KR100570921B1 - Structure of protection erosion for pier foundation - Google Patents

Abstract

The present invention minimizes the generation of vortices for the scour bar formed in the foundation of the bridge, to create a vegetation block of aquatic plants to create an ecological environment of the aquatic life, and to the scour prevention structure of the base of the piers that do not interfere with the flow of water More specifically, the bottom portion is formed with a plurality of inlets in the front formed in the shape of a rectangular block, the inlet forms a waterway having a constant diameter, but a plurality of drain holes formed with a small diameter at the rear end is configured, the top of the square block Has a certain width and is inclined so as to receive less water resistance, and a plurality of fitting grooves having different sizes on the inner side thereof are formed in the longitudinal direction, and are integrally horizontally extended to the upper rear where the fitting grooves are formed, and anchor bolts are disposed around the inner center. The vertical inclination end is provided with an upper contact surface formed with an anchor hole to be fastened, and a discharge hole is formed at the rear of the horizontally extended part. It is formed integrally, the incision is formed so that the bottom of the vertical inclined end flows, integrally with the bottom of the incision to form a lower contact surface forward, integrally connected to the rear of the bottom of the square block, the center is formed Scour prevention bar consisting of two pairs, and the left and right sides of the bottom of the bottom projections are formed in the transverse direction, surrounded by four-sided partition wall is formed with a mesh base, gravel, cultivated soil is laid and aquatic plants vegetation vegetation block, anchor bolt The front of the anchor hole to be fastened in the transverse direction is extended to the rear of the inclined fixing plate to receive less water resistance, so that the bottom surface is horizontal and the top surface is inclined so that the rear side is higher, but the vertical plate is fastened to the inclined surface. The vertical plate groove is characterized by consisting of a flow rate reduction plate formed in the transverse direction.

Underwater Structure, Scour Protector, Vortex, Vegetation Block, Flow Reduction Plate

Description

Structure of protection erosion for pier foundation

1 is an explanatory diagram showing a scour phenomenon of a conventional underwater structure,

Figure 2 is an exploded perspective view of the scour prevention structure of the bridge foundation portion according to the present invention,

3 is a combined perspective view of the scour prevention structure of the bridge foundation portion according to the present invention,

4 is a cross-sectional view taken along the line A-A of FIG.

5 is an operation cross-sectional view showing the operation of the scour prevention structure of the piers foundation portion according to the present invention,

<Description of Symbols for Main Parts of Drawings>

10: scour prevention structure 11: scour prevention tool

12: vegetation block 13: flow rate reduction

100: underwater structure 101: pier

102: fixed end 103: bridge foundation

111: upper contact surface 111a: anchor hole

111b: anchor bolt 112: space

113: fitting groove 114: inlet

115: outlet 116: waterway

117: incision 118: lower contact surface

121: fitting protrusion 131: fixed plate

131a: Anchor hole 131b: Anchor bolt

132: vertical plate groove 133: vertical plate

a: gravel b: culture soil

c: aquatic plants

The present invention relates to the scour prevention structure of the foundation part of the bridge, in particular to minimize the generation of vortex for scour prevention bar formed in the foundation of the bridge, to form a vegetation block of aquatic plants to create an ecological environment of aquatic life, It relates to the scour prevention structure of the foundation part of the bridge which does not interfere.

The primary cause of local scour in bridge piers is the formation of vortices in the bed, vortices occurring around the piers and generated by the downflow, called horseshoe vortex. The vortex that occurs immediately downstream of the bridge is called a wake vortex.

Such scour phenomenon occurs when the removal amount is larger than the amount of sediment flowing into the foundation, and as time passes, scour holes and scour depths in front of the piers gradually increase, which not only breaks the piers, but also subsoil and piers. The frictional force between and falls, causing the collapse of the leg. The structure of the vortex system is divided into three basic systems: horseshoe vortex, wake vortek, and trailing vortek phenomena, all of which consist of one or two phenomena. do.

