KR20150031089A - A structure and method of underwater construction repair - Google Patents

A structure and method of underwater construction repair Download PDF

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Publication number
KR20150031089A
KR20150031089A KR20130110610A KR20130110610A KR20150031089A KR 20150031089 A KR20150031089 A KR 20150031089A KR 20130110610 A KR20130110610 A KR 20130110610A KR 20130110610 A KR20130110610 A KR 20130110610A KR 20150031089 A KR20150031089 A KR 20150031089A
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KR
South Korea
Prior art keywords
frp
reinforcing
frame
pipe
wall plate
Prior art date
Application number
KR20130110610A
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Korean (ko)
Inventor
남궁락
Original Assignee
주식회사 준별에프알피산업
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 주식회사 준별에프알피산업 filed Critical 주식회사 준별에프알피산업
Priority to KR20130110610A priority Critical patent/KR20150031089A/en
Publication of KR20150031089A publication Critical patent/KR20150031089A/en

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/02—Piers; Abutments ; Protecting same against drifting ice
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/52—Submerged foundations, i.e. submerged in open water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D37/00—Repair of damaged foundations or foundation structures

Abstract

The present invention relates to a structure body for reinforcing an underwater construction structure and a reinforcing method which has a structure to observe the inner condition of a concrete structure installed by a reinforcement work when reinforcing the underwater construction structure by using the structure body for reinforcement. According to the present invention, the structure body for reinforcing an underwater construction structure comprises: a FRP frame separately installed from the underwater construction structure at regular intervals, and covering the underwater construction structure; and an inside checking portion fixedly installed inside the FRP frame, and providing a space to check a state of the concrete structure which is filled between the FRP frame and a corrected construction structure.

Description

TECHNICAL FIELD [0001] The present invention relates to a structure for reinforcing an underwater installation structure,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure and a reinforcing method for reinforcing a water-mounted structure, and more particularly, to a reinforcing structure capable of observing a state of a concrete structure installed by a reinforcing operation To a structure for reinforcing an underwater installation structure and a reinforcement method.

There is a known method of making bridge piers by using a paddle filling method using a paddle to construct a pier in the process of extending a bridge.

Generally, the shape of the pail used in the pail filling method is to use a steel plate form. That is, the basic right and left water mold formwork is divided into an inner steel formwork and an outer steel formwork to form a metal steel plate, and an angle is provided between the inner steel formwork and the outer steel formwork to function as a tensile material. .

In case of constructing bridge pier by filler filling method, inner iron plate form is completely buried in concrete because it pierces concrete between inner plate form and outer form plate form.

When metal plate formwork is used, the outer plate form is oxidized little by little (approximately 0.9 mm or so) in the water every year, and the thickness thinning phenomenon is intensified and the corrosion of concrete is accelerated according to the elapse of time. In particular, in the water source waters, such iron plate forms an oxidizing action and discharges a large amount of harmful substances containing iron, thereby becoming a source of pollution in the water source. Further, the strength of the pier structure is gradually weakened due to the progress of corrosion, have.

Therefore, if the oxidation phenomenon or the corrosion of the structure caused by the corrosion of the structure is detected, the underwater structure is reinforced. As shown in FIG. 1, the reinforcing method for a bridge underwater structure generally includes a step of forming a repair structure 20 on an outer surface of a portion of the water reservoir 10 exposed above the water surface, And the like.

However, since the conventional repair structure 20 is installed on the surface of the water in which the water reservoir 10 is installed, as time elapses, due to the erosion by the flow of water, the soil 30 The repair structure 20 itself is in a state of being suspended from the water reservoir 10 as shown in FIG. Accordingly, there is a problem that the repairing structural body 20 adversely affects the safety of the pail 10 and the safety of the pier by increasing the load burden on the pail 10. (Reference numeral 50 is water and 40 is rock).

In order to solve these problems, a method of reinforcing the underwater installation structure is also developed by forming the form using the FRP special frame and placing the cone in the inside thereof. In this case, the FRP special frame is not removed unlike other formwork after concrete hardening, but it is used as it is installed on the outer side of cone structure to protect the cone structure safely.

However, since the FRP special frame is an opaque material, there is a problem that the state of the concrete structure inside the FRP special frame can not be observed. That is, it is difficult to visually confirm deterioration of the concrete structure inside the FRP special frame, whether cracks have occurred, or the like, as the use period elapses.

