescopic mechanism is arranged between two cover plates, and two ends of the telescopic mechanism are connected with the inner side walls of the two cover plates respectively.

[0009] The cover plate is detachably connected with the embedded assembly through the connecting assembly.

[0010] Further, the embedded assembly comprises embedded steel bars and U-shaped rods;

[0011] The embedded steel bars are provided with a plurality of embedded steel bars, a plurality of embedded steel bars are arrayed along the length direction of the bridge body, a plurality of U-shaped rods are provided corresponding to the plurality of embedded steel bars, the embedded steel bars are fixedly connected in the embedded groove, a plurality of U-shaped rods are fixedly connected with the corresponding embedded steel bars respectively, the opening of the U-shaped rod faces upward, and the two ends of the U-shaped rod are fixedly connected with threaded barrels respectively, and the cover plate is threadedly connected with the threaded barrels through the connecting assembly.

[0012] Further, the connecting assembly comprises a rib plate and a bolt, the rib plate is provided with a plurality of rib plates corresponding to the plurality of U-shaped rods, the plurality of rib plates are arrayed along the length direction of the cover plate, the rib plate is fixedly installed at the bottom of the cover plate, the cover plate and the rib plate are provided with connecting through holes and connecting blind holes corresponding to the threaded barrels respectively, the connecting through holes and the connecting blind holes are communicated, and the lower end of the bolt penetrates the connecting through hole and the connecting blind hole in sequence and is threadedly connected with the threaded barrel.

[0013] Further, it further comprises a reinforcing assembly, and the reinforcing assembly comprises a plurality of reinforcing ribs;

[0014] The plurality of reinforcing ribs are fixedly connected on the embedded steel bars and the U-shaped rods along the length direction of the bridge body, and the plurality of reinforcing ribs are spaced apart along the width direction of the bridge body.

[0015] Further, the telescopic mechanism comprises a sealing rubber strip and a beam steel;

[0016] The sealing rubber strip and the beam steel are arranged along the length direction of the bridge body, the beam steel is provided with two, the sealing rubber strip is fixedly connected between the two beam steels, and the outer side walls of the two beam steels are fixedly connected with the cover plates on both sides respectively.

[0017] Further, the top of the bridge body is further paved with a paving layer, and the paving layer and the inner side wall of the embedded groove are provided with a partition plate.

[0018] Further, the upper surface of the cover plate is provided with a plurality of pull line grooves arranged along the width direction of the cover plate, and the pull line grooves are arranged along the length direction of the cover plate.

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

[0020] By adopting the mode that the telescopic mechanism is connected between the two cover plates as an assembly unit, and the cover plate and the pre-buried assembly in the pre-buried groove are detachably connected, the cover plate and the pre-buried assembly become a reliable whole, and the telescopic mechanism and the cover plate can be quickly installed and detached on the bridge beam body in the later period, the maintenance and replacement period is greatly shortened, the influence on traffic operation is reduced, especially in busy road sections or peak periods, traffic congestion caused by construction can be significantly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is partial structure schematic diagram (cover plate assembly state) of the utility model embodiment one;

[0022] Figure 2 It is partial structure schematic diagram (cover plate disassembly state) of the utility model embodiment one;

[0023] Figure 3 It is partial sectional view of the cover plate and the rib plate in the utility model embodiment one;

[0024] Figure 4 It is installation sectional view of the assembly type steel telescopic device in the utility model embodiment one;

[0025] Figure 5 It is installation structure schematic diagram of the formwork of rib plate groove in the utility model embodiment one;

[0026] Figure 6 It is partial structure schematic diagram of the utility model embodiment two;

[0027] Figure 7 It is installation sectional view of the assembly type steel telescopic device in the utility model embodiment two;

[0028] Figure 8 It is sectional view of the existing steel telescopic device installed on the bridge beam body in the background art;

[0029] The drawings are as follows:

