KR20110046209A - Bridge bridge foundation reinforcement and scour prevention construction method and structure - Google Patents

Abstract

The present invention relates to a bridge bridge foundation reinforcement and scour prevention construction method and its structure, by mounting a bag filled with local dredging sand around the bridge foundation, and then tied with a rope, the construction is simple and the construction period and construction cost It can be drastically reduced, can prevent water pollution caused by rust and can be used permanently. Local dredged soils can be used to reinforce bridge foundations and prevent scours, and to remove soil piled up in riverbeds. In addition, by building a dredging sand bag around the foundation of the bridge, it is easy to reinforce the connection by checking the quality of construction by binding it with one rope. Easy repair and replacement in case of breakage.

Bridge bridge foundation reinforcement and scour prevention construction method of the present invention for this purpose, (a) constructing a bridge on the foundation ground; (b) filling the turret with dredge sato around the bridge construction; (c) installing a plurality of the bags around the lower portion of the piers; And (d) connecting the bag with a rope and binding the bag with one of the piers.

Bridges, Piers, Reinforcement, Scour Prevention, Bags, Sato, Geotextiles, Shields, Ropes

Description

Method of Construction for Scour Prevension And Reinforcement Of Bridge Pier, And Structure Of The Same}

The present invention relates to a bridge bridge foundation reinforcement and scrubbing prevention construction method and structure thereof, and more specifically, by mounting a bag filled with local dredging soil around the bridge foundation, and then bound by one rope, construction is simple and construction period and The present invention relates to a bridge bridge foundation reinforcement and scour prevention construction method and structure thereof that can not only drastically reduce construction cost but also can be permanently used.

In general, the foundation is formed in the bottom of the bridge piers across the river, river, etc. in a well shape or a square pillar shape.

Most of the bridge foundations of the bridges are installed in a state where some or all of them are submerged in water, and as time passes, erosion or erosion of the surrounding ground occurs by the flowing water. Therefore, the reinforcement is performed through various reinforcement devices and reinforcement methods using the same.

The method for reinforcing the bridge foundation of the bridge is to install the formwork to maintain a certain distance from the outside of the bridge foundation, and to reinforce the reinforcing bar in the middle of the formwork and the well, and then cast concrete, Prior to the installation, the construction of temporary screening works is carried out to build banks around the piers or to embed sheet piles to prevent water access.

The bridge foundation reinforcement method of the conventional bridge made as described above is a formwork installation work separately from the temporary barrier, the work is cumbersome and waste of additional equipment and cost required for installation.

In addition, since the formwork installed after the temporary film work is difficult to fix by maintaining a certain distance from the outer surface of the bridge foundation, it is first fixed by electric welding to the reinforcing bars. Therefore, the dismantling operation of the formwork is complicated and difficult, and if it is not dismantled, the formwork is corroded, resulting in water pollution.

In addition, in the conventional bridge foundation reinforcement method of the bridges made as described above, if the clogging through the seat pile, the length of the pile pile is constant on the floor located in the water regardless of the surrounding topography of the bridge foundation may be a weak part. .

Then, with reference to the accompanying drawings will be described in more detail for the conventional bridge bridge foundation scrubbing method and its problems.

1 to 4 is a view showing a conventional bridge bridge foundation scour prevention method, Figure 1 is a cross-sectional view showing a scour prevention method using sandstone, Figure 2 is a cross-sectional view showing a scour prevention method using a gabion hole, Figure 3 Is a cross-sectional view showing a scour prevention method using a sheet pile, Figure 4 is a cross-sectional view showing a scour prevention method using a concrete block mat.

First, the scour prevention method using the sandstone of Figure 1 is easy for temporary and emergency construction and can be underwater construction, there is a disadvantage in the construction efficiency (construction quality) is low and the construction efficiency when dropped underwater. And since there is no interconnection between the sandstone and the sandstone, the construction is close to elliptical shape, so there is a risk of falling in the event of flooding or heavy rain.At this time, the felled sandstone may collide with the lower bridge and cause safety accident and defect There is.

