KR100394780B1 - A Repair ethod and Repair tructure of Bridge Pier Mould Construction - Google Patents

Abstract

The present invention relates to a repair of a basic water tank using an FRP frame, which can reduce cost, process, and maintenance cost while preventing water quality, marine pollution, and early corrosion of concrete while reducing costs.

The repair method of the present invention comprises the steps of drilling a bed of a basic water column to be repaired on a ship, excavating a rock using an underwater rock drilling rig to lower the FRP frame, A bolt housing is installed at regular intervals on the horizontal and vertical intersections of the FRP frame so as to maintain or support the interval between the FRP frame and the basic right and left water bottles, A step of flanging the FRP frame inward for vertical and horizontal connection of the FRP frame, overlaying the FRP material outside the flange joint surface to waterproof the FRP layer, and lowering the FRP frame on the excavated rock foundation And placing the lower part of the FRP frame on the foundation of the rock excavated through the above step into the non-separating concrete, After the inside of the FRP frame is pushed upwards, the adjusting bolt installed on the inner wall of the FRP frame is adjusted through the bolt housing so that the adjustment bolt touches the bottom of the foundation well. A step of supporting the FRP frame on a basic water tank, and a step of chipping the surface of the basic water tank by the dry method and removing the eroded surface when the FRP frame is supported and installed in the step, Assembling the reinforcing bars for reinforcing the foundation puddle after the chipping on the ground, fixing the reinforcing bar assembly net between the horizontal bolts and nuts for FRP frame brazing, and pouring the concrete by dry method.

The repair structure of the present invention comprises a horizontal trough steel 12 determined according to the shape and circumference of the basic trough 10 and a vertical trough steel 13 for retaining the shape while reinforcing the horizontal trough steel 12 A FRP layer 14 attached to the outside of the frame and a bolt 15 projecting in the direction of the basement well 10 about the intersection of the horizontal groove 12 and the vertical groove 13 of the frame, A housing 15 and an adjusting bolt 11 coupled to the bolt housing 15 and supporting the FRP frame 11 on the basin well 10. As a result, eco-friendly construction, air shortening, and economic efficiency increase.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a repair method and a repair structure for a bridge,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of repairing a basic water reservoir using an FRP frame, and more particularly, to a method of repairing a basic water reservoir by using an FRP It is a repair method to replace the repair method using a frame. It is a repair method to prevent water quality and marine pollution and early corrosion of concrete, but also to reduce the cost, process and maintenance cost of construction. It is about water bottle maintenance.

Generally, in case of constructing a bridge by the filling method of the right pail, the right pail (3) is constructed by using an iron plate form as shown in Fig. The basic water tank formwork used in the construction of the water tank 3 is divided into an inner steel formwork 1 and an outer steel formwork 2 to form a metal steel plate and an inner steel formwork 1 and an outer steel formwork 2 The angle is designed to function as a tensile material at regular intervals and structurally designed to be safe against lateral pressure.

In case of constructing the pier by the filling method, the inner steel form (1) is completely buried in the concrete because the pit structure is made by filling the concrete between the inner steel formwork (1) and the outer steel formwork (2).

When metal plate formwork is used, the outer steel plate form 2 is oxidized little by little (approximately 0.9 mm or so) in the water every year, which causes the thickness thinning phenomenon to be deepened and accelerates the corrosion of concrete 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, And the underwater structure is repaired if the oxidation phenomenon or the corrosion of the structure caused by the corrosion of the concrete deteriorates the safety due to the scouring phenomenon.

The general repair method of the foundation pail has been dependent on iron plate form and underwater concrete piling. That is, in the case of a bridging basin right and left bucket, the concrete is poured using an iron plate form at the initial construction stage, and the structure is made through the curing process. When the damage or cracking of the constructed structure occurs, And re-installing underwater concrete.

The dry working method and the underwater working method are known as working methods for repairing the basic water tank and the underwater structure made using the steel plate form.

As shown in FIG. 2, the dry operation method is as follows. First, an arbitrary fragrance film is installed on the periphery of the basin right basin (S1). After the concrete in the basin right basin is eroded (S2) The concrete is laid around the surrounding area (S3). Then, the steel plate form is newly welded (S5), the concrete is placed and cured (S6), and when the concrete curing is completed, the steel plate form is dismantled (S7) of removing the caustic sludge that has been removed and installed, thereby forming a concrete deposit layer on the corresponding portion and the remaining portion of the damaged basal pail.

As shown in FIG. 3, the underwater working method is to insert a sheet pile around the basin right basin (S1) and remove the water between the basin right basin sheet piles (S2).

After that, the concrete is poured around the basin and the concrete is poured, and the reinforcing steel is placed around the basin (S3).

Then, steel plate formwork is welded around and installed around the foundation water column, and concrete is placed in the steel plate form and cured (S4).

When the concrete curing is finished, the iron plate form is dismantled and the sheet file is pulled out (S5) to finish the repair work.

