Anti-scouring pier protection device

Abstract

The utility model discloses an anti-scouring bridge pier protection device, and belongs to the technical field of bridge pier protection. Comprising a bridge pier body, the bridge pier body is arranged on a riverbed, water-permeable energy dissipation columns are distributed at the upstream position of the bridge pier body, a mattress layer is laid at the riverbed between the water-permeable energy dissipation columns and the bridge pier body, apron boards are arranged on the two sides of the bottom end of the bridge pier body in the water flow direction, and each water-permeable energy dissipation column comprises a fixed base; frame ribs are annularly and vertically inserted into the upper portion of the fixed base, uniform circular ring pieces are jointly welded to the peripheries of the multiple frame ribs, and a top plate is fixedly arranged at the top ends of the frame ribs. Direct impulsive force of water flow to the bridge pier is reduced, the bridge pier structure is protected, and the stability of the bridge under flood and other conditions is enhanced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of bridge pier protection, in particular to a bridge pier protection device for preventing scouring. BACKGROUND

[0002] The water flow structure around a bridge pier includes downward flow in front of the pier, surge wave in front of the pier and vortex behind the pier. The upper flow speed is faster than the flow speed of the river bottom, forming a horseshoe-shaped vortex around the bridge pier. The center of each vortex that rotates rapidly and moves downstream will have a negative pressure, which will suck up the riverbed sediment and carry it downstream, and deposit it downstream of the bridge pier, thereby forming a long sand ridge. At present, the measures to reduce local scouring of the bridge pier mainly include active protection measures and passive protection measures. The active protection measures start from reducing the erosion of the downward flow and the horseshoe vortex, such as expanding the pile foundation, opening slots on the pier, ring-wing type protection ring and sacrificial piles arranged upstream of the pier; the passive protection measures mainly start from improving the erosion resistance of the riverbed, such as laying granular protective materials around the pier foundation to form a protective layer and rock throwing protection and the like.

[0003] In the related art, in order to solve the problem that the downward flow in front of the sacrificial pile erodes the riverbed around the pile, causing local scouring of the pile itself, and even causing the pile to tilt or collapse, the patent with the publication number CN216999884U provides a protection device for reducing local scouring of a bridge pier foundation. The device has a simple structure, is convenient to construct and obtain materials and has a low cost, and can effectively reduce local scouring of the bridge pier foundation. Specifically, the device includes a water-permeable flow-disturbing pile, which is arranged upstream of a bridge pier to be protected. The water-permeable flow-disturbing pile has a hollow structure, is filled with a filler and has a plurality of side seams uniformly formed on the side wall.

[0004] Although the existing technical solution in the above-mentioned patent can greatly reduce the load of water flow on the water-permeable flow-disturbing pile relative to the load of water flow on the traditional solid sacrificial pile by arranging the water-permeable flow-disturbing pile, filling the water-permeable flow-disturbing pile with the filler and effectively reducing the flow speed of the water flow in front of the pier and the local scouring effect of the downward flow on the bridge pier foundation, the existing water-permeable flow-disturbing pile has a limited protection range, cannot weaken the flow speed of the water behind the pile, is prone to form backflow scouring, cannot block small-grained sediment and pebbles and is prone to accumulate and then start scouring again. The single pile body independently bears the force and lacks overall linkage, so that local damage may cause a chain failure.

[0005] In view of this, the application provides a bridge pier protection device for preventing scouring. CONTENT OF THE UTILITY MODEL

[0006] The application aims to provide an anti-scour bridge pier protection device, which solves the technical problems of the existing water-permeable spoiler pile, such as limited protection range, inability to weaken the flow rate of water behind the pile, easy formation of backflow scour, difficulty in blocking small particle silt and pebbles, easy accumulation and then re-starting scour, single pile independent stress, lack of overall linkage, and possible chain failure after local damage, and achieves the technical effect of arranging multiple protective barriers around the bridge pier, covering the scour sensitive area, and gradually weakening the downflow energy.

[0007] The application provides an anti-scour bridge pier protection device, which comprises a bridge pier body arranged on a riverbed, and water-permeable energy dissipation columns arranged at the upstream of the bridge pier body.

[0008] Preferably, the water-permeable energy dissipation column comprises a fixed base, a frame rib is vertically inserted into the fixed base in a ring shape, a plurality of frame ribs are collectively welded with uniform circular ring members at the periphery, and a top plate is fixedly arranged at the top end of the frame rib.

[0009] Preferably, the frame rib and the ring member form a circular grid shape, and the grid gap is smaller than the size of the filler.