The object of the present invention is to provide a structure for reinforcing an underwater installation structure and a reinforcement method having a structure capable of observing the inner state of a concrete structure installed by a reinforcement operation while a reinforcement structure is reinforced by using a reinforcement structure .

According to an aspect of the present invention, there is provided a structure for reinforcing an underwater installation structure, the structure comprising: an FRP frame installed at a predetermined distance from the underwater installation structure and surrounding the underwater installation structure; And an internal check part fixedly installed inside the FRP frame to provide a space for checking the state of the concrete structure filled between the FRP frame and the modified installation structure.

In the present invention, the FRP frame may include an FRP wall plate portion formed of an FRP plate and an angular steel pipe fixed to the FRP plate, the FRP wall plate portion forming an outer surface of the FRP frame; A plurality of steel reinforcing parts provided in a space between the FRP wall part and the underwater mounting structure at a predetermined distance from the FRP wall part to reinforce the FRP frame; And a connection part connecting and fixing one side of the plurality of steel reinforcement parts.

In addition, the FRP wall plate part may be formed of a plurality of FRP wall plate parts having a cylindrical shape, a cylindrical shape or a rectangular tube shape in an assembled state.

It is preferable that the FRP wall plate part further includes a fastening part formed by bending the corner of the FRP plate inward and fastened by the fastening member to the adjacent FRP wall plate part.

In the present invention, the internal check unit may include a plurality of steel reinforcing parts, which are installed in the FRP wall part in a space between the plurality of reinforcing steel parts, And a through-pipe fixing part fixing the camera through pipe to the FRP wall part.

Further, in the present invention, it is preferable that the upper end of the camera passage pipe is installed higher than the upper end of the upper FRP wall plate portion.

Also, in the present invention, it is preferable that the camera through pipe comprises an acrylic pipe.

It is preferable that a plurality of the internal identifiers are spaced apart from each other by a predetermined distance.

According to the present invention, the underwater installation structure is structurally reinforced by the reinforcing structure of the present invention, and the specific reinforcing effect that the structural reinforcement is continued unchanged after the lapse of time after the construction is generated. Further, There is an advantage that the condition of the concrete structure inside the part can be easily confirmed.

Fig. 1 is a view showing a conventional water tank reinforcement method.
2 is a plan view showing a construction state of a structure for reinforcing an underwater installation structure according to an embodiment of the present invention.
3 is a perspective view showing a structure of an FRP wall plate portion and an internal check portion according to an embodiment of the present invention.
4 is a perspective view showing a construction state of a structure for reinforcing an underwater installation structure according to an embodiment of the present invention.
5 to 8 are views showing a method of constructing a structure for reinforcing an underwater installation structure according to an embodiment of the present invention.
FIG. 9 is a partial cross-sectional view showing the use state of the internal checking unit according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the structure 100 for reinforcing an underwater installation structure according to the present embodiment includes an FRP frame 110 and an internal check unit 150.

First, the FRP frame 110 is installed at a predetermined distance from the underwater installation structure 10 and encloses the underwater installation structure 10 from the outside. 3, the FRP frame 110 includes the FRP wall plate portion 130 and the steel reinforcing portion 140. [

As shown in FIG. 4, the FRP wall plate part 130 has an overall shape of the FRP frame 110, and the outer surface of the FRP frame 110, which is generally cylindrical, elliptical, . ≪ / RTI > Specifically, the FRP wall plate portion 130 includes a FRP plate 132 and a rectangular steel pipe 134 fixed to the FRP plate 132. The rectangular steel pipe 134 is integrally joined and fixed to the FRP plate 132 by FRP coating. Therefore, the FRP wall plate 130 has a very strong strength by the rectangular steel pipe 134 and has an advantage of being able to withstand side pressure.

3 and 4, in the present embodiment, the FRP wall plate part 130 includes a plurality of FRP wall plate parts in the form of a cylinder, an ellipse, So that it is preferable.

It is very difficult and almost impossible to manufacture the reinforcement structure 100 having the structure as shown in FIG. 3 at an external factory and to move it to a site where an underwater installation structure is installed. Therefore, in the present embodiment, the FRP wall part 130 is manufactured by dividing the FRP wall part 130 into a plurality of parts, and the FRP wall part 130 is moved to the site and assembled in the field to complete the shape of a cylinder, an ellipse and a rectangular tube.

