Reinforced anchoring type F steel telescopic device and mounting method thereof

Abstract

The invention relates to the technical field of F-steel telescopic devices, in particular to a reinforced anchoring type F-steel telescopic device and a mounting method thereof.The reinforced anchoring type F-steel telescopic device comprises a bridge plate, a cast-in-place groove is formed in one side of the bridge plate and used for concrete pouring, and the reinforced anchoring type F-steel telescopic device further comprises an F-steel body, a waterproof rubber strip, a telescopic assembly and a mounting assembly. The contact area between the F steel body and concrete is increased through the slope structure on one side of the F steel body, the impact load borne by the concrete is reduced, the impact force direction is changed to be inclined downwards, the shear force between the F steel body and the concrete is reduced, and the protection effect can be achieved; and the detachable triangular plates are arranged to be used for fixing the two F steel bodies, so that position deviation can be prevented during installation, the convenience of installation operation is further improved, and the waterproof rubber strip is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of F-steel expansion and contraction devices, and in particular to a reinforced anchoring type F-steel expansion and contraction device and an installation method thereof. Background Art

[0002] Bridge expansion joints are a crucial structural device in bridge structures. Their core function is to accommodate the expansion and contraction deformation of the bridge superstructure caused by environmental changes and loads, ensuring structural safety, smooth driving, and extending the bridge's service life. The expansion joint refers to the entire assembly of components that make up a bridge expansion joint, including the steel frame, sealing strips, anchoring system, and displacement control mechanism. It is the core technical unit that realizes the expansion joint's function.

[0003] F-steel is a key component in expansion joints, serving as a connection for the rubber strips. F-steel is a hot-rolled steel section with an F-shaped cross-section, consisting of a transverse flange (upper flange), a vertical web, and a single short flange (lower flange). It is typically made of high-strength steel such as Q355B, with a tensile strength exceeding 470 MPa.

[0004] Existing F-steel expansion joints operate with forces acting perpendicularly on the concrete and F-steel. This not only results in poor anchoring performance, but also creates vibrations when vehicles pass through, which can easily cause cracks between the steel and concrete, and even lead to concrete breakage, shortening the lifespan of the expansion joint. Furthermore, most existing F-steel expansion joints require a connecting steel plate welded to the top of a pair of F-steels at the factory to prevent displacement during on-site installation. Furthermore, the installation process is complex, requiring the rubber strip to be pre-fixed between the two F-steels and then removed after installation. Sparks generated during the cutting process can easily damage the rubber strip. Summary of the Invention

[0005] The purpose of the present invention is to provide a reinforced anchor type F steel expansion device and an installation method thereof, which can change the force direction of concrete, avoid impact force damaging concrete, and can also be installed conveniently and quickly to prevent damage to the rubber strip.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A reinforced anchoring type F-steel expansion and contraction device is provided, comprising a bridge deck, a cast-in-place trough being provided on one side of the bridge deck for pouring concrete, an F-steel body, a waterproof rubber strip, an expansion and contraction assembly and an installation assembly. A groove is provided on one side of the F-steel body for snap-fitting with one side of the waterproof rubber strip, and the other side of the F-steel body is an inclined structure. The F-steel body is installed in the cast-in-place trough through the expansion and contraction assembly, and the installation assembly is detachably connected to the F-steel body for fixing the F-steel body to keep it stable.

[0008] Preferably, the number of bridge plates is a pair, two cast-in-place troughs are respectively opened on the opposite side of the two bridge plates, an expansion joint is left between the two bridge plates, the number of F steel bodies and the number of expansion components are both a pair, and the two F steel bodies are respectively installed in the two cast-in-place troughs and arranged relative to each other.

[0009] Preferably, the waterproof rubber strip includes a main body and a pair of auxiliary ears, the main body is a V-shaped structure, the auxiliary ears are a U-shaped structure, the tops on both sides of the main body are fixedly connected to one side of the tops of the two auxiliary ears, and the auxiliary ears are snap-fitted with the grooves.

[0010] Preferably, the top wall of the groove is fixedly connected with a protrusion, the top of the auxiliary ear is fixedly connected with a thickened portion, the thickened portion and the protrusion conflict with each other, and one side of the bottom of the auxiliary ear is fixedly connected with a spherical portion, which fits with one side of the F steel body.

