A mounted bridge expansion joint

Abstract

The utility model discloses a kind of installation formula bridge expansion joint, including S-shaped steel sheet, vertical steel sheet, rubber belt, intermediate gap, the vertical steel sheet bottom is equipped with pre-burying mechanism, pre-burying mechanism is used to be fixedly connected with bridge;S-shaped steel sheet is fixed by connecting mechanism and is arranged at the top of vertical steel sheet, and intermediate gap is opened in S-shaped steel sheet, glue is equipped in intermediate gap, the bottom of S-shaped steel sheet is equipped with rubber belt, and pre-burying mechanism includes horizontal steel sheet;The side of vertical steel sheet is equipped with horizontal steel sheet, and reinforcing ring is equipped on horizontal steel sheet, and reinforcing ring is used to be pre-buried in bridge and be fixed by pouring concrete.The utility model is through the multiple-component cooperative structure design of pre-burying mechanism, effectively solve the technical problem that traditional bridge expansion joint pre-burying connection is not firm, installation process is complicated.

Description

Technical Field

[0001] This utility model relates to the field of bridge expansion joint technology, specifically an installable bridge expansion joint. Background Technology

[0002] Bridge expansion joints are expansion joints that are usually installed between the ends of two beams, between the beam end and the abutment, or at the hinged joint of the bridge to meet the requirements of bridge deck deformation. In order to meet the requirements of bridge deck deformation, expansion joints need to be installed at the joint of two bridges. Existing bridge expansion joints are generally composed of rubber strips, steel plates and sliding seats.

[0003] Bridge expansion joints are crucial components in bridge structures, designed to accommodate thermal expansion and contraction and buffer deformation. However, existing installed expansion joints still have several shortcomings in practical applications: First, the pre-embedded connection structure is simple in design, often using a single steel bar directly fixed to the bridge concrete, lacking supporting components for limiting and preventing displacement. Under long-term exposure to vehicle loads and deformation stress, these joints are prone to loosening and detachment, leading to failure in the connection between the expansion joint and the bridge structure. Second, the gaps in the expansion joint adaptation structure are mostly rigid gaps, lacking materials to accommodate thermal expansion and contraction, making it difficult to synchronously buffer the temperature deformation of the bridge. This can easily cause cracking at the bridge joint due to stress concentration. Furthermore, the sealing and protection structure is simplistic, allowing water, mud, and other impurities to easily penetrate the expansion joint, causing corrosion and jamming of components. This not only shortens the service life of the expansion joint but also significantly increases the later maintenance costs and frequency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an installable bridge expansion joint, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an installable bridge expansion joint, comprising an S-shaped steel plate, a vertical steel plate, a rubber strip, and a central gap. The bottom of the vertical steel plate is provided with a pre-embedded mechanism for fixed connection with the bridge. The S-shaped steel plate is set on the top of the vertical steel plate and fixed by a connecting mechanism. A central gap is opened on the S-shaped steel plate, and adhesive is provided in the central gap. A rubber strip is provided at the bottom of the S-shaped steel plate.

[0006] Furthermore, the pre-embedded mechanism includes a horizontal steel plate; a horizontal steel plate is provided on one side of the vertical steel plate, and a reinforcing ring is provided on the horizontal steel plate. The reinforcing ring is used to be pre-embedded in the bridge and fixed by concrete pouring.

[0007] Furthermore, the side wall of the transverse steel plate is provided with a through-hole, and the other end of the side wall of the transverse steel plate away from the through-hole is provided with a fixing plate, which is provided with a through hole.

[0008] Furthermore, one end of the steel ring is provided with a steel bar insert for inserting and rotating within the insertion hole.

[0009] Furthermore, a threaded rod is provided at the other end of the reinforcing ring, and a lower baffle is provided on the bottom of the reinforcing ring near the threaded rod.

[0010] Furthermore, the pre-embedded mechanism also includes a nut and an upper baffle; the top of the fixing plate is provided with an upper baffle, and the top of the upper baffle is provided with a nut, which is used to fix the threaded rod through threaded engagement, and an upper baffle is provided between the nut and the fixing plate.

[0011] Furthermore, the connecting mechanism includes bolt holes, plugs, and bolts; several bolt holes are provided on both the S-shaped steel plate and the vertical steel plate, and a reserved hole is provided on the upper part of the S-shaped steel plate near the bolt holes, which is used to insert bolts into the S-shaped steel plate and the vertical steel plate through the reserved hole and fix them together by thread engagement; a plug is provided above the reserved hole.

