Anti-scouring structure of bridge pile foundation

Abstract

The utility model discloses a bridge pile foundation anti-scour structure which comprises an anti-scour protection wall and an isolation layer, the anti-scour protection wall is annular, the anti-scour protection wall is arranged outside a pile foundation body in a sleeved mode, the bottom of the anti-scour protection wall abuts against a riverbed, and the top of the anti-scour protection wall is located above a flowing water face. The anti-scouring protection wall comprises concrete and protection wall steel bars, and the protection wall steel bars are arranged in the concrete. A gap is formed between the anti-scouring protection wall and the pile foundation body, and the isolation layer is arranged in the gap. The technical effects are achieved as follows: the scouring of water flow to the pile foundation body is reduced by utilizing the anti-scouring protection wall, the thickness of a pile foundation steel bar protection layer is indirectly increased, the corrosion speed of pile foundation steel bars is slowed down, and the bearing capacity of the pile foundation body is guaranteed; the anti-scour protection wall is not influenced by the elevation of the river channel scoured by water flow, and the anti-scour protection wall is influenced by self gravity and descends to a riverbed while the scoured elevation of the river channel is reduced; materials required by the anti-scour retaining wall are common materials in construction, so that an existing pile foundation can be conveniently constructed and transformed, and the repair construction cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a bridge pile foundation anti-scour structure. Background Technology

[0002] Due to factors such as land use, topography, and alignment, bridges are commonly used on highways. Bridges are even more commonly used when crossing mountain streams, rivers, or seasonal rivers.

[0003] However, when bridges cross rivers, especially seasonal ones, their substructures, such as the pile foundations, are inevitably subject to erosion by water flow. Long-term immersion and erosion of bridge pile foundations, coupled with fluctuations in water level, and repeated exposure to wind, snow, freezing temperatures, and intense sunlight, accelerates the carbonization of the pile foundation concrete, severely damaging its durability. Pile foundation erosion is one of the main causes of bridge damage from water. Water flow rubs against and collides with the riverbed near the pile foundations, causing erosion and leading to changes or misalignments in the foundation boundaries, potentially resulting in the overall collapse of the structure. Erosion can occur in any area of ​​the water flow, including streams, rivers, and tidal estuaries. The speed and extent of erosion depend on the flow velocity, flow rate, and geological conditions of the riverbed. Simultaneously, the erosion of the concrete cover reduces the protective layer of the reinforcing steel, causing corrosion and fracture, ultimately altering the bridge's load-bearing capacity. Therefore, a erosion-resistant structure for bridge pile foundations is needed to address these technical problems. Utility Model Content

[0004] Therefore, this utility model provides a bridge pile foundation anti-scour structure to solve the above-mentioned problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] According to a first aspect of the present invention, a bridge pile foundation anti-scour structure includes an anti-scour retaining wall and an isolation layer. The anti-scour retaining wall is annular and is sleeved on the outside of the pile foundation. The bottom of the anti-scour retaining wall abuts against the riverbed, and the top of the anti-scour retaining wall is located above the water surface.

[0007] The erosion protection wall includes concrete and wall reinforcement bars, with the wall reinforcement bars disposed within the concrete.

[0008] A gap is provided between the erosion protection wall and the pile body, and the isolation layer is disposed within the gap.

[0009] Furthermore, the retaining wall reinforcement includes vertical reinforcement and circumferential reinforcement. There are multiple vertical reinforcements arranged in a ring, and the circumferential reinforcements are wrapped around the multiple vertical reinforcements.

[0010] Furthermore, the circumferential reinforcing bar is a spiral reinforcing bar, and the spiral wire spacing of the circumferential reinforcing bar is 15cm to 25cm.

[0011] Furthermore, the distance between two adjacent vertical reinforcing bars is 25cm to 35cm.

[0012] Furthermore, the vertical reinforcing bars are tied together with the circumferential reinforcing bars.

[0013] Furthermore, the erosion protection wall is composed of multiple segments, which are stacked coaxially in the vertical direction.

[0014] Furthermore, the thickness of the erosion-resistant wall is greater than 20cm.

[0015] Furthermore, the isolation layer is sealed and bonded to the pile body and the erosion protection wall on both sides, and the isolation layer is made of elastic material.

[0016] Furthermore, the isolation layer is made of foam adhesive.

[0017] Furthermore, the thickness of the isolation layer is greater than 10 cm.

[0018] This utility model has the following advantages: It uses an anti-scour retaining wall to protect the pile foundation, which reduces the scouring effect of water flow on the pile foundation, indirectly increasing the thickness of the protective layer for the pile reinforcement, thereby slowing down the corrosion rate of the reinforcement and ensuring the bearing capacity of the pile foundation; it is unaffected by the riverbed elevation caused by water flow scouring. As the riverbed elevation decreases due to scouring, the anti-scour retaining wall, under its own weight, descends to the riverbed, reducing personnel inspection and construction costs, and effectively protecting the pile foundation; the materials required for the anti-scour retaining wall are all commonly used materials in construction, making them convenient to purchase and use, and practical; the structure is simple, facilitating construction and modification of existing pile foundations, and reducing repair and construction costs. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Figure 1 A transverse cross-sectional view of a bridge pile foundation anti-scour structure after it has been installed on a pile foundation, according to some embodiments of this utility model.

