Bridge underwater pile foundation

Abstract

The present invention relates to an underwater bridge pile foundation, and relates to the technical field of pile foundations. It comprises: a pile foundation and a cap, wherein the pile foundations are formed into two symmetrical groups, and the cap is disposed on the top of the two groups of pile foundations; a protective structure is disposed on the upper end of the pile foundation to prevent the impact and accumulation of surface garbage; the protective structure comprises a protective plate and a fan plate that encloses the protective plate to protect the pile foundation; when the fan plate is fanned, it stirs up water flow to remove garbage accumulated around the protective structure; a table top edge is disposed on the top surface of the cap, and both sides of the table top edge protrude from both sides of the cap to form an outer edge structure; ballast water storage space is disposed between both sides of the cap and the table top edge, and the ballast water storage space is configured to increase the weight of the water on this side during the process of water flowing in and out.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundations, in particular to underwater pile foundations for bridges. Background Art

[0002] Underwater pile foundations are constructed underwater and are primarily used for the foundation construction of structures such as highway bridges and culverts within water bodies such as rivers, lakes, and ponds. Underwater pile foundations involve sinking the pile body into the water by drilling or punching holes, followed by concrete pouring to ensure the stability and bearing capacity of the bridge foundation. The number and arrangement of piles in the foundation should be determined based on the superstructure and load conditions. Under-column pile foundations can consist of a single pile or a group of piles arranged in a polygonal shape.

[0003] In the existing technology, the structural form of the pile foundation is generally a vertical columnar structure, which can be prismatic or cylindrical. After the underwater pile foundation is put into use, in addition to routine inspections to test various indicators of the pile foundation, it is also necessary to face the impact of water flow and the collision and accumulation of floating garbage on the water surface for a long time. The collision will cause damage to the pile foundation and affect the stability of the structure. The accumulation of garbage will increase the resistance to water flow around the pile foundation and increase the stress on the pile foundation. It has great potential risks and is also a big test for the stability of the bridge structure.

[0004] Therefore, based on the above technical problems, technicians in this field urgently need to develop underwater pile foundations for bridges. Summary of the Invention

[0005] The purpose of the present invention is to provide an underwater pile foundation for a bridge in order to solve the above problems.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The underwater pile foundation of the bridge of the present invention comprises:

[0008] Pile foundations and caps, the pile foundations are two symmetrical groups, and the caps are set on top of the two groups of pile foundations;

[0009] A protective structure is provided at the upper end of the pile foundation to prevent the impact and accumulation of garbage on the water surface. The protective structure includes a protective plate and a fan plate that surrounds the protective plate to protect the area around the pile foundation. When the fan plate is fanned, it generates water flow to remove the garbage accumulated around the protective structure through the water flow.

[0010] The top surface of the support platform is provided with an outer edge of the platform, and both sides of the outer edge of the platform protrude from both sides of the support platform to form an outer edge structure. Ballast water holding space is provided between both sides of the support platform and the outer edge of the platform, and the ballast water holding space is used to increase the weight of the water on this side during the process of flowing in and out.

[0011] Furthermore, the pile foundation includes a main load-bearing pile body and an arc surface pile body, and the arc surface pile body is vertically arranged on one side surface of the main load-bearing pile body along the main load-bearing pile body. In the two symmetrical groups of pile foundations, the two groups of arc surface pile bodies are distributed on the opposite side surfaces of the two groups of main load-bearing pile bodies.

[0012] Furthermore, the protective plate surrounds the side surface of the main load-bearing pile body except the side where the arc surface pile body is located, and the inner side of the protective plate and the side surface of the main load-bearing pile body are connected and supported by a first vertical rib.

[0013] Furthermore, a second vertical rib is provided on the arc surface of the arc pile body opposite to the arc surface of the main load-bearing pile body, and the fanning plates are provided on both sides of the second vertical rib. One end of the fanning plate is hinged on the side surface of the second vertical rib, and the other end can be swung and can be swung to overlap the outer side of the protective plate. The two groups of the fanning plates and the protective plate form an enclosure to protect the area around the pile foundation.

[0014] Furthermore, a limit block is provided on one end of the second vertical rib opposite to the arc surface pile body to limit the fanning angle of the fanning plate.