[0012] Furthermore, the adhesive in the intermediate gap is made of a material that expands and contracts with temperature.

[0013] Compared with existing technologies, this utility model has the following advantages: (1) This utility model effectively solves the technical problems of weak pre-embedded connection and complicated installation process of traditional bridge expansion joints by using a multi-component collaborative structure design of the pre-embedded mechanism. Specifically, the reinforcing bar ring is rotated and engaged with the transverse steel plate through the insertion hole of the reinforcing bar rod. Combined with the double limiting and fixing structure of the threaded rod, upper and lower baffles and nuts, it not only realizes the stable assembly of the reinforcing bar ring and the transverse steel plate, but also avoids the direct contact wear between the nut and the fixing plate through the upper baffle, thus improving the durability of the pre-embedded components.

[0014] (2) This utility model effectively improves the shortcomings of traditional expansion joints, such as poor adaptability to the thermal expansion and contraction deformation of bridges and easy internal corrosion and jamming, through the integrated design of expansion and contraction adaptation and sealing protection. Among them, the middle gap reserved in the S-shaped steel plate is filled with a rubber layer of thermal expansion and contraction material, which can simultaneously adapt to the expansion and contraction deformation of the bridge caused by temperature changes, buffer the stress concentration at the joint, and avoid cracking and damage caused by deformation misalignment between the bridge body and the expansion joint; at the same time, the rubber strip at the bottom of the S-shaped steel plate and the plug block at the bolt hole form a multi-seal structure, which can effectively prevent water, mud and other impurities from entering the interior of the expansion joint. Combined with the wear-resistant design of the pre-embedded mechanism, the probability of component corrosion and jamming is further reduced, significantly extending the overall service life of the expansion joint and reducing the frequency and cost of later maintenance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a bridge expansion joint for practical use.

[0016] Figure 2 This is a plan view of the bridge expansion joint structure for practical purposes.

[0017] Markings in the diagram: 1. S-shaped steel plate; 11. Bolt hole; 12. Block; 13. Bolt; 14. Reserved hole; 2. Vertical steel plate; 21. Horizontal steel plate; 22. Rebar ring; 23. Through-hole; 24. Rebar insert; 25. Lower baffle; 26. Fixing plate; 2601. Through hole; 27. Nut; 2701. Upper baffle; 28. Threaded rod; 3. Rubber band; 4. Intermediate gap. Detailed Implementation

[0018] like Figures 1-2 As shown; this utility model provides a technical solution: an installable bridge expansion joint, including an S-shaped steel plate 1, a vertical steel plate 2, a rubber strip 3, and an intermediate gap 4; the bottom of the vertical steel plate 2 is provided with a pre-embedded mechanism, which is used to fix it to the bridge; the S-shaped steel plate 1 is set on the top of the vertical steel plate 2 and fixed by a connecting mechanism, the intermediate gap 4 is opened on the S-shaped steel plate 1, the intermediate gap 4 is filled with adhesive, and the bottom of the S-shaped steel plate 1 is provided with a rubber strip 3.

[0019] The pre-embedded mechanism includes a horizontal steel plate 21; a horizontal steel plate 21 is provided on one side of the vertical steel plate 2, and a reinforcing ring 22 is provided on the horizontal steel plate 21. The reinforcing ring 22 is used to be pre-embedded in the bridge and fixed by concrete pouring.

[0020] The transverse steel plate 21 has an insertion hole 23 on its side wall, and a fixing plate 26 is provided on the other end of the side wall of the transverse steel plate 21 away from the insertion hole 23. The fixing plate 26 has a through hole 2601.

[0021] One end of the steel ring 22 is provided with a steel bar insert 24, which is used to rotate inside the insertion hole 23.

[0022] The other end of the reinforcing bar ring 22 is provided with a threaded rod 28. A lower baffle 25 is provided on the bottom of the reinforcing bar ring 22 near the threaded rod 28. The lower baffle 25 is used to allow the threaded rod 28 to pass through the through hole 2601 and contact the bottom of the fixing plate 26, so as to prevent the threaded rod 28 from moving upward.

[0023] The pre-embedded mechanism also includes a nut 27 and an upper baffle 2701. The top of the fixing plate 26 is provided with an upper baffle 2701, and the top of the upper baffle 2701 is provided with a nut 27, which is used to fix the threaded rod 28 through threaded engagement. The upper baffle 2701 is provided between the nut 27 and the fixing plate 26 to prevent the nut 27 from rotating downward and colliding with the top of the fixing plate 26, thus preventing wear.

