Anti-fouling device for hollow piles

Abstract

The utility model relates to the technical field of pile foundation engineering construction, disclose a kind of hollow pile antifouling device, including cover, convex ring, elastic washer nest box convex portion.Cover is circular, its diameter is compatible with the outer diameter of hollow pile.Convex ring is cylinder structure, is fixed on cover and is coaxially arranged with cover.Convex ring's outer diameter is less than the inner diameter of hollow pile.Elastic washer nest is cylinder structure, its inner diameter is compatible with the outer diameter of convex ring, its outer diameter is compatible with the inner diameter of hollow pile.Elastic washer nest is set on the outer periphery of convex ring.Convex portion, it is set on the outer periphery of elastic washer nest.Convex portion is relatively protruded along the radial direction of elastic washer nest, so that when convex ring is inserted into hollow pile, convex portion and hollow pile inner wall form interference fit.The device does not need to process positioning groove, can realize the stable fixation of washer, to ensure the prerequisite of antifouling effect, with the advantages of simple processing, low cost and high reliability.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation engineering construction technology, and specifically to a hollow pile anti-pollution device. Background Technology

[0002] With the development of construction engineering, prestressed concrete hollow piles (PHC piles, etc.) are widely used due to their advantages such as factory production, fast construction speed, and high bearing capacity. During pile foundation construction, especially in soft soil areas or areas with high groundwater levels, the top of the pile hole is left open after the last pile section is driven into the soil. If not effectively sealed, soil, mud, and debris from the construction site can easily fall into the pile hole during subsequent operations, requiring additional manpower and resources for cleanup and delaying the overall construction period.

[0003] Currently, common temporary sealing methods include using simple wooden boards or steel sheets to cover the top of the pile hole. However, these existing technologies all have obvious drawbacks: the simple coverings are easily moved or lost under mechanical disturbances such as earthwork excavation, and completely lose their anti-fouling function. To address this issue, existing technology employs an embedded circular steel plate with a rolled-edge washer, which is then inserted into the hollow pile using friction. However, this approach has an inherent drawback: during the insertion or removal of the pile plug from the pile hole, the axial friction between the washer and the hole wall can easily cause the washer to flip inwards or outwards, slide, or even detach completely. Once the washer falls into the deep pile hole, it becomes difficult to remove, resulting in loss of its anti-fouling function and potentially affecting subsequent work.

[0004] To prevent the gasket from flipping and falling off, one improvement is to machine an annular groove into the rolled edge, embedding the gasket within the groove for positioning. However, this introduces new problems: machining the groove adds extra manufacturing steps and costs; at the same time, the groove weakens the structural strength of the rolled edge (especially when it is a thin-walled steel ring), potentially leading to deformation or damage when subjected to installation hammer blows or soil pressure. Utility Model Content

[0005] In view of the above-mentioned shortcomings or defects in the existing technology, the present invention provides a hollow pile anti-fouling device. This device can achieve stable fixing of the gasket without processing positioning grooves, thus ensuring the anti-fouling effect while having the advantages of simple processing, low cost and high reliability.

[0006] To achieve the above objectives, this utility model provides a hollow pile anti-pollution device, comprising: The cover plate is circular, and its diameter is adapted to the outer diameter of the hollow pile; The convex ring is a cylindrical structure, fixed to the cover plate and coaxially arranged with the cover plate; the outer diameter of the convex ring is smaller than the inner diameter of the hollow pile; The elastic washer sleeve has a cylindrical structure, with its inner diameter matching the outer diameter of the convex ring and its outer diameter matching the inner diameter of the hollow pile; the elastic washer sleeve is fitted around the outer circumference of the convex ring; A protrusion is provided on the outer periphery of the elastic washer sleeve; the protrusion protrudes radially from the elastic washer sleeve so that when the protruding ring is inserted into the hollow pile, the protrusion forms an interference fit with the inner wall of the hollow pile.

[0007] Furthermore, the protrusion is an annular protrusion surrounding the outer periphery of the elastic washer sleeve.

[0008] Furthermore, the annular protrusions are provided in multiple portions, and the multiple annular protrusions are distributed at intervals along the axial direction of the elastic washer sleeve.

