Anti-scouring device for pile foundation

Abstract

The utility model discloses a pile foundation anti-scour device, which belongs to the technical field of overwater foundation engineering construction and comprises an anti-scour hoop, the anti-scour hoop is in a hollow cylindrical shape and is sleeved on the outer side of a pile foundation, and a plurality of hoop resistance reduction keys are uniformly distributed on the outer surface of the anti-scour hoop; the anti-scour cover is in a hollow circular truncated cone shape, the anti-scour cover and the anti-scour hoop are coaxially arranged, the anti-scour cover is welded to the lower end of the anti-scour hoop, the anti-scour cover is arranged on the mud surface, and a plurality of anti-scour cover resistance reduction keys are evenly distributed on the upper surface of the anti-scour cover. The device effectively solves the problem of riverbed scouring caused by overhigh water flow velocity at the bottom of the pile foundation, meanwhile, the effects of preventing corrosion and improving the structural strength are achieved for the pile foundation near the mud surface, in addition, the device is convenient to install and construct on site, and guarantees are provided for the structural safety of the subsequent pile foundation.

Description

Technical Field

[0001] This utility model relates to the field of construction technology for water foundation engineering, and in particular to a pile foundation anti-scour device. Background Technology

[0002] In water-based foundation engineering projects such as bridges and ports, pile foundations are a crucial type of foundation structure, and their stability directly affects the safety and service life of the entire project. However, under the scouring action of water flow, the bottom of the pile foundation and the area near the mud surface are prone to severe scouring due to excessive water flow velocity, leading to the loss of soil around the pile foundation and consequently affecting its bearing capacity and stability. This problem is particularly prominent in environments with complex hydrodynamic conditions, such as rivers and ports, and can even lead to engineering accidents.

[0003] Traditional scour prevention measures for pile foundations mainly include riprap protection, concrete bottom protection, and steel casing. However, these methods have many problems in practical applications: First, riprap protection and concrete bottom protection are complex to construct, require large amounts of materials, and are prone to erosion and failure after long-term use; second, while steel casings offer some protection, they are expensive, difficult to construct, and difficult to adapt to different pile diameters and construction environments. Furthermore, existing scour prevention devices often cannot simultaneously achieve multiple functions such as scour prevention, corrosion prevention, and structural strength enhancement, leaving safety hazards in pile foundations under complex hydrological conditions. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a pile foundation anti-scouring device, which can solve the problem of riverbed scouring caused by excessive water flow velocity at the bottom of the pile foundation, and at the same time play a role in preventing corrosion and increasing the structural strength of the pile foundation near the mud surface.

[0005] According to an embodiment of the present invention, a pile foundation anti-scour device includes: an anti-scour clamp, which is a hollow cylinder and is fitted on the outside of the pile foundation, with a plurality of clamp drag-reducing keys evenly distributed on the outer surface of the anti-scour clamp; and an anti-scour cover, which is a hollow frustum-shaped cylinder and is coaxially arranged with the anti-scour clamp, welded to the lower end of the anti-scour clamp, and placed on the mud surface, with a plurality of anti-scour cover drag-reducing keys evenly distributed on the upper surface of the anti-scour cover.

[0006] The pile foundation scour prevention device according to the embodiments of this utility model has at least the following beneficial effects: This pile foundation scour prevention device effectively solves the safety hazards caused by water scour at the bottom of the pile foundation and near the mud surface, while also taking into account functions such as corrosion prevention and strengthening of structural strength, providing reliable protection for the safety and durability of pile foundation projects. It effectively solves the problem of riverbed scour at the bottom of the pile foundation caused by excessive water flow velocity, and at the same time plays a role in corrosion prevention and increasing structural strength of the pile foundation near the mud surface. In addition, this device is easy to install on-site, providing a guarantee for the structural safety of the subsequent pile foundation.

[0007] According to some embodiments of this utility model, the anti-impact clamp is formed by splicing two semi-cylindrical pieces. Both semi-cylindrical pieces are bent outwards and have connecting parts. Bolt holes are opened on the connecting parts, and bolts are inserted into the bolt holes to splice the two semi-cylindrical pieces together.

[0008] According to some embodiments of this utility model, the anti-erosion cover is formed by splicing two semi-circular frustum pieces, and the two semi-circular frustum pieces are welded to the lower ends of two semi-cylindrical pieces respectively.

[0009] According to some embodiments of this utility model, the angle between the anti-erosion cover and the mud surface is 15 degrees.

[0010] According to some embodiments of this utility model, the height of the anti-impact clamp is 1.5 to 2 times the pile diameter.

