Bridge pile foundation reinforcing device

Abstract

The utility model proposes a kind of bridge pile foundation reinforcing device, including bottom stake, bearing platform, pier column, the top of bottom stake is fixedly connected with bearing platform, the top of bearing platform is fixedly connected with pier column;Fixedly connected with tie beam between the pier column;The connecting place of bottom stake and bearing platform is fixedly connected with reinforcing sleeve. The utility model has the advantages that reinforcing sleeve and triangular rib plate (thick 10-15mm steel plate welding) are arranged at the connecting place of bearing platform bottom and bottom stake, rib plate extends to 1.5 times pile diameter place below pile top. Rib plate uses Q345B steel plate with pile foundation same level, can realize the purpose of reinforcing effect promotion, rib plate cooperates the design of reinforcing sleeve, can make node bending strength greatly improve, reduces settlement risk. Tie beam is upgraded to energy dissipation component, improves overall seismic capacity. Honeycomb cavity, i. e. multiple honeycomb holes, are formed in tie beam, and high-damping material (such as silica gel particles+rubber particle composite material) is filled in the holes. The purpose of improving damping effect is achieved, and cavity dissipates seismic energy.

Description

Technical Field

[0001] This utility model relates to the field of bridge pile foundation technology, and in particular to a bridge pile foundation reinforcement device. Background Technology

[0002] In bridge engineering, pile foundations, as key components bearing the loads of the superstructure, directly affect the safety and durability of bridges due to the reliability of their joint areas and the overall seismic performance of the structure. Traditional pile foundation structures typically consist of bottom piles, pile caps, and piers. The connection between the pile cap and the bottom piles is prone to significant stress concentration due to geometric abrupt changes and concentrated load transfer. Engineering practice shows that this joint area is susceptible to damage such as crack propagation, concrete crushing, and even steel buckling under long-term service and seismic loading, leading to a decrease in the joint's flexural and shear resistance, and consequently, the risk of uneven settlement or structural failure.

[0003] To improve joint strength, conventional reinforcement methods often involve encasing the pile foundation in steel plates or increasing its size. However, simply encasing the pile foundation in steel plates results in discontinuous stress transfer paths, making it difficult to effectively distribute bending moments and shear forces. Increasing the pile foundation volume significantly increases material usage and construction difficulty, leading to low economic efficiency. Furthermore, the tie beams in existing bridge structures primarily function to coordinate pier deformation, offering limited energy dissipation capabilities. Studies show that when seismic waves reach the pile foundation system, tie beams, as connecting components, often fail brittlely due to a lack of effective energy dissipation mechanisms, exacerbating the overall structural collapse risk.

[0004] In recent years, although some studies have attempted to improve seismic performance by incorporating damping materials into cavities in concrete members, two major technical bottlenecks exist: first, an improperly designed cavity shape can weaken the strength of the member itself; second, insufficient adhesion between the filling material and the matrix can easily lead to interfacial delamination. For example, circular holes are prone to perforation under stress, while the aging problem of traditional rubber-based materials limits the stability of long-term energy dissipation effects. Therefore, a bridge pile foundation reinforcement device is proposed to address these issues. Utility Model Content

[0005] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0006] Therefore, one objective of this utility model is to propose a bridge pile foundation reinforcement device to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0007] To achieve the above objectives, one embodiment of the present invention provides a bridge pile foundation reinforcement device, including a bottom pile, a pile cap, and a pier column, wherein the top of the bottom pile is fixedly connected to the pile cap, and the top of the pile cap is fixedly connected to the pier column.

[0008] The piers are fixedly connected by tie beams;

[0009] A reinforcing sleeve is fixedly connected at the connection between the bottom pile and the pile cap, and a rib plate is fixedly connected between the horizontal and vertical parts of the reinforcing sleeve.

[0010] The tie beam has several honeycomb holes inside, and the honeycomb holes are filled with a damping layer.

[0011] Preferably, in any of the above schemes, the bottom pile, the pile cap, and the pier are all made of reinforced concrete, and the pier is perpendicular to the tie beam.

[0012] The above technical solution is adopted: The bridge pile foundation device mainly includes the following structures: bottom piles, pile caps, piers, and tie beams. Several bottom piles are fixedly connected to the bottom of the pile cap. The bottom piles are made of reinforced concrete cages, and then a steel cylinder is placed on the outer surface of the bottom piles.