And the scour prevention method using the gabion perforation of FIG. 2 is easy for temporary and emergency construction and can be underwater construction like the four stone method, it is difficult to confirm the construction efficiency (construction quality) when the water is dropped and the corrosion of the wire mesh This has a short lifespan. In addition, there is a fear of loss due to displacement due to scour in flooding or heavy rain, and there is a fear that a second local scour may proceed as the lost gabions accumulate downstream.

In addition, the scour prevention method using a sheet pile of FIG. 3 is a construction method when the support base is deep, so that sufficient load transfer can be achieved by driving a plurality of piles to reach the support base. A footing is installed over a plurality of piles and a pier column is installed in the footing.

The scour prevention method using the sheet pile is semi-permanent, has excellent rigidity and good safety of the substructure, but underwater construction is impossible, construction efficiency is low, temporary screening is required, and scour may occur outside the pile. . In addition, there is a problem of post-treatment of the residue of the trench due to excessive amount of excavation during construction, and it requires a lot of work space, so it is difficult to simultaneously proceed with the work, and thus a lot of construction period is required. In addition, when driving small piles, noise and vibration are severely generated, causing civil complaints, and when foundation foundation is gravel layer, the driving and penetration of piles are difficult, and only the piles are supported by piles, making them vulnerable to lateral pressure. There is this.

Finally, the scour prevention method using the concrete block mat of Figure 4 is easy to check the quality, such as the connection of the concrete block mat and assembled on the land, the construction efficiency is high and can be installed according to the surface area. In addition, the low center of gravity planar, all the blocks are connected, there is no fear of loss of conduction in the case of red sand or heavy rain, there is an advantage that can be underwater construction. However, the scour prevention method using the concrete block mat has a disadvantage in that the construction cost is much higher than the other construction methods, the construction using a large crane.

In addition, the conventional scour prevention methods are affected by the impact of acidity, alkalinity, salinity and flowing rocks of the flowing water because the foundation structure of the existing piers, especially underwater foundations are always in contact with the water Over time, it causes scour, the surface of which is corroded and damaged. At this time, the scour phenomenon is progressed slowly in the water, so it is not easily detected, and may develop to a level that hinders the safety of the bridge after a long time. The foundation of the damaged pier is repaired by underwater work by placing and filling underwater concrete with scoured areas, or by installing water barriers around the pier foundation, draining the water in the partitioned space, and performing repair work. have.

However, as is well known, underwater work is difficult to carry out for a long time, so the construction period is longer than necessary, and the water barrier must be installed firmly to withstand the water pressure, so the work of dismantling and removing it after completion of construction There is a problem that must be accompanied. In addition, in the conventional repair method, since the concrete layer filling the scoured site falls off again, the repair effect could not be greatly expected.

Technical problem to be solved by the present invention in order to solve the above-mentioned problems, by mounting a bag or a two or more steps around the pier foundation filled with local dredging soil, and binds with one rope, construction is easy and construction period and The purpose of this study is to present a bridge bridge foundation reinforcement and scour prevention construction method and structure that can drastically reduce construction cost.

In addition, another technical problem to be achieved by the present invention is to propose a bridge bridge foundation reinforcement and scour prevention construction method and its structure that can prevent water pollution due to rust generation and can be used permanently.

In addition, another technical problem to be achieved by the present invention is to propose a bridge bridge foundation reinforcement and scour prevention construction method and structure that can be used to reinforce the bridge foundation and at the same time prevent scour using local dredged soil.

In addition, another technical problem to be achieved by the present invention is to not only enable the foundation reinforcement and scour prevention of bridge bridges, but also the bridge bridge foundation reinforcement and scrubbing construction method and structure that can remove the soil piled up on the river floor together with the structure To present.

In addition, another technical problem to be achieved by the present invention is to build a dredged sanding bag around the bridge foundation and bind it together with a rope to strengthen the connectivity and easy construction of bridge bridge foundation reinforcement and scour prevention construction method and its structure To present.

In addition, another technical problem to be achieved by the present invention is to propose a bridge bridge foundation reinforcement and scour prevention construction method and structure there is no fear of loss in flood or heavy rain due to self-weight increase (350 tons or more) .