[0022] Figure 2 A transverse cross-sectional view of a bridge pile foundation anti-scour structure provided for some embodiments of this utility model.

[0023] Figure 3 This is a plan view of the retaining steel reinforcement of a bridge pile foundation anti-scour structure provided for some embodiments of this utility model.

[0024] Figure 4 This is an elevation view of the retaining steel reinforcement of a bridge pile foundation anti-scour structure, provided for some embodiments of the present invention.

[0025] Figure 5 This is a schematic diagram illustrating the installation conditions of a bridge pile foundation anti-scour structure, provided for some embodiments of this utility model.

[0026] In the diagram: 1. Pile foundation, 2. Scour protection wall, 3. Isolation layer, 4. Vertical reinforcement, 5. Circumferential reinforcement, 6. Riverbed, 7. Flowing water surface. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Example 1

[0029] like Figures 1 to 5As shown, a bridge pile foundation scour protection structure according to the first aspect of this utility model includes a scour protection wall 2 and an isolation layer 3. The scour protection wall 2 is annular and is fitted over the pile foundation body 1. The bottom of the scour protection wall 2 is in contact with the riverbed 6. During use, the riverbed 6 provides support for the scour protection wall 2. The top of the scour protection wall 2 is above the water surface 7. Preferably, the top of the scour protection wall 2 is more than 0.5m above the water surface. When the riverbed 6 is scourted and sinks due to water flow, the scour protection wall 2 will sink along with the riverbed 6, thereby protecting the exposed pile foundation body 1. When the top of the scour protection wall 2 is below the water surface, a new scour protection wall 2 needs to be installed and a corresponding isolation layer 3 needs to be set to provide good protection for the pile foundation body 1.

[0030] The erosion protection wall 2 includes concrete and wall reinforcement. The wall reinforcement is set inside the concrete, and the concrete is cast with a grade of not less than C30.

[0031] A gap is provided between the scour protection wall 2 and the pile foundation body 1. The width of the gap is not less than 10cm to facilitate demolding. An isolation buffer layer is reserved between the scour protection wall 2 and the pile foundation body 1. The isolation layer 3 is set in the gap. The isolation layer 3 is used to seal and buffer, prevent water flow from eroding the pile foundation body, and prevent the scour protection wall 2 from shaking and impacting the pile foundation body 1 under the action of water flow.

[0032] In this embodiment, it should be noted that the scour structure is suitable for the construction of bridge pile foundations in water scour sections in related fields such as highways, railways, water conservancy, and municipal construction. It is particularly suitable for the repair and protection of exposed bridge pile foundations in water scour sections. The template for pouring the anti-scour retaining wall 2 is made of plastic steel mold, which has the characteristics of being lightweight and high-strength, easy to install and disassemble, high recyclability, convenient construction and easy transportation. It can reduce the workload to a certain extent and increase the safety factors of construction.

[0033] The technical effects achieved in this embodiment are as follows: The anti-scour retaining wall 2 protects the pile foundation 1, reducing the scouring effect of water flow on the pile foundation 1. The flowing water first washes the anti-scour retaining wall 2, reducing the erosion and stripping of the original concrete of the pile foundation 1, indirectly increasing the thickness of the protective layer for the pile foundation reinforcement, reducing the corrosion rate of the bridge pile foundation reinforcement, enhancing the durability of the bridge pile foundation structure, and ensuring the bearing capacity of the pile foundation 1. It is unaffected by the riverbed elevation caused by water flow scouring. As the riverbed elevation decreases due to scouring, the anti-scour retaining wall 2, under its own weight, descends to the riverbed, reducing personnel inspection and construction costs, and effectively protecting the pile foundation 1. The materials required for the anti-scour retaining wall 2 are all commonly used materials in construction, facilitating procurement and use, and possessing practicality. Its simple structure facilitates construction and modification of existing pile foundations, reducing repair and construction costs.

[0034] Example 2

[0035] like Figures 1 to 5 As shown in the figure, another bridge pile foundation anti-scour structure provided in this embodiment includes all the contents of embodiment 1. Only the different parts are described below.

[0036] In this embodiment, the retaining wall reinforcement includes vertical reinforcement 4 and circumferential reinforcement 5. There are multiple vertical reinforcement 4, which are arranged in a ring. The circumferential reinforcement 5 is wrapped around the multiple vertical reinforcement 4. The vertical reinforcement 4 and the circumferential reinforcement 5 are tied together. The vertical reinforcement 4 is made of Φ12 steel bar, and the circumferential reinforcement 5 is made of Φ8 steel bar.

