Bridge section steel expansion joint cleaning-free device
By filling the sealing material layer in the bridge expansion joint water stop, the expansion joint blockage problem caused by insufficient bridge maintenance staffing is solved, and the function of no regular cleaning is achieved, reducing maintenance costs and extending service life.
Patent Information
- Application Number
- CN202323579748.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-27
AI Technical Summary
Inadequate bridge maintenance staffing has led to the inability to clean the bridge expansion joints regularly, resulting in solid waste blockage, affecting the design function, and causing structural problems.
The sealed filling material layer is filled in the bridge expansion joint water stop, forming a groove cavity and poured in one piece with the expansion joint steel and foundation block, avoiding sediment deposition and gravel joints, and reducing maintenance workload and cost.
It effectively avoids sediment deposition and gravel cracks, reduces maintenance workload and expenses, extends service life, and improves the stability of the device through buffering effect and bonding strength.
Smart Images
Figure CN222160918U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of road construction materials and engineering, and particularly relates to a cleaning-free device for expansion joints of bridge steel sections. Background Art
[0002] The function of bridge expansion joints is to adjust the displacement and connection between the superstructure caused by vehicle loads and bridge construction materials. During operation, the expansion joints are required to be able to freely expand and contract in both directions parallel and perpendicular to the bridge axis, be firm and reliable, and be smooth without sudden jumps and noise when vehicles pass by; they must be able to prevent rainwater and garbage and soil from infiltrating and blocking; and they must be easy and convenient to install, inspect, maintain, and remove debris.
[0003] my country's bridge construction has made rapid progress. By the end of 2022, the number of highway bridges nationwide had reached 1.0332 million and 85.7649 million meters. The importance of bridge maintenance is becoming increasingly prominent.
[0004] Due to insufficient bridge maintenance personnel, it is difficult to regularly clean or promptly remove debris from all expansion joints of bridges within the jurisdiction, resulting in serious blockage of solid waste in the expansion joints. Ultimately, the expansion joints are unable to perform their designed functions, leading to structural problems such as breakage and falling of rubber waterstops, damage to the anchorage area, and squeezing of expansion joints to damage the back wall of the abutment. Utility Model Content
[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a cleaning-free device for bridge steel expansion joints. The device can deform in coordination with the steel expansion joints and does not require regular cleaning of the steel expansion joints without affecting normal design functions, thereby having the advantage of reducing maintenance costs.
[0006] The purpose of the utility model is achieved through the following technical scheme. The cleaning-free expansion joint device of the bridge steel comprises a foundation block and an expansion joint steel. The foundation block is a concrete block cast on a bridge or road. An expansion joint is arranged between adjacent foundation blocks, and each foundation block is provided with an expansion joint steel. Two expansion joint steels are relatively distributed. An expansion joint waterstop is installed between the two expansion joint steels. A groove cavity is formed between the expansion joint waterstop and the two expansion joint steels. The groove cavity is filled with a sealing filling material layer and is dense. The upper end surface of the sealing filling material layer, the upper end surface of the expansion joint steel and the upper end surface of the foundation block are all on the same plane.
[0007] The beneficial effects of the utility model are as follows: by filling a layer of sealing filling material in the waterstop strip of the bridge expansion joint, it is possible to effectively avoid sediment deposition and gravel jamming the joints without affecting the expansion effect. There is no need for manual regular cleaning of debris in the expansion joint, which effectively protects the steel expansion joint device, effectively reduces the daily maintenance workload and maintenance expenses of the bridge expansion joint, and extends its service life.
[0008] Preferably, one side surface of the foundation block is an L-shaped surface, and the expansion joint steel is placed on the L-shaped surface and cast integrally on the foundation block; by setting the L-shaped surface, the expansion joint steel can be placed on the foundation block, and the integral casting makes the connection stability between the two better.
[0009] Preferably, a 1 / 4 circular deformation cavity is provided on one side surface of the upper end of the expansion joint steel, and a thin plate is provided at the open end of the deformation cavity, and an interspersed seam is provided between the thin plate and the bottom of the open end of the deformation cavity; by providing the deformation cavity, the expansion joint steel can have a buffering effect when subjected to external force, and at the same time, the thin plate and the interspersed seam are provided to facilitate the installation of the expansion joint waterstop.
[0010] Preferably, both ends of the expansion joint waterstop pass through the through-slit and extend into the inner wall of the deformation cavity; thus, both ends of the expansion joint waterstop can be well fixed in the deformation cavity.
[0011] Preferably, the center of the expansion joint waterstop is concave; this facilitates the extrusion deformation of the expansion joint waterstop.
[0012] Preferably, the inner wall of the groove cavity is coated with an interface treatment agent layer, and the interface treatment agent layer is in contact with the sealing filling material layer; this enables the sealing filling material layer to form sufficient bonding strength with the expansion joint waterstop and expansion joint steel, and can prevent the sealing filling material layer from falling off.
[0013] Preferably, the interface treatment agent layer is epoxy glue or silicon PU glue, which has good adhesion and weather resistance.
[0014] Preferably, the sealing filling material layer is formed by mixing rubber particles and silicon PU glue in a mass ratio of 4.0-5.0:1.0; it has good sealing performance and good deformation and compression performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.
[0016] Figure 2 It is a schematic diagram of the plane structure of the utility model.