[0009] Furthermore, the cross-section of the annular convex ridge is wedge-shaped.

[0010] Furthermore, the protrusion includes a plurality of protrusions spaced apart circumferentially along the outer peripheral wall of the elastic washer.

[0011] Furthermore, along the radial direction of the elastic washer sleeve, the ratio of the protrusion height of the protrusion to the thickness of the elastic washer sleeve is set to be greater than or equal to 0.4 and less than or equal to 0.8.

[0012] Furthermore, the elastic washer sleeve is made of rubber or silicone.

[0013] Furthermore, the elastic washer sleeve is integrally formed with the protrusion.

[0014] Furthermore, the cover plate is a circular thin steel plate, and the convex ring is an annular thin steel plate.

[0015] Furthermore, the cover plate and the convex ring are connected by a bevel weld, and the weld leg height of the weld is set to be greater than or equal to 4 mm and less than or equal to 8 mm.

[0016] The hollow pile anti-pollution device, which applies the above-mentioned technical solution of this utility model, has the following effects: The cover plate, as the main load-bearing and covering component, has a diameter adapted to the outer diameter of the hollow pile to completely cover the pile opening, preventing external debris, sewage, or organisms from directly entering the pile body. The elastic washer sleeve and the protrusion work together to provide sufficient friction, preventing the device from accidentally detaching from the pile opening during construction due to excavator work, and the elastic washer sleeve and protrusion are not prone to slipping off the convex ring. Furthermore, it effectively prevents silt or sand from entering the hollow pile hole along the gap between the pile wall and the device. This device effectively prevents silt or sand from falling into the hollow pile hole during construction, and it is simple in structure, easy to process, and quick to install; it also effectively fixes the washer, avoiding the risk of the elastic washer sleeve falling off and into the hollow pile hole.

[0017] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of one embodiment of the present invention; Figure 2 This is an exploded view of the components of one embodiment of the present invention; Figure 3 This is another exploded schematic diagram of one embodiment of the present invention; Figure 4 This is a schematic cross-sectional view of the convex ring according to one embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures 1-Pile driver; 2-Cover plate; 3-Weld; 4-Elastic washer sleeve; 4a-Protrusion; 5-Protruding ring; 6-Hollow pile. Detailed Implementation

[0020] The specific embodiments of this utility model are described in detail below. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0021] In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] like Figures 1 to 4 As shown, this utility model provides a dirt-proof device for a hollow pile 6, including a cover plate 2, a convex ring 5, an elastic washer sleeve 4, and a protrusion 4a. The cover plate 2 is circular, and its diameter is adapted to the outer diameter of the hollow pile 6. The convex ring 5 is a cylindrical structure, fixed on the cover plate 2 and coaxially arranged with the cover plate 2. The outer diameter of the convex ring 5 is smaller than the inner diameter of the hollow pile 6. The elastic washer sleeve 4 is a cylindrical structure, and its inner diameter is adapted to the outer diameter of the convex ring 5, while its outer diameter is adapted to the inner diameter of the hollow pile 6. The elastic washer sleeve 4 is fitted around the outer periphery of the convex ring 5. The protrusion 4a is provided on the outer periphery of the elastic washer sleeve 4. The protrusion 4a protrudes radially from the elastic washer sleeve 4 so that when the convex ring 5 is inserted into the hollow pile 6, the protrusion 4a forms an interference fit with the inner wall of the hollow pile 6.

[0024] During the pile foundation construction phase, when static pressure is applied to the last hollow pile 6, the protruding ring 5 of the device is aligned and inserted into the pile hole of the hollow pile 6. Slight hammering is applied to allow the protruding ring 5 and the elastic washer sleeve 4 to be fully engaged in the pile hole of the hollow pile 6, and the cover plate 2 to contact the top of the hollow pile 6, allowing subsequent construction to begin. During subsequent construction, the pile driver 1 presses down on the top surface of the cover plate 2, transferring pressure to the hollow pile 6 to move it to the predetermined position. In the subsequent foundation pit excavation phase, after excavating to expose the top of the hollow pile 6 and the device, a pry bar is used to separate the device entirely from the hollow pile 6, allowing for its recovery and reuse.

