A reinforcement device for bridge piers to resist erosion

Abstract

This utility model belongs to the field of bridge pier safety protection and discloses a reinforcement device for bridge piers to resist erosion. It includes a permeable protective barrel, which is fitted around the bridge pier to form an annular cavity. The cavity is filled with a filler material tightly adhering to the outer wall of the bridge pier. The top of the permeable protective barrel is sealed with a concrete cover. The protective barrel is composed of multiple vertically spliced ​​prefabricated sections, each with multiple circumferential openings on its sidewalls. These openings allow water flow to partially penetrate rather than directly impact the bridge pier, effectively dispersing water energy and slowing down the downstream water flow velocity, thereby inhibiting sediment initiation and localized erosion. The filler material fits tightly against the bridge pier, providing lateral support and reinforcement, enhancing the overall stability of the bridge pier. The concrete cover and prefabricated section structure ensure the device's airtightness and modular convenience, facilitating construction, installation, and subsequent maintenance. This device can simultaneously achieve the dual goals of erosion prevention and bridge pier reinforcement, significantly improving the durability and safety performance of the bridge pier and avoiding the limitations of existing technologies with only single functions.

Description

Technical Field

[0001] This utility model belongs to the field of bridge pier safety protection technology, specifically relating to a bridge pier erosion-resistant reinforcement device. Background Technology

[0002] Bridges, as core infrastructure for water transportation, hold an irreplaceable position in national economic and social development. Their safe and stable operation is a crucial prerequisite for ensuring smooth traffic and economic progress. Cross-river bridges and their foundations are constantly exposed to turbulent water flow and bear the loads of water flow and waves, making them susceptible to localized scour around the piers. Simultaneously, natural riverbed erosion and increasing traffic volume and operating loads can lead to varying degrees of settlement in the bridge foundations, reducing the piers' load-bearing capacity and stability, and even causing bridge collapse due to water, seriously threatening traffic safety and causing significant economic losses. Among the various causes of bridge collapse and failure, hydrological factors account for the largest proportion, with floods and scour being the main components. Furthermore, factors such as floods and earthquakes not only directly affect bridge stability but can also indirectly affect it by exacerbating scour. Therefore, it is essential to take reinforcement and scour prevention measures for bridge piers.

[0003] Currently, for scour prevention of bridge piers, passive protection measures such as riprap protection, pier retaining rings, and gabions are commonly used in engineering projects. These measures mitigate localized scour by blocking downstream water flow, slowing water velocity, and preventing sediment initiation. However, these measures only focus on scour prevention and cannot strengthen the bridge pier itself. Regarding pier reinforcement, foundation enlargement is commonly used. While this enhances pier stability, it also expands the area and depth of localized scour around the pier. Clearly, existing technologies have significant limitations and fail to address the dual needs of scour prevention and pier reinforcement.

[0004] Existing bridge pier protection and reinforcement technologies cannot simultaneously achieve the functions of preventing local scour and reinforcing bridge piers, resulting in a single-function technical problem. Utility Model Content

[0005] This utility model provides a reinforcement device for bridge piers to resist erosion. This reinforcement device not only prevents local erosion of the bridge piers, but also achieves reinforcement of the bridge piers.

[0006] To achieve the above objectives, the present invention adopts the following technical content:

[0007] A reinforcement device for bridge piers to resist erosion includes a permeable protective barrel;

[0008] The permeable protective barrel is fitted around the bridge pier, forming an annular cavity between it and the bridge pier;

[0009] The annular cavity is filled with a filler material, which is disposed in close contact with the outer wall of the pier.

[0010] The top of the permeable protective barrel is sealed with a concrete cover.

[0011] The permeable liner comprises multiple prefabricated sections that are vertically spliced ​​and connected.

[0012] The prefabricated section has multiple openings along its circumferential direction on its sidewall.

[0013] Furthermore, the particle size of the filler is 0.20~0.25D; where D is the diameter of the bridge pier.

[0014] Furthermore, the filler includes one or more of gravel, rubber blocks, tire blocks, and construction waste.

[0015] Furthermore, the aperture diameter is smaller than the particle size of the filler, specifically 0.10~0.20D; where D is the diameter of the pier.