[0015] Furthermore, a movable connection structure is provided between the position where the fan plate overlaps the outer side of the protective plate and the protective plate to limit the fanning angle of the fan plate. The movable connection structure includes a long hole opened on the protective plate, a connecting rod passing through the long hole is provided on the fan plate, and a limit head is provided on one end of the connecting rod opposite to the fan plate.

[0016] Furthermore, the ballast water holding space includes a holding cavity arranged between the side surface of the pedestal and the lower surface of the outer edge of the table top, the holding cavity is used to load ballast water, and two groups of water inlet and outlet holes are arranged on the holding cavity opposite to the side surface of the pedestal, the two groups of water inlet and outlet holes are respectively located at both ends of the holding cavity and are connected to the holding cavity, and water retention cavities are arranged at both end positions inside the holding cavity.

[0017] Furthermore, the side surface of the accommodating cavity opposite to the support platform is an inwardly concave arc surface.

[0018] Furthermore, bow-shaped drag reducing bodies are provided on both end surfaces of the support platform adjacent to the accommodating cavity, and a smooth transition is provided between the bow-shaped drag reducing bodies and the outer side surfaces of the accommodating cavity on both sides of the support platform.

[0019] Furthermore, a supporting corbel is provided between the upper end of the side surface of the main load-bearing pile body and the lower surface of the pedestal, and the supporting corbel is provided in the shape of a bow.

[0020] In the above technical solution, the underwater pile foundation of the bridge provided by the present invention has the following beneficial effects:

[0021] The protective structure of this device is used to prevent the impact and accumulation of garbage on the water surface, avoid damage to the pile foundation caused by surface garbage and increase in resistance to the pile foundation caused by garbage accumulation, so as to ensure the stability of the pile foundation supported bridge. At the same time, when the water level rises and the water flow is large, the ballast water holding space is used to increase the weight of the water on this side from inflow to outflow through the ballast water holding space. When this side is impacted by the water flow, the weight is increased to maintain the overall stability of the pile foundation, thereby improving the stability of the bridge support. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 A schematic structural diagram of an underwater pile foundation for a bridge according to an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the water level of the underwater pile foundation of a bridge in an embodiment of the present invention in the ballast water holding space;

[0025] Figure 3 A schematic diagram of the water level of the underwater pile foundation of a bridge at the position of the protective structure provided by an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of water flow at two groups of pile foundation positions of an underwater bridge pile foundation provided by an embodiment of the present invention;

[0027] Figure 5 A schematic structural diagram of a protective structure for an underwater pile foundation of a bridge provided by an embodiment of the present invention;

[0028] Figure 6 A schematic structural diagram of the ballast water holding space of an underwater pile foundation of a bridge provided by an embodiment of the present invention;

[0029] Figure 7 A front view of a bow-shaped drag reducing body for an underwater pile foundation of a bridge provided by an embodiment of the present invention;

[0030] Figure 8 A top cross-sectional view of a cap of an underwater pile foundation for a bridge provided in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Pile foundation; 2. Capping platform; 3. Protective plate; 4. Fan plate; 5. Accommodating cavity; 6. Water inlet and outlet holes; 7. Water retention cavity; 8. Bow-shaped drag reduction body; 9. Supporting corbel; 101. Main load-bearing pile body; 102. Arc surface pile body; 103. First vertical rib; 104. Second vertical rib; 105. Limit block; 201. Outer edge of the table top; 301. Long strip hole; 401. Connecting rod. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1-8 , underwater pile foundation of bridge, including:

[0035] Pile foundation 1 and cap 2. The pile foundation 1 is divided into two symmetrical groups. Cap 2 is set on the top of the two groups of pile foundation 1 to connect the two groups of pile foundation 1 through the cap 2 to ensure the stability of the bridge support.