In addition, another technical problem to be achieved by the present invention is to propose a bridge bridge foundation reinforcement and scour prevention construction method and its structure that is easy to repair and replace when broken.

As a means for solving the above-described technical problem, the invention as set forth in claim 1, "In the bridge bridge foundation reinforcement and scour prevention construction method, (a) constructing a bridge on the foundation ground; (b) filling the turret with dredge sato around the bridge construction; (c) installing a plurality of the bags around the lower portion of the piers; And (d) connecting the bag with a rope and binding the bag with one of the bridge piers.

According to the invention of claim 2, "The bridge bridge foundation reinforcement and scour prevention construction method is a bridge bridge foundation reinforcement of Claim 1 characterized by providing a protective film around the lower part of the bridge in which the bag is installed. Scrubbing prevention construction method.

The invention according to claim 3 provides the method according to claim 2, wherein the protective film is a PE cushion sheet or a PE cushion pad.

The invention according to claim 4 provides "the method according to claim 1, wherein the pier is constructed at a site in which the foundation ground is dug to a predetermined depth. '

The invention according to claim 5 provides "the method of claim 1, wherein the pier and the bag are constructed in a position in which the foundation ground is dug to a predetermined depth. do.

The invention according to claim 6 provides "the method according to claim 4 or 5, wherein the predetermined depth has a range of 2 to 7 m.

The invention as set forth in claim 7, wherein the bag and the rope is: Geosynthetic material or polyethylene terephthalate (PET) or polypropylene (polypropylene), bridge bridge foundation reinforcement and scour prevention construction Method.

The invention according to claim 8, "The method according to claim 1 or 7, wherein the bag: a bridge bridge foundation reinforcement and scour prevention construction method characterized in that a plurality of connecting rings for connecting the rope on the outer surface is provided. .

According to the ninth aspect of the present invention, "The bridge bridge foundation reinforcement and scour prevention construction method according to claim 1 includes: a bridge provided with one or two or more stages of the bag around the lower portion of the bridge. Bridge foundation reinforcement and scour prevention construction method.

The invention according to claim 10 provides "The method of claim 1, wherein the foundation ground is any one of a river, a river, and a land. '

As a means for solving the above-described technical problem, the invention described in claim 11, "In the bridge bridge foundation reinforcement and scour prevention construction structure, bridge piers constructed on the foundation ground; A plurality of bags installed in one or two or more stages around the lower portion of the pier and filled with dredged soil; And a bridge for binding the plurality of bags to the bridge and one by one stage. Bridge foundation reinforcement and scour prevention construction structure comprising a.

The invention according to claim 12, "The bridge bridge foundation reinforcement and scour prevention construction structure of Claim 11: The bridge bridge foundation reinforcement and scour of the bridge bridge characterized by the above-mentioned. Prevent construction structures.

The invention according to claim 13 provides "The bridge pier foundation reinforcement and scour prevention construction structure according to claim 12, wherein the protective film is a PE cushion sheet or a PE cushion pad.

The invention as set forth in claim 14 provides the bridge bridge foundation reinforcement and scour prevention construction structure according to claim 11, wherein the bridge is constructed in a position in which the foundation ground is dug to a predetermined depth.

The invention as set forth in claim 15, wherein the bridge and the bag are constructed in a position in which the foundation ground is dug to a predetermined depth. Bridge bridge foundation reinforcement and scour prevention construction structure. do.

The invention according to claim 16 provides "The bridge bridge foundation reinforcement and scour prevention construction structure according to claim 14 or 15, wherein the predetermined depth is in the range of 2 to 7 m.

The invention as set forth in claim 17, wherein the bag and rope are made of geosynthetic material or polyethylene terephthalate (PET) or polypropylene. Structure. ”

The invention as set forth in claim 18, wherein the bag is provided with: a plurality of linking rings for connecting the rope to an outer side of the bridge bridge foundation reinforcement and scour prevention construction structure .