[0025] In the above scheme, the cover plate 2 serves as the main load-bearing and covering component. Its diameter is adapted to the outer diameter of the hollow pile 6 to completely cover the pile opening, so as to prevent external debris, sewage or organisms from directly entering the pile body. Moreover, its top surface is relatively flat and has sufficient strength and rigidity to withstand the load when the pile driver 1 is pressed down during construction.

[0026] The convex ring 5, serving as a support and positioning skeleton, is firmly fixed to the center of the cover plate 2, and is used to support and position the elastic washer sleeve 4. The elastic washer sleeve 4, as a key sealing and fixing component, has its inner wall tightly fitted against the outer wall of the convex ring 5, while its outer wall contacts the inner wall of the hollow pile 6 through its protrusion 4a. When the entire device is pressed into the top of the hollow pile 6, the protrusion 4a of the elastic washer sleeve 4 is squeezed by the inner wall of the hollow pile 6, causing radial elastic deformation of both the elastic washer sleeve 4 and the protrusion 4a. This deformation allows the protrusion 4a to continuously and tightly press against the inner wall of the hollow pile 6, forming an interference fit. The protrusion 4a provides sufficient friction to prevent the device from accidentally detaching from the pile opening during construction due to excavator work; it also effectively prevents silt or sand from entering the hollow pile 6 hole along the gap between the pile wall and the device.

[0027] Furthermore, since the elastic washer sleeve 4 is pre-fitted onto the convex ring 5, the outer wall of the convex ring 5 provides rigid support for the elastic washer sleeve 4. This support fundamentally constrains the elastic washer sleeve 4 from radially wrinkling or inwardly flipping when subjected to axial installation friction or subsequent disturbances, thus stably confining the elastic washer sleeve 4 in the predetermined position. When removing the entire device from the hollow pile 6, the cylindrical structure of the elastic washer sleeve 4 makes it difficult for it to flip over, and the friction between the elastic washer sleeve 4 and the convex ring 5 effectively prevents the elastic washer sleeve 4 from accidentally slipping off.

[0028] With the above-mentioned design, the device can effectively prevent silt or sand from falling into the six holes of the hollow pile during construction. It is simple in structure, easy to process, and quick to install. It also achieves effective fixation of the gasket, avoiding the risk of the elastic gasket sleeve 4 falling off and into the pile hole of the hollow pile 6.

[0029] Understandably, the dimensions of the convex ring 5, cover plate 2, elastic washer sleeve 4, and protrusion 4a can be flexibly adjusted according to the hollow pile 6 model. Specifically, taking the anti-fouling device adapted to the PHC-500-120-AB pile as an example, the outer diameter of the hollow pile 6 is 500mm, and the inner diameter is 260mm. The cover plate 2 has a diameter of 500mm and a thickness of 6mm. The convex ring 5 has an inner diameter of 238mm, an outer diameter of 250mm, and a height of 50mm. The elastic washer sleeve 4 has an inner diameter of 250mm, an outer diameter of 260mm, a thickness of 5mm, and a height of 40mm. The protrusion 4a protrudes radially along the elastic washer sleeve 4 with a height of 3mm.

[0030] like Figure 4 As shown, in one possible embodiment, the protrusion 4a is an annular ridge surrounding the outer periphery of the elastic washer sleeve 4. Multiple annular ridges are provided, and these ridges are spaced apart along the axial direction of the elastic washer sleeve 4. The cross-section of the annular ridge is wedge-shaped.

[0031] In the above scheme, when the device is pressed into the pile hole, the wedge-shaped annular protrusions first contact the edge of the pile opening with their inclined surfaces, facilitating pressing. As the pressing depth increases, each annular protrusion undergoes independent radial elastic compression, thereby forming multiple parallel sealing and friction contact zones at multiple axial positions. The wedge-shaped cross-section of the protrusions gives them a gradually varying thickness in the radial direction; their tips are more easily deformed to adapt to the pile diameter, while the thicker root provides sufficient resilience and structural strength.

[0032] Through the above-described configuration, multi-stage sealing is achieved by employing multiple axially spaced wedge-shaped annular protrusions, enhancing the device's adaptability to the inner wall of the hollow pile 6. The wedge-shaped protrusions ensure smoother installation and disassembly of the device while maintaining friction.

