Water-permeable flow guide device for preventing scouring of bridge pier foundation

Abstract

The utility model discloses an anti-scouring permeable flow guide device for a bridge pier foundation, which belongs to the field of bridge protection engineering and is characterized in that a plurality of fixed piles are arranged in a V-shaped structure, and the opening direction of the V-shaped structure faces a bridge pier body; the water permeable guide plates are arranged on the two side faces of the V-shaped structure respectively, the water permeable holes for water to flow through are formed in the water permeable guide plates, and due to the arrangement of the water permeable holes, the device has the good water permeable capacity, incoming flow is blocked, meanwhile, part of water flow is allowed to pass through the water permeable holes to penetrate through the water permeable guide plates, and the water permeable guide plates are more stable. Compared with a traditional anti-scouring baffle, the load effect of water flow on the guide plate is greatly reduced, the water flow speed is reduced, the water flow flowing path is more zigzag, the turbulent flow effect is higher, the pier front water flow velocity can be effectively reduced, and local scouring of the water flow on a pier foundation can be effectively reduced; the device is simple in structure and convenient to implement, operate and maintain, and has good popularization and application value.

Description

Technical Field

[0001] The utility model belongs to the field of bridge protection engineering, and particularly relates to a permeable flow guiding device for preventing scour of bridge pier foundations. Background Technique

[0002] In recent years, bridge disasters caused by foundation scour have occurred frequently. Scour has become an important reason threatening the safety of water-crossing bridges. Therefore, how to safely protect the local scour of bridge piers has always been a key research point. In the dynamic action of water flow, bridge scour is affected by many factors such as the form of foundation structure, water flow characteristics, and sediment movement in the riverbed. Bridge scour protection measures are divided into active protection and passive protection according to the mechanism. Among them, active protection is to change the water flow structure around the pier, reduce the water flow velocity and the intensity of the turbulent flow field around the pier, aiming to change the hydraulic characteristics of the incoming flow, such as expanding the pile foundation, opening slits in the bridge pier, ring-wing type retaining rings, and sacrificial piles arranged upstream of the bridge pier; passive protection refers to laying some solid materials to enhance the anti-scour ability of the sand bed around the pier to resist the impact of the incoming flow on the sand bed around the pier, aiming to enhance the anti-scour ability of the riverbed around the bridge pier, so as to avoid the scour caused by the downward flow and turbulent flow scouring the sand bed around the pier, such as laying granular protection materials around the bridge pier foundation to form a protective layer and riprap protection, etc.

[0003] Although the traditional protection device for local scour of bridge piers can play a role in preventing scour of bridge piers to some extent, it has great limitations, specifically manifested as follows: Generally, the scour protection device adopts a baffle structure and is set in front of the bridge pier. Although the baffle structure can weaken the local scour of the water flow on the bridge pier, after the water flow bypasses the baffle structure, it is very difficult to slow down the water flow velocity, and it will change the water flow direction and velocity, thus forming a new scour hot spot and causing a new impact on other parts of the bridge pier, resulting in damage to the bridge pier structure.

[0004] It can be seen that the existing scour protection device using a baffle structure, due to its inability to slow down the water flow velocity and its ability to change the water flow direction and velocity, forms a new scour hot spot and causes a new impact on other parts of the bridge pier. Summary of the Utility Model

[0005] In order to overcome the above technical defects, the utility model provides a permeable flow guiding device for preventing scour of bridge pier foundations, which can solve the technical problem that the existing scour protection device using a baffle structure, due to its inability to slow down the water flow velocity and its ability to change the water flow direction and velocity, forms a new scour hot spot and causes a new impact on other parts of the bridge pier.

[0006] In order to achieve the above purpose, the utility model adopts the following technical content:

[0007] A permeable flow guiding device for preventing scour of bridge pier foundations includes a plurality of fixed piles;

[0008] Multiple of the fixed piles are arranged in a V-shaped structure, and the opening direction of the V-shaped structure is set towards the pier body;

[0009] On two side surfaces of the side of the V-shaped structure close to the pier body, water-permeable diversion plates are respectively arranged, and the water-permeable diversion plates are fixedly connected to the fixed piles;

[0010] The water-permeable diversion plates are provided with a plurality of water-permeable holes.

[0011] Further, the two water-permeable diversion plates are hinged at the vertex of the V-shaped structure.

[0012] Further, an angle adjustment mechanism is arranged on the fixed pile at the vertex of the V-shaped structure; the two water-permeable diversion plates are movably connected through the angle adjustment mechanism; the angle adjustment mechanism includes a hinge connection assembly; the hinge connection assemblies are respectively arranged at the top and bottom of the fixed pile at the vertex of the V-shaped structure.