[0030] Bridge beam body 1, pre-buried groove 11, paving layer 12, concrete 13, stay wire groove 14, expansion mechanism 2, sealing rubber strip 21, side beam profiled steel 22, cover plate 3, connecting through hole 31, connecting assembly 4, rib plate 41, bolt 42, connecting counterbore 43, nut 42', pre-buried assembly 5, pre-buried steel bar 51, U-shaped rod 52, threaded cylinder 53, screw rod 53', reinforcing rib 6, partition plate 7, rib plate groove forming template 8, forming plate 81, sliding column 82. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0032] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Example one:

[0035] As shown in Figures 1-4 A fabricated type steel expansion device, comprising a bridge beam body 1, an expansion mechanism 2, a cover plate 3, a connecting assembly 4 and a pre-buried assembly 5;

[0036] The bridge beam body 1 is provided with two and is distributed with gaps, two bridge beam bodies 1 are provided with pre-buried grooves 11, the pre-buried assembly 5 is arranged in the pre-buried groove 11, and the pre-buried groove 11 is used for pouring concrete 13; In this embodiment, the fiber concrete is poured, and the fiber material (such as steel fiber, glass fiber or polypropylene fiber) in the fiber concrete can effectively improve the tensile strength and toughness of the concrete 13, reduce the occurrence and development of cracks, and thus improve the integrity and stability of the bridge structure.

[0037] The cover plate 3 is provided with two and respectively located above two pre-buried grooves 11, the telescopic mechanism 2 is arranged between the two cover plates 3, and the two ends of the telescopic mechanism 2 are respectively connected with the inner side walls of the two cover plates 3;

[0038] The cover plate 3 is detachably connected with the pre-buried assembly 5 through the connecting assembly 4. Specifically, the cover plate 3 is arranged on the upper surface of the solidified concrete 13 in the pre-buried groove 11.

[0039] As a preferred scheme, the pre-buried assembly 5 includes a pre-buried steel bar 51 and a U-shaped rod 52.

[0040] The pre-buried steel bar 51 is provided with a plurality of pre-buried steel bars 51 which are arrayed along the length direction of the bridge beam body 1, the U-shaped rod 52 is provided with a plurality of U-shaped rods 52 corresponding to the plurality of pre-buried steel bars 51, the pre-buried steel bar 51 is fixedly connected in the pre-buried groove 11, the plurality of U-shaped rods 52 are respectively fixedly connected with the corresponding pre-buried steel bars 51, the opening of the U-shaped rod 52 faces upward, and the two ends of the U-shaped rod 52 are respectively fixedly connected with threaded barrels 53, the cover plate 3 is threadedly connected with the threaded barrels 53 through the connecting assembly 4, and specifically, an internal thread hole is formed in the threaded barrel 53. The pre-buried steel bar 51 is arrayed along the length direction of the bridge beam body 1 and fixedly connected in the pre-buried groove 11, thereby providing basic support for the whole structure, the U-shaped rod 52 of the U-shaped sleeve is welded with the pre-buried steel bar 51 of the bridge beam body 1, thereby enhancing the stability of the whole structure.

[0041] As a preferred embodiment, the connecting component 4 includes a rib plate 41 and a bolt 42. Specifically, the bolt 42 is an internal hex bolt 42. Several rib plates 41 are provided corresponding to several U-shaped rods 52. Several rib plates 41 are arranged in an array along the length direction of the cover plate 3. The rib plates 41 are fixedly installed at the bottom of the cover plate 3. The rib plates 41 enhance the overall rigidity and strength of the cover plate 3 and also provide an installation base for the bolt 42. The cover plate 3 and the rib plate 41 are respectively provided with a connecting through hole 31 and a connecting countersunk hole 43 corresponding to the threaded cylinder 53. The connecting through hole 31 communicates with the connecting blind hole. The lower end of the bolt 42 passes through the connecting through hole 31 and the connecting countersunk hole 43 in sequence and is threadedly connected to the threaded cylinder 53. Specifically, when the cover plate 3 is detachably connected to the bridge beam 1, the head of the bolt 42 is located within the connecting through hole 31, and the top of the bolt 42 is lower than the top of the cover plate 3. The connecting through hole 31 allows the head of the bolt 42 to be fully embedded within it, while the connecting countersunk hole 43 provides a deeper space for the bolt 42 to pass through and securely connect with the threaded cylinder 53 below. When the cover plate 3 is detachably connected to the bridge beam 1, the head of the bolt 42 is located within the connecting through hole 31, and the top of the bolt 42 is lower than the top of the cover plate 3. This ensures a flat surface and does not affect traffic. The cover plate 3 is threadedly connected to the threaded cylinder 53 on the U-shaped rod 52 via hexagonal socket bolts 42, allowing the cover plate 3 to be securely installed above the bridge beam 1, while allowing for quick disassembly and reinstallation when needed, facilitating later maintenance and replacement.