The invention as set forth in claim 19, wherein the bag is characterized in that: the height is about 2.0 m and the width (length) is in the range of about 20 m to 50 m. And anti-washing construction structure.

According to the present invention, by stacking the turret filled with local dredging sand around the bridge foundation and binding with one rope, it is easy to construct, significantly reduce the construction period and construction cost, and prevent water pollution by rust generation It has the effect that it can and can be used permanently.

In addition, it is possible to reinforce the piers foundation and prevent scour at the same time by using local dredged soil and to remove the soil piled up on the bottom of the river.

In addition, by building dredging sand bags around the bridge foundations and binding them together with a rope, it is possible to strengthen the connection and check the construction quality, and it is possible to underwater construction without fear of loss due to flooding or heavy rain due to self weight increase (350 tons or more). It works.

In addition, it is easy to repair and replace the dredged sandbag.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Hereinafter, specific technical contents to be implemented in the present invention will be described in detail with reference to the accompanying drawings.

Embodiment of Bridge Bridge Foundation Reinforcement and Scour Prevention Construction Structure

5 and 6 are a cross-sectional view and a plan view showing a bridge bridge foundation reinforcement and scour prevention construction structure according to a preferred embodiment of the present invention.

Bridge bridge foundation reinforcement and scour prevention construction structure of the present invention, as shown in Figure 5 and 6, the pier 100 constructed on the foundation ground 10 of the river or river, and the lower circumference of the pier 100 It is composed of a plurality of bags 200 installed in one or two or more stages, and the rope 210 for binding the plurality of bags 200 to the piers one by one.

The pier 100 is a pillar supporting the bridge, and is composed of a lower pier (see 110 in FIG. 12), a pier pillar (see 120 in FIG. 12), and an upper pier (130 in FIG. 12).

Conventional general bridge construction method is constructed as a method of laying the bridge on the bridge foundation formed by laying the foundation concrete part in the pile embedded in the ground, in the present invention, the foundation ground 10 without a pile embedded in the ground to a predetermined depth It is constructed of concrete at the site of digging with (L). At this time, the depth (L) to dig the foundation ground 10 to install the pier 100 is preferably in the range of 2 to 7m when the foundation ground 10 is formed of sand. However, it is not necessarily limited to this value, and may be different in the case where the pier is installed and the type of the foundation ground, that is, when the rock layer is formed under the foundation ground or the foundation ground is formed as the rock layer.

After the pier 100 is constructed, a protective film (see 140 in FIG. 13) is installed around the lower circumference of the pier 200 where the bag 200 is installed. The protective layer 140 is installed to mitigate the impact transmitted from the weight of the bag 200, and uses a shock absorbing material including a PE cushion sheet or a PE cushion pad. Here, the used PE cushion sheet or PE cushion pad is a high density foamed non-crosslinked polyethylene foam, which has excellent buffering, insulating, heat insulation, moisture proofing, and soundproofing effects, and is widely used depending on the application throughout the industry.

The bag 200 installed around the lower portion of the pier 200 and the ropes 210 surrounding the bag 200 are made of geotextile material, polyethylene terephthalate (PET), or polypropylene material, and the bag 200 It is filled with dredging sand inside. At this time, it is preferable to use dredging sand collected from the surroundings of the bridge construction, and should be filled with an appropriate weight (for example, 350ton / EA in the case of a 40m bag) according to the size of the bag 200.

The reason for filling the bag 200 in the dredged soil collected around the bridge construction is not only easy to work, but also significantly reduce the construction cost and construction period. In addition, if the dredging sand is collected from the river or river around the bridge construction can remove the soil on the bottom of the river or river can reduce the river or river level during heavy rains can prevent the flood.

The bag 200 is provided with a plurality of connecting rings (see 201, 202 of FIG. 8) for connecting the rope on the outer side, and the detailed configuration will be described in detail later in FIG.

Referring back to FIG. 5, after the piers 200 are constructed, the protective film 140 is installed around the lower portion of the piers 200, and then the piers are enclosed with the protective film 140. Install the dredged sanding bag 200 filled with dredged sand around the bottom of the (200). At this time, the installation method should be constructed by interlocking the dredged sand bags 200, and in the case of scour prevention ball should be installed in a structure that can be applied to minimize local scour factor.