[0016] Furthermore, the openings are evenly distributed in multiple rows along the circumferential sidewall of the prefabricated section, and the porosity is 3%~10%.

[0017] Furthermore, the permeable pier has a height of 3~5D and an outer diameter of 3~5D; where D is the diameter of the bridge pier.

[0018] Furthermore, the top of the precast section is provided with a mortise and tenon grouting hole, and the bottom is provided with a tenon; two adjacent precast sections are fixedly connected by the mortise and tenon grouting hole and the tenon.

[0019] Furthermore, when the upper precast section and the lower precast section are spliced ​​together, the tenon of the lower precast section is inserted into the mortise and tenon grouting hole of the upper precast section, and grout is injected into the mortise and tenon grouting hole. After solidification, the connection between the two adjacent precast sections is achieved.

[0020] Furthermore, the thickness of the concrete cover is 0.2~0.4D; where D is the diameter of the pier.

[0021] Furthermore, the prefabricated section adopts a double-wall structure, including an outer wall and an inner wall; the wall thickness of both the outer wall and the inner wall is 0.20~0.40D; where D is the diameter of the pier.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention provides a reinforcement device for bridge piers against erosion, comprising a permeable protective barrel. The permeable protective barrel is fitted around the bridge pier to form an annular cavity, and the cavity is filled with a filler material tightly adhering to the outer wall of the bridge pier. The top of the permeable protective barrel is sealed with a concrete cover, and the protective barrel is composed of multiple vertically spliced ​​prefabricated sections. Multiple circumferential openings are formed on the side walls of the prefabricated sections. The openings allow water flow to partially penetrate rather than directly impact the bridge pier, effectively dispersing water flow energy and slowing down the downstream water flow velocity, thereby inhibiting sediment initiation and localized erosion. The filler material fits tightly against the bridge pier, providing lateral support and reinforcement, enhancing the overall stability of the bridge pier. The concrete cover and prefabricated section structure ensure the device's airtightness and modular convenience, facilitating construction, installation, and subsequent maintenance. This device can simultaneously achieve the dual goals of erosion prevention and bridge pier reinforcement, significantly improving the durability and safety performance of the bridge pier and avoiding the limitations of existing technologies with only single functions.

[0024] Preferably, in this invention, the particle size range of the filler is limited to ensure that appropriate gaps are formed between the particles. This maintains the smooth flow of water exchange between the inside and outside of the permeable liner to balance water pressure, and also forms a dense packing structure to maintain the stability of the filler layer in turbulent environments, preventing reinforcement failure caused by particle loss.

[0025] Preferably, in this invention, the source of the filler material is expanded to include recycled resources (such as rubber blocks and construction waste), significantly reducing implementation costs. Different material combinations can optimize the damping characteristics and permeability of the filler layer, while also giving the device environmental benefits and resource recycling value.

[0026] Preferably, in this invention, the aperture diameter is controlled to be smaller than the particle size of the filler, physically preventing the filler from leaking out. The precisely designed aperture ratio maintains the water flow guidance function and forms a self-locking mechanism to ensure the integrity of the filler layer, fundamentally eliminating the risk of material leakage.

[0027] Preferably, in this invention, the multi-row uniform perforation layout ensures a more even distribution of water flow penetration, avoiding sudden changes in flow velocity in local areas. The scientifically designed porosity balances permeability and structural strength, effectively dissipating water flow energy without weakening the tank's pressure resistance.

[0028] Preferably, in this invention, the three-dimensional dimensions of the protective casing are optimized to adapt to the proportions of the bridge pier, ensuring coverage of key scour depth areas. A reasonable outer diameter design can effectively disrupt the flow field structure around the pier, while height matching ensures comprehensive protection against bottom scour and pier reinforcement.

[0029] Preferably, in this invention, the mortise and tenon grouting connection provides a dual consolidation mechanism. The tenon enables rapid and precise positioning of the prefabricated section, while the grouting filler forms a rigid connection, significantly improving the overall vertical rigidity of the protective barrel and its resistance to water flow shearing, thus solving the potential problem of easy loosening in segmented structures.

[0030] Preferably, in this invention, the inverted tenon joint process simplifies the underwater installation procedure. The lower tenon is embedded into the upper mortise to form a temporary fixation, and subsequent grouting and curing achieve a permanent connection, significantly reducing the difficulty of deep-water operations and ensuring the strength of the joint.