[0010] Preferably, the water-permeable energy dissipation column is distributed in a V shape along the water flow, the opening in the water flow direction is large, and the water cross-sectional width formed by the plurality of water-permeable energy dissipation columns is -times the diameter of the bridge pier body.

[0011] Preferably, the distance between the water-permeable energy dissipation columns closest to the bridge pier body is greater than the height of the water-permeable energy dissipation column.

[0012] Preferably, the included angle of the water-permeable energy dissipation column ranges from 30° to 60°.

[0013] Preferably, the mattress layer comprises a geotextile layer and a positioning pin, the positioning pin is symmetrically arranged at the bottom end of the geotextile layer on both sides, and is fixedly connected with the preformed hole of the riverbed, the geotextile layer is provided with a geogrid, the top end of the geogrid is uniformly provided with a concrete block, and the concrete block is in a trapezoidal shape.

[0014] One or more technical solutions provided in the application embodiment have at least the following technical effects or advantages:

[0015] (1) The skirt plate can disperse the main water flow, increase the pier bottom area to disperse the water flow impact force, disperse to both sides of the bridge pier, reduce the direct impact of the water flow on the bridge pier, protect the bridge pier structure, and enhance the stability of the bridge under flood and other conditions.

[0016] (2) The water-permeable energy dissipation column can intercept silt and small stones through the grid gaps, so that the silt and small stones can enter but cannot exit, are intercepted by the internal filler to form a new barrier to dissipate energy, and the V-shaped distribution form can adjust the water flow direction, so that the main flow is far away from the bridge pier.

[0017] (3) The mattress layer is provided, and the plurality of concrete blocks are in a convex shape, so that the riverbed resistance is increased, the flow velocity is reduced, the silt and pebbles moved under the water flow are intercepted, the overall direction and rigidity of the riverbed surface are increased, and the displacement or inclination of the bridge pier caused by factors such as water flow scouring and riverbed deformation is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a first three-dimensional structure schematic view of the utility model;

[0019] Figure 2 It is a second three-dimensional structure schematic view of the utility model;

[0020] Figure 3 It is a three-dimensional structure schematic view of the protection assembly of the utility model;

[0021] Figure 4 It is a three-dimensional structure schematic view of the lifting assembly of the utility model;

[0022] Figure 5 It is a front view structure schematic view of the utility model;

[0023] Figure 6 It is a structure schematic view of another embodiment of the apron of the utility model;

[0024] Mark number explanation in the drawing: 1, bridge pier main body; 2, apron; 3, mattress layer; 31, concrete block; 32, geogrid; 33, positioning pin; 34, geotextile layer; 4, water-permeable energy dissipation column; 41, fixed base; 42, frame rib; 43, ring; 44, top plate. DETAILED DESCRIPTION

[0025] The application will be further described in detail in combination with the drawings of the specification.

[0026] Example one

[0027] Please refer to Figures 1-6The utility model provides an embodiment: a kind of scouring prevention pier protection device, including pier main body 1, the pier body of pier main body 1 uses erosion-resistant concrete such as adding silica ash, fiber, and protective layer uses weather-resistant stone or composite geomembrane, pier main body 1 is arranged on riverbed, and water-permeable energy dissipation column 4 is distributed and arranged at upstream of pier main body 1, bedding course 3 is laid at riverbed between water-permeable energy dissipation column 4 and pier main body 1, skirt plate 2 is arranged on the two sides of the bottom end of pier main body 1 in compliance with water flow direction, and skirt plate 2 front disperses main stream water flow, can increase pier bottom area and disperses water flow impact force, skirt plate 2 can block silt transverse washing, such as Figure 6 Skirt plate 2 can also be designed into axe bow shape, and the shape of axe bow is similar to ship shape or sharp wedge shape, which can replace the structure under the permission of installation process, and axe bow is excellent fluid controller, and the scouring prevention effect is better, water body can be pushed upward, water flow passes smoothly, is dispersed to both sides of pier, reduces the direct impact of water flow on pier, protects pier structure, and enhances the stability of bridge under flood condition.