[0011] Preferably, there are multiple telescopic components and they are distributed in horizontal intervals. The telescopic components include an anchor plate and an anchor ring. One side of the anchor plate is fixedly connected to the F steel body, and the other side of the anchor plate is fixedly connected to the anchor ring. The anchor plate and the anchor ring are both arranged vertically. A plurality of embedded reinforcements are fixedly connected to the bottom wall of the cast-in-place trough, and the embedded reinforcements are fixedly connected to the anchor ring. A pair of stirrups are arranged in the cast-in-place trough, and the stirrups pass through the embedded reinforcements and the anchor ring and are fixedly connected to them.

[0012] Preferably, the mounting assembly includes a pair of triangular plates, which are symmetrically arranged at both ends of the F steel body and in opposite directions. A plurality of plug rods are fixedly connected to one end of the triangular plates, and a pair of plug holes are provided at both ends of the F steel body. The plug rods on both sides of the triangular plates are respectively plugged into and matched with the plug holes on the two F steel bodies.

[0013] The present invention also provides an installation method for a reinforced anchor type F steel expansion device, comprising the following steps: step 1: fixing the embedded reinforcement to the bottom of the cast-in-place trough, welding the anchor plate to one side of the anchor ring opening, arranging the multiple anchor plates at intervals and vertically welding them to one side of the F steel body; step 2: placing the two F steel bodies at intervals relative to each other, then moving the two triangular plates to the two ends of the F steel body and placing them in reverse, inserting the rods at the two ends of the triangular plates into the sockets on the two F steel bodies respectively; step 3: synchronously moving the two F steel bodies to the expansion joint On both sides, weld the anchor rings and embedded reinforcement to each other, then pass the stirrups through the anchor rings and embedded reinforcement and weld them to them. Step 4: First, pass a steel wire rope horizontally through the inner wall of the auxiliary ear, move the waterproof rubber strip between the two F-steel bodies, and then pull the two ends of the steel wire rope diagonally upward to make the auxiliary ear fit into the groove on one of the F-steel bodies. Then move the steel wire rope to pass through the other auxiliary ear and repeat the pulling action to fit it into the groove on the other F-steel body. Step 5: Pour concrete into the cast-in-place trough. After the concrete solidifies, move the triangle plate to pull the rod out of the slot.

[0014] Beneficial effects of the present invention:

[0015] 1. The present invention increases the contact area between the F steel body and the concrete through the inclined structure on one side, thereby reducing the impact load per unit area of the concrete, and changes the transmission direction of the impact force from the horizontal direction to the downward direction, reducing the shear force between the F steel body and the concrete, which can play a protective effect and extend the service life of the telescopic device.

[0016] 2. The V-shaped structure of the waterproof rubber strip of this invention allows for significant deformation, increasing the operating range of the telescopic mechanism. The thickened portion at the top of the secondary ear and the protrusion on the top wall of the groove increase friction, further enhancing the securing effect of the waterproof rubber strip. The spherical portion at the bottom of the secondary ear ensures a perfect fit between the secondary ear and the inner wall of the groove, further enhancing the waterproofing effect. Furthermore, when removing and replacing the waterproof rubber strip, the spherical portion maintains the integrity of the secondary ear, preventing it from breaking and remaining in the groove.

[0017] 3. Before the F-shaped steel bodies leave the factory, the present invention places the two F-shaped steel bodies in a relative position, then inserts two triangle plates at opposite ends of the two F-shaped steel bodies. This prevents the two F-shaped steel bodies from shifting during installation. After the concrete solidifies, removal can be completed by simply pulling out the triangle plates, improving installation convenience and providing protection, further extending the service life of the telescopic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention Figure 1 .

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention Figure 2 .

[0021] Figure 3 It is a cross-sectional view of the bridge plate structure of the present invention.

[0022] Figure 4 It is a schematic structural diagram of the telescopic assembly of the present invention.

[0023] Figure 5 It is a disassembled diagram of the installation component structure of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the waterproof rubber strip of the present invention.

