Bridge underwater pile foundation

Abstract

The invention discloses a bridge underwater pile foundation, and relates to the technical field of pile foundations. Comprising pile foundations and a bearing platform, the pile foundations are two symmetrical sets, and the bearing platform is arranged at the tops of the two sets of pile foundations; a protection structure is arranged at the upper end of the pile foundation and used for preventing collision and accumulation of garbage on the water surface, the protection structure comprises a protection plate and a flapping plate, the flapping plate and the protection plate surround to protect the periphery of the pile foundation, and when the flapping plate flaps, water flow is brought up so that the garbage accumulated on the periphery of the protection structure can be taken away through the water flow. The top surface of the bearing platform is provided with a platform surface outer edge, the two sides of the platform surface outer edge protrude out of the two sides of the bearing platform to form an outer edge structure, ballast water containing spaces are arranged between the two sides of the bearing platform and the platform surface outer edge, and the ballast water containing spaces are used for increasing the weight of the side in the process from inflow to outflow of water.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundations, and in particular to an underwater pile foundation for a bridge. Background Art

[0002] Underwater pile foundation refers to the pile foundation constructed in water, which is mainly used for the foundation construction of buildings such as highway bridges and culverts in rivers, lakes, ponds and other water bodies. Underwater pile foundation sinks the pile body into the water by drilling or punching holes, and then pours concrete to ensure the stability and bearing capacity of the bridge foundation. The number and arrangement of piles in the pile foundation should be determined according to the superstructure and load conditions. The pile foundation under the column can be a single pile or a group of piles arranged in a polygon. In the prior art, 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 for a long time, as well as the impact and accumulation of floating garbage on the water surface. The impact will cause damage to the pile foundation and affect the stability of the structure, while the accumulation of garbage will increase the resistance to the water flow around the pile foundation and increase the stress on the pile foundation. This has great potential risks and is also a great test for the stability of the bridge structure.

[0003] Therefore, based on the above technical problems, technicians in this field urgently need to develop underwater pile foundations for bridges. Summary of the invention

[0004] The purpose of the present invention is to provide an underwater pile foundation for a bridge in order to solve the above problems.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: The underwater pile foundation of the bridge of the present invention comprises: Pile foundations and caps, the pile foundations are two symmetrical groups, and the caps are arranged on the tops of the two groups of pile foundations; A protective structure is arranged 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 fanning plate which is enclosed with the protective plate to protect the area around the pile foundation. When the fanning plate is fanned, water flow is brought up to carry away the garbage accumulated around the protective structure through the water flow. 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 from inflow to outflow.

[0006] Furthermore, the pile foundation includes a main load-bearing pile body and an arc surface pile body, 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, and 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.

[0007] 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.

[0008] Furthermore, a second vertical rib is arranged 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 arranged 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.

[0009] 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.

[0010] Furthermore, a movable connection structure is arranged between the position where the fanning plate overlaps the outer side of the protective plate and the protective plate to limit the fanning angle of the fanning plate, and the movable connection structure includes an elongated hole opened on the protective plate, a connecting rod passing through the elongated hole is arranged on the fanning plate, and a limit head is arranged on one end of the connecting rod opposite to the fanning plate.

[0011] 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 on the inner side of the holding cavity.

[0012] Furthermore, the side surface of the accommodating cavity opposite to the support platform is an inwardly concave arc surface.

[0013] 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.

[0014] Furthermore, a supporting corbel is arranged 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 arranged in the shape of a bow.

[0015] In the above technical solution, the underwater pile foundation of the bridge provided by the present invention has the following beneficial effects: 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. 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 enhance the stability of the bridge support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the structure of an underwater pile foundation of a bridge provided by an embodiment of the present invention; Figure 2 A schematic diagram of the water level of the underwater pile foundation of a bridge provided by an embodiment of the present invention in the ballast water holding space; 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; Figure 4 A schematic diagram of water flow at two groups of pile foundation positions of an underwater pile foundation of a bridge provided by an embodiment of the present invention; 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; Figure 6 A schematic diagram of the structure of the ballast water holding space of the underwater pile foundation of the bridge provided by an embodiment of the present invention; Figure 7 A front view of a bow-shaped drag reducing body of an underwater pile foundation of a bridge provided by an embodiment of the present invention; 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.

[0018] Description of reference numerals: 1. Pile foundation; 2. Capping platform; 3. Protective plate; 4. Fanning 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. Limiting block; 201. Outer edge of table top; 301. Long strip hole; 401. Connecting rod. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-8 , underwater pile foundation of bridge, including: Pile foundation 1 and cap 2, the pile foundation 1 is divided into two symmetrical groups, and cap 2 is set on the top of the two groups of pile foundation 1, so as to connect the two groups of pile foundation 1 through the cap 2 to ensure the stability of the bridge support; A protective structure is arranged at the upper end of the pile foundation 1 to prevent the impact and accumulation of garbage on the water surface, wherein the protective structure is arranged at the upper end of the pile foundation 1 based on the water level of the river or lake water area. Generally, the water level is ensured to be above the protective structure so that the pile foundation 1 is protected by the protective structure. The protective structure includes a protective plate 3 and a fanning plate 4 which is enclosed with the protective plate 3 to protect the periphery of the pile foundation 1. When the fanning plate 4 is fanned, water flow is brought up to carry away the garbage accumulated around the protective structure through the water flow. Firstly, the protective structure protects the periphery of the pile foundation 1 under the encirclement of the protective plate 3 and the fanning plate 4 to prevent the impact of the floating garbage on the water surface on the pile foundation 1. At the same time, under the action of the water flow and various factors such as the pile foundation of the floating garbage on the water surface, the fanning plate 4 is caused to swing, which is equivalent to the fanning effect of the fanning plate 4, so as to promote the surrounding water flow to accelerate the flow through the fanning plate 4, and then the garbage accumulated around the pile foundation 1 is carried away by the high-velocity water flow, thereby preventing the garbage from accumulating around the pile foundation 1. A table top edge 201 is arranged 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 spaces are arranged between both sides of the pedestal 2 and the table top edge 201. The ballast water holding spaces are used to increase the weight of the water on this side during the process from inflow to outflow. This structure is especially useful 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 both 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 on this side, thereby improving the stability of the pile foundation 1 under the impact of the water flow.