[0013] The core of this device lies in resolving the stress concentration problem at the connection between the pile cap and the bottom pile, thereby enhancing the bending and shear resistance of the joint. A reinforcing sleeve and triangular ribs (10-15mm thick welded steel plates) are installed at the connection between the bottom of the pile cap and the bottom pile. The ribs extend to 1.5 times the pile diameter below the pile top. The ribs are made of Q345B steel plates of the same grade as the pile foundation, achieving the goal of enhanced reinforcement. The design of the ribs in conjunction with the reinforcing sleeve significantly improves the bending strength of the joint, reducing the risk of settlement.

[0014] Upgrading the tie beam into an energy-dissipating component enhances overall seismic resistance. The tie beam's interior features honeycomb-like cavities (multiple honeycomb holes) filled with a high-damping material (such as a composite material of silicone microparticles and rubber particles). This improves vibration reduction by dissipating seismic energy through the cavities.

[0015] Preferably, in any of the above embodiments, the reinforcing sleeve is welded from steel plates, and the ribs are triangular steel plates, with at least three plates evenly distributed along the circumference of the reinforcing sleeve.

[0016] The device consists of: bottom pile: cast with reinforced concrete, with the main reinforcement extending from the top and inserted into the pile cap; pile cap: with a pre-embedded reinforcing sleeve at the bottom and connected to the pier at the top, cast with C40 concrete; pier: standing vertically on the pile cap, tied with the tie beam with steel bars and cast into shape; tie beam: with pre-embedded honeycomb holes inside, filled with a damping layer.

[0017] Preferably, in any of the above schemes, the reinforcing sleeve is bonded to the bottom pile and the pile cap using adhesive or chemical bolts.

[0018] Preferably, in any of the above schemes, the honeycomb holes are hexagonal through holes with a diameter of 1 / 6 to 1 / 8 of the width of the tie beam section, and the distance between the walls of adjacent honeycomb holes is not less than 50 mm.

[0019] The core design of this device is: a node reinforcement system.

[0020] Reinforcing sleeve: Constructed from Q345B steel plates in a U-shape, with the vertical portion being 3 / 4 the thickness of the pile cap, wrapping around the top of the bottom pile; Ribs: Triangular steel plates (10-15mm thick), multiple pieces evenly distributed along the circumference of the reinforcing sleeve. The bottom edge of each rib is welded to the bottom of the reinforcing sleeve, and the top edge is welded to the side wall of the reinforcing sleeve, extending to a depth of 1.5 times the pile diameter below the surface of the bottom pile (e.g., 1.5m if the pile diameter is 1m).

[0021] Mechanism of action: The triangular rib plate disperses the load of the foundation to the bottom pile, inhibiting crack development. Finite element simulation shows that the bending strength of the joint is increased by 60%.

[0022] Tie beam energy dissipation structure: honeycomb holes: hexagonal through holes, with a hole diameter D of 1 / 8 of the tie beam width W, and a spacing of ≥50mm between adjacent hole walls; damping layer: a composite material of silicone rubber (90%) and graphite particles (10%), which is fixed by epoxy resin bonding.

[0023] Preferably, in any of the above embodiments, the damping layer is a composite material of silicone rubber and graphite particles, wherein the graphite particles account for 5%-10% of the mass, and the damping layer is bonded to the inner wall of the honeycomb pores with epoxy resin.

[0024] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0025] This bridge pile foundation reinforcement device addresses the stress concentration problem at the connection between the pile cap and the bottom pile, enhancing the joint's flexural and shear resistance. A reinforcing sleeve and triangular ribs (10-15mm thick welded steel plates) are installed at the connection between the pile cap and the bottom pile, extending to 1.5 times the pile diameter below the pile top. The ribs are made of Q345B steel plates of the same grade as the piles, achieving a significant improvement in reinforcement. The design of the ribs in conjunction with the reinforcing sleeve greatly increases the joint's flexural strength, reducing the risk of settlement.

[0026] Upgrading the tie beam into an energy-dissipating component enhances overall seismic resistance. The tie beam's interior features honeycomb-like cavities (multiple honeycomb holes) filled with a high-damping material (such as a composite material of silicone microparticles and rubber particles). This improves vibration reduction by dissipating seismic energy through the cavities.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0030] Figure 2 This is a structural schematic diagram of the present invention from a second perspective;

[0031] Figure 3 This is a structural schematic diagram of the present invention from a third-view perspective;

[0032] Figure 4 This is a schematic diagram of the tie beam of this utility model.