[0013] Further, the fixed piles are inserted into the pile holes in the riverbed, and the insertion depth is 2 times the river depth.

[0014] Further, M30 cement mortar with a grouting pressure not less than 0.5 Mpa is poured into the pile holes.

[0015] Further, the water-permeable diversion plates are inserted into the riverbed and are arranged closely with the fixed piles.

[0016] Further, the water-permeable diversion plates are made of stainless steel.

[0017] Further, the fixed piles are steel pipe piles.

[0018] Further, the water-permeable holes are circular, oval, square, rectangular or triangular.

[0019] Further, the plurality of water-permeable holes on the water-permeable diversion plates are arranged in an array.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The utility model provides a permeable flow guiding device for preventing scouring of pier foundations. In this device, multiple fixed piles are arranged in a V-shaped structure, and the opening direction of the V-shaped structure faces the pier body; permeable flow guiding plates are respectively arranged on the two sides of the V-shaped structure, and a number of permeable holes for water to flow through are opened on the permeable flow guiding plates. The setting of the permeable holes enables the device to have good water permeability. While blocking the oncoming flow, it also allows a part of the water flow to pass through the permeable holes and then pass through the permeable flow guiding plates, so that the load effect of the water flow on the flow guiding plates is greatly reduced compared with traditional anti-scouring baffles, reducing the water flow velocity, making the water flow path more tortuous, and having a stronger flow disturbance effect, which can effectively reduce the water flow velocity in front of the pier and the local scouring of the falling water flow on the pier foundation; the structure of this device is simple, facilitating implementation, operation and maintenance, and having good popularization and application value.

[0022] Preferably, in the utility model, the two permeable flow guiding plates are hinged at the vertex of the V-shaped structure, increasing the flexibility of the device, and the angle of the flow guiding plates can be appropriately adjusted according to the water flow direction or scouring situation, improving the anti-scouring effect.

[0023] Further preferably, in the utility model, through the design of an angle adjustment mechanism, such as a hinge connection assembly, the convenience and accuracy of the angle adjustment of the flow guiding plates are further enhanced, enabling the device to better adapt to different water flow conditions and scouring intensities, and improving the overall stability and durability.

[0024] Preferably, in the utility model, the insertion depth of the fixed piles is 2 times the river depth, ensuring the stability of the fixed piles, preventing loosening or displacement caused by water flow scouring or riverbed changes, and thus protecting the safety of the pier foundation.

[0025] Preferably, in the utility model, M30 cement mortar is poured into the pile holes and the grouting pressure is not less than 0.5 Mpa, enhancing the bonding strength between the fixed piles and the riverbed, and improving the overall stability and anti-scouring ability of the device.

[0026] Preferably, in the utility model, the permeable flow guiding plates are inserted into the riverbed and closely arranged with the fixed piles, further reducing the direct scouring of the water flow on the pier foundation, and at the same time ensuring the smoothness of the water flow when passing through the permeable holes, avoiding the occurrence of local scouring phenomena.

[0027] Preferably, in the utility model, the permeable flow guiding plates made of stainless steel material have excellent corrosion resistance and durability, can be used for a long time in a harsh environment without being easily damaged, and reduce the maintenance cost.

[0028] Preferably, in the utility model, the fixed piles are steel pipe piles, which not only have high strength and strong bearing capacity, but also are convenient for construction and installation, improving the construction efficiency and project quality.

[0029] Preferably, in the present utility model, the fixed piles are steel pipe piles, which not only have high strength and strong bearing capacity, but also are convenient for construction and installation, improving the construction efficiency and project quality.

[0030] Preferably, in the present utility model, the water-permeable holes on the water-permeable diversion plate are arranged in an array, making the water flow distribution more uniform, reducing the risk of local scouring, and at the same time improving the overall anti-scouring effect. This design also helps to improve the strength and stability of the water-permeable diversion plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. is a schematic structural diagram of a water-permeable diversion device for preventing scouring of a pier foundation provided by an embodiment of the present utility model;

[0032] Figure 2 FIG. is a schematic diagram of water flow under the protection of the water-permeable diversion device for preventing scouring of a pier foundation provided by an embodiment of the present utility model;

[0033] Figure 3 FIG. is a schematic structural diagram of another water-permeable diversion device for preventing scouring of a pier foundation provided by an embodiment of the present utility model.