3, the FRP panel part is formed in a structure having a bent part 136 in which the edge of the FRP plate is folded inward, and the bent part 136 is formed as a part of a neighboring FRP panel part And the bent bent portions are fastened to each other by fastening members. The FRP wall plate part 130 is completed when the FRP wall plate parts are connected to each other and coated with the FRP.

Next, the steel reinforcing part 140 is installed in a space between the FRP wall part 130 and the underwater installation structure 10 at a predetermined distance from the FRP wall part 130, Reinforcing the FRP frame 110 and the reinforcing structure 100. After the reinforcing structure 100 is completed, the steel reinforcing part 140 acts as a tensile material between the FRP wall part 130 and the underwater installation structure 10 in a state where the concrete is also laid.

Specifically, a plurality of the steel reinforcing parts 140 are spaced apart from each other by a predetermined distance, and have a lattice structure or the like as shown in FIG. 3 so as to have sufficient strength and structural stability. One side of the steel reinforcing part 140 is firmly coupled to the square steel pipe 134 by welding or bolting. The other side of the steel reinforcing part 140 is firmly coupled to the side surface of the underwater installation structure 10.

3, the internal check unit 150 is fixed to the inside of the FRP frame 110 and includes a concrete structure to be filled between the FRP frame 110 and the quartz- (190). Therefore, the internal check unit is made of a transparent material so that the concrete structure adjacent to the internal check unit can be observed and confirmed by using the naked eye or a camera.

Specifically, in the present embodiment, the internal checking unit may include a camera passing pipe 152 and a passing pipe fixing unit 154, as shown in FIG. 2 and 3, the camera passing pipe 152 is vertically fixedly installed on the FRP wall part 130 in a space between the plurality of steel reinforcing parts 140, It is preferable that a through hole is formed in the vertical direction inside and a transparent material such as an acrylic material is used.

When the length of the camera passing pipe is short, as shown in FIG. 3, a plurality of camera passing pipes may be used extending in the longitudinal direction. 4, the upper end of the camera passing pipe is higher than the upper end of the FRP wall plate, and the upper end of the camera passing pipe is higher than the upper end of the concrete structure and the FRP wall plate upper end It is preferable to have a structure in which it is projected and exposed.

As shown in FIG. 3, the passing pipe fixing part is a component for fixing the camera passing pipe to the FRP wall part. The pass pipe fixing part may have various structures for fixing the camera passing pipe, for example, as shown in FIG. 3, and may have a ring shape surrounding the camera passing pipe.

3 and 4, in the present embodiment, as shown in FIGS. 3 and 4, a plurality of spaced-apart internal identifiers may be installed in a single underwater structure-reinforcing structure to monitor and verify various portions of the concrete structure desirable.

9, the internal check unit installed as described above allows the camera 70 to enter into the camera through pipe 152 and confirm the internal state of the concrete structure, as shown in FIG. 9, with the structure for supporting the underwater installation structure being completed do.

Hereinafter, a reinforcing method for reinforcing an underwater installation structure using the structure for reinforcing underwater installation structure according to the present embodiment will be described for each process.

First, the step of removing and cleaning the corroded part of the underwater installation structure 10 is proceeded. In this step, the diver removes the corrosion part formed in the water or performs the removal and cleaning work using the removal device. In the method of reinforcing the basic water well according to the present embodiment, only the underwater work may be performed.

Next, an anchor bolt may be uniformly installed on the surface of the underwater installation structure 10. This step is an optional step, in which a plurality of anchor bolts are installed on the surface of the underwater installation structure. The plurality of anchor bolts thus installed serve to strengthen the coupling between the reinforcing structure and the underwater mounting structure, particularly, the coupling between the underwater mounting structure and the concrete coupling surface of the reinforcing structure in a state where the reinforcing structure is completed.

Next, a step of assembling the FRP wall plate portion 130, which surrounds the underwater installation structure, proceeds in the workbench. In this step, as shown in FIG. 5, the supporting structure 60 installed on the underwater installation structure or a barge or the like is used to place the reinforcing structure 100 on the upper surface of the underwater installation structure, .

Next, a step of forming the FRP frame 110 for assembling the steel reinforcement 140 and the connection part 150 to the FRP wall part 130 is performed. In this step, the steel reinforcing part 140 is first joined to the FRP wall part 130. At this time, the plurality of steel reinforcement parts 140 are installed so that the intervals are uniformly spaced.