In general, the bottom of the place where underwater structures such as rivers or seas are installed has a high flow of water or vortex. If the flow rate is high, the speed of water flows faster, causing a large vortex at the periphery of the underwater structure. The vortex causes the sedimentary layer 200 to protect the periphery of the underwater structure 100, as shown in FIG. 1, and the soil and gravel introduced into the water form the underwater structure 100 and the bedrock 300. Wear and erosion of scour occurs.

The scour phenomenon as described above causes the bridge to collapse or fall due to subsidence or conduction of an underwater structure such as a bridge when flooding or flowing at a low velocity of water flow for a long time.

Conventionally, in order to prevent such scour phenomenon, the sandstone is laid on the bottom surface of the underwater structure to a certain thickness, but this has the problem of destroying nature because the rock is made by crushing and collecting rock of a certain size. My typhoon

When the occurrence of the dead stone will have a problem.

Therefore, conventionally, a plurality of tetraports, mat-shaped blocks, or gabions are installed around the underwater structure to prevent scour. However, the tetraports are somewhat suitable for beach breakwater, but have a slow flow rate. In the river

The mat-shaped block is uneconomical due to an increase in construction cost in a place where the scour phenomenon is not severe, and becomes a stand-alone type in the case of the gabion, which is lost during flooding or the shape of the mesh is deformed, thereby reducing its effect. There is.

In addition, the deeper the depth, the faster the flow rate of the riverbed, the more deep scour phenomena of the riverbed surrounding the submerged structure is embedded in the riverbed, the rapid flow rate of aquatic life in the river There was a problem of inadequate formatting environment.

Accordingly, the present invention has been made in view of the problems of the prior art as described above is located in the upper surface of the bottom of the underwater structure buried in the river bottom and fixed by attaching two scaffolds in close contact with the piers and piers foundation The purpose of the present invention is to provide scrubbing of adjacent parts of the underwater structure and the riverbed.

Another object of the present invention is to fix a flow rate reduction plate having a plurality of vertical plates formed on a river bottom in front of a scour prevention device, thereby reducing the flow rate of river water and thereby reducing resistance due to the flow rate.

In addition, another object of the present invention is to form a large diameter inlet in the front of the scour prevention port and to form a plurality of outlets with a small diameter in the rear so that the stream flows through the inlet at a high flow rate through the inlet to flow the water To prevent interference and to prevent scour, and to improve the anchoring force of the underwater structure and scour prevention device.

In addition, another object of the present invention is to form a space portion in the center except the upper and lower parts where the scour prevention device is fixed, so that water flows naturally, fixing a vegetation block planted aquatic plants between the front of the pair of scour prevention bar. This is to reduce the flow rate of river water and to provide habitat and rest for aquatic life.

In order to achieve the above object, the present invention has a plurality of inlets formed in the front of the bottom portion formed in the shape of a square block, and the inlets form a plurality of drains formed with a small diameter at the rear end while forming a channel having a constant diameter, The upper part of the square block is inclined so as to receive less resistance to water, and has a certain width, and a plurality of fitting grooves having different sizes are formed in the longitudinal direction in the longitudinal direction. It is provided with an upper contact surface formed with an anchor hole is fastened to the anchor bolt, the vertical inclined end is formed integrally with the discharge port formed in the rear horizontally extended, the inclined portion is formed so that the bottom of the vertical inclined end flows, It forms a bottom contact surface forwardly integrally with the bottom and is integrally connected to the rear of the bottom of the square block. And for anti-scour is added is formed constituting the two trillion,

A vegetation block formed on the left and right sides of the bottom in a transverse direction and surrounded by four-sided bulkheads and formed of a mesh with a base plate, where gravel, culture soil is laid, and aquatic plants are vegetated;

The anchor hole to which the anchor bolt is fastened is formed in the transverse direction, and the front side is extended to the rear of the inclined fixing plate to receive less water resistance, so that the bottom surface is horizontal and the top surface is inclined so that the rear side is higher. It provides a scour prevention structure of the foundation part of the piers characterized in that the plurality of vertical plate grooves are formed of a flow rate reducing plate formed in the transverse direction.