[0042] like Figure 7 As shown, in this embodiment, during the pouring of concrete 13, since it is necessary to reserve a groove for the rib plate 41 at the bottom of the cover plate 3 to facilitate the detachable connection of the bolt 42 and the threaded cylinder 53, and to ensure that the internal thread hole of the threaded cylinder 53 does not seep into the concrete 13, a pouring template needs to be installed before pouring concrete 13. The pouring template includes several rib plate groove forming templates 8, and several rib plate groove forming templates 8 are provided corresponding to several rib plates 41 at the bottom of the cover plate 3. Specifically, the rib plate groove forming template 8 includes a forming plate 81 and sliding columns 82. Two sliding columns 82 are fixedly connected to the bottom of the forming plate 81. Two threaded cylinders 53 connected to the upper end of the U-shaped rod 52, corresponding to the sliding column 82, are set at the bottom of the forming plate 81. The shape of the forming plate 81 is adapted to the rib plate 41 to form the rib plate 41 groove in the concrete 13. When installing the rib plate groove forming template 8, the two sliding columns 82 at the bottom of the forming plate 81 are slidably sleeved in the internal threaded hole of the threaded cylinder 53, so that the bottom of the forming plate 81 abuts against the top of the threaded cylinder 53. After the curing time of the concrete 13 reaches the expected strength, the template is removed. Then the cover plate 3 with the telescopic mechanism 2 is detachably connected to the threaded cylinder 53 by bolts 42 for easy subsequent disassembly and assembly.

[0043] In addition, the pouring formwork further comprises an isolation formwork arranged between the gaps between the two bridge bodies, and the isolation formwork arranged between the gaps between the two bridge bodies is arranged when the concrete is poured, so that the concrete is prevented from flowing into the gaps, and the gaps between the two bridge bodies are ensured.

[0044] As a preferred solution, the reinforcing assembly comprises a plurality of reinforcing bars 6;

[0045] The plurality of reinforcing bars 6 are fixedly connected to the embedded steel bars 51 and the U-shaped bars 52 along the length direction of the bridge body 1, and the plurality of reinforcing bars 6 are spaced apart along the width direction of the bridge body 1.

[0046] In the embodiment, the embedded steel bars 51 are inverted U-shaped structures, the openings of the embedded steel bars 51 face downward, the lower ends of the embedded steel bars 51 penetrate into the bridge body 1 and are fixedly connected to the bridge body 1, the upper parts of the embedded steel bars 51 are welded to the lower parts of the U-shaped bars 52, the reinforcing bars 6 are provided with four reinforcing bars, two of which are fixedly connected to the outer side walls of the embedded steel bars 51 and the U-shaped bars 52, and the other two are fixedly connected to the top of the embedded steel bars 51 and the inner bottom wall of the U-shaped bars 52, and play a reinforcing and supporting role on the plurality of arrayed embedded steel bars 51 and U-shaped bars 52. By fixedly connecting the reinforcing bars 6 between the embedded steel bars 51 and the U-shaped bars 52, the rigidity and strength of the overall structure are enhanced, and for the bridge expansion device subjected to high-frequency vibration and impact force, this design can effectively disperse stress and reduce damage caused by local stress concentration, and the load generated when the vehicle passes through the bridge can be more evenly distributed to the bridge body 1 through the reinforcing bars 6, thereby reducing the risk of single-point overload.