[0031] Preferably, in this invention, the thickness of the concrete cover is designed to balance sealing and buoyancy resistance. Its own weight can counteract the upward floating tendency of the filler in the water flow, while the closed structure prevents debris from intruding into the filler layer, maintaining the long-term functionality of the device.

[0032] Preferably, in this invention, the double-wall structure gives the protective barrel higher structural efficiency. The inner and outer walls work together to form a load-bearing skeleton, significantly improving the resistance to bending and compression, effectively resisting the impact of riverbed deformation and floating debris, and extending the service life of the device. Attached Figure Description

[0033] Figure 1 A structural schematic diagram of a bridge pier erosion-resistant reinforcement device provided for an embodiment of this utility model;

[0034] Figure 2 This is a top view of the permeable protective cover provided in an embodiment of the present utility model;

[0035] Figure 3 A schematic diagram of a prefabricated section provided for an embodiment of this utility model.

[0036] Figure label:

[0037] 1. Permeable protective casing; 2. Bridge pier; 3. Precast section; 4. Concrete cover; 5. Filler; 6. Opening; 7. Mortise and tenon grouting hole; 8. Tenon; 9. Outer wall; 10. Inner wall. Detailed Implementation

[0038] To make the technical problem solved by this utility model, the technical solution, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of this utility model. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] As mentioned in the background section, existing engineering projects often employ passive protection measures such as riprap protection, pier retaining rings, and gabions to mitigate scour around piers by blocking downstream water flow, slowing water velocity around the piers, and preventing sediment initiation. However, existing scour control measures often only consider their scour-prevention effect and do not reinforce the piers themselves. Reinforcing piers often involves enlarging the pier foundation; while this strengthens the pier, it also increases the area and depth of localized scour. Existing structures around piers typically only consider one aspect—scour prevention or pier reinforcement—lacking a method that can both prevent localized scour and reinforce the pier.

[0046] To address the aforementioned issues, this embodiment provides a reinforcement device for bridge piers to resist scour. This reinforcement device can both prevent localized scour and reinforce bridge piers.

[0047] like Figure 1 As shown in the figure, this embodiment provides a pier scour-resistant reinforcement device, including a permeable protective barrel 1, which is arranged at the bottom of the pier 2 to reinforce the pier 2 and reduce local scour of the pier.

[0048] For example, the permeable protective barrel 1 is cylindrical in shape and includes multiple prefabricated sections 3 connected together and a solid concrete cover 4.

[0049] like Figure 2 As shown, the permeable retaining wall 1 is filled with filler material 5 around the bridge pier 2. The presence of filler material 5 makes the internal structure of the permeable retaining wall 1 more complex, the flow path more tortuous, and the turbulence effect stronger, which can effectively reduce the flow velocity of the water in front of the pier and the local scouring of the bridge pier foundation by the downstream water flow.

[0050] For example, the particle size of the filler 5 is preferably 0.20-0.25D. When the particle size of the filler 5 is too small, the permeable channels between the fillers 5 are narrow, making it difficult for water to flow through the barrel, resulting in the ineffective weakening of the submerged water flow in front of the pier, which in turn leads to severe local scouring of the permeable barrel 1 itself. When the particle size of the filler 5 is too large, although the water flow channels between the fillers 5 also increase, the number of channels decreases. The larger particle size of the filler 5 increases the water-blocking area, which increases the submerged water flow and further aggravates the local scouring of the permeable barrel 1. Only when the particle size of the filler 5 is moderate, the porosity of the permeable barrel 1 is large, the water flow channels between the fillers 5 are large, more water can flow through the barrel, and the water flow velocity and vortex system are weakened due to disturbance, thereby reducing the local scouring of the permeable barrel 1 itself.

[0051] As another optimization of this embodiment, the filler 5 can be gravel, rubber blocks, tire blocks, construction waste, etc., which effectively utilizes waste materials, is environmentally friendly and energy-saving, and is economical.

[0052] For example, the diameter of the pier 2 is D. From the perspective of economy and safety, the height of the permeable protective barrel 1 is preferably 3-5D, and the outer diameter is 3-5D. This expands the foundation of the pier, further strengthens the pier, and improves safety and stability.