Therefore, it is to reduce the flow rate, to activate the aquatic ecosystem and to prevent scour of the riverbed in which the underwater structure is constructed.

The preferred embodiment of the present invention as described above will be described in detail based on the accompanying drawings.

2 is an exploded perspective view of the scour prevention structure of the bridge foundation according to the present invention, Figure 3 is a combined perspective view of the scour prevention structure of the bridge foundation according to the present invention, Figure 4 is a cross-sectional view AA line of FIG. 5 is an operation cross-sectional view showing the operation of the scour prevention structure of the piers foundation portion according to the present invention.

As shown in FIG. 2, the scour prevention structure of the foundation part of the piers according to the present invention has a plurality of inlets 114 formed at the front of the scour prevention band 11 formed in the shape of a square block.

In addition, the inlet 114 is formed inside the water channel 116 having a constant diameter so as not to be exposed to the outside, a plurality of drain holes 115 formed of a small diameter at the rear end is configured.

In the upper portion of the square block, the front surface is inclined so as to receive less resistance from water and is formed to have a predetermined width, and a plurality of fitting grooves 113 having different sizes are formed in the longitudinal direction on the inner surface.

In addition, the upper contact surface 111 is provided with an anchor hole (111a) is formed to be integrally horizontally extended to the upper rear formed with the fitting groove 113, the anchor bolt 111b is fastened around the inner center.

Subsequently, a vertical inclined end having an outlet 115 formed at the rear of the upper contact surface 111 is horizontally formed integrally, and a cutout 117 is formed to allow water to flow at the bottom of the vertical inclined end.

The lower contact surface 118 is integrally formed forward with the bottom of the cutout 117 and is integrally connected to the rear of the bottom of the square block, and the center portion 112 is formed to correspond to the same configuration. Consists of Joe.

The vegetation block 12 is formed in the horizontal direction and the locking projection 121 in the bottom left and right so as to fit in the fitting groove 113 is surrounded by the four-sided partition and the bottom plate is formed of a mesh is gravel (a), culture soil (b) Aquatic plants (c) are installed and constructed.

In addition, the flow rate reduction plate 13 extends from the rear side of the fixed plate 131 in which the anchor hole 131a to which the anchor bolt 131b is fastened in the transverse direction is inclined to receive less water, and the bottom surface is horizontal. , The upper surface is inclined so as to increase the rear side, a plurality of vertical plate grooves 132 to which the vertical plate 133 is fastened to the inclined surface is formed in the transverse direction to constitute the scour prevention structure 10.

Referring to the operation of the present invention configured as described above are as follows.

2 to 3, the underwater structure 100 is formed of a horizontal fixed end 102 forming a step of the bridge 101 and the bridge foundation (103).

Looking at the assembly, the construction process of the scour prevention device 10, first so that each upper contact surface 111 is in close contact with the outer peripheral surface of the piers 101 to face the two scour prevention device 11, the lower contact surface 118 is in close contact with the riverbed.

Then, after the gravel (a) and the culture soil (b) are sequentially installed in the vegetation block 12, the vegetation block (c) prepared by vegetation is inserted into the fitting groove 113, scour room The earth 11 is secured to the fixed end 102 by penetrating through the anchor hole 111a using the anchor bolt 111b.

Subsequently, the flow rate reduction plate 13 to which the plurality of vertical plates 133 are fixed to the river bottom of the front surface on which the scour prevention tool 11 is installed is positioned and then the anchor plate 131b is used to reduce the flow rate reduction plate. Through the anchor hole (131a) formed in the fixing plate 131 provided in front of the (13) fixed to a solid ground of the bottom of the river while the river water flows in a pair of two to the position of the water structure 100 It will be assembled and constructed on the left and right sides.

