KR102475974B1 - A repairing method for column type underwater structures - Google Patents

Abstract

The present invention relates to a method for repairing and reinforcing an underwater structure, comprising: cleaning and measuring a standard of a repaired and reinforced part of a damaged underwater structure; A parts manufacturing step of manufacturing flanges, guide rails, transverse connecting wires and panels according to the measured standards; An on/off valve attaching step of attaching an on/off valve to the flange A; A flange attachment step of attaching an upper flange and a lower flange to the upper and lower parts of the underwater structure repair/reinforcement area; Guide rail installation step of inserting a plurality of guide rails having flange coupling parts formed at both ends and having one or more wire insertion holes and anchor bolt insertion holes formed on the side of the body between the upper flange and the lower flange and fixing them to the underwater structure with anchor bolts ; A transverse connection wire installation step of inserting a transverse connection wire into a transverse connection wire insertion groove formed in the guide rail and winding the transverse connection wire around the underwater structure from the bottom to the top; A panel attachment step of installing panels at both ends inside the upper and lower flanges and fastening them with fastening bolts; A sealing step of sealing by applying a waterproof epoxy sealing agent to the joint of the underwater structure, flange and panel; A hose connection step of connecting hoses for an inlet and an exhaust port to the closing valve of the lower flange A and the closing valve of the upper flange A; a drainage step of injecting air into the panel through the exhaust port and draining water inside the panel through the inlet; A filler injection step of injecting a filler through an inlet while discharging air inside the panel through an exhaust port; and a hose removal step of closing the valves of the inlet and the exhaust port and removing the hose.

Description

A repairing method for column type underwater structures}

The present invention relates to a method for repairing and reinforcing damaged underwater structures, and more particularly, for repairing and reinforcing columnar bridges, piers, abutments and water intake towers constructed underwater such as seas, rivers, dams, reservoirs, etc. ·Washing and measuring the size of the reinforced area, parts manufacturing, opening/closing valve attachment, flange attachment, guide rail installation, transverse connection wire installation, panel attachment, sealing, hose connection and drainage, filling material injection It relates to a method for repairing and reinforcing underwater structures without water barrier construction.

Underwater structures such as piers, abutments, piers, steel pipe piles, concrete piles, quay walls, and water intake towers constructed in rivers, seas, dams, reservoirs, etc. Separation occurs, the reinforcing bars are exposed, and when the exposed reinforcing bars are combined with oxygen, they become iron oxide and increase in volume, resulting in cracks in the structure and cross-section damage, which deteriorates the durability and support function of the structure.

In order to prevent deterioration of the durability and support function of underwater structures, the progress of damage is periodically checked and safety inspections are conducted to ensure good maintenance.

When a defect is found in an underwater structure, concrete must be poured on the cross section of the damaged structure. For this purpose, a water barrier construction to block water is essential, resulting in a delay in the construction period and an increase in construction cost.

Various studies have been conducted to improve these problems, and in Korean Patent Publication No. 10-2011-0123453, steel piles are driven around piers and abutment underwater structures to install formwork to surround the structure, drain water with a water pump, and It is about a method of restoring the damaged cross section by arranging the damaged surface, drying the structure, and then pouring concrete, but there is a problem in that the construction period is long and the construction cost increases.

Korean Registered Patent No. 10-2049538 installs a gap space and a fiberglass jacket in an underwater structure, uses an epoxy sealing material or epoxy resin on the bottom to prevent water inflow, removes foreign substances from the surface of the structure, and applies epoxy resin to the damaged structure However, the above technology is expected to have a problem in improving the durability of the structure because there is no configuration corresponding to the framework for fixing the reinforcing material around the structure.

Republic of Korea Patent Publication No. 10-2004-0034650 removes foreign substances from the surface of an underwater structure, fixes an umbrella rib anchor to the surface damaged by delamination and exfoliation, produces a composite fiber formwork according to the shape of the structure, fixes it to the structure, and then fixes it between the structure and the formwork. A method of sealing the cross section with an epoxy sealing material, removing water inflow into the formwork to maintain a vacuum state, and injecting mortar and epoxy injection materials, or a method of restoring one side of a damaged structure and blocking contact with water or air at the damaged part. method of repair and reinforcement. Although the effect of blocking contact with air at the damaged area is expected, it is expected that there will be a problem in improving the durability of the structure because the structure corresponding to the skeleton supporting the stiffener is poor.