[0053] For example, the concrete cover 4 can block the downward flow of water on the water-facing side of the bridge pier, preventing the initiation of sediment and thus reducing local scouring. From the perspective of economy and safety, the thickness of the solid concrete cover 4 is preferably 0.2-0.4D.

[0054] like Figure 3As shown, in this embodiment, the sidewall of the permeable protective barrel 1 is assembled from multiple prefabricated sections 3. Each prefabricated section 3 has multiple openings 6 to disperse the incoming flow and allow water to pass through the gaps into the permeable barrel, thereby reducing localized scouring around the bridge pier through turbulence. The diameter of the openings 6 must be smaller than the particle size of the filler 5, preferably 0.10-0.20D. In principle, while ensuring the stability of the prefabricated section, the number and density of the openings 6 must also be guaranteed. The openings 6 should be evenly distributed in multiple rows along the prefabricated section 3, with a porosity preferably of 3%-10%. The range of the openings 6 must also maintain a distance from the upper and lower sides of the prefabricated section to allow for the length of the mortise and tenon grouting holes 7 and the tenon 8.

[0055] For example, the prefabricated section 3 is an assembled structure with a height of D. The number of prefabricated sections 3 can be increased or decreased as needed, thereby changing the height of the protective barrel.

[0056] As another preferred embodiment, each precast segment 3 has a pre-drilled mortise and tenon groove grouting hole 7 at its top. Adjacent precast segments are fixedly connected to each other by tenons 8 and mortise and tenon groove grouting holes 7, thereby realizing the splicing between precast segments 3. The mortise and tenon groove grouting holes 7 and tenons 8 are evenly distributed along the sidewalls to ensure the stability of the connection.

[0057] The length of the grouting hole 7 and the tenon 8 is preferably 0.20D, which leaves enough opening range to ensure the porosity of the prefabricated section and ensures the connection between the tenon and the mortise is stable and safe.

[0058] For example, the prefabricated section 3 includes an outer wall 9 and an inner wall 10, with the wall thickness between the outer wall 9 and the inner wall 10. From the perspective of economy and safety, the wall thickness is preferably 0.20-0.40D, which can both reinforce the bridge pier and reserve enough space for the filling material 5 inside.

[0059] During the fabrication and assembly of the permeable liner 1, multiple prefabricated sections 3 are first assembled, with the bottommost section 3 buried in the riverbed. During splicing, grout is first injected into the pre-drilled mortise and tenon grouting hole 7 at the top. Then, the tenon 8 of another prefabricated section 3 is joined to the mortise and tenon grouting hole 7. After solidification, the above operation is repeated to complete the splicing of multiple prefabricated sections 3.

[0060] After the prefabricated section 3 is assembled, it is filled with filler material 5. After it is filled, the protective barrel is sealed with a concrete cover 4.

[0061] Both the concrete cover 4 and the precast section 3 can be prefabricated, facilitating assembly, and the filler material 5 is also readily available. Therefore, this device is very convenient, economical, and easy to manufacture.

[0062] The permeable dam 1 and the internal filling material 5 reinforce the pier and expand the pier foundation, which not only improves the safety and stability of the pier, but also prevents the impact of gravel or debris flow in the river.

[0063] At the same time, the permeable liner 1 itself has a disturbance effect on the incoming flow, blocking the water flow under the pier's water-facing surface. By constructing complex and chaotic water flow channels through the openings and internal filling, it slows down the water flow speed and weakens the complex vortex system around the pier, greatly reducing the water flow's ability to carry sediment around the pier, and ultimately reducing the local scouring around the pier.

[0064] For example Figure 1 As shown, in this embodiment, the thickness of the concrete cover 4 is 0.2D. Excluding the bottom precast section 3 that is buried, a total of 3 precast sections 3 are spliced ​​together, with a total height of 3D. The buried precast section 3 leaves a height of 0.4D, so the height of the permeable liner is 3.6D. In this embodiment, the outer diameter of the permeable liner 1 is 4D.

[0065] For example Figure 2 As shown, in this embodiment, the filler 5 is a stone with a particle size of 0.1-0.4D.

[0066] For example Figure 3 As shown, in this embodiment, the thickness of the precast section 3 is 0.2D, and the number of mortise and tenon grouting holes 7 and tenons 8 are both 12, evenly distributed along the side wall, with a length of 0.2D.

