Bridge pile foundation with good anti-scouring effect

Abstract

The bridge pile foundation with the good anti-scouring effect comprises a pile foundation column, positioning lantern rings are installed at the bottom and in the middle of the pile foundation column, a plurality of telescopic assemblies with the adjustable length are installed on the outer walls of the positioning lantern rings at equal intervals, net clamps are installed at the tail ends of the telescopic assemblies, net sleeves are arranged between the net clamps in a limiting mode, and the net sleeves are connected with the telescopic assemblies. The gravel layer is filled among the pile foundation column, the net sleeve and a riverbed to form an annular structure, under the impact of water flow, the net sleeve can play a preliminary buffering role and slow down direct scouring of the water flow to the gravel layer, and the gravel layer further disperses the energy of the water flow and reduces the speed of the water flow, so that dual protection is formed for the pile foundation column; the anti-scouring capacity of a bridge pile foundation is remarkably improved, the situation that the underwater part of a pile foundation column inclines or is damaged due to local scouring is effectively prevented, a column casing in the telescopic assembly can slide in a sliding groove of a guide rail, a second bolt penetrates through a through hole and a limiting hole and then is connected with a nut, and the column casing can be fixed to the specific position.

Description

Technical Field

[0001] This utility model relates to the field of bridge technology, and in particular to a bridge pile foundation with good scour resistance. Background Technology

[0002] A deep foundation consisting of piles and pile caps connecting the pile tops, or a single pile foundation consisting of columns and piles, is simply called a pile foundation. If the entire pile body is buried in the soil and the bottom of the pile cap is in contact with the soil, it is called a low pile cap pile foundation. If the upper part of the pile body is exposed above the ground and the bottom of the pile cap is above the ground, it is called a high pile cap pile foundation. Building pile foundations are usually low pile cap pile foundations. Pile foundations are widely used in bridge construction.

[0003] Chinese Patent Publication No. CN216041278U discloses a novel anti-scour structure for pile foundations. This structure comprises, from bottom to top, a layer of ribbed geotextile, a layer of bagged sand, and a layer of riprap. The first layer, the ribbed geotextile, reduces the flow of silt and gravel from the seabed. The second layer, the bagged sand, fills scour pits. The third layer, the riprap, is a seamless structure with a certain rigidity. When the three layers are tightly bonded together, they form a rigid, integrated anti-scour structure that adheres to the seabed or riverbed and is also tightly fitted to the pile foundation, making it less prone to scour points. This structure effectively prevents or mitigates scour on the pile foundation and significantly resists the destructive effects of water waves. The three-layer structure of this invention is simple, easy and safe to construct, and has a wide range of applications, including pile foundation protection for cross-sea bridges, offshore platforms, and offshore wind power structures.

[0004] The above-mentioned technology reduces the erosion of the pile foundation by water flow through a three-layer structure. However, the protection required by the sand-ribbed geotextile layer, the bagged sand filling layer and the riprap layer is large, and it only provides effective protection for the bottom of the pile foundation. Therefore, this utility model discloses a bridge pile foundation with good erosion resistance to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a bridge pile foundation with good scour resistance, so as to solve the problem of poor scour resistance of traditional bridge pile foundations mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following solution to the aforementioned technical problems:

[0007] A bridge pile foundation with good erosion resistance includes a pile column. The bottom and middle of the pile column are equipped with positioning collars. Multiple adjustable telescopic components are installed at equal intervals on the outer wall of the positioning collar. The ends of the telescopic components are equipped with mesh clamps. Mesh sleeves are provided between the mesh clamps for limiting the movement. A layer of crushed stone is filled between the pile column, the mesh sleeves and the riverbed.

[0008] As a further embodiment of this utility model, a first threaded cylinder is fixedly embedded in the outer wall of the positioning collar and between adjacent telescopic components. A first bolt is threadedly connected inside the first threaded cylinder, and the end of the first bolt extends into the adjacent reserved hole on the outer wall of the pile column.

[0009] As a further embodiment of this utility model, the telescopic component includes a guide rail fixed to the outer wall of the positioning collar, with sliding grooves on both sides of the guide rail, and a column cylinder slidably connected between the two sliding grooves, and a mesh clamp fixedly connected to the end of the column cylinder away from the guide rail.

[0010] As a further embodiment of this utility model, through holes are provided on both sides of the guide rail, and a second bolt is inserted between the two through holes. Multiple limiting holes are provided at equal intervals between the two side walls of the column. The second bolt passes through the through holes and the limiting holes and is threaded with a nut.

[0011] As a further embodiment of this utility model, each of the mesh clamps has an arc-shaped groove on the side facing the mesh sleeve, and a second threaded cylinder is fixedly embedded on one side of each arc-shaped groove, with a third bolt connected to the inner thread of the second threaded cylinder.