[0017] The numbers in the accompanying drawings are: 1. foundation block; 2. expansion joint steel; 3. expansion joint; 5. expansion joint waterstop; 6. sealing filling material layer; 7. interface treatment agent layer; 11. L-shaped surface; 21. deformation cavity; 22. thin plate; 23. interlaced joint. DETAILED DESCRIPTION
[0018] The following is a detailed introduction to the utility model in conjunction with the accompanying drawings: Figure 1 , 2 As shown, the utility model includes a foundation block 1 and an expansion joint steel 2, the foundation block 1 is a concrete block cast on a bridge or road, an expansion joint 3 is arranged between adjacent foundation blocks 1, and each foundation block 1 is provided with an expansion joint steel 2, and the two expansion joint steels 2 are relatively distributed, an expansion joint waterstop 5 is installed between the two expansion joint steels 2, a groove cavity is formed between the expansion joint waterstop 5 and the two expansion joint steels 2, the groove cavity is filled with a sealing filling material layer 6 and is dense, and the upper end surface of the sealing filling material layer 6, the upper end surface of the expansion joint steel 2 and the upper end surface of the foundation block 1 are all on the same plane.
[0019] The sealing filling material layer 6 is filled in the groove formed by the expansion joint water stop 5 and the expansion joint steel 2, so as to fill the expansion joint densely and prevent debris from entering and causing solid garbage blockage in the expansion joint. The expansion joint water stop 5 plays a supporting role for the sealing filling material layer 6. At the same time, when the expansion joint deforms and drives the expansion joint water stop 5 to deform, the sealing filling material layer 6 can follow the deformation and compression when the expansion joint deforms, leaving enough deformation margin for the groove deformation, and can always maintain the effective combination of the cleaning-free device and the expansion joint.
[0020] One side surface of the foundation block 1 is an L-shaped surface 11 , and the expansion joint steel 2 is placed on the L-shaped surface 11 and integrally cast on the foundation block 1 .
[0021] A 1 / 4 circular deformation cavity 21 is provided on one side surface of the upper end of the expansion joint steel 2, and a thin plate 22 is provided at the open end of the deformation cavity 21, and an interlaced seam 23 is provided between the thin plate 22 and the bottom of the open end of the deformation cavity 21.
[0022] Both ends of the expansion joint water stop 5 pass through the through-slit 23 and extend into the inner wall of the deformation cavity 21 .
[0023] The center of the expansion joint waterstop 5 is concave.
[0024] The inner wall of the groove cavity is coated with an interface treatment agent layer 7, and the interface treatment agent layer 7 is in contact with the sealing filling material layer 6. The interface treatment agent layer 7 is arranged on the surface of the expansion joint water stop 5 and the expansion joint profile steel 2 to enhance the bonding strength with the sealing filling material layer 6.
[0025] The interface treatment agent layer 7 is epoxy glue or silicon PU glue.
[0026] The sealing filling material layer 6 is formed by mixing rubber particles and silicon PU glue in a mass ratio of 4.0-5.0:1.0.
[0027] The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in shape or material composition, any structural design provided by the present invention is a variation of the present invention and should be considered within the protection scope of the present invention.
Claims
1. A cleaning-free device for expansion joints of bridge steel, comprising a foundation block (1) and expansion joint steel (2), characterized in that: The foundation block (1) is a concrete block cast on a bridge or road, expansion joints (3) are provided between adjacent foundation blocks (1), and each foundation block (1) is provided with an expansion joint steel (2), and the two expansion joint steels (2) are relatively distributed, an expansion joint water stop strip (5) is installed between the two expansion joint steels (2), a groove cavity is formed between the expansion joint water stop strip (5) and the two expansion joint steels (2), the groove cavity is filled with a sealing filling material layer (6) and is dense, and the upper end surface of the sealing filling material layer (6), the upper end surface of the expansion joint steel (2) and the upper end surface of the foundation block (1) are all on the same plane.
2. The cleaning-free device for bridge steel expansion joints according to claim 1 is characterized in that: One side surface of the foundation block (1) is an L-shaped surface (11), and the expansion joint steel (2) is placed on the L-shaped surface (11) and is integrally cast on the foundation block (1).
3. The cleaning-free device for bridge steel expansion joints according to claim 1 or 2, characterized in that: A 1 / 4 circular deformation cavity (21) is provided on one side surface of the upper end of the expansion joint steel (2), and a thin plate (22) is provided at the open end of the deformation cavity (21), and an interlaced seam (23) is provided between the thin plate (22) and the bottom of the open end of the deformation cavity (21).
4. The cleaning-free device for bridge steel expansion joints according to claim 3 is characterized in that: Both ends of the expansion joint water stop strip (5) pass through the insertion slit (23) and extend into the inner wall of the deformation cavity (21).
5. The cleaning-free device for bridge steel expansion joints according to claim 4 is characterized in that: The center of the expansion joint water stop strip (5) is concave.
6. The cleaning-free device for bridge steel expansion joints according to claim 1 is characterized in that: An interface treatment agent layer (7) is applied to the inner wall of the groove cavity, and the interface treatment agent layer (7) is in contact with the sealing filling material layer (6).
7. The cleaning-free device for bridge steel expansion joints according to claim 6 is characterized in that: The interface treatment agent layer (7) is epoxy glue or silicon PU glue.
8. The cleaning-free device for bridge steel expansion joints according to claim 1 is characterized in that: The sealing filling material layer (6) is formed by mixing rubber particles and silicon PU glue in a mass ratio of 4.0-5.0:1.0.