T-beam reinforcement structure of the bridge

Abstract

This utility model discloses a T-beam reinforcement structure for bridges, applicable to bridges with at least two T-beams arranged side-by-side. The reinforcement structure includes a reinforcement plate disposed between two adjacent T-beams, with the side edges of the reinforcement plate connected to the T-beams on their respective sides, thereby forming a box-shaped structure with the adjacent T-beams and the reinforcement plate. This structure connects adjacent T-beams into a whole, transforming the originally independently stressed T-beams into a unified load-bearing system. This enhances the overall stiffness and lateral connection of the bridge, effectively avoiding localized damage caused by single-beam stress, and improving the overall collaborative working capacity of the structure. Consequently, it significantly improves the bridge's bending and shear bearing capacity, thus enhancing the overall mechanical performance of the bridge.

Description

Technical Field

[0001] This utility model mainly relates to a bridge reinforcement structure, and more particularly to a T-beam reinforcement structure. Background Technology

[0002] T-beam bridges are one of the most common bridge superstructure types in my country, widely used in highways, municipal works, and rail transit. Over time, these bridges suffer damage due to a combination of factors, including environmental factors, overloading, material deterioration, poor construction quality, and inadequate maintenance. Simultaneously, rapid societal development has led to a dramatic increase in traffic volume and a rising proportion of heavy-duty vehicles, exacerbating the problem of insufficient bending and shear strength in older bridges. Demolishing and rebuilding these bridges would not only consume significant financial and human resources but also potentially cause unnecessary waste and increase the social burden. Therefore, reasonable reinforcement and renovation of these bridges to restore and enhance their load-bearing capacity is a more feasible solution.

[0003] Existing methods for strengthening T-beams include ordinary concrete cross-section enlargement, steel plate bonding, external prestressing, and carbon fiber bonding. However, none of these methods can enhance the connection between adjacent T-beams, thus failing to create an overall effect and resulting in limited strengthening efficacy.

[0004] Therefore, it is necessary to provide a T-beam reinforcement structure that can more significantly improve the overall mechanical performance of bridges. Utility Model Content

[0005] The technical problem this invention aims to solve is how to enhance the connection between adjacent T-beams in order to improve the overall mechanical performance of the bridge.

[0006] The specific technical solution is as follows: The T-beam reinforcement structure is suitable for bridges with at least two T-beams arranged side by side. The reinforcement structure includes a reinforcement plate positioned between two adjacent T-beams, with the side edges of the plate connected to the T-beam on its respective side. This allows the two adjacent T-beams and the reinforcement plate to enclose a box-shaped structure. By connecting adjacent T-beams into a unified whole, this structure transforms the originally independently stressed T-beams into a cohesive load-bearing system, enhancing the overall stiffness and lateral stability of the bridge. It effectively avoids localized damage caused by single-beam stress, improves the overall structural coordination, and significantly enhances the bridge's bending and shear resistance, thereby improving its overall mechanical performance.

[0007] The reinforcing plate, used to connect the upper edge of the T-beam, slopes upwards from the bottom towards the direction opposite to the T-beam, forming an inverted trapezoidal post-cast groove between the reinforcing plate and the T-beam. This inverted trapezoidal groove facilitates full filling of the post-cast concrete during construction, reducing construction defects such as voids and honeycombing, and ensuring reinforcement quality. Furthermore, it increases the bonding surface between the reinforcing plate and the post-cast concrete, enhancing the bond strength between them and ensuring that the reinforcing plate and the T-beam can work together to bear the load, further improving the overall reinforcement effect.

[0008] The reinforcing plate is used to connect the lower layer of the side edge of the T-beam, forming a bottom plate for receiving the subsequent concrete pouring. The bottom plate of the post-pouring trough acts as an "internal formwork" during the pouring stage, allowing it to directly receive the subsequent concrete without the need for additional temporary support structures. This simplifies the construction process, reduces the risks of working at heights, and also lowers the construction difficulty and cost.

[0009] The thickness of the side end of the reinforcing plate used to connect the T-beam is greater than the thickness of the middle part of the reinforcing plate. By increasing the thickness of the side end of the T-beam, the post-cast groove can be deepened, thereby increasing the bonding surface between the post-cast concrete and the reinforcing plate, as well as between the post-cast concrete and the T-beam, enhancing the bond strength between the three, ensuring that the reinforcing plate and the T-beam can work together to bear the load, and further improving the overall reinforcement effect.

[0010] The reinforcing plate has several slab connecting bars spaced apart at its side edge for connecting to the T-beam, and the T-beam has several beam connecting bars spaced apart at its side wall for connecting to the reinforcing plate. The slab connecting bars and beam connecting bars are connected one-to-one, and their connection points are located within the post-cast trench. This corresponding connection between the slab connecting bars and beam connecting bars achieves a reliable steel reinforcement connection between the reinforcing plate and the T-beam, forming a continuous load-bearing system. Combined with the post-cast concrete in the trench, the connecting bars are encased in concrete, not only avoiding the problem of exposed and corroded connecting bars, but also forming a "steel-concrete" collaborative load-bearing connection system. This significantly enhances the internal force transfer efficiency between the reinforcing plate and the T-beam, ensuring synchronous deformation and shared load-bearing capacity, further strengthening the overall connection between adjacent T-beams, and compensating for the deficiency of existing reinforcement methods in establishing reliable connections between adjacent T-beams.