In addition, when constructing the dredged sanding bag 200 around the lower periphery of the pier 200, backfilled to the average bottom elevation, and the perforated area outside the trench area should be installed after stopping in accordance with the surrounding average bottom elevation.

The dredging satin turret 200 is usually mated at the bottom end (stage 1) and mated, and is constructed by interlocking each other so that the gap between the turret 200 and the turret 200 does not have an error of 1 mm. In addition, the foundation ground 10 on which the dredging sand bag 200 is installed should be smoothly installed so that there is no leakage of soil after construction of the dredging sand bag 200.

When the dredging sand bag 200 is constructed in two or more stages, depending on the conditions of the site, the progress of the construction and the expected weather conditions, and the sleep conditions, to what extent the first stage should be installed before the second stage is increased. Determine and construct. In this case, when the dredge sato bag 200 is mounted more than two stages, only one stage should not be continued, and it should be mounted so that the stage is well woven. And in order to prevent the outflow of sediment at the bottom of the ground plane by the water flow, it is selectively installed, it is determined whether to use the sorting according to the particle size of the bed.

After mounting the dredging sand bag 200, the contractor or worker checks whether the dredging sand bag 200 is installed in the correct position, there is no local space for the appearance, the arrangement and interlocking state and the proximity construction is good do. In this case, if there is no abnormality, the rope 210 is inserted into the connecting rings 201 and 202 of the dredged sand bag 200 and the pier 100 is coupled to one. If the dredge sato bag 200 is incorrectly installed, it must be reinstalled according to the supervisor or orderer's instructions.

As such, the dredged sand bag 200 installed around the lower portion of the pier 100 has a weight of about 350 tons / EA per rope when it is 2 m (height) x 40 m (width) and the rope 210 Since the pier 100 and the one is bound by one, it is possible to fully support and reinforce the pier 100 and to prevent the scour of the bridge foundation.

In addition, the bag 200 installed around the lower portion of the pier 200 and the rope 210 surrounding it are made of geosynthetic material, polyethylene terephthalate (PET), or polypropylene material. You can,

In addition, since the construction to reinforce and prevent scouring the pier 100 by using the dredging sand around the bridge construction, the construction is simple and can significantly reduce the construction period and construction costs, and prevent water pollution due to rust generation can do.

In addition, by building dredging sand bags around the bridge foundations and binding them together with a rope, it is possible to strengthen the connection and check the construction quality. Do.

In addition, even if the dredged sand bag 200 is damaged by a south wave line or the like, it is easy to repair and replace the damaged part or replace the broken bag.

Another embodiment of bridge bridge foundation reinforcement and scour prevention construction structure

7 is a cross-sectional view showing the bridge bridge foundation reinforcement and scour prevention construction structure according to another embodiment of the present invention.

Bridge pier foundation reinforcement and scour prevention construction structure shown in Figure 7 is an example in which the bridge 100 and the dredged sand bag 200 is installed together in a position to dig the foundation ground 10 to a predetermined depth (L) It is shown. At this time, the depth (L) of digging the foundation ground 10 to install the pier 100, as in Figure 5, when the foundation ground 10 is formed of Sato usually has a range of 2 to 7m It is preferable. However, it is not necessarily limited to this value, and may be different in the case where the pier is installed and the type of the foundation ground, that is, when the rock layer is formed under the foundation ground or the foundation ground is formed as the rock layer.

Embodiment of the dredging sand bag 200

8 is a view showing a dredging sand bag 200 used in the present invention.

As described above, the bag 200 is composed of a geotextile material or polyethylene terephthalate (PET) or polypropylene (polypropylene) material, the connecting ring (201, 202) for connecting the rope 210 to the outer surface Two rows are installed, and dredged sand is loaded in the interior space. At this time, it is preferable to use dredging sand collected at the periphery of bridge construction.