Republic of Korea Patent Publication No. 10-2011-0123453 Republic of Korea Patent No. 10-2049538 Republic of Korea Patent Publication No. 10-2004-0034650

In order to solve the above problems, the present invention prevents peeling and peeling by uniting the damaged part of the underwater structure and the injection material, and uses a material that does not rust and corrode, which is chemically stable and durable after construction. This is supplemented to extend the life of the repaired and reinforced structure, supplement the bearing capacity of the damaged part to reinforce the bearing capacity weakened by damage, and reduce the construction period and cost by enabling construction without water barrier construction. made it a task.

In order to accomplish the above object, the present invention includes cleaning and standard measurement steps of the repair/reinforcement part of the damaged underwater structure 900; A component manufacturing step of manufacturing the flanges 100 and 110, the guide rail 200, the horizontal connection wire 400 and the panels 600 and 620 according to the measured standards; An on/off valve attaching step of attaching the on/off valve 130 to the flange A 100; A flange attachment step of attaching the upper flanges 110 and 120 and the lower flanges 110 and 120 to the upper and lower parts of the underwater structure repair/reinforcement area; A plurality of guide rails 200 having flange coupling parts 220 formed at both ends and one or more wire insertion holes 270 and anchor bolt insertion holes 250 formed on the side of the body are inserted between the upper flange and the lower flange. A guide rail installation step of fixing to an underwater structure with anchor bolts 300; A transverse connection wire installation step of inserting the transverse connection wire 400 into the transverse connection wire 400 insertion groove formed in the guide rail 200 and winding the transverse connection wire 400 around the underwater structure from the bottom to the top; Panel attachment step of installing panels (600, 620) on both ends of the upper and lower flanges (100, 110) and fastening them with fastening bolts (170); A sealing step of applying an epoxy sealing agent to the joints of the underwater structure, the flanges 100 and 110 and the panels 600 and 620 to seal them; Hose connection step of connecting the hose 800 for the inlet 700 and the exhaust port 750 to the shut-off valve 130 of the lower flange A and the shut-off valve of the upper flange A; a drainage step of introducing air into the panel through the exhaust hole 750 and draining water inside the panel through the inlet 700; A filler injection step of injecting a filler through the inlet 700 while discharging air inside the panel through the exhaust port 750; and a hose removal step of closing the valves of the inlet 700 and the exhaust port 750 and removing the hose 800.

In the present invention configured as described above, the high-strength composite fiber and the filler are integrated in the damaged and deteriorated structure, and the durability and chemical resistance are improved, and the material due to corrosion, cracks, peeling, exfoliation, and scour is repaired and reinforced in the underwater structure. Since there is no separation phenomenon, damage caused by natural disasters such as typhoons, earthquakes, and floods is reduced.

1 is an exploded perspective view of a damaged underwater structure and an underwater structure repair/reinforcement device according to an embodiment of the present invention
2 is a perspective view of a flange according to an embodiment of the present invention
3 is a perspective view of a guide rail according to an embodiment of the present invention
Figure 4 is an explanatory view of the combination of the damaged structure and the flange and guide rail
Figure 5 is an explanatory view of the horizontal connection wire coupled to the guide rail
6 is an explanatory view of coupling a flange and a panel according to an embodiment of the present invention;
7 is an explanatory view in which a transparent panel is coupled to a damaged area;
8 is a completeness of a repaired and reinforced underwater structure
9 is a procedure diagram of a method for repairing and reinforcing an underwater structure according to the present invention

Hereinafter, a method for repairing and reinforcing an underwater structure according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 9. For convenience of explanation, the direction from the panel toward the damaged structure is referred to as the front-back direction, and the direction in which the horizontal connection wire is coupled to the side of the guide rail is defined as the lateral direction.

1 is an exploded perspective view of a damaged underwater structure and an underwater structure repair/reinforcement device according to an embodiment of the present invention, FIG. 2 is a perspective view of a flange according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. A perspective view of a guide rail according to an example, Figure 4 is an explanatory view of a damaged structure and a flange and a guide rail coupling, Figure 5 is an explanatory view of a transverse connection wire coupled to a guide rail, Figure 6 is an embodiment of the present invention 7 is an explanatory view of the combination of the flange and the panel according to, FIG. 7 is an explanatory view in which the transparent panel is coupled to the damaged part (900a), FIG. 8 is the completeness of the repaired and reinforced underwater structure, and FIG. 9 is the present invention It is a procedure diagram of the method of repairing and reinforcing underwater structures.