[0036] The upper end of the pile foundation 1 is provided with a protective structure to prevent the collision and accumulation of surface garbage. The protective structure is provided at the upper end of the pile foundation 1 based on the water level of the river or lake. Generally, the water level is ensured to be above the protective structure so that the pile foundation 1 can be protected by the protective structure. The protective structure includes a protective plate 3 and a fan plate 4 which is enclosed with the protective plate 3 to protect the pile foundation 1. When the fan plate 4 is fanned, it brings up water flow to carry away the garbage accumulated around the protective structure through the water flow. First, the protective structure protects the area around the pile foundation 1 under the encirclement of the protective plate 3 and the fan plate 4 to prevent the pile foundation 1 from being hit by the floating garbage on the water surface. At the same time, under the action of the water flow and various factors such as the pile foundation under which the floating garbage on the water surface is located, the fan plate 4 swings, which is equivalent to the fanning effect of the fan plate 4, so as to accelerate the flow of the surrounding water through the fan plate 4, and then carry away the garbage accumulated around the pile foundation 1 through the high-speed water flow, thereby preventing the garbage from accumulating around the pile foundation 1.

[0037] A table top edge 201 is provided on the top surface of the pedestal 2, and both sides of the table top edge 201 protrude from both sides of the pedestal 2 to form an outer edge structure. Ballast water holding space is provided between both sides of the pedestal 2 and the table top edge 201. The ballast water holding space is used to increase the weight of the water on this side during the process from inflow to outflow. This structure is especially effective when the water level of a river or lake rises and the water flow accelerates, and the water level reaches the position of the pedestal 2 and has a certain impact on the pedestal 2. Because the bearing capacity of the side of the pedestal 2 after being subjected to force is less than the bearing capacity of the two sides in the arrangement direction of the two groups of pile foundations 1, when the ballast water holding space position on the corresponding side is impacted by the water flow, in order to avoid shaking and maintain stability, the water flow enters the ballast water holding space to increase the weight of this side, thereby improving the stability of the pile foundation 1 under the impact of the water flow.

[0038] Furthermore, the pile foundation 1 includes a main load-bearing pile body 101 and an arc surface pile body 102. The arc surface pile body 102 is vertically arranged on one side surface of the main load-bearing pile body 101. In the two symmetrical groups of pile foundations 1, the two groups of arc surface pile bodies 102 are distributed on the opposite side surfaces of the two groups of main load-bearing pile bodies 101 to form a pile foundation 101. Figure 4 In the structural form shown, two groups of pile foundations 1 utilize the structure and shape of the arc surface pile body 102 to form a hull-like structure. Using the principle of fluid mechanics, the arc surface pile body 102 plays the role of separating the water flow, so that the water flows to both sides of the pile foundation 1, and the water flow is slow at the gap position between the two groups of main load-bearing pile bodies 101 to avoid water flow impact. The principle of the ship in the water is utilized here. The bow separates the water flow, and the water flow to the stern position will become slow, thereby slowing down the water flow at the gap position between the two groups of main load-bearing pile bodies 101 to avoid water flow impact and improve the stability of the pile foundation 1 under water.

[0039] Furthermore, the protective plate 3 surrounds the side surface of the main load-bearing pile body 101 except the side where the arc surface pile body 102 is located, and the inner side of the protective plate 3 and the side surface of the main load-bearing pile body 101 are connected and supported by setting a first vertical rib 103, so that a buffer distance is left between the protective plate 3 and the main load-bearing pile body 101 to avoid impact on the main load-bearing pile body 101 under the impact of garbage. At the same time, the first vertical rib 103 acts as a reinforcing rib to improve the structural strength of the main load-bearing pile body 101.

[0040] Furthermore, a second vertical rib 104 is provided on the arc surface of the arc pile body 102 opposite to the main load-bearing pile body 101, and fan plates 4 are provided on both sides of the second vertical rib 104. One end of the fan plate 4 is hinged on the side surface of the second vertical rib 104, and the other end can be swung and can be swung to overlap the outside of the protective plate 3. The two groups of fan plates 4 and the protective plate 3 form an enclosure to protect around the pile foundation 1.

[0041] Furthermore, a limit block 105 is provided on the end of the second vertical rib 104 opposite to the arc surface pile body 102 to limit the fanning angle of the fanning plate 4 .