[0025] In the picture:

[0026] 1. Bridge deck; 10. Cast-in-place trough; 11. F-steel body; 110. Groove; 111. Protrusion; 112. Socket; 12. Waterproof rubber strip; 120. Main body; 121. Auxiliary lug; 122. Thickened portion; 123. Spherical portion; 13. Expansion joint; 14. Embedded reinforcement; 15. Stirrups;

[0027] 2. Telescopic assembly; 20. Anchor plate; 21. Anchor ring;

[0028] 3. Install the assembly; 30. Set square; 31. Insert the rod. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0030] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] In the description of the present invention, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0033] like Figures 1 to 6 As shown:

[0034] A reinforced anchoring type F steel telescopic device includes a bridge deck 1, a cast-in-place trough 10 is provided on one side of the bridge deck 1, and the cast-in-place trough 10 is used for pouring concrete. It also includes an F steel body 11, a waterproof rubber strip 12, a telescopic component 2 and an installation component 3. A groove 110 is provided on one side of the F steel body 11, and the groove 110 is snap-fitted with one side of the waterproof rubber strip 12. The other side of the F steel body 11 is a sloped structure. The F steel body 11 is installed in the cast-in-place trough 10 through the telescopic component 2. The installation component 3 is detachably connected to the F steel body 11 and is used to fix the F steel body 11 to keep it stable.

[0035] When installing the expansion joint, the F-steel body 11 is first installed within the cast-in-place trough 10 via the expansion assembly 2. Rolled concrete is then poured into the cast-in-place trough 10, positioning the F-steel body 11 on one side of the expansion joint 13 and embedded within the concrete. Finally, one end of the waterproof rubber strip 12 is secured to the groove 110 of the F-steel body 11 through vulcanization bonding. When a wheel passes through the expansion joint 13, impacting the F-steel body 11 is achieved by the inclined surface on one side of the F-steel body 11, increasing the contact area between it and the concrete. This reduces the impact load per unit area of the concrete and shifts the impact force from horizontal to downward, reducing the shear force between the F-steel body 11 and the concrete. This provides protection and extends the service life of the expansion joint.

[0036] like Figures 1 to 3 As shown:

[0037] The number of bridge decks 1 is a pair, and two cast-in-place troughs 10 are respectively opened on the opposite sides of the two bridge decks 1. An expansion joint 13 is left between the two bridge decks 1. The number of F steel bodies 11 and the number of expansion components 2 are both a pair. The two F steel bodies 11 are respectively installed in the two cast-in-place troughs 10 and arranged relative to each other.

[0038] A pair of F-steel bodies 11 are provided on both sides of the expansion joint 13, and the two F-steel bodies 11 are connected by a waterproof rubber strip 12. Under the influence of thermal expansion and contraction and external forces (wind load, etc.) of the bridge structure, the gap of the expansion joint 13 between the bridge decks 1 will increase or decrease, and the telescopic component 2 will also move accordingly. For example, in winter, the temperature drops and the bridge structure shrinks, and the telescopic components 2 on both sides move in opposite directions. The F-steel body 11 drives the waterproof rubber strip 12 to stretch to both sides, which can consume the travel of the bridge deck 1, and the waterproof rubber strip 12 tends to be horizontal, and the accumulated water is discharged, which can reduce the occurrence of accumulated water and freezing.

[0039] like Figures 3 to 6 As shown:

[0040] The waterproof rubber strip 12 includes a main body 120 and a pair of auxiliary ears 121. The main body 120 is a V-shaped structure, and the auxiliary ears 121 are a U-shaped structure. The tops on both sides of the main body 120 are fixedly connected to one side of the top of the two auxiliary ears 121 respectively, and the auxiliary ears 121 are snap-fitted with the groove 110.

[0041] A protrusion 111 is fixedly connected to the top wall of the groove 110, a thickened portion 122 is fixedly connected to the top of the auxiliary ear 121, the thickened portion 122 and the protrusion 111 conflict with each other, and a spherical portion 123 is fixedly connected to one side of the bottom of the auxiliary ear 121, and the spherical portion 123 fits together with one side of the F steel body 11.

[0042] During installation, the waterproof rubber strip 12 is quickly inserted into the groove 110 on the F-steel body 11 by threading a steel wire through the auxiliary ear 121 and pulling it diagonally upward. The V-shaped structure of the main body 120 allows for significant deformation, increasing the operating range of the telescopic mechanism. The thickened portion 122 at the top of the auxiliary ear 121 contacts the protrusion 111 on the top wall of the groove 110, increasing friction and further securing the waterproof rubber strip 12. Once the waterproof rubber strip 12 is installed, the spherical portion 123 at the bottom of the auxiliary ear 121 lies outside the groove 110 and mates with the F-steel body 11, ensuring a complete fit between the auxiliary ear 121 and the inner wall of the groove 110, further enhancing the waterproofing effect. To remove or replace the waterproof rubber strip 12, simply press the main body 120 downward to flip the auxiliary ear 121 downward and out of the groove 110. The spherical portion 123 maintains the integrity of the auxiliary ear 121, preventing it from breaking and remaining in the groove 110.