The present invention relates to a method for repairing and reinforcing damaged parts such as bridges, piers, abutments and water intake towers constructed in the sea, river, or underwater, such as dams and reservoirs, by reinforcing durability without water barrier construction, and is largely Cleaning and standard measurement step of washing and measuring the size of the damaged area (900a), part manufacturing step of manufacturing parts according to the measured standard, attaching the on-off valve to the manufactured flange, attaching the flange above and below the damaged part Flange attachment step, guide rail installation step of installing a guide rail inside the flange, horizontal connection wire installation step on the guide rail, panel attachment step to the outside of the horizontal connection wire, sealing the gap between the structure, flange and panel to block water It consists of a sealing step, a hose connection and drainage step to the opening and closing valve, a grout injection step into the inside of the panel, and a hose removal step of closing the inlet and outlet valves and removing the hose.

<Washing and standard measurement step>

In the washing and standard measurement step, the damaged part 900a of the damaged underwater structure 900 is removed by using a brush, high-pressure water or an air grinder, an air impactor, etc. to remove foreign substances, corrosive substances, water scale, etc. When it flows, the circumference of the structure, the width, height, and depth of the damaged portion are measured using a ruler, and if necessary, underwater photography is performed to accurately determine the size of the damaged portion 900a.

<Part manufacturing step>

The flanges 100 and 110, the guide rail 200, the horizontal connection wire 400, and the panels 600 and 620 that meet the measured standards are manufactured. The flange is made of rust-free stainless steel, zinc steel, etc., and is manufactured using bending or welding. The flange is composed of two types, flange A (100) to which the opening and closing device is attached and flange B (110) to which the opening and closing device is not attached. The flange has a large-radius rim extending in an arc shape and a small-radius rim connected by a connecting portion 150 to form a crank shape in cross section, and a coupling plate 120 formed with bolt holes is attached to both ends so that the flanges are fastened with bolts ( 170), and after being fastened to the structure, the connecting portion 150 becomes a locking jaw and becomes a pedestal to which the guide rail 200 and the panel are attached.

The guide rail 200 is a rod made of composite fibers and vertically installed on three or more underwater structures, between the flange coupling portion 220 extending in the front and rear directions on the upper and lower parts of the rod, and between the upper and lower flange coupling portions 220. A plurality of bi-directional spacing protrusions 240 protruding in the front and rear directions, a plurality of one-way spacing protrusions 245 protruding in one direction between the bi-directional spacing protrusions 240, anchor bolt insertion holes penetrating the bi-directional spacing protrusions 240 (250), it is configured in a form in which connecting bar insertion holes are formed at intervals of 100 to 300 mm on the side between the upper and lower flange coupling parts 220.

The composite fiber used in the guide rail 200 and the panel is prepared by putting 70% by weight of glass fiber or ceramic fiber in a mold made of metal at room temperature, merging 30% by weight of liquid epoxy or polyester, and then using a press to When pressed with a weight of 5 to 10 tons per piece and compressed for 20 to 30 minutes, the liquid epoxy or polyester hardens and becomes a hard solid material, and when the mold is removed, the molding of the product is completed. In order to simplify the mold frame, the bolt hole, the anchor bolt 300 insertion hole, and the wire insertion hole may be omitted, and after molding, the insertion hole may be processed with a drill.

The panel is made of two panel A (600) with a valve insertion hole (610) formed at a predetermined position and one or more panel B (620) without a valve insertion hole, and has an inner or outer thickness at both ends of the panel with a certain width. A stepped coupling portion 650 is formed by reducing in half to form a step, and a fastening protrusion 670 with a fastening hole 690 formed on the inside or outside of the stepped coupling portion 650 is vertically protruded to form a fastening bolt 170 ), and a general panel with a thickness of 3 to 6 mm can be used by bending the plate part in the form of winding it around an underwater structure even if it is made in the shape of a flat plate. It is preferable to manufacture in an arc shape using an arc mold.

Composite fibers used for the transverse connection wire 400 are manufactured by extrusion molding in a heated state. 70% by weight of glass fiber or ceramic fiber and 30% by weight of liquid epoxy or polyester are put into an extruder, heated at 150 to 180 ° C, extruded to a thickness of 4 to 16 mm, pulled out, and cooled. In order to increase the adhesion with the grout used in the process described later, a tightening device is coupled to the rear of the extruder, and after the composite fibers are discharged, the aperture is narrowed at regular intervals using the aperture tightening device before cooling, and the joint is connected to the transverse connecting wire 400. Forming may increase the surface area of the transverse connection wire 400 to improve adhesion with the grout.