[0042] Furthermore, a movable connection structure is provided between the position where the fan plate 4 overlaps the outer side of the protective plate 3 and the protective plate 3 to limit the fanning angle of the fan plate 4. The movable connection structure includes a long hole 301 opened on the protective plate 3, and a connecting rod 401 passing through the long hole 301 is provided on the fan plate 4. A limit head 402 is provided on the end of the connecting rod 401 opposite to the fan plate 4.

[0043] First, the two groups of fanning plates 4 supported by the second vertical ribs 104 form an enclosure with the protective plates 3 to protect around the pile foundation 1, and the limit blocks 105 and the movable connection structure limit the fanning angles of the fanning plates 4, so that the fanning plates 4 fan the water flow within a specified range to wash away the garbage, and when the fanning plates 4 are opened, that is, when they are separated from the protective plates 3, the limit blocks 105 and the movable connection structure limit the fanning angles of the fanning plates 4 to ensure that the position of the fanning plates 4 is stable and can withstand the water flow. The water flows through the gap between the fanning plates 4 and the protective plates 3 on one side, and is retained from the gap between the fanning plates 4 and the protective plates 3 on the other side to avoid resistance, and in this process, it can also promote the fanning of the fanning plates 4.

[0044] Furthermore, the ballast water holding space includes a holding cavity 5 arranged between the side surface of the pedestal 2 and the lower surface of the outer edge 201 of the table top. The holding cavity 5 is used to load ballast water. Two groups of water inlet and outlet holes 6 are arranged on the holding cavity 5 on the side surface opposite to the pedestal 2. The two groups of water inlet and outlet holes 6 are respectively located at the two ends of the cavity of the holding cavity 5 and are connected to the holding cavity 5. Water retention chambers 7 are arranged at the two end positions on the inner side of the holding cavity 5. During the operation of the ballast water holding space, water flows into the holding cavity 5 through one of the water inlet and outlet holes 6, and flushes into the water retention chamber 7, forming an obstruction or vortex, so as to achieve the effect of temporarily retaining the water flow in the holding cavity 5, and finally flows out of the holding cavity 5 from the other water inlet and outlet hole 6. In this process, the weight of this side is increased.

[0045] Furthermore, the side surface of the accommodating cavity 5 opposite to the support platform 2 is an inwardly concave arc surface, so that water can flow into the water inlet and outlet holes 6 more easily.

[0046] Furthermore, bow-shaped drag reducing bodies 8 are provided on both end faces of the pedestal 2 adjacent to the accommodating cavity 5. There is a smooth transition between the bow-shaped drag reducing bodies 8 and the outer side faces of the accommodating cavity 5 on both sides of the pedestal 2, so that the shape of a hull is formed around the entire pedestal 2. During the passage of water, the resistance is reduced, thereby avoiding the impact of water on the pedestal 2.

[0047] Furthermore, a supporting corbel 9 is provided between the upper end of the side surface of the main load-bearing pile body 101 and the lower surface of the pedestal 2. The supporting corbel 9 is provided in the shape of a bow, so that the supporting corbel 9 plays the role of reinforcing the pedestal 2. At the same time, the bow shape of the supporting corbel 9 reduces the resistance in the process of water flow passing through, thereby reducing the resistance of the connection position between the top of the main load-bearing pile body 101 and the pedestal 2 to the water flow, improving the stability of the pile foundation 1, and thereby improving the stability of the pile foundation 1 in supporting the bridge.

[0048] Among them, regarding the principle of the bow, the shape of the bow is related to the ship's navigation performance, appearance, construction technology, etc. Generally, the lower part of the bow of a ship is prone to generating bow waves, which is conducive to water flowing to the sides or downwards.

[0049] To sum up, the protective structure of this device is used to prevent the impact and accumulation of garbage on the water surface, avoid the damage of the pile foundation by the garbage on the water surface and the increase of the resistance to the pile foundation caused by the accumulation of garbage, so as to ensure the stability of the pile foundation-supported bridge. At the same time, when the water level rises and the water flow is large, the ballast water holding space is used to increase the weight of the water on this side during the process of inflow and outflow. When this side is impacted by the water flow, the weight is increased to maintain the overall stability of the pile foundation, so as to improve the stability of the bridge support.