[0034] REFERENCE NUMERALS:

[0035] 1 - Pier body, 2 - Fixed pile, 3 - Water-permeable diversion plate, 31 - Water-permeable hole, 4 - Hinge connection assembly. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the following specific embodiments are used to further elaborate on the present utility model. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but is merely representative of selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0039] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is habitually placed during use, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0041] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0042] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0043] The following further describes the present utility model in detail with reference to the drawings:

[0044] Embodiment 1

[0045] Combined with what is mentioned in the background technology, although the traditional protection device for local scour of bridge piers can play a certain role in preventing scour of bridge piers, it has great limitations, specifically manifested as follows: Generally, the anti-scour device adopts a baffle structure and is set in front of the bridge pier. Although the baffle structure can weaken the local scour of the water flow on the bridge pier, after the water flow bypasses the baffle structure, it is very difficult to slow down the water flow speed, and it will change the water flow direction and speed, thus forming a new scour hot spot and causing a new impact on other parts of the bridge pier, resulting in damage to the bridge pier structure.

[0046] To solve the above problems, this embodiment provides a permeable diversion device for preventing scour of pier foundations. Using this diversion device can effectively reduce the damage caused by water flow to the pier structure. It not only has a simple structure, a wide application range, convenient construction materials, and low cost, but also can well solve the problem of difficult later maintenance and can effectively weaken the local scour of the pier foundation.

[0047] As Figure 1 and Figure 2 shown, this embodiment provides a permeable diversion device for preventing scour of pier foundations.

[0048] A plurality of fixed piles 2, wherein the plurality of fixed piles 2 are arranged in a V-shaped structure, and the opening direction of the V-shaped structure is set towards the pier body 1;

[0049] Among them, the fixed pile 2 is inserted into the pile hole of the riverbed, and the insertion depth is 2 times the depth of the river.

[0050] In this embodiment, M30 cement mortar with a grouting pressure not less than 0.5 Mpa is poured into the pile hole.

[0051] In this embodiment, the distance between two adjacent fixed piles 2 is one-fourth to one-half of the diameter of the pier body 1.

[0052] In this embodiment, the distance from the fixed pile 2 at the vertex of the V-shaped structure to the center of the pier body 1 is 1.5 - 2 times the diameter of the pier body 1.

[0053] On the two side surfaces of the V-shaped structure close to the pier body 1, permeable diversion plates 3 are respectively arranged, and the permeable diversion plates 3 are fixedly connected to the fixed piles 2; the permeable diversion plates 3 are inserted into the riverbed and are arranged closely with the fixed piles 2.

[0054] In this embodiment, in order to better ensure the water permeability and anti-scour effect, a number of water permeable holes 31 are opened on the permeable diversion plate 3; the water permeable holes 31 can be circular, oval, square, rectangular or triangular, or can be of irregular shapes.

[0055] In order to ensure the service life and working performance of the permeable diversion plate 3, in this embodiment, the permeable diversion plate 3 is made of a diversion plate made of stainless steel.

[0056] In this embodiment, the fixed pile 2 is a steel pipe pile. Using a steel pipe pile for the fixed pile not only has high strength and strong bearing capacity, but also is convenient for construction and installation, improving the construction efficiency and project quality.

[0057] In this embodiment, in order to make the water flow distribution more uniform, a number of water permeable holes 31 on the permeable diversion plate 3 are arranged in an array; reducing the risk of local scour and at the same time improving the overall anti-scour effect, this design also helps to improve the strength and stability of the permeable diversion plate.

[0058] It can be seen that this embodiment provides a permeable diversion device for preventing scouring of pier foundations. By arranging permeable diversion plates on the fixed piles fixed in front of the pier body, a number of permeable holes are provided on the permeable diversion plates to make them permeable. While blocking the oncoming flow, a part of the water flow is also allowed to pass through the circular holes and penetrate the permeable diversion plates, so that the load effect of the water flow on the diversion plates is greatly reduced compared with the traditional anti-scouring baffle. The water flow path is more tortuous and the flow disturbance effect is stronger, which can effectively reduce the flow velocity of the water flow in front of the pier and the local scouring of the falling water flow on the pier foundation. At the same time, this diversion device will not damage the original structure of the pier body and has no impact on the original structure of the pier body. It is suitable for the protection of newly built piers and also for the supplementary protection of existing piers. It has the advantages of simple structure, wide application range, convenient construction material selection, and low cost.