[0033] In the diagram: 1-bottom pile, 2-pillar cap, 3-pier column, 4-tie beam, 5-reinforcing sleeve, 6-rib plate, 7-honeycomb hole, 8-damping layer. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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.

[0036] like Figure 1-4 As shown, this bridge pile foundation reinforcement device includes a bottom pile 1, a pile cap 2, and a pier column 3. The top of the bottom pile 1 is fixedly connected to the pile cap 2, and the top of the pile cap 2 is fixedly connected to the pier column 3.

[0037] Tie beams 4 are fixedly connected between the piers 3;

[0038] A reinforcing sleeve 5 is fixedly connected at the connection between the bottom pile 1 and the pile cap 2, and a rib plate 6 is fixedly connected between the horizontal and vertical parts of the reinforcing sleeve 5.

[0039] The tie beam 4 has several honeycomb holes 7 inside, and the honeycomb holes 7 are filled with a damping layer 8.

[0040] Example 1: The bottom pile 1, pile cap 2, and pier 3 are all made of reinforced concrete, with pier 3 perpendicular to the tie beam 4. The reinforcing sleeve 5 is welded from steel plates, and the ribs 6 are triangular steel plates, with at least three evenly distributed along the circumference of the reinforcing sleeve 5. The reinforcing sleeve 5 is bonded to the bottom pile 1 and pile cap 2 by adhesive bonding or chemical bolting. The honeycomb holes 7 are hexagonal through holes with a diameter of 1 / 6-1 / 8 of the width of the tie beam 4 section, and the spacing between adjacent honeycomb holes 7 is not less than 50mm. The damping layer 8 is a composite material of silicone rubber and graphite particles, with graphite particles accounting for 5%-10% of the mass. The damping layer 8 is bonded to the inner wall of the honeycomb holes 7 by epoxy resin.

[0041] Example 2: This bridge pile foundation device mainly includes the following structures: bottom pile 1, pile cap 2, pier column 3, and tie beam 4. Several bottom piles 1 are fixedly connected to the bottom of the pile cap 2. The bottom pile 1 is a reinforced concrete structure, and then a steel cylinder is placed on the outer surface of the bottom pile 1. The device consists of: bottom pile 1: made of reinforced concrete, with the main reinforcement extending from the top and inserted into the pile cap 2; pile cap 2: the bottom is pre-embedded with a reinforcing sleeve 5, and the top is connected to the pier column 3, made of C40 concrete; pier column 3: stands vertically on the pile cap 2, and is tied to the tie beam 4 with steel bars before being cast; tie beam 4: has pre-embedded honeycomb holes 7 inside, and the holes are filled with a damping layer 8.

[0042] The core design of this device is: a node reinforcement system.

[0043] Reinforcing sleeve 5: A U-shaped structure welded from Q345B steel plates, with the vertical portion being 3 / 4 the thickness of the pile cap 2, wrapping around the top of the bottom pile 1; Rib plate 6: Triangular steel plates (10-15mm thick), with multiple pieces evenly distributed around the circumference of the reinforcing sleeve 5. The bottom edge of each rib plate 6 is welded to the bottom of the reinforcing sleeve 5, and the top edge is welded to the side wall of the reinforcing sleeve 5, extending to a depth of 1.5 times the pile diameter below the surface of the bottom pile 1 (e.g., 1.5m if the pile diameter is 1m).

[0044] Mechanism of action: The triangular rib plate 6 disperses the load of the pile cap 2 to the bottom pile 1, inhibiting crack development. Finite element simulation shows that the bending strength of the joint is increased by 60%.

[0045] Tie beam energy dissipation structure: honeycomb hole 7: hexagonal through hole, hole diameter D is 1 / 8 of the width W of tie beam 4, and the distance between adjacent hole walls is ≥50mm; damping layer 8: a composite material of silicone rubber (90%) and graphite particles (10%), which is fixed by epoxy resin bonding.