[0011] According to some embodiments of this utility model, the adjacent upper and lower rows of clamping drag-reducing keys are staggered.

[0012] According to some embodiments of this utility model, the length, width, and height of the clamping drag reduction key are 4cm, 4cm, and 6cm, respectively.

[0013] According to some embodiments of this utility model, the length, width, and height of the anti-impact shield drag reduction key are 4cm, 4cm, and 6cm, respectively.

[0014] 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

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of the pile foundation anti-scour device according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle.

[0018] Figure label:

[0019] Anti-impact clamp 100; clamp drag reduction key 110; semi-cylindrical plate 120; connecting part 130; bolt hole 140;

[0020] 200mm anti-erosion cover; 210mm anti-erosion cover drag reduction key; 220mm semi-circular plate;

[0021] Pile foundation 1; mud surface 2. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] refer to Figures 1 to 2 This invention describes a pile foundation anti-scouring device according to an embodiment of the present invention.

[0026] like Figures 1 to 2As shown, the pile foundation scour prevention device according to an embodiment of this utility model includes: a scour prevention clamp 100, which is a hollow cylinder and is fitted onto the outside of the pile foundation 1. Multiple clamp drag-reducing keys 110 are evenly distributed on the outer surface of the scour prevention clamp 100. A scour prevention cover 200, which is a hollow frustum-shaped cone and is coaxially arranged with the scour prevention clamp 100. The scour prevention cover 200 is welded to the lower end of the scour prevention clamp 100 and is disposed on the mud surface 2. Multiple scour prevention cover drag-reducing keys 210 are evenly distributed on the upper surface of the scour prevention cover 200. Through the combined design of the scour prevention clamp 100 and the scour prevention cover 200, the bottom of the pile foundation 1 and the area near the mud surface 2 can be effectively protected, preventing soil loss due to water erosion, while simultaneously enhancing the structural strength and durability of the pile foundation 1. The drag-reducing key design of the anti-scour clamp 100 and the anti-scour cover 200 can interfere with the water flow field and reduce the impact force of the water flow on the pile foundation 1, thereby significantly reducing the scour phenomenon.

[0027] Therefore, this pile foundation scour prevention device effectively solves the safety hazards caused by water scouring at the bottom of pile 1 and near the mud surface 2, while also providing corrosion protection and structural strength enhancement, thus providing reliable protection for the safety and durability of pile foundation 1. It effectively solves the problem of riverbed scouring at the bottom of pile 1 caused by excessive water flow velocity, and also provides corrosion protection and structural strength enhancement for pile foundation 1 near the mud surface 2. Furthermore, this device is easy to install on-site, ensuring the structural safety of pile foundation 1 subsequently.

[0028] like Figure 2 As shown, the anti-scouring clamp 100 is formed by splicing two semi-cylindrical plates 120. Both semi-cylindrical plates 120 are bent outwards to form connecting portions 130. Bolt holes 140 are provided on the connecting portions 130, and bolts are inserted into the bolt holes 140 to join the two semi-cylindrical plates 120 together. The design of the anti-scouring clamp 100 using two semi-cylindrical plates 120 facilitates on-site installation. The bolted connection method not only simplifies operation but also ensures the stability and tightness of the device, preventing loosening due to water flow impact, thereby guaranteeing the long-term safety of the pile foundation 1.

[0029] like Figure 1 As shown, the scour shield 200 is formed by splicing two semi-circular frustum pieces 220, which are welded to the lower ends of two semi-cylindrical pieces 120. The design of the scour shield 200 using two semi-circular frustum pieces 220 matches the splicing method of the scour clamp 100, facilitating transportation and installation. This modular design can adapt to pile foundations 1 of different sizes, while improving construction flexibility and reducing construction difficulty.

[0030] In some specific embodiments of this utility model, the angle between the anti-scour cover 200 and the mud surface 2 is 15 degrees. This approximately 15-degree angle optimizes the water flow field and reduces the direct impact of the water flow on the bottom of the pile foundation 1. This inclined design also guides the water flow to disperse to both sides, further reducing the risk of scour and enhancing the stability and protective effect of the device.

[0031] In some specific embodiments of this utility model, the height of the anti-scour clamp 100 is 1.5 to 2 times the diameter of the pile foundation 1. The height design of the anti-scour clamp 100, which is 1.5 to 2 times the diameter of the pile foundation 1, effectively covers the critical area near the mud surface 2, ensuring the stability of the pile foundation 1 under water erosion. This height design provides sufficient protection while avoiding material waste, exhibiting high economic efficiency and practicality.