[0047] As a preferred solution, the expansion mechanism 2 comprises a sealing strip 21 and a beam steel 22;

[0048] The sealing strip 21 and the beam steel 22 are arranged along the length direction of the bridge body 1, the beam steel 22 is provided with two, the sealing strip 21 is fixedly connected between the two beam steels 22, and the outer side walls of the two beam steels 22 are fixedly connected to the cover plates 3 on the two sides. The beam steel not only provides rigid support for the entire expansion device, but also can bear the vehicle load and effectively transmit these loads to the lower structure, the combination of the beam steel 22 and the sealing strip 21 forms an expansion system, which not only ensures the safety and stability of the bridge structure, but also meets the expansion demand of the bridge caused by environmental factors. When the bridge expands or shrinks due to heat, the beam steel 22 allows a certain degree of relative movement, and the sealing strip 21 maintains good sealing performance to prevent external substances from entering.

[0049] As a preferred solution, the top of the bridge beam body 1 is also paved with a pavement layer 12, and the pavement layer 12 and the inner side wall of the embedded groove 11 are provided with a partition plate 7. The pavement layer 12 is an asphalt pavement layer 12, and the partition plate 7 is arranged in advance before pouring the concrete 13 to protect the isolation effect between the asphalt pavement layer 12 and the concrete 13, thereby avoiding problems such as sinking of the tooth plate caused by non-compaction of the lower concrete 13 during vibration, and the partition plate 7 also has a waterproof effect, preventing water from penetrating into the embedded groove 11, thereby preventing rusting of the steel bars. Specifically, the inner side wall of the partition plate 7 is arrayed with a plurality of anchor bolts in the length direction of the embedded groove 11, and the anchor bolts increase the bonding force between the partition plate 7 and the concrete 13, so that the partition plate 7 is more stable and is not easy to loosen or fall off due to external vibration and other factors.

[0050] As a preferred solution, the upper surface of the cover plate 3 is provided with a plurality of pull line grooves 14 arrayed in the width direction of the cover plate 3, and the plurality of pull line grooves 14 are arranged in the length direction of the cover plate 3. In this embodiment, the plurality of pull line grooves 14 are arranged in the length direction of the cover plate 3 and penetrate through both ends of the cover plate 3. By arranging the pull line grooves 14, rainwater or other liquids can be quickly discharged along the direction of the grooves, thereby avoiding the phenomenon of water accumulation, and especially during heavy rain or snowmelt, this design can effectively prevent water from being retained on the surface of the cover plate 3, thereby reducing the influence on the bridge structure and driving safety; in addition, by arranging a plurality of arrayed pull line grooves 14, the friction is improved, which provides better grip for vehicles when passing through the expansion joint, and especially when a vehicle suddenly brakes when driving to the expansion joint under wet and slippery conditions (such as rainy days, snowy weather), the safety and stability of driving can be significantly improved.

[0051] The working mode of the utility model is as follows:

[0052] In use, the partition plate 7 is embedded in advance before pouring the concrete 13 to isolate and protect the asphalt pavement layer 12 from the concrete 13, and after the embedded steel bars 51, the U-shaped rods 52, the threaded barrels 53 and the reinforcing bars 6 in the embedded groove 11 are welded, the pouring formwork of the concrete 13 is installed, the concrete 13 is poured into the embedded groove 11, the pouring formwork is removed after the concrete 13 is formed, the cover plate 3 with the expansion mechanism 2 is threadedly connected to the threaded barrels 53 on the U-shaped rods 52 through the bolts 42, so that the cover body and the threaded barrels 53 become a reliable whole, and the expansion mechanism 2 and the cover plate 3 can be quickly installed and disassembled on the road surface in the later period.

[0053] Embodiment two:

[0054] Embodiment two is basically as shown in the accompanying drawings: Figure 5 and Figure 6

[0055] ​Embodiment two has the same features as embodiment one, and the difference is that in embodiment two, the embedded component 5 comprises embedded steel bars 51 and U-shaped rods 52;

[0056] The embedded steel bars 51 are provided with a plurality of embedded steel bars 51 which are arrayed along the length direction of the bridge beam body 1, the U-shaped rods 52 are provided with a plurality of U-shaped rods 52 corresponding to the plurality of embedded steel bars 51, the embedded steel bars 51 are fixedly connected in the embedded groove 11, the plurality of U-shaped rods 52 are respectively fixedly connected with the corresponding embedded steel bars 51, the opening of the U-shaped rod 52 faces upward, and the two ends of the U-shaped rod 52 are respectively fixedly connected with screw rods 53'.