The bag 200 has a size of 2.0m (height) × 20m (width = length), 2.0m × 30m, 2.0m × 40m, 2.0m × 50m, and the like. Tensile strength of the bag 200 is about 250KN / M, the weight is about 350 tons / EA in the case of loading 2.0m × 40m when dredged sand.

FIG. 9 is a partially enlarged view illustrating a mode in which the dredged sandbags 200 stacked around the bridge piers 100 are bound together using a rope 201.

The dredged sandbags 200 should be constructed by interlocking each other so as not to create a space therebetween, and if the arrangement and interlocking state and close construction are good, the rope 210 is separated into the connecting rings 201 and 202 by one step (one step, two steps). End) and bind to one of the piers 100. By the structure in which the dredged sandbag 200 and the pier 100 are bound to one, the pier 100 may be supported and reinforced, and the scour of the pier foundation may be prevented.

Embodiment of bridge bridge foundation reinforcement and scour prevention construction method

10 to 15 are cross-sectional views showing the bridge bridge foundation reinforcement and scour prevention construction method according to a preferred embodiment of the present invention in the order of process.

First, referring to FIG. 10, a hole (peg) for constructing a pier in the foundation ground 10 of a river or river 20 is formed to a predetermined depth L. At this time, the depth (L) is preferably having a range of 2 to 7m when the foundation ground 10 is formed of sand.

After the foundation is dug to the predetermined depth (L) to the concrete by a known method to form a lower pier (110) (see Fig. 11), the pier pillar 120 and the upper pier 130 ) Are formed sequentially (see FIG. 12).

After the pier 100 is completed, a protective film 140 is installed around the lower circumference of the pier 100 where the dredged sand bag 200 is installed (see FIG. 13). At this time, the protective layer 140 is preferably a material having a cushioning material and a waterproof function, that is, PE cushion sheet or PE cushion pad.

Subsequently, the bag 200 loaded with dredged sand is mounted on one or two or more stages so as to interlock with each other. Here, the dredged sand soil loaded on the bag 200 is loaded using the dredged sand soil collected around the bridge construction.

After mounting the dredging sand bag 200, the contractor or worker has checked whether the dredging sand bag 200 is installed in place, there is no local space for the appearance, the arrangement and interlocking state and close construction is good. Next, if there is no abnormality, the rope 210 is inserted into the linking rings 201 and 202 of the dredging sand bag 200, and the pier 100 is coupled to one (see FIG. 15). If the dredge sato bag 200 is incorrectly installed, it is reinstalled according to the supervisor or orderer's instructions.

As described above, the bridge bridge foundation reinforcement and scour prevention construction method and the structure of the present invention can solve the technical problem of the present invention by stacking a bag filled with local dredging soil around the bridge foundation, and then binding it with a rope.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. It will be appreciated that such modifications and variations are intended to fall within the scope of the following claims.

Bridge bridge foundation reinforcement and scour prevention construction method and the structure of the present invention has been described taking the case of construction in rivers or rivers as an example, but is not limited to this can be applied to the same land.

1 to 4 is a view showing a conventional bridge bridge foundation scour prevention method,

1 is a cross-sectional view showing a scour prevention method using sandstone,

2 is a cross-sectional view showing a scour prevention method using a gabion hole,

3 is a cross-sectional view showing a scour prevention method using a sheet pile (sheet pile),

Figure 4 is a cross-sectional view showing a scour prevention method using a concrete block mat.

5 and 6 are a cross-sectional view and a plan view showing the bridge bridge foundation reinforcement and scour prevention construction structure according to a preferred embodiment of the present invention

7 is a cross-sectional view showing the bridge bridge foundation reinforcement and scour prevention construction structure according to another embodiment of the present invention

8 is a view showing a dredge sand bag 200 used in the present invention.

9 is a partially enlarged view showing a state in which the dredged sandbags 200 stacked around the bridge piers 100 are bound together using a rope 201.