As shown in FIG. 5, the action of the scour prevention tool 10 assembled and constructed as described above, when the river water flows, the river water having a small flow velocity is downstream to the upper left and right sides where the scour prevention device 11 is constructed. The stream water, which flows and is reduced in flow velocity by the vegetation block 12 formed between the pair of scour prevention tools 11, is formed between the scour prevention tool 11 and the underwater structure 100 ( Slowly flows into 112 and exits to the incision 117.

In addition, the stream water of the bottom portion of the stream having the fastest flow rate flows in front of the scour prevention device 11 in a state in which the flow velocity is drastically reduced by a plurality of vertical plates 133 installed in the flow rate reduction plate 13. Is introduced into the inlet 114 to flow along the waterway 116 to the drain 115.

At this time, the inlet port 114 has a large inlet diameter, the drain port 115 is formed in a small diameter so that the flow rate is rapidly increased when exiting the river water and the drain port 115, scour prevention port 11 or the underwater structure 100 It does not cause the vortex at the rear of the flows straight out.

As described above, the present invention is located at the top of the bottom surface of the submerged structure buried in the river bottom and fixed to close the pier and the foundation of the scaffold to be constructed in two pairs, the underwater structure and the river bottom portion adjacent It is effective to prevent scour.

In addition, by fixing the flow rate reduction plate formed with a plurality of vertical plates on the front river floor in which the scour prevention device is installed, there is an advantage of reducing the flow rate of the river runoff to reduce the resistance due to the flow rate.

In addition, a large diameter inlet is formed in front of the scour prevention port, and a plurality of small diameter outlets are formed in the rear, so that the river flows through the inlet at a high flow rate so as not to disturb the flow of water and to prevent scouring. In addition, it has the effect of improving the anchoring force of the underwater structure and scour prevention device.

In addition, the central part except the upper and lower parts where the scour prevention device is fixed is formed to allow the water to flow naturally, and the vegetation block in which aquatic plants are planted is fixed between the front of the pair of scour prevention bars to reduce the flow rate of the river water. It has the effect of providing habitats and resting places for animals and aquatic life.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and is not limited to the spirit of the present invention. Various changes and modifications can be made by those who have

Claims (1)

In the scour prevention bar for preventing the scour of the bridge pier of rivers and seas, A plurality of inlets 114 are formed in the front of the bottom portion formed in the shape of a square block, and the inlets 114 form a channel 116 having a constant diameter, but a plurality of drains 115 formed of a small diameter at the rear end are configured. And, the upper portion of the rectangular block is inclined so as to receive less resistance to water has a certain width and a plurality of fitting grooves 113 having a different size on the inner side is formed in the longitudinal direction, integrated into the upper rear formed with the fitting groove 113 Horizontally extending to the inner center is provided with an upper contact surface 111 is formed with an anchor hole (111a) is fastened to the periphery of the anchor bolt (111b), the vertical inclined end formed with a discharge port 115 in the horizontally extended rear The inclined portion 117 is formed to allow the water to flow in the bottom of the vertical inclined end, and forms a bottom contact surface 118 forward integrally with the bottom of the incision 117 and integrally at the rear of the bottom of the square block. Leads to And a space portion which prevents scour 112 is formed in a configuration corresponding to two one set to be formed in the same configuration table 11, On the left and right sides of the bottom projections 121 are formed in the transverse direction and surrounded by four-sided partition wall, the bottom plate is formed of a mesh, gravel, culture soil is laid, the vegetation block 12 vegetation plants and vegetation, The anchor hole 131a to which the anchor bolt 131b is fastened in the transverse direction extends to the rear of the inclined fixing plate 131 to receive less water resistance so that the bottom surface is horizontal and the upper surface is higher. Scour prevention structure of the foundation part of the piers, characterized in that consisting of a flow rate reducing plate 13 is formed in the transverse direction to be inclined, vertical plate 133 is fastened to the inclined surface.

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