[0024] The connecting mechanism includes bolt holes 11, plugs 12, and bolts 13. Several bolt holes 11 are provided on both the S-shaped steel plate 1 and the vertical steel plate 2. A reserved hole 14 is provided on the upper part of the S-shaped steel plate 1 near the bolt holes 11. The bolts 13 are inserted into the reserved hole 14 through the reserved hole and fixed by mutual engagement through the threads. A plug 12 is provided above the reserved hole 14.

[0025] The adhesive in the middle gap 4 is made of a material that expands and contracts with temperature. When the bridge expands and contracts due to temperature changes, the S-shaped steel plate can move slightly along the gap, and the adhesive layer expands and contracts synchronously. This ensures structural stability and buffers the stress caused by the bridge deformation. At the same time, the rubber strip 3 plays a role in waterproofing and dustproofing.

[0026] Working principle: To use the device, the bridge joint needs to be moved onto the bridge. One end of the reinforcing bar ring 22, the reinforcing bar insert 24, is inserted into the through-hole 23. The other end of the reinforcing bar ring 22 is rotated, causing the threaded rod 28 at the other end of the reinforcing bar ring 22 to pass through the through-hole 2601 of the fixing plate 26. The lower baffle 25 of the reinforcing bar ring 22 contacts the bottom of the fixing plate 26, preventing the threaded rod 28 from moving upwards. The upper baffle 2701 passes through the head of the threaded rod 28 and contacts the top of the fixing plate 26. Finally, the nut 27 is removed from the threaded rod... The head of 28 rotates from top to bottom and contacts the upper baffle 2701. The nut 27 and the threaded rod 28 are threaded together to fix the reinforcing ring 22. Next, the S-shaped steel plate 1 is placed above the vertical steel plate 2. The bolt holes 11 of the S-shaped steel plate 1 and the vertical steel plate 2 are aligned and the threads are screwed in to fix it. The reserved hole 14 is sealed by the plug block 12. After the bridge joint is assembled, the reinforcing ring 22 of the vertical steel plate 2 is placed at the bridge pre-embedded position and concrete is poured in to fix the bridge joint.

[0027] Although embodiments of the present utility have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present utility; the scope of the present utility is defined by the appended claims and their equivalents.

Claims

1. An installable bridge expansion joint, comprising an S-shaped steel plate, a vertical steel plate, a rubber strip, and an intermediate gap, characterized in that: The bottom of the vertical steel plate is provided with a pre-embedded mechanism for fixed connection with the bridge; the S-shaped steel plate is set on the top of the vertical steel plate and fixed by a connecting mechanism. The S-shaped steel plate has a middle gap with glue inside, and the bottom of the S-shaped steel plate is provided with a rubber strip.

2. The installed bridge expansion joint according to claim 1, characterized in that: The pre-embedded mechanism includes a horizontal steel plate; a horizontal steel plate is provided on one side of the vertical steel plate, and a reinforcing ring is provided on the horizontal steel plate. The reinforcing ring is used to be pre-embedded in the bridge and fixed by concrete pouring.

3. The installed bridge expansion joint according to claim 2, characterized in that: The side wall of the transverse steel plate has through holes, and the other end of the side wall of the transverse steel plate away from the through holes has a fixing plate with through holes.

4. The installed bridge expansion joint according to claim 3, characterized in that: One end of the steel ring is equipped with a steel bar insert, which is used to rotate through the insertion hole.

5. An installed bridge expansion joint according to claim 4, characterized in that: The other end of the reinforcing bar ring is provided with a threaded rod, and a lower baffle is provided on the bottom of the reinforcing bar ring near the threaded rod.

6. An installed bridge expansion joint according to claim 5, characterized in that: The pre-embedded mechanism also includes a nut and an upper baffle; the top of the fixing plate is provided with an upper baffle, and the top of the upper baffle is provided with a nut, which is used to fix the threaded rod through threaded engagement, and an upper baffle is provided between the nut and the fixing plate.

7. An installed bridge expansion joint according to claim 6, characterized in that: The connecting mechanism includes bolt holes, plugs, and bolts; several bolt holes are provided on both the S-shaped steel plate and the vertical steel plate, and a reserved hole is provided on the upper part of the S-shaped steel plate near the bolt holes, which is used to insert bolts into the S-shaped steel plate and the vertical steel plate through the reserved hole and fix them together by thread engagement. A plug is provided above the reserved hole.

8. An installed bridge expansion joint according to claim 7, characterized in that: The adhesive in the middle gap is made of a material that expands and contracts with temperature.

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