[0012] As a further embodiment of this utility model, the mesh size of the mesh sleeve is smaller than the particle size of the crushed stone in the crushed stone layer.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model discloses a bridge pile foundation with good scour resistance. A crushed stone layer is filled between the pile column, the mesh sleeve, and the riverbed to form a ring structure. Under the impact of water flow, the mesh sleeve can play a preliminary buffering role, slowing down the direct scour of the water flow on the crushed stone layer, while the crushed stone layer further disperses the water flow energy and reduces the water flow velocity, thus forming a double protection for the pile column, significantly improving the scour resistance of the bridge pile foundation, and effectively preventing the underwater part of the pile column from tilting or being damaged due to local scour.

[0015] This utility model discloses a bridge pile foundation with good scour resistance. The column tube in the telescopic component can slide in the groove of the guide rail. After the second bolt passes through the through hole and the limiting hole, it is connected to the nut, which can fix the column tube in a specific position, so that the net clamp can firmly hold the net sleeve. Under different geological conditions and water flow environments, the construction personnel can adjust the length of the telescopic component according to experience, so that the net sleeve can better fit the terrain around the pile column, improve the adaptability and construction effect of the scour resistance structure, and meet the adjustment needs of the distance between the net clamp and the pile column under different construction scenarios. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a side sectional view of a bridge pile foundation with good erosion resistance according to the present invention.

[0018] Figure 2 This is a top sectional view of a bridge pile foundation with good scour resistance according to the present invention.

[0019] Figure 3 This utility model provides a bridge pile foundation with good erosion resistance. Figure 1 Enlarged view of the structure at point A in the image;

[0020] Figure 4 This utility model provides a bridge pile foundation with good erosion resistance. Figure 2 Enlarged view of the structure at point B in the image.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Pile foundation column; 2. Positioning collar; 3. Expansion joint; 4. Net clamp; 5. Net sleeve; 6. Crushed stone layer; 21. First threaded cylinder; 22. First bolt; 31. Guide rail; 32. Column cylinder; 33. Second bolt; 34. Nut; 41. Arc groove; 42. Second threaded cylinder; 43. Third bolt. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments.

[0024] Please see Figure 1-4 This utility model provides a bridge pile foundation with good scour resistance, including a pile column 1. The bottom and middle of the pile column 1 are equipped with positioning collars 2. The outer wall of the positioning collar 2 and located between adjacent expansion components 3 are fixedly embedded with first threaded cylinders 21. The first threaded cylinders 21 are threadedly connected with first bolts 22. The ends of the first bolts 22 extend into adjacent reserved holes on the outer wall of the pile column 1.

[0025] Specifically, the outer wall of the pile column 1 is provided with reserved holes that match the end of the first bolt 22. The end of the first bolt 22 extends into these reserved holes to ensure a firm connection between the positioning collar 2 and the pile column 1, so that the positioning collar 2 will neither move up and down nor rotate.

[0026] Furthermore, multiple length-adjustable telescopic components 3 are equidistantly installed on the outer wall of the positioning collar 2. Each telescopic component 3 includes a guide rail 31 fixed to the outer wall of the positioning collar 2. Both sides of the guide rail 31 are provided with sliding grooves, and a column cylinder 32 is slidably connected between the two sliding grooves. A mesh clamp 4 is fixedly connected to one end of the column cylinder 32 away from the guide rail 31.

[0027] Specifically, under different geological conditions and water flow environments, construction personnel can adjust the length of the expansion joint 3 based on experience, making it suitable for mesh sleeves 5 of different diameters. This allows the mesh sleeve 5 to better conform to the terrain around the pile foundation column 1, improving the adaptability and construction effect of the scour-resistant structure and meeting the adjustment requirements for the distance between the mesh clamp 4 and the pile foundation column 1 under different construction scenarios.

[0028] Furthermore, through holes are provided on both sides of the guide rail 31, and a second bolt 33 is inserted between the two through holes. Multiple limiting holes are provided at equal intervals between the two side walls of the column cylinder 32. The second bolt 33 passes through the through holes and the limiting holes and is threadedly connected to a nut 34.

[0029] Specifically, after moving the column cylinder 32 to a suitable position, align the limiting hole with the through hole of the guide rail 31, then insert the second bolt 33 into the through hole and the limiting hole, and then thread the nut 34 to achieve the positioning of the column cylinder 32 on the guide rail 31. This method is suitable for mesh sleeves 5 of different radii.

[0030] Furthermore, each end of the telescopic component 3 is equipped with a mesh clamp 4, and a mesh sleeve 5 is provided between the mesh clamps 4 for limiting. Each mesh clamp 4 has an arc-shaped groove 41 on the side facing the mesh sleeve 5, and a second threaded cylinder 42 is fixedly embedded on one side of the arc-shaped groove 41. A third bolt 43 is internally threaded into the second threaded cylinder 42.