[0043] like Figures 1 to 4 As shown:

[0044] There are multiple telescopic components 2 and they are distributed in horizontal intervals. The telescopic components 2 include an anchor plate 20 and an anchor ring 21. One side of the anchor plate 20 is fixedly connected to the F steel body 11, and the other side of the anchor plate 20 is fixedly connected to the anchor ring 21. The anchor plate 20 and the anchor ring 21 are both arranged vertically. A plurality of embedded reinforcement bars 14 are fixedly connected to the bottom wall of the cast-in-place trough 10. The embedded reinforcement bars 14 are fixedly connected to the anchor ring 21. A pair of stirrups 15 are arranged in the cast-in-place trough 10. The stirrups 15 pass through the embedded reinforcement bars 14 and the anchor ring 21 and are fixedly connected to them.

[0045] The anchor plate 20 and the anchor ring 21 are arranged vertically to increase the contact area between them and the F steel body 11, thereby improving the fixing strength of the F steel body 11. The F steel body 11 and the embedded reinforcement 14 are connected by welding, and the F steel body 11 and the bridge deck 1 are fixedly connected again by concrete pouring, thereby further improving the installation strength of the F steel body 11 and extending its service life.

[0046] like Figures 1 to 5 As shown:

[0047] The mounting assembly 3 includes a pair of triangular plates 30, which are symmetrically arranged at both ends of the F steel body 11 and in opposite directions. A plurality of plug rods 31 are fixedly connected to one end of the triangular plate 30, and a pair of plug holes 112 are provided at both ends of the F steel body 11. The plug rods 31 on both sides of the triangular plate 30 are respectively plugged into and matched with the plug holes 112 on the two F steel bodies 11.

[0048] Before the F-steel bodies 11 leave the factory, they are spaced apart from each other. The two triangular plates 30 are then moved to opposite ends of the F-steel bodies 11 and placed in opposite directions. The rods 31 at each end of the triangular plates 30 are inserted into the sockets 112 on the two F-steel bodies 11. This secures the two F-steel bodies 11 relative to each other and prevents them from shifting during installation. After the concrete has solidified, removal can be completed by simply pulling out the triangular plates 30, eliminating the need for cutting and damaging the waterproof rubber strips 12. This improves ease of operation, provides protection, and further extends the life of the telescopic mechanism.

[0049] This embodiment also provides an installation method for a reinforced anchor-type F-steel expansion device, comprising the following steps: Step 1: fix the embedded reinforcement 14 to the bottom of the cast-in-place trough 10, weld the anchor plate 20 and the side of the opening of the anchor ring 21 to each other, arrange the multiple anchor plates 20 at intervals and vertically weld them to one side of the F-steel body 11; Step 2: place the two F-steel bodies 11 relatively spaced apart, then move the two triangular plates 30 to the two ends of the F-steel body 11 and place them in reverse, and insert the rods 31 at both ends of the triangular plates 30 into the sockets 112 on the two F-steel bodies 11 respectively; Step 3: synchronously move the two F-steel bodies 11 to both sides of the expansion joint 13, Weld the anchor ring 21 and the embedded reinforcement 14 to each other, and then pass the stirrups 15 through the anchor ring 21 and the embedded reinforcement 14 and weld them to them. Step 4: First, pass a steel wire rope horizontally through the inner wall of the auxiliary ear 121, move the waterproof rubber strip 12 between the two F steel bodies 11, and then pull the two ends of the steel wire rope obliquely upward to make the auxiliary ear 121 snap into the groove 110 on one of the F steel bodies 11, then move the steel wire rope to pass through the other auxiliary ear 121 and repeat the pulling action to snap it into the groove 110 on the other F steel body 11. Step 5: Pour concrete into the cast-in-place trough 10. After the concrete solidifies, move the triangular plate 30 to pull the insertion rod 31 out of the slot.

[0050] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are intended to be within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting; they are intended solely to facilitate a clear description of the positional relationships and functions of various components.

Claims

1. A reinforced anchor type F steel expansion device, comprising a bridge deck (1), a cast-in-place trough (10) being provided on one side of the bridge deck (1), the cast-in-place trough (10) being used for pouring concrete, characterized in that: The invention also includes an F steel body (11), a waterproof rubber strip (12), a telescopic component (2) and an installation component (3). A groove (110) is provided on one side of the F steel body (11). The groove (110) is engaged with one side of the waterproof rubber strip (12). The other side of the F steel body (11) is an inclined structure. The F steel body (11) is installed in the cast-in-place trough (10) through the telescopic component (2). The installation component (3) is detachably connected to the F steel body (11). The installation component (3) is used to fix the F steel body (11) to keep it stable.