10 to 15 is a cross-sectional view showing the bridge bridge foundation reinforcement and scour prevention construction method according to a preferred embodiment of the present invention in the order of process

[Description of Code for Major Parts of Drawing]

10: ground (foundation ground) 20: river or river

100: pier 200: dredge sato turret

201, 202: Hook 210: Rope

110: lower piers 120: piers

130: upper pier 140: protective film

Claims (19)

In bridge bridge foundation reinforcement and scour prevention construction method, (a) constructing a pier on the foundation ground; (b) filling the turret with dredge sato around the bridge construction; (c) installing a plurality of the bags around the lower portion of the piers; And (d) connecting the bag with a rope to bind the pier to one; Bridge piers foundation reinforcement and scour prevention construction method comprising a. The method of claim 1, wherein the bridge bridge foundation reinforcement and scour prevention construction method is: Bridge bridge foundation reinforcement and scour prevention construction method characterized in that the protective film is installed around the lower portion of the bridge where the bag is installed. The method of claim 2, wherein the protective film is: Bridge bridge foundation reinforcement and scour prevention construction method characterized by using a PE cushion sheet or PE cushion pad. The pier of claim 1, wherein the piers are: Bridge piling foundation reinforcement and scrubbing construction method, characterized in that the construction of the foundation ground to a predetermined depth. The method of claim 1, wherein the piers and bags are: Bridge piling foundation reinforcement and scrubbing construction method, characterized in that the construction of the foundation ground to a predetermined depth. 6. The method of claim 4 or 5, wherein the predetermined depth is: Bridge piers foundation reinforcement and scrubbing construction method characterized in that it has a range of 2 to 7m. The method of claim 1, wherein the bag and rope are: Bridge bridge foundation reinforcement and scour prevention construction method characterized in that consisting of geotextile material or polyethylene terephthalate (PET) or polypropylene (polypropylene) material. 8. The bag of claim 1 or 7, wherein the bag is: Bridge bridge foundation reinforcement and scour prevention construction method characterized in that a plurality of connecting rings are installed on the outer surface for connecting the rope. The method of claim 1, wherein the bridge bridge foundation reinforcement and scour prevention construction method is: Bridge piers foundation reinforcement and scour prevention construction method characterized in that the bag is installed in one or two or more stages around the lower circumference of the bridge. The method of claim 1, wherein the foundation ground is: Bridge bridge foundation reinforcement and scour prevention construction method characterized in that any one of the river, river, land. In bridge bridge foundation reinforcement and scour prevention construction structure, Piers constructed on foundation ground; A plurality of bags installed in one or two or more stages around the lower portion of the pier and filled with dredged soil; And A rope that binds the plurality of bags to each of the piers one by one; Bridge piers foundation reinforcement and scour prevention construction structure comprising a. 12. The method of claim 11, wherein the bridge bridge foundation reinforcement and scour prevention construction structure is: Bridge piers foundation reinforcement and scour prevention construction structure, characterized in that the protective film is installed around the lower portion of the bridge where the bag is installed. The method of claim 12, wherein the protective film is: Bridge pier foundation reinforcement and scour prevention construction structure using PE cushion seat or PE cushion pad. The method of claim 11, wherein the piers are: Bridge piers foundation reinforcement and scour prevention construction structure, characterized in that the foundation was constructed in the excavated to a predetermined depth. The method of claim 11, wherein the piers and bags are: Bridge piers foundation reinforcement and scour prevention construction structure, characterized in that the foundation was constructed in the excavated to a predetermined depth. The method of claim 14 or 15, wherein the predetermined depth is: Bridge piers foundation reinforcement and scour prevention construction structure having a range of 2 to 7m. 12. The bag of claim 11, wherein the bag and rope are: Bridge bridge foundation reinforcement and scour prevention construction structure consisting of geosynthetic material or polyethylene terephthalate (PET) or polypropylene (polypropylene) material. 18. The bag of claim 11 or 17, wherein the bag is: Bridge pier foundation reinforcement and scour prevention construction structure, characterized in that a plurality of connecting rings are installed on the outer surface for connecting the rope. 18. The bag of claim 11 or 17, wherein the bag is: Bridge bridge foundation reinforcement and scour prevention construction structure characterized in that the height is about 2.0m, the width (length) has a range of about 20m to 50m.

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