[0021] 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 a side surface of the main load-bearing pile body 101. In the two symmetrical 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 Figure 4In 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 the two sides of the pile foundation 1, and the water flows slowly in the gap 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 will become slow, thereby slowing down the water flow in the gap 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.

[0022] 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 plays the role of a reinforcing rib to improve the structural strength of the main load-bearing pile body 101.

[0023] Furthermore, a second vertical rib 104 is arranged on the arc surface of the arc pile body 102 opposite to the main load-bearing pile body 101, and fan plates 4 are arranged 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 outer side 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.

[0024] Furthermore, 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 .

[0025] Furthermore, a movable connection structure is arranged between the position where the fanning plate 4 overlaps the outer side of the protective plate 3 and the protective plate 3 to limit the fanning angle of the fanning plate 4. The movable connection structure includes a long hole 301 opened on the protective plate 3, and a connecting rod 401 is arranged on the fanning plate 4 and passes through the long hole 301. A limit head 402 is arranged on the end of the connecting rod 401 opposite to the fanning plate 4.

[0026] 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 the pile foundation 1, and the limit blocks 105 and the movable connection structure limit the fanning angle of the fanning plates 4, so that the fanning plates 4 fan the water flow within the 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 angle 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 left out from the gap between the fanning plates 4 and the protective plates 3 on the other side to avoid resistance. In this process, the fanning of the fanning plates 4 can also be promoted.

[0027] 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, and two groups of water inlet and outlet holes 6 are arranged on the holding cavity 5 opposite to the side surface of 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 with the holding cavity 5, and water retention chambers 7 are arranged at the two end positions on the inner side of the holding cavity 5. During the action of the ballast water holding space, water flows into the holding cavity 5 through one of the water inlet and outlet holes 6, and is flushed into the water retention chamber 7 to form 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.

[0028] 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.

[0029] Furthermore, bow-shaped drag reducing bodies 8 are provided on both end surfaces of the platform 2 adjacent to the accommodating cavity 5. A smooth transition is provided between the bow-shaped drag reducing bodies 8 and the outer side surfaces of the accommodating cavity 5 on both sides of the platform 2, so that a hull shape is formed around the entire platform 2. During the passage of water, resistance is reduced, thereby avoiding the impact of water flow on the platform 2.

[0030] Furthermore, a supporting corbel 9 is arranged 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 arranged in the shape of a bow, so that the supporting corbel 9 plays a role in reinforcing the supporting 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 further improving the stability of the pile foundation 1 to the bridge support.

[0031] Among them, in the principle of the bow, the shape of the bow is related to the navigation performance, appearance, construction technology, etc. of the ship. Generally, the lower part of the bow of a ship is prone to generate bow waves, which is conducive to water flowing to the sides or the lower part.

[0032] To summarize, the protective structure of the device is used to prevent the impact and accumulation of surface garbage, 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 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 enhance the stability of the bridge support.

[0033] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. The underwater pile foundation of the bridge is characterized by: include: Pile foundations (1) and capping platforms (2), wherein the pile foundations (1) are two symmetrical groups, and the capping platforms (2) are arranged on top of the two groups of pile foundations (1); A protective structure is arranged at the upper end of the pile foundation (1) to prevent the impact and accumulation of garbage on the water surface, the protective structure comprising a protective plate (3) and a fanning plate (4) which surrounds the protective plate (3) to protect the periphery of the pile foundation (1), the fanning plate (4) bringing up a water flow when fanning to remove the 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 the two sides of the table top outer edge (201) protrude from the two sides of the support platform (2) to form an outer edge structure. Ballast water storage spaces are provided between the two 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.

2. The underwater pile foundation of a bridge according to claim 1, characterized in that: The pile foundation (1) comprises a main load-bearing pile body (101) and an arc surface pile body (102); the arc surface 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 arc surface pile bodies (102) are distributed on opposite side surfaces of the two groups of main load-bearing pile bodies (101).

3. The underwater pile foundation of a bridge according to claim 2, characterized in that: 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).

4. The underwater pile foundation of a bridge according to claim 3, characterized in that: A second vertical rib (104) is arranged on the arc surface of the arc surface pile body (102) opposite to the main load-bearing pile body (101), and the fan plates (4) are arranged 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 outer side 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).

5. The underwater pile foundation of a bridge according to claim 4, 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).

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

7. The underwater pile foundation of a bridge according to claim 1, characterized in that: The ballast water storage space comprises a storage cavity (5) arranged between the side surface of the support platform (2) and the lower surface of the outer edge (201) of the platform, the storage cavity (5) is used to load ballast water, and 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), and water retention cavities (7) are arranged at the two end positions inside the storage cavity (5).

8. The underwater pile foundation of a bridge according to claim 7, characterized in that: The side surface of the accommodating cavity (5) opposite to the support platform (2) is an inwardly concave arc surface.

9. The underwater pile foundation of a bridge according to claim 7, 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 body (8) and the outer side surfaces of the accommodating cavity (5) on both sides of the support platform (2).

10. The underwater pile foundation of a bridge according to claim 1, characterized in that: A supporting corbel (9) is arranged 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 corbel (9) is arranged in the shape of a bow.

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