[0028] Further, water-permeable energy dissipation column 4 is distributed in V shape along water flow, and the opening is large in water flow direction, and the water cross-sectional width formed by multiple water-permeable energy dissipation columns 4 is 2-3 times of pier diameter of pier main body 1, and the spacing between the nearest water-permeable energy dissipation columns 4 to pier main body 1 is greater than the height of water-permeable energy dissipation column 4, as shown in the reference Figure 5 Reasonable spacing can make water-permeable energy dissipation column 4 collapse even if damage occurs with the increase of service life, without causing damage to pier main body 1, and an inclined protective barrier can be reformed in front of pier main body 1, and the included angle range of water-permeable energy dissipation column 4 is 30°-60°. Water-permeable energy dissipation column 4 includes fixed base 41, frame rib 42 is vertically inserted into the ring type above fixed base 41, multiple frame ribs 42 are collectively welded with uniform circular ring 43 outside, and top plate 44 is fixedly arranged at the top end of frame rib 42, frame rib 42 and ring 43 form circular grid, and the size of grid gap is less than that of filler, and the filler is stone, the installation process of water-permeable energy dissipation column 4 can refer to the prior art, water-permeable energy dissipation column 4 can intercept silt and small stones through grid gap, so that it can enter but not exit, and a new barrier is formed by internal filler to dissipate energy, and the water flow direction can be adjusted by cooperating with V-shaped distribution form, so that main stream is far away from pier.

[0029] Further, the bedding layer 3 comprises a geotextile layer 34 and positioning pins 33 symmetrically arranged at both sides of the bottom end of the geotextile layer 34 and fixedly connected with the preformed holes of the riverbed, the geotextile layer 34 is provided with geogrids 32, the top end of each geogrid 32 is uniformly provided with a concrete block 31, and the concrete block 31 is in the shape of a trapezoid. The plurality of concrete blocks 31 are in the shape of protrusions, which can increase the riverbed resistance, reduce the flow rate, intercept the moving silt and pebbles driven by the water flow, increase the overall rigidity of the riverbed surface, reduce the displacement or inclination of the pier caused by the water flow scouring and riverbed deformation, and the soft and hard combined structure of the bedding layer 3 can adapt to different geological conditions and deformation conditions, coordinate the differential deformation between the pier and the riverbed, and make the pier and the riverbed jointly bear the load.

[0030] The prior art uses a single water-permeable energy dissipation column 4, and the energy dissipation range is limited, and the application avoids the backflow of the water flow after being divided, has better interception effect on silt and pebbles, and significantly prolongs the service life of the pier main body 1.

[0031] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, the circuit connection adopts the conventional connection mode in the prior art, and the details are not described herein, and the contents not described in detail in the description belong to the prior art known to those skilled in the art.

[0032] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A bridge pier protection device for erosion prevention, characterized in that: The application relates to a bridge pier body (1) arranged on a riverbed, wherein water-permeable energy-dissipation columns (4) are arranged on the upstream side of the bridge pier body (1), a cushion layer (3) is arranged between the water-permeable energy-dissipation columns (4) and the bridge pier body (1), and skirt plates (2) are arranged on the bottom end of the bridge pier body (1) on both sides along the water flow direction.

2. A scour protection device for a bridge pier according to claim 1, characterised in that: The water-permeable energy-dissipation column (4) comprises a fixed base (41), a frame rib (42) is vertically inserted into the fixed base (41), a plurality of frame ribs (42) are uniformly welded with a circular ring (43) on the periphery, and a top plate (44) is fixedly arranged on the top end of the frame rib (42).

3. A scour protection for a bridge pier as claimed in claim 2, wherein: The frame rib (42) and the ring (43) form a circular grid, the grid gap is smaller than the size of the filler, and the filler is a stone.

4. The scour protection pier protection apparatus of claim 1, wherein: The water-permeable energy-dissipation column (4) is distributed in a V shape along the water flow, the opening in the water flow direction is large, the water cross-section width formed by the plurality of water-permeable energy-dissipation columns (4) is 2-3 times the pier diameter of the bridge pier body (1).

5. The scour protection for a bridge pier as claimed in claim 1, wherein: The distance between the water-permeable energy-dissipation columns (4) closest to the bridge pier body (1) is greater than the height of the water-permeable energy-dissipation column (4).

6. The scour protection pier protection apparatus of claim 1, wherein: The included angle of the water-permeable energy-dissipation column (4) ranges from 30 DEG to 60 DEG.

7. A scour protection for a bridge pier as claimed in claim 6, wherein: The cushion layer (3) comprises a geotextile layer (34) and positioning pins (33), the positioning pins (33) are symmetrically arranged on both sides of the bottom end of the geotextile layer (34) and are fixedly connected with the prefabricated holes of the riverbed, the geotextile layer (34) is provided with geogrids (32), the top end of the geogrid (32) is uniformly provided with concrete blocks (31), and the concrete block (31) is in a trapezoidal shape.

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