[0059] Embodiment 2

[0060] As Figure 3 shown, this embodiment provides another permeable diversion device for preventing scouring of pier foundations. Its basic structure is the same as that of Embodiment 1, and it has been improved and optimized on the basis of Embodiment 1. After the improvement, the function of the angle adjustment of this diversion device is realized. The specific structure is as follows:

[0061] In this embodiment, at the vertex of the V-shaped structure of the two permeable diversion plates 3, that is, at the fixed pile 2 located at the vertex of the V-shaped structure, the two permeable diversion plates 3 are hinged together through an angle adjustment mechanism, realizing the angle adjustment between the two permeable diversion plates 3. Such a design can appropriately adjust the angle of the diversion plate according to the water flow direction or scouring situation, increasing the flexibility of the device and improving the anti-scouring effect of the pier.

[0062] Specifically, in this embodiment, the angle adjustment mechanism includes two hinge connection components 4. One is arranged at the top of the fixed pile 2 located at the vertex of the V-shaped structure, and the other is located at the bottom of the fixed pile 2 at the vertex. The hinges of the hinge connection components 4 are fixed to the two permeable diversion plates 3 through bolts, thereby realizing the angle adjustment between the two permeable diversion plates 3. When the water flow direction or scouring situation changes, the angle between the two permeable diversion plates 3 can be appropriately adjusted through the hinge connection components 4, so as to achieve the best anti-scouring effect.

[0063] In summary, the present utility model provides a permeable diversion device for preventing scouring of pier foundations. Compared with the existing anti-scouring measures, it has the following advantages:

[0064] With this diversion device, while blocking the oncoming flow, it also allows a part of the water flow to pass through the permeable diversion plate through the round holes, greatly reducing the load of the water flow on the diversion plate compared to the traditional anti-scouring baffle. The water flow path becomes more tortuous, with a stronger flow disturbance effect, effectively reducing the flow velocity of the water flow in front of the pier and the local scour of the falling water flow on the pier foundation. The water flow flowing out of the permeable diversion plate in different directions can effectively weaken the flow velocity around the pile and the intensity of various vortex systems, resulting in a larger shielding range. Using this permeable diversion device as a protection measure is more flexible than the traditional protection measure, and the protection effect is more remarkable.

[0065] The above embodiments are merely one of the implementation manners capable of realizing the technical solution of the present invention. The scope of protection required by the present invention is not only limited by this embodiment, but also includes any changes, substitutions and other implementation manners that are easily conceivable by those skilled in the art within the technical scope disclosed by the present invention.

Claims

1. A water-permeable diversion device for preventing scour of bridge pier foundation, characterized in that: comprising a plurality of fixing piles (2); The plurality of fixed piles (2) are arranged in a V-shaped structure, and the opening direction of the V-shaped structure is arranged toward the bridge pier body (1); Water-permeable guide plates (3) are respectively arranged on two side surfaces of the V-shaped structure on one side close to the pier body (1), and the water-permeable guide plates (3) are fixedly connected to the fixing piles (2); The water permeable guide plate (3) is provided with a plurality of water permeable holes (31).

2. A water permeable diversion device for preventing scour of a bridge pier foundation according to claim 1, characterized in that: The two water permeable guide plates (3) are connected by hinges at the vertices of the V-shaped structure.

3. A water-permeable diversion device for preventing scour of a bridge pier foundation according to claim 2, characterized in that: An angle adjustment mechanism is provided on the fixed pile (2) located at the apex of the V-shaped structure; the two water-permeable guide plates (3) are movably connected via the angle adjustment mechanism; the angle adjustment mechanism comprises a hinge connection component (4); the hinge connection component (4) is respectively provided at the top and bottom of the fixed pile (2) located at the apex of the V-shaped structure.

4. A water permeable diversion device for preventing scour of a bridge pier foundation according to claim 1, characterized in that: The fixed pile (2) is inserted into a pile hole in the riverbed, and the insertion depth is twice the depth of the river.

5. A water permeable diversion device for preventing scour of a bridge pier foundation according to claim 4, characterized in that: The pile hole is filled with M30 cement mortar with a grouting pressure of not less than 0.5Mpa.

6. A water-permeable diversion device for preventing scour of a bridge pier foundation according to claim 4, characterized in that: The permeable guide plate (3) is inserted into the riverbed and is arranged in close contact with the fixed pile (2).

7. The water permeable diversion device for preventing scour of bridge pier foundation according to claim 1, characterized in that: The water permeable guide plate (3) is made of stainless steel.

8. The water permeable diversion device for preventing scour of bridge pier foundation according to claim 1, characterized in that: The fixed piles (2) are steel pipe piles.

9. The water permeable diversion device for preventing scour of bridge pier foundation according to claim 1, characterized in that: The water permeable hole (31) is circular, oval, square, rectangular or triangular.

10. The water permeable diversion device for preventing scour of bridge pier foundation according to claim 1, characterized in that: The plurality of water permeable holes (31) on the water permeable guide plate (3) are arranged in an array.

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