[0046] The working principle of this utility model is as follows:

[0047] Borehole drilling and reinforcement cage installation: Drill pile holes, hoist and place reinforcement cage with main reinforcement, and pour C30 concrete to form bottom pile 1;

[0048] Pre-installation of the reinforcement system: Clean the laitance at the top of the bottom pile 1 and apply an interface agent to the pile head; fit the reinforcement sleeve 5 into the top of the bottom pile 1 and adjust its position so that the gap is ≤5mm; fix the reinforcement sleeve 5 to the pre-embedded plate on the bottom surface of the pile cap 2 with chemical bolts (or weld directly); weld 4 rib plates 6 to the side wall and bottom of the reinforcement sleeve 5, and the weld seam is fully welded and treated with anti-corrosion; pour C40 micro-expansion concrete into the gap between the reinforcement sleeve 5 and the bottom pile 1;

[0049] Construction of the foundation and pier: Tie the steel mesh of foundation 2, pre-embed the vertical steel bars of pier 3, and pour concrete for foundation 2; erect formwork and pour pier 3, and pre-embed the connecting steel bars of tie beam 4.

[0050] Tie beam prefabrication and filling: The tie beam 4 concrete component is prefabricated in the factory, and hexagonal steel molds are pre-embedded inside to form honeycomb holes 7; after demolding, epoxy resin is brushed onto the inner wall of the honeycomb holes 7; liquid silicone rubber-graphite mixture is injected and cured for 48 hours to form a damping layer 8.

[0051] On-site assembly: hoisting the tie beams from section 4 to section 3 of the piers, connecting them with steel bars, and then casting concrete at the joints.

[0052] Compared with the prior art, the present invention has the following advantages:

[0053] This bridge pile foundation reinforcement device addresses the stress concentration problem at the connection between the pile cap 2 and the bottom pile 1, enhancing the joint's bending and shear resistance. A reinforcement sleeve 5 and a triangular rib plate 6 (10-15mm thick welded steel plate) are installed at the connection between the bottom of the pile cap 2 and the bottom pile 1. The rib plate 6 extends to 1.5 times the pile diameter below the pile top. The rib plate uses Q345B steel plate of the same grade as the pile foundation, achieving the goal of improved reinforcement. The design of the rib plate 6, in conjunction with the reinforcement sleeve 5, significantly increases the bending strength of the joint, reducing the risk of settlement.

[0054] The tie beam 4 is upgraded to an energy-dissipating component, improving its overall seismic resistance. Multiple honeycomb cavities 7 are created inside the tie beam 4, filled with a high-damping material (such as a composite material of silicone microparticles and rubber particles). This enhances the damping effect, as the cavities dissipate seismic energy.

Claims

1. A bridge pile foundation reinforcement device, characterized in that, It includes a bottom pile (1), a pile cap (2), and a pier column (3). The top of the bottom pile (1) is fixedly connected to the pile cap (2), and the top of the pile cap (2) is fixedly connected to the pier column (3). Tie beams (4) are fixedly connected between the piers (3); A reinforcing sleeve (5) is fixedly connected at the connection between the bottom pile (1) and the pile cap (2), and a rib plate (6) is fixedly connected between the horizontal part and the vertical part of the reinforcing sleeve (5); The tie beam (4) has several honeycomb holes (7) inside, and the honeycomb holes (7) are filled with a damping layer (8).

2. The bridge pile foundation reinforcement device as described in claim 1, characterized in that: The bottom pile (1), the pile cap (2), and the pier (3) are all made of reinforced concrete, and the pier (3) is perpendicular to the tie beam (4).

3. The bridge pile foundation reinforcement device as described in claim 2, characterized in that: The reinforcing sleeve (5) is welded from steel plates, and the ribs (6) are triangular steel plates, with at least 3 plates evenly distributed along the circumference of the reinforcing sleeve (5).

4. The bridge pile foundation reinforcement device as described in claim 3, characterized in that: The reinforcing sleeve (5) is bonded or chemically bolted to the bottom pile (1) and the pile cap (2).

5. The bridge pile foundation reinforcement device as described in claim 4, characterized in that: The honeycomb hole (7) is a hexagonal through hole with a diameter of 1 / 6 to 1 / 8 of the cross-sectional width of the tie beam (4). The distance between the walls of adjacent honeycomb holes (7) is not less than 50 mm.

6. The bridge pile foundation reinforcement device as described in claim 5, characterized in that: The damping layer (8) is a composite material of silicone rubber and graphite particles, wherein the graphite particles account for 5%-10% of the mass, and the damping layer (8) is bonded to the inner wall of the honeycomb pores (7) with epoxy resin.

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