[0033] Understandably, the number of annular protrusions can be flexibly adjusted according to the size of the hollow pile 6. In this embodiment, five annular protrusions are provided. The cross-sectional shape of the annular protrusions can also be semi-circular, trapezoidal, or rectangular, etc.

[0034] In one possible implementation, the protrusion 4a comprises a plurality of protrusions spaced circumferentially along the outer peripheral wall of the elastic washer sleeve 4. These protrusions are circumferentially separated from each other, rather than forming a continuous annular structure. This structure allows air to escape more easily from the pile hole during installation, making the pressing operation smoother.

[0035] In one possible implementation, the ratio of the protrusion height of the protrusion 4a to the thickness of the elastic washer sleeve 4 along the radial direction of the elastic washer sleeve 4 is set to be greater than or equal to 0.4 and less than or equal to 0.8.

[0036] In the above scheme, the height range of the protrusion 4a ensures that it can generate sufficient and effective elastic deformation when squeezed by the inner wall of the hollow pile 6, thereby generating the necessary radial clamping force to achieve a reliable interference fit; and it will not be difficult to insert into the hole of the hollow pile 6 due to excessive protrusion height. Further, along the radial direction of the elastic washer sleeve 4, the ratio of the protrusion height of the protrusion 4a to the thickness of the elastic washer sleeve 4 is set to be greater than or equal to 0.5 and less than or equal to 0.7. In this embodiment, the ratio of the protrusion height of the protrusion 4a to the thickness of the elastic washer sleeve 4 is set to 0.6.

[0037] In one possible implementation, the elastic washer sleeve 4 and the protrusion 4a are integrally formed. Both the elastic washer sleeve 4 and the protrusion 4a are made of rubber or silicone.

[0038] Through the above-described design, the integral molding of the elastic washer sleeve 4 and the protrusion 4a simplifies the manufacturing process. It eliminates the need for additional fixing of the protrusion 4a to the elastic washer sleeve 4 and effectively avoids the risk of the protrusion 4a detaching from the elastic washer sleeve 4. Using rubber or silicone as the material fully utilizes their excellent elastic sealing performance and high coefficient of friction, ensuring that the device maintains sufficient friction and sealing capacity under different operating conditions. Rubber or silicone materials are relatively inexpensive, readily available, and have mature processing technology, enabling the entire device to maintain economic efficiency while achieving high performance.

[0039] Understandably, rubber materials can be selected from natural rubber, styrene-butadiene rubber, neoprene rubber, etc., to meet different application requirements. Silicone materials, on the other hand, can be selected from silicone of different hardness grades to adapt to different compression set requirements.

[0040] In one possible implementation, the cover plate 2 is a circular thin steel plate, and the convex ring 5 is an annular thin steel plate; the cover plate 2 and the convex ring 5 are connected by bevel welding, and the weld leg height of the weld 3 is set to be greater than or equal to 4 mm and less than or equal to 8 mm.

[0041] In the above scheme, both the cover plate 2 and the convex ring 5 are made of thin steel plates to ensure that the device can withstand the load generated by the downward pressure of the pile driver 1 during construction and to prevent plastic deformation of the cover plate 2. Furthermore, steel plates are readily available and easy to process. The bevel welding method ensures a firm fixation between the cover plate 2 and the convex ring 5. The weld leg height of the weld 3 is set to be greater than or equal to 4mm and less than or equal to 8mm, ensuring that the weld 3 can withstand various construction loads and meet the structural strength requirements without affecting the structural integrity and strength of the cover plate 2 and the convex ring 5. In this embodiment, the weld leg height of the weld 3 is set to 6mm.