The anchor bolt 300, the fastening bolt 170, the fastening nut 190 and the hose 800 may be used as off-the-shelf products. The fastening bolt 170 and the fastening nut 190 are preferably designed so that the sizes used for the flange and those used for the panel are the same.

<Stage of attaching the opening/closing valve>

An on/off valve 130 similar to a faucet is attached to the rim of the large radius of the flange A (100) fastened to the upper and lower parts of the damaged part of the structure, and is used as an exhaust port 750 when fastened to the upper part, and an inlet ( 700) is used. Flange B 110 is not attached to the on-off valve, and when the size of the structure is large, two or more flange B 110 may be combined.

<Flange attachment step>

When the repair/reinforcement parts are manufactured and the opening/closing valve is attached, the flange A (100) and the flange B (110) manufactured according to the standard around the lower circumference of the damaged part (900a) of the underwater structure are coupled so that the large-diameter parts of the flange B (110) face upward. do. The connecting portion 150 connected between the large-diameter portion and the small-diameter portion becomes a pedestal on which the guide rail 200 and the panel, which will be described later, are placed. The coupling of the flanges is fixed using the fastening bolt 170 and the fastening nut 190 through the bolt hole of the coupling plate 120. The flange coupled to the upper part of the damaged portion 900a is temporarily loosely coupled to a place higher than the size of the guide rail 200, and then firmly fixed after the guide rail 200, the transverse connection wire 400 and the panel are installed.

<Guide rail installation step>

Install the guide rail 200 by inserting it between the connection parts 150 of the flanges installed up and down. At least three protrusions of the guide rail 200 are erected vertically around the structure so that the long side of the guide rail 200 faces inward, and after forming a hole on the surface of the structure with a pneumatic or hydraulic drill through the anchor bolt insertion hole 250 The anchor bolt 300 is inserted into the anchor bolt insertion hole 250 and fixed to the structure. The gap adjusting protrusion functions to maintain a gap between the panel and the structure to form a space filled with grout.

<Horizontal connection wire installation step>

When the guide rail is installed, the transverse connection wire 400 is sequentially inserted into the wire insertion hole 270 formed in the lower or upper part of one guide rail to continuously wind 360 degrees around the structure as shown in FIG. It is fixed to the guide rail 200 using a binding line or a wire clip.

<Panel attachment step>

After the transverse connecting wire is installed on the guide rail, the panel is inserted between the upper and lower flanges and joined to the outside of the guide rail. Insert the on-off valve 130 attached to the lower flange into the valve insertion hole 610 of panel A 600, and insert panel B 620 into the upper part of the connection part 150 of the flange, then tighten the bolt 170 and Fix flange A and flange B using the fastening nuts 190.

<Sealing step>

When the panels are joined, fill gaps between the structure and the flange, between the flange and the flange, between the flange and the panel, and between the panel and the panel using underwater epoxy to ensure sealing.

<Hose connection and drainage step>

When the sealing step is completed, the hose 800 connected to the water surface is connected to the on-off valve 130 installed on the lower flange to become the inlet 700, and the hose 800 connected to the water surface is also connected to the on-off valve 130 installed on the upper flange. Connected to the exhaust port 750, and drained using a pump connected to the inlet 700. A process of drying the inside of the panel by spraying dry hot air through the inlet 700 may be further included as needed after the drain is finished.

<Filling material injection step>

After draining or draining and drying, a filler composed of grout or epoxy is injected through the inlet 700, and the air in the space inside the panel flows out through the exhaust port 750, and when the filler starts to be discharged through the exhaust port, the filler material Stop injection and close the inlet and outlet valves. Grout is similar to the conventional mortar manufacturing method in which cement and fine sand are mixed and water is added to knead, but it is preferable to use fine sand to smoothly inject grout through the pipe. Can be used as a filler.

<Hose removal step>

When the filler injection step is completed, the cock of the opening/closing valve 130 is closed and the hose 800 is removed.

The repair/reinforcement method of the underwater structure of the present invention constructed as described above is chemically stable after construction, and durability is supplemented to maintain safety from natural disasters such as earthquakes, and shortens construction period and reduces construction costs because it does not require water barrier construction. It works.