[0011] The reinforced slab is provided with several rows of fiber-reinforced steel bars spaced along the length of the T-beam. These fiber-reinforced steel bars possess high strength, high crack resistance, and good corrosion resistance, and are relatively lightweight. Compared to ordinary steel bars, they significantly improve the tensile strength and fatigue resistance of the reinforced slab, extending its service life. Simultaneously, the fiber-reinforced steel bars effectively inhibit crack development during stress, ensuring the integrity and load-bearing stability of the reinforced slab, improving the durability of the reinforced structure, and reducing subsequent maintenance costs.

[0012] The reinforcing slab is constructed from ultra-high performance concrete (UHVPC). UHVPC possesses ultra-high strength, ultra-high toughness, and excellent durability. Its compressive and tensile strengths are far superior to those of ordinary concrete. Using UHVPC to construct the reinforcing slab significantly enhances its load-bearing capacity and damage resistance. Furthermore, it significantly improves the connection strength between adjacent T-beams while maintaining a relatively small cross-sectional size, thereby reducing the sludge weight. Simultaneously, UHVPC exhibits excellent impermeability, freeze-thaw resistance, and carbonation resistance, effectively resisting the influence of the external environment, slowing down material degradation, and ensuring the long-term stable function of the reinforced structure.

[0013] The reinforcement structure also includes a side reinforcement layer attached to the sidewall of the web of the T-beam. The side reinforcement layer locally thickens the web of the T-beam, improving the shear bearing capacity of the web and compensating for the insufficient shear resistance caused by the low design load level of the original bridge and the increase in heavy-load vehicles. This layer works in conjunction with the reinforcement plate to smoothly transfer the shear force flow from the web to the reinforcement plate, and then distribute it to adjacent beam segments, forming a shear force transfer chain of "web-reinforcement plate-web", further amplifying the overall effect. At the same time, the side reinforcement layer can seal and restrain the cracks in the original web of the beam, inhibiting the further development of cracks, thereby restoring the durability of the structure.

[0014] The side reinforcement layer is constructed using ultra-high performance concrete. Ultra-high performance concrete possesses ultra-high strength, ultra-high toughness, and excellent durability. Its compressive and tensile strengths are far superior to those of ordinary concrete. Using it to construct the side reinforcement layer can significantly enhance the load-bearing capacity and damage resistance of the side reinforcement layer itself, and significantly improve the strength of the web of the T-beam while maintaining a relatively small cross-sectional size, thereby achieving the effect of reducing self-weight. At the same time, ultra-high performance concrete has excellent impermeability, frost resistance, and carbonation resistance, which can effectively resist the influence of the external environment, slow down the rate of material deterioration, and ensure the long-term stable function of the reinforced structure.

[0015] The reinforcement structure also includes a top reinforcement layer that replaces the original reinforced concrete cast-in-place layer at the top of the T-beam. This top reinforcement layer is made of ultra-high performance concrete. Replacing the original cast-in-place layer with this ultra-high performance concrete top reinforcement layer can, on the one hand, completely solve the problem of insufficient strength caused by material deterioration and poor construction quality in the original cast-in-place layer, significantly improving the load-bearing capacity of the top of the T-beam. On the other hand, the top reinforcement layer can connect the tops of adjacent T-beams into a whole, forming a coordinated reinforcement system with the bottom reinforcement plate. This makes the entire superstructure of the T-beam bridge a complete load-bearing unit, thereby comprehensively improving the bridge's overall bending, shear, and deformation resistance. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the T-beam reinforcement structure of the bridge; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a structural schematic diagram of the reinforcing plate.

[0017] The labels in the diagram represent: 1. T-beam; 11. Beam connecting reinforcement; 2. Reinforcing plate; 21. Post-cast trench; 22. Post-cast trench bottom plate; 23. Slab connecting reinforcement; 24. Fiber reinforced steel bar; 3. Side reinforcement layer; 4. Top reinforcement layer. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example like Figures 1 to 3 As shown in the figure, in this embodiment, the T-beam reinforcement structure is applicable to bridges with two T-beams 1 arranged side by side; the reinforcement structure includes a high-performance concrete reinforcement plate 2 set between the two adjacent T-beams 1, and the side edges of the reinforcement plate 2 are connected to the T-beam 1 on the respective side, so that the two adjacent T-beams 1 and the reinforcement plate 2 enclose a box-shaped structure.

[0020] In this embodiment, the upper layer of the reinforcing plate 2, used to connect the side edge of the T-beam 1, is inclined from bottom to top in a direction away from the T-beam 1, forming an inverted trapezoidal post-cast groove 21 between the reinforcing plate 2 and the T-beam 1. A bottom plate 22 for receiving the post-cast concrete is formed on the lower layer of the reinforcing plate 2, used to connect the side edge of the T-beam 1. The gap between the bottom plate 22 and the side wall of the T-beam 1 is set to 10mm, and the lower and upper ends of the post-cast groove 21 are 40mm and 70mm away from the side wall of the T-beam 1, respectively. The middle thickness of the reinforcing plate 2 is 60mm, while the thickness of its side end used to connect the T-beam 1 is greater than 60mm to increase the depth of the post-cast groove 21. In subsequent construction, ultra-high performance concrete is cast in-situ into the post-cast groove 21 to form a post-cast strip.