[0031] Specifically, the shape of the arc groove 41 matches the shape of the mesh sleeve 5, which can increase the contact area between the mesh clip 4 and the mesh sleeve 5 and improve the fixing effect. Tightening the third bolt 43 can insert the third bolt 43 into the mesh hole of the mesh sleeve 5, which can prevent the mesh sleeve 5 from coming out of the arc groove 41 and ensure that the mesh sleeve 5 will not shift or fall off during use.

[0032] Furthermore, a layer of crushed stone 6 is filled between the pile foundation column 1, the mesh sleeve 5 and the riverbed, and the mesh aperture of the mesh sleeve 5 is smaller than the particle size of the crushed stone in the crushed stone layer 6.

[0033] Specifically, the mesh sleeve 5 and the crushed stone layer 6 together constitute a double protection for the pile foundation column 1. The smaller mesh openings of the mesh sleeve 5 first buffer and intercept the water flow, slowing down the water flow speed and blocking silt. Subsequently, the crushed stone layer 6 further disperses the water flow energy, reducing the direct impact of the water flow on the pile foundation column 1. This double protection mechanism significantly improves the scour resistance of the bridge pile foundation, effectively preventing the underwater part of the pile foundation column 1 from tilting or being damaged due to local scour, thus ensuring the safety and stability of the bridge.

[0034] Working principle: In use, a positioning collar 2 is fitted around the pile column 1. Tightening the first bolt 22 on the positioning collar 2 allows the end of the first bolt 22 to be embedded in the reserved hole on the outer wall of the pile column 1, which can limit the height position of the positioning collar 2. Then, the column cylinder 32 is slid outward so that the distance between the mesh clamp 4 and the pile column 1 can reach the expected distance. Tightening the second bolt 33 through the through hole and the limiting hole and then threading the nut 34 can position the mesh clamp 4. Next, the mesh sleeve 5 is embedded between the upper and lower adjacent mesh clamps 4. Tightening the third bolt 43 allows the end of the third bolt 43 to extend into the mesh hole, which can catch the edge of the mesh sleeve 5 to prevent the mesh sleeve 5 from deforming. After that, crushed stone is filled between the pile column 1, the mesh sleeve 5 and the riverbed, which can form a ring-shaped crushed stone layer 6 around the pile column 1, which greatly improves the scour resistance of the bridge pile foundation, ensures the safety of the bridge, and improves the bridge's service life.

Claims

1. A bridge pile foundation with good erosion resistance, comprising a pile column (1), characterized in that, The bottom and middle of the pile foundation column (1) are equipped with positioning collars (2). Multiple adjustable telescopic components (3) are installed at equal intervals on the outer wall of the positioning collar (2). The ends of the telescopic components (3) are equipped with net clamps (4). Net sleeves (5) are provided between the net clamps (4). A layer of crushed stone (6) is filled between the pile foundation column (1), the net sleeves (5) and the riverbed.

2. The bridge pile foundation with good erosion resistance according to claim 1, characterized in that: The outer wall of the positioning collar (2) and between the adjacent telescopic components (3) are fixedly embedded with a first threaded cylinder (21). The first threaded cylinder (21) is threaded with a first bolt (22). The end of the first bolt (22) extends into the adjacent reserved hole on the outer wall of the pile column (1).

3. The bridge pile foundation with good erosion resistance according to claim 1, characterized in that: The telescopic component (3) includes a guide rail (31) fixed to the outer wall of the positioning collar (2). Both sides of the guide rail (31) are provided with sliding grooves, and a column (32) is slidably connected between the two sliding grooves. A mesh clamp (4) is fixedly connected to one end of the column (32) away from the guide rail (31).

4. A bridge pile foundation with good erosion resistance according to claim 3, characterized in that: Both sides of the guide rail (31) are provided with through holes, and a second bolt (33) is inserted between the two through holes. Multiple limiting holes are provided at equal intervals between the two side walls of the column (32). The second bolt (33) passes through the through hole and the limiting hole and is threaded with a nut (34).

5. A bridge pile foundation with good scour resistance according to claim 1, characterized in that: The mesh clamp (4) has an arc-shaped groove (41) on the side facing the mesh sleeve (5), and a second threaded cylinder (42) is fixedly embedded on one side of the arc-shaped groove (41). The second threaded cylinder (42) is internally threaded with a third bolt (43).

6. The bridge pile foundation with good erosion resistance according to claim 1, characterized in that: The mesh size of the mesh sleeve (5) is smaller than the particle size of the crushed stone in the crushed stone layer (6).

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