[0042] The specific construction process for applying this device is as follows: Prepare multiple hollow piles 6, with steel end plates pre-embedded at both ends of each hollow pile 6, and the bottom end of the first hollow pile 6 is equipped with a pile tip. Position the first hollow pile 6 and drive it into the foundation at the construction site using the pile driver 1; When the top of the previous hollow pile 6 sinks to a predetermined height above the ground surface, the next hollow pile 6 is hoisted so that the steel end plate at the bottom of the next hollow pile 6 is aligned and connected with the steel end plate at the top of the previous hollow pile 6. The steel end plates of the two hollow pile sections 6 are fixedly connected and driven into the pile by the pile driver 1; specifically, the two hollow pile sections 6 can be fixed by welding or snap-fit ​​connection. Repeat the pile driving and connect the subsequent hollow piles 6 in sequence, directly to the last hollow pile 6; Align the protruding ring 5 of the anti-pollution device of the hollow pile 6 with the pile hole of the last section of the hollow pile 6, hammer the anti-pollution device of the hollow pile 6 to insert the protruding ring 5 into the pile hole, and make the cover plate 2 fit with the steel end plate of the last section of the hollow pile 6. The anti-fouling device of the hollow pile 6 and the last section of the hollow pile 6 are sunk to the predetermined design depth using the pile driver 1.

[0043] This construction process ensures that the anti-fouling device for the hollow pile 6 plays a role in preventing pollution when the last section of the hollow pile 6 is constructed, preventing sand and soil from falling into the pile hole during construction, and avoiding additional costs and delays in subsequent cleaning.

[0044] It should be noted that the predetermined height is set to be greater than or equal to 0.3m and less than or equal to 1.0m. Setting the predetermined height to be greater than or equal to 0.3m prevents sand or silt from falling into the pile hole of hollow pile 6; setting the predetermined height to be less than or equal to 1.0m facilitates the hoisting of the next section of hollow pile 6 by the crane, makes it easier for construction personnel to align and fix the steel end plate at the top of the pile, and ensures that the part of hollow pile 6 inserted below the ground surface will not shake at the top.

[0045] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0046] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0047] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A hollow pile anti-pollution device, characterized in that, include: The cover plate (2) is circular, and its diameter is adapted to the outer diameter of the hollow pile (6); The convex ring (5) is a cylindrical structure, fixed on the cover plate (2) and coaxially arranged with the cover plate (2); the outer diameter of the convex ring (5) is smaller than the inner diameter of the hollow pile (6); The elastic washer sleeve (4) is a cylindrical structure, and its inner diameter is adapted to the outer diameter of the convex ring (5), and its outer diameter is adapted to the inner diameter of the hollow pile (6); the elastic washer sleeve (4) is fitted on the outer circumference of the convex ring (5); A protrusion (4a) is provided on the outer periphery of the elastic washer sleeve (4); the protrusion (4a) protrudes radially relative to the elastic washer sleeve (4) so ​​that when the protruding ring (5) is inserted into the hollow pile (6), the protrusion (4a) forms an interference fit with the inner wall of the hollow pile (6).

2. The hollow pile anti-pollution device according to claim 1, characterized in that, The protrusion (4a) is an annular protrusion surrounding the outer periphery of the elastic washer sleeve (4).

3. The anti-pollution device for hollow piles according to claim 2, characterized in that, The annular protrusions are configured as a plurality of them, and the plurality of annular protrusions are distributed at intervals along the axial direction of the elastic washer sleeve (4).

4. The anti-pollution device for hollow piles according to claim 2, characterized in that, The cross-section of the annular protrusion is wedge-shaped.

5. The anti-pollution device for hollow piles according to claim 1, characterized in that, The protrusion (4a) includes a plurality of protrusions spaced circumferentially along the outer peripheral wall of the elastic washer sleeve (4).

6. The anti-pollution device for hollow piles according to claim 1, characterized in that, Along the radial direction of the elastic washer sleeve (4), the ratio of the protrusion height of the protrusion (4a) to the thickness of the elastic washer sleeve (4) is set to be greater than or equal to 0.4 and less than or equal to 0.

8.

7. The anti-pollution device for hollow piles according to claim 1, characterized in that, The elastic washer sleeve (4) is made of rubber or silicone.

8. The anti-pollution device for hollow piles according to claim 1, characterized in that, The elastic washer sleeve (4) and the protrusion (4a) are integrally formed.

9. The anti-pollution device for hollow piles according to claim 1, characterized in that, The cover plate (2) is a circular thin steel plate, and the convex ring (5) is an annular thin steel plate.

10. The anti-pollution device for hollow piles according to claim 9, characterized in that, The cover plate (2) and the convex ring (5) are connected by bevel welding, and the height of the weld leg of the weld (3) is set to be greater than or equal to 4 mm and less than or equal to 8 mm.

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