[0050] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. The underwater pile foundation of the bridge is characterized by: include: Pile foundations (1) and caps (2), wherein the pile foundations (1) are two symmetrical groups, and the caps (2) are arranged on top of the two groups of pile foundations (1); A protective structure is provided at the upper end of the pile foundation (1) to prevent the collision and accumulation of garbage on the water surface. The protective structure comprises a protective plate (3) and a fanning plate (4) that surrounds the protective plate (3) to protect the periphery of the pile foundation (1). When the fanning plate (4) is fanned, water flow is generated to carry away garbage accumulated around the protective structure through the water flow. The top surface of the support platform (2) is provided with a table top outer edge (201), and both sides of the table top outer edge (201) protrude from both sides of the support platform (2) to form an outer edge structure. Ballast water storage spaces are provided between both sides of the support platform (2) and the table top outer edge (201), and the ballast water storage spaces are used to increase the weight of the water on this side during the process of water flowing in and out. The pile foundation (1) comprises a main load-bearing pile body (101) and a circular arc pile body (102), wherein the circular arc pile body (102) is vertically arranged on a side surface of the main load-bearing pile body (101) along the main load-bearing pile body (101); in two symmetrical groups of pile foundations (1), the two groups of circular arc pile bodies (102) are distributed on opposite side surfaces of the two groups of main load-bearing pile bodies (101); The protective plate (3) surrounds the side surface of the main load-bearing pile body (101) except the side where the arc surface pile body (102) is located, and the inner side of the protective plate (3) and the side surface of the main load-bearing pile body (101) are connected and supported by a first vertical rib (103); A second vertical rib (104) is provided on the arc surface of the arc surface pile body (102) opposite to the arc surface of the main load-bearing pile body (101), and the fan plates (4) are provided on both sides of the second vertical rib (104). One end of the fan plate (4) is hinged on the side surface of the second vertical rib (104), and the other end can swing and can swing to overlap the outside of the protective plate (3). The two groups of the fan plates (4) and the protective plate (3) form a closure to protect the surrounding of the pile foundation (1); The water flows through the gap between the fan plate (4) and the protective plate (3) on one side, and flows out from the gap between the fan plate (4) and the protective plate (3) on the other side to promote the fanning of the fan plate (4); The ballast water storage space includes a storage cavity (5) arranged between the side surface of the support platform (2) and the lower surface of the outer edge of the platform (201), and the storage cavity (5) is used to load ballast water. Two groups of water inlet and outlet holes (6) are arranged on the storage cavity (5) opposite to the side surface of the support platform (2). The two groups of water inlet and outlet holes (6) are respectively located at the two ends of the storage cavity (5) and are connected to the storage cavity (5). Water retention cavities (7) are provided at the two end positions inside the storage cavity (5).

2. The underwater pile foundation of a bridge according to claim 1, characterized in that: A limit block (105) is provided on one end of the second vertical rib (104) opposite to the arc surface pile body (102) to limit the fanning angle of the fanning plate (4).

3. The underwater pile foundation of a bridge according to claim 1, characterized in that: A movable connection structure is provided between the position where the fan plate (4) overlaps the outer side of the protective plate (3) and the protective plate (3) to limit the fanning angle of the fan plate (4), the movable connection structure comprising a long hole (301) provided on the protective plate (3), a connecting rod (401) passing through the long hole (301) provided on the fan plate (4), and a limit head (402) provided on one end of the connecting rod (401) opposite to the fan plate (4).

4. The underwater pile foundation of a bridge according to claim 1, characterized in that: The side surface of the accommodating cavity (5) opposite to the support platform (2) is an inwardly concave arc surface.

5. The underwater pile foundation of a bridge according to claim 1, characterized in that: Bow-shaped drag reducing bodies (8) are provided on both end surfaces of the support platform (2) adjacent to the accommodating cavity (5), and a smooth transition is formed between the bow-shaped drag reducing bodies (8) and the outer side surfaces of the accommodating cavity (5) on both sides of the support platform (2).

6. The underwater pile foundation of a bridge according to claim 1, characterized in that: A supporting bracket (9) is provided between the upper end of the side surface of the main load-bearing pile body (101) and the lower surface of the base (2), and the supporting bracket (9) is provided in the shape of a bow.

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