[0037] In this embodiment, it should be noted that the circumferential reinforcing bar 5 is a spiral reinforcing bar, and the spiral wire pitch of the circumferential reinforcing bar 5 is 15cm to 25cm. Specifically, the spiral wire pitch of the circumferential reinforcing bar 5 can be set to 15cm, 20cm or 25cm.

[0038] The distance between two adjacent vertical reinforcing bars 4 is 25cm to 35cm. Specifically, the distance between two adjacent vertical reinforcing bars 4 can be set to 25cm, 30cm or 35cm.

[0039] The technical effect achieved by this embodiment is that the anti-erosion retaining wall 2 is equipped with retaining steel bars, which makes the overall strength of the anti-erosion retaining wall 2 higher, more robust and durable, and able to form a long-lasting protective effect.

[0040] Example 3

[0041] like Figures 1 to 5 As shown in the figure, another bridge pile foundation anti-scour structure provided in this embodiment includes all the contents of embodiment 1. Only the different parts are described below.

[0042] In this embodiment, the scour protection wall 2 is composed of multiple segments, each with a thickness greater than 20cm and a height of approximately 1m. The multiple segments of the scour protection wall 2 are stacked coaxially in the vertical direction. Specifically, after the riverbed is scourred and lowered by the flowing water, the scour protection wall 2, under its own weight, descends to protect the pile foundation 1 in real time. The number of scour protection wall 2 segments is increased in a timely manner according to the scour rate and the detection cycle, with the topmost scour protection wall 2 preferably protruding above the water surface to ensure a good protective effect on the pile foundation 1.

[0043] Example 4

[0044] like Figures 1 to 5 As shown in the figure, another bridge pile foundation anti-scour structure provided in this embodiment includes all the contents of embodiment 1. Only the different parts are described below.

[0045] In this embodiment, the two sides of the isolation layer 3 are sealed and fitted to the pile foundation 1 and the erosion protection wall 2 respectively. The isolation layer 3 is made of elastic material and can play a good sealing and buffering role.

[0046] In this embodiment, it should be noted that the isolation layer 3 is made of foam adhesive and the thickness of the isolation layer 3 is greater than 10cm.

[0047] The technical effect achieved in this embodiment is as follows: the gap between the pile foundation 1 and the scour protection wall 2 is filled with foam adhesive. The foam adhesive can fully fill the gap by expanding freely. After the riverbed is scourted and lowered by the flowing water, the scour protection wall 2 is lowered by its own gravity and protects the pile foundation in real time. During use, the scour protection wall 2 segments are added in time according to the scour speed and the detection cycle and the corresponding isolation layer 3 is filled, so that the pile foundation 1 can be effectively protected.

[0048] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0049] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A scour protection structure for a bridge pile foundation, characterized in that It includes an anti-scour wall (2) and an isolation layer (3). The anti-scour wall (2) is annular and is fitted outside the pile foundation (1). The bottom of the anti-scour wall (2) is in contact with the riverbed (6) and the top of the anti-scour wall (2) is above the water surface (7). The erosion protection wall (2) includes concrete and wall reinforcement bars, wherein the wall reinforcement bars are disposed within the concrete; A gap is provided between the anti-erosion retaining wall (2) and the pile body (1), and the isolation layer (3) is disposed in the gap.

2. The scour protection structure for a bridge pile foundation according to claim 1, wherein The wall reinforcement includes vertical reinforcement (4) and circumferential reinforcement (5). There are multiple vertical reinforcements (4), which are arranged in a ring. The circumferential reinforcement (5) is wrapped around the multiple vertical reinforcements (4).

3. The bridge pile foundation scour prevention structure according to claim 2, characterized in that, The circumferential reinforcing bar (5) is a spiral bar, and the spiral spacing of the circumferential reinforcing bar (5) is 15cm to 25cm.

4. The bridge pile foundation scour prevention structure according to claim 2, characterized in that, The distance between two adjacent vertical reinforcing bars (4) is 25cm to 35cm.

5. The bridge pile foundation scour prevention structure according to claim 2, characterized in that, The vertical reinforcing bar (4) is tied to the circumferential reinforcing bar (5).

6. The scour protection structure for a bridge pile foundation according to claim 1, wherein The erosion protection wall (2) consists of multiple sections, which are stacked coaxially in the vertical direction.

7. The scour protection structure for a bridge pile foundation according to claim 1, wherein The thickness of the anti-erosion retaining wall (2) is greater than 20cm.

8. The scour protection structure for a bridge pile foundation according to claim 1, wherein The isolation layer (3) is sealed and bonded to the pile body (1) and the anti-erosion wall (2) on both sides respectively, and the isolation layer (3) is made of elastic material.

9. A bridge pile foundation scour prevention structure according to claim 8, characterized in that, The isolation layer (3) is made of foam adhesive.

10. The scour protection structure for a bridge pile foundation according to claim 8, wherein The thickness of the isolation layer (3) is greater than 10cm.

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