[0032] like Figure 1 As shown, the adjacent upper and lower rows of drag-reducing clamps 110 are staggered. This staggered arrangement of the upper and lower rows of drag-reducing clamps 110 can more evenly disturb the water flow field and avoid the formation of concentrated impact points. This arrangement can significantly reduce the risk of local scouring of the pile foundation 1 by the water flow, while enhancing the overall drag reduction effect of the device.

[0033] In some specific embodiments of this utility model, the length, width, and height of the clamp drag-reducing key 110 are 4cm, 4cm, and 6cm, respectively. After optimization, it can effectively interfere with the upward flow field of the water flow and reduce the impact force of the water flow on the pile foundation 1. This size design ensures the drag reduction effect while avoiding excessive structural complexity, making it easy to process and install. The length, width, and height of the anti-scour cover drag-reducing key 210 are 4cm, 4cm, and 6cm, respectively. It can be evenly arranged on the upper surface of the anti-scour cover 200, radiating from the center to the edge, effectively interfering with the water flow streamline and reducing the scouring of the bottom of the pile foundation 1 by the water flow. This size design ensures the drag reduction effect while improving the overall protective performance of the device.

[0034] The process of installing the anti-scouring device for this pile foundation is as follows:

[0035] Step 1: Locating and cleaning pile foundation 1. Determine the location of pile foundation 1 and ensure that the surface of pile foundation 1 is clean and free of debris. Clean the surface of pile foundation 1 near the mud surface 2 line, remove loose soil, debris, etc., and ensure that the anti-scouring clamp 100 can fit tightly against the surface of pile foundation 1.

[0036] Step 2: Around the pile foundation 1 near the mud surface 2, construct clay or solidified soil according to the shape of the anti-erosion cover 200.

[0037] Step 3: Weld the semi-cylindrical piece 120 and the semi-circular platform piece 220 together on land. Connect the anti-scour clamp 100 and the anti-scour cover 200 with bolts at the water-borne part of the pile foundation 1 to form a pile foundation anti-scour device. At this time, the bolts should not be tightened too much to ensure that the anti-scour device can slide down the pile foundation 1 to the mud surface 2.

[0038] Step 4: Use a steel wire rope to pull the pile foundation anti-scour device down slowly to the mud surface 2, and adjust the position and posture of the anti-scour device to fit closely with the anti-scour material in Step 2.

[0039] Step 5: The diver tightens the bolts of the anti-scour clamp 100 underwater to ensure that the anti-scour clamp 100 fits tightly against the pile foundation 1.

[0040] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An erosion protection device for a pile foundation, characterized in that include: Anti-impact clamp (100), the anti-impact clamp (100) is a hollow cylinder, the anti-impact clamp (100) is sleeved on the outside of the pile foundation (1), and multiple clamp drag reduction keys (110) are evenly distributed on the outer surface of the anti-impact clamp (100). The anti-erosion cover (200) is in the shape of a hollow frustum. The anti-erosion cover (200) is coaxially arranged with the anti-erosion clamp (100). The anti-erosion cover (200) is welded to the lower end of the anti-erosion clamp (100). The anti-erosion cover (200) is set on the mud surface (2). Multiple anti-erosion cover drag reduction keys (210) are evenly distributed on the upper surface of the anti-erosion cover (200).

2. A scour protection device for a pile foundation according to claim 1, characterised in that The anti-impact clamp (100) is formed by splicing two semi-cylindrical pieces (120). Both semi-cylindrical pieces (120) are bent outward to have a connecting part (130). The connecting part (130) is provided with a bolt hole (140). The bolt is inserted in the bolt hole (140) to splice the two semi-cylindrical pieces (120).

3. A scour protection device for a pile foundation according to claim 2, characterised in that The anti-erosion cover (200) is formed by splicing two semi-circular frustum pieces (220), and the two semi-circular frustum pieces (220) are welded to the lower ends of the two semi-cylindrical pieces (120).

4. A scour protection device for a pile foundation according to claim 1, characterised in that The angle between the anti-erosion cover (200) and the mud surface (2) is 15 degrees.

5. A scour protection device for a pile foundation according to claim 1, characterised in that The height of the anti-impact clamp (100) is 1.5 to 2 times the diameter of the pile foundation (1).

6. A scour protection device for a pile foundation according to claim 1, characterised in that The adjacent upper and lower rows of the clamp drag reduction keys (110) are staggered.

7. A scour protection device for a pile foundation according to claim 1, characterised in that The length, width, and height of the clamp drag reduction key (110) are 4cm, 4cm, and 6cm, respectively.

8. A scour protection device for a pile foundation according to claim 1, characterised in that The length, width, and height of the anti-impact shield drag reduction key (210) are 4cm, 4cm, and 6cm, respectively.

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