[0057] The connecting assembly 4 comprises a plurality of rib plates 41 corresponding to the plurality of U-shaped rods 52 and a plurality of nuts 42', the plurality of rib plates 41 are arrayed along the length direction of the cover plate 3, the rib plates 41 are fixedly installed at the bottom of the cover plate 3, the cover plate 3 and the rib plates 41 are respectively provided with connecting through holes 31 and connecting counterbores 43 corresponding to the threaded barrels 53, the connecting through holes 31 are communicated with the connecting blind holes, the upper ends of the screw rods 53' pass through the connecting counterbores 43 and the connecting through holes 31 in sequence and extend into the connecting through holes 31 and are threadedly connected with the nuts 42', and specifically, when the cover plate 3 is threadedly connected above the bridge beam body 1, the screw rods 53' are provided with gaskets, the bottom of the gasket abuts against the inner bottom wall of the connecting counterbores 43, and the bottom of the nut 42' abuts against the top of the gasket. The detachable connection between the cover plate 3 and the embedded component 5 is realized through the threaded connection between the nut 42' and the screw rod 53' at the upper end of the U-shaped rod 52, and the connecting structure is simple and easy to disassemble and assemble.

[0058] The utility model is introduced in detail above. The description of the specific embodiment is only used for helping understanding the method and the core idea of the utility model. It should be pointed out that for ordinary skilled person in the art, without departing from the principle of the utility model, the utility model can be improved and modified in many ways, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A fabricated telescopic device for steel shapes, characterized by: It include bridge beam body (1), telescopic mechanism (2), cover plate (3), connecting assembly (4) and pre-embedded assembly (5); Two bridge beam bodies (1) are provided with pre-embedded slots (11), and the pre-embedded slots (11) are provided with pre-embedded assemblies (5) for pouring concrete (13); The cover plate (3) is provided with two and is located above two pre-embedded slots (11), and the telescopic mechanism (2) is arranged between the two cover plates (3), and the two ends of the telescopic mechanism (2) are connected with the inner side walls of the two cover plates (3) respectively. The cover plate (3) is detachably connected with the pre-embedded assembly (5) through the connecting assembly (4).

2. The assembled type steel telescopic device according to claim 1, characterized in that: The pre-embedded assembly (5) includes pre-embedded steel bars (51) and U-shaped rods (52); The pre-embedded steel bars (51) are arranged in an array along the length direction of the bridge beam body (1), and the U-shaped rods (52) are correspondingly arranged in an array along the length direction of the bridge beam body (1).

3. The assembled type steel telescopic device according to claim 2, characterized in that: The connecting assembly (4) includes a rib plate (41) and a bolt (42), the rib plate (41) is correspondingly arranged in an array along the length direction of the cover plate (3), and the rib plate (41) is fixedly installed on the bottom of the cover plate (3).

4. The assembled type steel telescopic device according to claim 2, characterized in that: It also includes a reinforcing assembly, and the reinforcing assembly includes a plurality of reinforcing ribs (6); The reinforcing ribs (6) are fixedly connected to the pre-embedded steel bars (51) and the U-shaped rods (52) along the length direction of the bridge beam body (1).

5. The assembled type steel telescopic device according to claim 1, characterized in that: The telescopic mechanism (2) includes a sealing rubber strip (21) and an edge beam steel (22); The sealing rubber strip (21) and the edge beam steel (22) are arranged along the length direction of the bridge beam body (1), and the edge beam steel (22) is provided with two sealing rubber strips (21) fixedly connected between the two edge beam steels (22).

6. The assembled type steel telescopic device according to claim 1, characterized in that: The top of the bridge beam body (1) is further provided with a paving layer (12), and the paving layer (12) and the inner side wall of the pre-embedded slot (11) are provided with a partition plate (7).

7. The assembled type steel telescopic device according to claim 1, characterized in that: The upper surface of the cover plate (3) is provided with a plurality of pull wire grooves (14) arranged along the width direction of the cover plate (3), and the plurality of pull wire grooves (14) are arranged along the length direction of the cover plate (3).

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