[0021] In this embodiment, the reinforcing plate 2 is provided with a number of plate connecting bars 23 at intervals on the side edge for connecting the T-beam 1, and the T-beam 1 is provided with a number of beam connecting bars 11 at intervals equal to the number of plate connecting bars 23 on the side wall for connecting the reinforcing plate 2; the positions of the plate connecting bars 23 and the beam connecting bars 11 correspond one-to-one, and the two are connected by double-sided welding, and the connection point of the two is located in the post-cast groove 21.

[0022] In this embodiment, a plurality of fiber-reinforced steel bars 24 are spaced apart along the length of the T-beam 1 inside the reinforcing plate 2. Specifically, the fiber-reinforced steel bars 24 are selected from any one of carbon fiber steel bars, aramid fiber steel bars, glass fiber steel bars, and basalt fiber steel bars.

[0023] In this embodiment, the reinforcement structure also includes a side reinforcement layer 3 attached to the sidewall of the web of the T-beam 1, which is made of ultra-high performance concrete. Specifically, the thickness of the side reinforcement layer 3 is set to 15-30mm, and it can be set on one or both sides of the web as needed. Before setting the side reinforcement layer 3, the surface of the web needs to be roughened, and the side reinforcement layer 3 is applied by manual pressing.

[0024] In this embodiment, the reinforcement structure also includes a top reinforcement layer 4 that replaces the original reinforced concrete cast-in-place layer at the top of the T-beam 1, which is constructed as an ultra-high performance concrete layer. Specifically, the thickness of the top reinforcement layer 4 is equal to the thickness of the replaced original reinforced concrete cast-in-place layer, and a top slab steel mesh and interface reinforcement bars are also installed within the top reinforcement layer 4. Before constructing the top reinforcement layer 4, the original reinforced concrete cast-in-place layer at the top of the T-beam 1 must be removed, then the top of the T-beam 1 is roughened, interface reinforcement bars are inserted, and ultra-high performance concrete is poured after the top slab steel mesh is laid to form the top reinforcement layer 4. It is worth noting that before inserting the interface reinforcement bars, the steel bars and steel strands of the T-beam 1 must be positioned using a steel bar locator to ensure accurate avoidance during drilling.

[0025] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A T-beam reinforcement structure for a bridge, characterized in that: Applicable to bridges with at least two T-beams (1) arranged side by side; the reinforcement structure includes a reinforcement plate (2) disposed between two adjacent T-beams (1), the side edges of the reinforcement plate (2) being connected to the T-beams (1) on the same side, so that the two adjacent T-beams (1) and the reinforcement plate (2) enclose a box structure. The reinforcing plate (2) is provided with a number of plate connecting bars (23) at intervals at the side edge of the T-beam (1), and the T-beam (1) is provided with a number of beam connecting bars (11) at intervals at the side wall of the reinforcing plate (2); the plate connecting bars (23) and the beam connecting bars (11) are connected one-to-one, and the connection between the two is located in the post-cast groove (21).

2. The T-beam reinforcement structure for bridges according to claim 1, characterized in that: The reinforcing plate (2) is used to connect the upper side edge of the T-beam (1) and is inclined from bottom to top in a direction away from the T-beam (1), so that an inverted trapezoidal post-cast groove (21) is formed between the reinforcing plate (2) and the T-beam (1).

3. The T-beam reinforcement structure for bridges according to claim 2, characterized in that: The reinforcing plate (2) is used to connect the lower layer of the side edge of the T-beam (1) and has a bottom plate (22) for receiving the post-cast concrete.

4. The T-beam reinforcement structure for bridges according to claim 2 or 3, characterized in that: The thickness of the side end of the reinforcing plate (2) used to connect the T-beam (1) is greater than the thickness of the middle part of the reinforcing plate (2).

5. The T-beam reinforcement structure for bridges according to claim 1, characterized in that: The reinforcing plate (2) is provided with several fiber steel bars (24) spaced apart along the length of the T-beam (1).

6. The T-beam reinforcement structure for bridges according to claim 1, characterized in that: The reinforcing plate (2) is made of ultra-high performance concrete.

7. The T-beam reinforcement structure for bridges according to claim 1, characterized in that: The reinforcement structure also includes a side reinforcement layer (3) attached to the side wall of the web of the T-beam (1).

8. The T-beam reinforcement structure for bridges according to claim 7, characterized in that: The side reinforcement layer (3) is made of ultra-high performance concrete.

9. The T-beam reinforcement structure for a bridge according to claim 1, characterized in that: The reinforcement structure also includes a top reinforcement layer (4) that replaces the original reinforced concrete cast-in-place layer at the top of the T-beam (1), and the top reinforcement layer (4) is set as an ultra-high performance concrete layer.

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