2. A reinforced anchor type F steel expansion device according to claim 1, characterized in that: The number of bridge plates (1) is a pair, two cast-in-place troughs (10) are respectively opened on opposite sides of the two bridge plates (1), and an expansion joint (13) is left between the two bridge plates (1). The number of F steel bodies (11) and the number of expansion components (2) are both a pair, and the two F steel bodies (11) are respectively installed in the two cast-in-place troughs (10) and arranged relative to each other.

3. A reinforced anchor type F steel expansion device according to claim 1, characterized in that: The waterproof rubber strip (12) comprises a main body (120) and a pair of auxiliary ears (121), wherein the main body (120) is a V-shaped structure, and the auxiliary ears (121) are a U-shaped structure. The tops of both sides of the main body (120) are fixedly connected to one side of the tops of the two auxiliary ears (121), respectively, and the auxiliary ears (121) are snap-fitted with the grooves (110).

4. A reinforced anchor type F steel expansion device according to claim 3, characterized in that: The top wall of the groove (110) is fixedly connected to a protrusion (111), the top of the auxiliary ear (121) is fixedly connected to a thickened portion (122), the thickened portion (122) and the protrusion (111) are in contact with each other, and one side of the bottom of the auxiliary ear (121) is fixedly connected to a spherical portion (123), and the spherical portion (123) and one side of the F steel body (11) are in contact with each other.

5. The reinforced anchor type F steel expansion device according to claim 1, characterized in that: The number of telescopic components (2) is multiple and they are distributed at intervals horizontally. The telescopic components (2) include an anchor plate (20) and an anchor ring (21). One side of the anchor plate (20) is fixedly connected to the F steel body (11), and the other side of the anchor plate (20) is fixedly connected to the anchor ring (21). The anchor plate (20) and the anchor ring (21) are both vertically arranged. A plurality of embedded bars (14) are fixedly connected to the bottom wall of the cast-in-place trough (10). The embedded bars (14) are fixedly connected to the anchor ring (21). A pair of stirrups (15) are arranged in the cast-in-place trough (10). The stirrups (15) pass through the embedded bars (14) and the anchor ring (21) and are fixedly connected thereto.

6. The reinforced anchor type F steel expansion device according to claim 1, characterized in that: The mounting assembly (3) includes a pair of triangular plates (30), the two triangular plates (30) are symmetrically arranged at the two ends of the F steel body (11) and in opposite directions, one end of the triangular plate (30) is fixedly connected to a plurality of plug rods (31), and both ends of the F steel body (11) are provided with a pair of plug holes (112), and the plug rods (31) on both sides of the triangular plate (30) are respectively plugged into the plug holes (112) on the two F steel bodies (11).

7. The installation method of a reinforced anchor type F steel expansion joint according to any one of claims 1 to 5 is characterized in that: The following steps are included: Step 1: fix the embedded reinforcement (14) to the bottom of the cast-in-place trough (10), weld the anchor plate (20) and the side of the opening of the anchor ring (21) to each other, so that multiple anchor plates (20) are arranged at intervals and vertically welded to one side of the F steel body (11); Step 2: Place the two F-steel bodies (11) relatively spaced apart, then move the two triangular plates (30) to the two ends of the F-steel bodies (11) and place them in reverse, and insert the rods (31) at both ends of the triangular plates (30) into the sockets (112) on the two F-steel bodies (11); Step 3: Synchronously move the two F steel bodies (11) to both sides of the expansion joint (13), weld the anchor ring (21) and the embedded reinforcement (14) to each other, and then pass the stirrups (15) through the anchor ring (21) and the embedded reinforcement (14) and weld them to each other; Step 4: First, pass a steel wire rope horizontally through the inner wall of the auxiliary ear (121), move the waterproof rubber strip (12) between the two F steel bodies (11), and then pull the two ends of the steel wire rope obliquely upward to make the auxiliary ear (121) snap into the groove (110) on one of the F steel bodies (11), then move the steel wire rope so that it passes through the other auxiliary ear (121) and repeat the pulling action to snap it into the groove (110) on the other F steel body (11); Step 5: Pour concrete into the cast-in-place trough (10), and after the concrete solidifies, move the triangular plate (30) to pull the insertion rod (31) out of the slot.

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