Then, the step of fixing the inner check part 150 to the rectangular steel pipe 134 is proceeded. In this step, the camera through pipe 152 is firmly fixed to the rectangular steel pipe 134 by using the passing pipe fixing part 154.

Next, the step of lowering the FRP frame 110 down to the water surface and installing the underwater installation structure 10 in a wrapped state is proceeded. 4, the finished FRP frame 110 is lowered so that the lower surface of the FRP frame 110 touches the ground 30 on which the underwater installation structure 10 is installed.

Next, as shown in FIG. 6, concrete pouring and curing may be performed in a space between the FRP wall plate portion 130 and the underwater mounting structure 10 by a predetermined height. This step is performed selectively. Specifically, the concrete 190a is poured and cured up to about 1/3 of the height of the FRP frame.

Next, as shown in FIG. 7, a step of fixing the fixed pile 120 through the rock portion 40 on the lower side of the floor where the underwater installation structure 100 is installed is proceeded.

Finally, as shown in FIG. 8, the concrete 190 is poured and cured between the underwater installation structure 100 and the FRP frame 110. At this stage, the concrete 190 is fully laid and cured up to the top of the FRP frame 110. In this way, the outer surface of the underwater installation structure 10 is completely reinforced.

100: Structure for reinforcing underwater installation structure according to an embodiment of the present invention
110: FRP frame 120: fixed pile
130: FRP wall plate part 140: steel reinforcing part
150: internal check part 160: pile fixing case
190: Concrete constructions

Claims (8)

An FRP frame installed at a predetermined distance from the underwater installation structure and surrounding the underwater installation structure;
And an internal check part fixed inside the FRP frame and providing a space for checking the state of the concrete structure filled between the FRP frame and the modified installation structure. The FRP frame according to claim 1,
An FRP wall plate portion formed on the FRP plate and the prismatic steel pipe fixed to the FRP plate, the FRP wall plate portion forming an outer surface of the FRP frame;
A plurality of steel reinforcing parts provided in a space between the FRP wall part and the underwater mounting structure at a predetermined distance from the FRP wall part to reinforce the FRP frame;
And a connection part for connecting and fixing one side of the plurality of steel reinforcement parts. The FRP wall plate according to claim 2,
And a plurality of FRP wall plate parts formed in a cylindrical shape, a cylindrical shape or a rectangular tube shape in an assembled state. 4. The FRP wallboard component according to claim 3,
Further comprising a fastening part formed by bending the corner of the FRP plate inward and fastened by the fastening member to the adjacent FRP wall plate part. 3. The apparatus according to claim 2,
A camera through pipe which is installed in a space between the plurality of steel reinforcing parts in such a manner as to be vertically fixed and fixed to the FRP wall plate part and has a through hole formed in the inside thereof in a vertical direction and made of a transparent material;
And a through-pipe fixing part for fixing the camera through pipe to the FRP wall part. 6. The camera according to claim 5,
And the upper part is installed higher than the upper end of the upper FRP wall part. 6. The camera according to claim 5,
Wherein the reinforcing structure is made of an acrylic pipe. 3. The apparatus according to claim 2,
A structure for reinforcing an underwater installation structure in which a plurality of portions are spaced apart from each other by a predetermined distance.
KR20130110610A 2013-09-13 2013-09-13 A structure and method of underwater construction repair KR20150031089A (en)

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KR20130110610A KR20150031089A (en) 2013-09-13 2013-09-13 A structure and method of underwater construction repair

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KR20130110610A KR20150031089A (en) 2013-09-13 2013-09-13 A structure and method of underwater construction repair

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108560431A (en) * 2018-05-02 2018-09-21 东南大学 One kind being directed to Testing of A Curved Continuous Box Girder Bridge lateral displacement Treatment Methods
CN111501533A (en) * 2020-04-29 2020-08-07 合肥工业大学 Method for enhancing anti-collision performance of concrete-filled steel tube pier by sticking FRP cloth

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108560431A (en) * 2018-05-02 2018-09-21 东南大学 One kind being directed to Testing of A Curved Continuous Box Girder Bridge lateral displacement Treatment Methods
CN111501533A (en) * 2020-04-29 2020-08-07 合肥工业大学 Method for enhancing anti-collision performance of concrete-filled steel tube pier by sticking FRP cloth
CN111501533B (en) * 2020-04-29 2022-01-04 合肥工业大学 Method for enhancing anti-collision performance of concrete-filled steel tube pier by sticking FRP cloth

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