[0067] In this embodiment, the openings 6 are arranged in 3 rows, with 22 openings in each row. The diameter of the openings 6 is 0.10D, and the calculated porosity of the prefabricated section 3 is 4.125%.

[0068] In summary, this utility model provides a reinforcement device for bridge piers to resist erosion, which has the following advantages compared with existing protection solutions:

[0069] The bridge pier scour reinforcement device consists of a permeable casing encased within the pier, forming an annular cavity filled with a material of appropriate particle size. The top is sealed with a concrete cap. The casing is constructed from precast sections with multiple rows of openings, joined together using mortise and tenon joints. The perforated design of the permeable casing, combined with the complex flow paths created by the internal filling material, effectively disperses the energy of the water flow in front of the pier, weakens the intensity of the submerged eddies, and significantly inhibits sediment migration and localized scour depth. The tightly fitted filling material provides lateral restraint, and the appropriately sized casing structure significantly expands the foundation bearing area, simultaneously enhancing the overall stability of the pier. The mortise and tenon grouting connection of the precast sections allows for rapid underwater assembly, while the concrete cap balances sealing and anti-buoyancy requirements. The filling material utilizes recycled resources, considering both economic and environmental benefits, and the double-walled casing structure enhances impact resistance. Ultimately, this device achieves the dual goals of scour prevention and structural reinforcement, overcoming the functional limitations of existing technologies.

[0070] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. A reinforcement device for bridge piers to resist erosion, characterized in that, Including permeable protective barrel (1); The permeable protective barrel (1) is fitted around the bridge pier (2), forming an annular cavity between it and the bridge pier (2); The annular cavity is filled with filler (5), and the filler (5) is set in close contact with the outer wall of the pier (2); The top of the permeable protective barrel (1) is covered with a concrete cover (4). The permeable liner (1) includes multiple prefabricated sections (3) that are vertically spliced ​​together; The prefabricated section (3) has multiple openings (6) along the circumferential direction on its side wall.

2. The scour-resistant reinforcement device for bridge piers according to claim 1, characterized in that, The particle size of the filler (5) is 0.20~0.25D; where D is the diameter of the pier.

3. The scour-resistant reinforcement device for bridge piers according to claim 1, characterized in that, The filler (5) includes one or more of gravel, rubber blocks, tire blocks and construction waste.

4. The scour-resistant reinforcement device for bridge piers according to claim 1, characterized in that, The diameter of the opening (6) is smaller than the particle size of the filler (5), and is 0.10~0.20D; where D is the diameter of the pier.

5. The scour-resistant reinforcement device for bridge piers according to claim 1, characterized in that, The openings (6) are evenly distributed in multiple rows along the circumferential sidewall of the prefabricated section, and the porosity is 3%~10%.

6. The scour-resistant reinforcement device for bridge piers according to claim 1, characterized in that, The permeable pier (1) has a height of 3~5D and an outer diameter of 3~5D; where D is the diameter of the pier.

7. The scour-resistant reinforcement device for bridge piers according to claim 1, characterized in that, The precast section (3) has a tenon groove grouting hole (7) pre-reserved at the top and a tenon (8) at the bottom; two adjacent precast sections (3) are fixedly connected by the tenon groove grouting hole (7) and the tenon (8).

8. The scour-resistant reinforcement device for bridge piers according to claim 7, characterized in that, When the upper precast section (3) and the lower precast section (3) are spliced ​​together, the tenon (8) of the lower precast section (3) is inserted into the mortise and tenon grouting hole (7) of the upper precast section (3), and grout is injected into the mortise and tenon grouting hole (7). After solidification, the connection between the two adjacent precast sections (3) is realized.

9. The scour-resistant reinforcement device for bridge piers according to claim 1, characterized in that, The thickness of the concrete cover (4) is 0.2~0.4D; where D is the diameter of the pier.

10. The scour-resistant reinforcement device for bridge piers according to claim 1, characterized in that, The prefabricated section (3) adopts a double-wall structure, including an outer wall (9) and an inner wall (10); the wall thickness of the outer wall (9) and the inner wall (10) is 0.20~0.40D; where D is the diameter of the pier.

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