100: Flange A 110: Flange B
120: coupling plate 130: on-off valve
150: connection part 170: fastening bolt
190: fastening nut 200: guide rail
220: flange coupling part 230: spacing adjusting protrusion
240: two-way spaced protrusion 245: one-way spaced protrusion
250: anchor bolt insertion hole 270: wire insertion hole
300: anchor bolt 400: horizontal connection wire
600: Panel A 610: Valve insertion hole
620: Panel B 650: Stepped joint
670: fastening protrusion 690: fastening hole
700: inlet 750: exhaust port
800: hose 900: damaged underwater structure
900a: damaged area

Claims (5)

Washing and measuring the standard of the repair/reinforcement part of the damaged underwater structure 900;
A component manufacturing step of manufacturing the flanges 100 and 110, the guide rail 200, the horizontal connection wire 400 and the panels 600 and 620 according to the measured standards;
An on/off valve attaching step of attaching the on/off valve 130 to the flange A 100;
A flange attachment step of attaching the upper flanges 110 and 120 and the lower flanges 110 and 120 to the upper and lower parts of the underwater structure repair/reinforcement area;
A plurality of guide rails 200 having flange coupling parts 220 formed at both ends and one or more wire insertion holes 270 and anchor bolt insertion holes 250 formed on the side of the body are inserted between the upper flange and the lower flange. A guide rail installation step of fixing to an underwater structure with anchor bolts 300;
A transverse connection wire installation step of inserting the transverse connection wire 400 into the transverse connection wire 400 insertion groove formed in the guide rail 200 and winding the transverse connection wire 400 around the underwater structure from the bottom to the top;
Panel attachment step of installing panels (600, 620) on both ends of the upper and lower flanges (100, 110) and fastening them with fastening bolts (170);
A sealing step of applying an epoxy sealing agent to the joints of the underwater structure, the flanges 100 and 110 and the panels 600 and 620 to seal them;
A hose connection step of connecting the hose 800 for the inlet 700 and the exhaust port 750 to the shut-off valve 130 of the lower flange A and the shut-off valve of the upper flange A;
a drainage step of introducing air into the panel through the exhaust port 750 and draining water inside the panel through the inlet 700;
a filler injection step of injecting a filler made of grout or epoxy through the injection port 700 while discharging air inside the panel through the exhaust port 750; and
A hose removal step of closing the valves of the inlet 700 and the exhaust port 750 and removing the hose 800; is configured to include,
The flange is made of stainless or zinc steel and includes a flange A (100) to which an on/off valve 130 is attached and one or more flanges B (110) without an on/off valve 130, the flange A (100) and the flange B (110) is a form in which the edges of the optical beam extending in an arc are connected by a connecting portion 150, and a coupling plate 120 having bolt holes formed at both ends is attached to the flange A (100) and the flange B (110) are fastened bolts ( A method for repairing and reinforcing an underwater structure, characterized in that it is configured to be fastened by 170). According to claim 1,
The guide rail 200 is a bar made of composite fibers, and a flange coupling part 220 extending in the front and rear directions on the upper and lower parts of the bar, and a plurality of two-way spacing protrusions protruding in the front and rear directions between the upper and lower flange coupling parts 220. 240, a plurality of one-way spacing protrusions 245 protruding in one direction between the bi-directional spacing protrusions 240, anchor bolt insertion holes 250 penetrating the bi-directional spacing protrusions 240, upper and lower flange coupling parts 220 A method for repairing and reinforcing an underwater structure, characterized in that it comprises a plurality of connecting bar insertion holes penetrated sideways in between. delete According to claim 1,
The panel includes a panel A 600 made of a composite fiber material having a valve insertion hole 610 and one or more panels B 620 without a valve insertion hole, and the panel A 600 and the panel B 620 are flat Or, it is made of an arc-shaped plate, and a stepped coupling portion 650 is formed with a predetermined width at both ends and the inner or outer thickness is reduced by half to form a step, and the fastening hole is formed on the inside or outside of the stepped coupling portion 650 ( A repair/reinforcement method for an underwater structure, characterized in that the fastening protrusion 670 on which 690) is formed protrudes vertically and is coupled by the fastening bolt 170. According to claim 1,
The guide rail 200 and the panels 600 and 620 are made of composite fibers, and 70% by weight of glass fibers or ceramic fibers are placed in a mold mold at room temperature and 30% by weight of liquid epoxy or polyester are added to the composite fibers. After impregnation, it is produced by pressing with a weight of 5 to 10 tons per m2 using a press and compressing for 20 to 30 minutes, and the composite fiber used for the transverse connecting wire 400 is 70% by weight of glass fiber or ceramic fiber and liquid epoxy or A method for repairing and reinforcing an underwater structure, characterized in that it is produced by extruding 30% by weight of polyester into an extruder and heating it at a temperature of 150 to 180 ° C.

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