Since the dry / underwater repair work method has been carried out for a long time by the repair method of the basin and the water bottle, there are many empirical know-hows, so it is easy to apply the construction method and it is advantageous to procure and supply the disposal materials. It is difficult to design and fabricate the steel structure because the steel formwork is oxidized in the water and the concrete corrosion accelerates. It is difficult to design, manufacture and install, the workability is low due to the welding work, and the joints cause cracks or defects Since the steel plate is welded to form a structure, it has many cracks and cracks, and it is difficult to maintain due to the increase in the workload of underwater welding repair work, and it is difficult to maintain the steel plate due to exposure to salt or sea corrosion There was a problem.

As shown in Fig. 4, a method of using the FRP frame includes an inner frame 4 contacting the outer wall of the basic right and left water basin 3, an outer frame 5 spaced from the inner frame 4, There is known a method of repairing a basic water reservoir by stacking a concrete pouring space 6 made by the gap of the pouring space 5 and an FRP frame 8 having an angle 7 structure placed in the pouring space 6 around the basin In the case of the dry / underwater repair method using the FRP frame 8, since the sheet pile is poured around the basic pail 3, the water in the pail is removed, and the FRP pile 8 is installed to pour the concrete, Construction delay and economical efficiency.

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a method of repairing a basin and a water basin for repairing a basin and a basin using a relatively simple method for repairing the basin and basin using the FRP framework.

In order to achieve the above object, the present invention is characterized in that a structure is installed around a basement well, a water passing through a foundation well is removed, and a concrete curing frame is installed outside the basement well, A maintenance method for repairing a basic water tank by forming a new film outside the water tank,

The basin /

A step of excavating the bottom of the basic water reservoir to be repaired,

In this step, the rock is excavated using an underwater rock drilling rig to lower the FRP frame to a predetermined depth when the rock is exposed around the foundation of the foundation pit,

Horizontally and vertically forming a FRP frame by horizontally and vertically attaching vertical and horizontal grooves,

Installing a bolt housing at regular intervals in the horizontal and vertical intersections of the FRP frame so as to maintain or support an interval between the FRP frame and the basic right and left water bottles and installing adjustment bolts in the bolt housings,

The method of claim 1 or 2, wherein the FRP frame is flanged to the vertical and horizontal connection of the FRP frame, the FRP material is overlaid on the flange joint surface to waterproof the FRP layer,

Placing the lower part of the FRP frame as a non-separating concrete when the FRP frame is lowered on the rock foundation excavated,

After the concrete is cured, the water inside the FRP frame is pushed upwards and the adjustment bolts installed on the FRP frame inner wall are adjusted through the bolt housing, so that the adjusting bolts are passed through the foundation wells, Supporting the FRP frame on the basic right and left bucket by the adjusting bolt,

In the above step, when the support and installation work of the FRP frame is completed, chipping the surface of the basal ridge and removing the eroded surface by a dry method,

And assembling the reinforcing bar for reinforcing the foundation pour water tank after the chipping of the foundation pouring water tank surface onto the ground to fix the reinforcing bar assembly net down between the horizontal bolts and nuts for FRP frame brazing and pouring the concrete dry.

According to another aspect of the present invention, there is provided a method of manufacturing a steel plate, comprising the steps of: forming a horizontal groove having a shape determined by a shape and a circumference of a basic right and left water basin;

An FRP layer overlaid on the outside of the frame,

A bolt housing protruding in the direction of the basal right and left water basin about the intersection of the horizontal groove and the vertical groove of the frame,

And an adjusting bolt coupled to the bolt housing and supporting the FRP frame on the basal right and left baskets.

Fig. 1 is a view showing a bridge-based right and left water reservoir

FIG. 2 is a flowchart for explaining a conventional dry /

3 is a flow chart for explaining a conventional basin /

Figure 4 shows a conventional dry repair frame

(a) is a plan view and (b) is a sectional view taken along the line A-A in (a)

FIG. 5 is a schematic view of a structure for repairing a basic right-

6 is a view showing a structure for repairing a basic water reservoir according to the present invention

(a) is a front view (b) is a plan view

FIG. 7 is a flowchart of the maintenance method of the present invention

8 (a) to 8 (f) are explanatory diagrams sequentially illustrating the dry water repair method of the basic water tank according to the present invention

9 (a) to 9 (e) are explanatory diagrams sequentially illustrating the repair method of the basic right-hand water bucket underwater according to the present invention

Description of the Related Art [0002]

10: Basic water tank 11: FRP frame

12: Horizontal groove steel 13: Vertical groove steel

14: FRP layer 15: bolt housing

16: Adjusting bolt 17: Reinforcing assembly net

18: unbonded concrete 19:

20: Corrosive area 21: Concrete (Foundation base)

23: Foundation Base 24: Line Workbench

25: Underwater concrete

Since the FRP frame itself can serve as a sheet file without installing a sheet file, the present invention is advantageous in reducing the construction cost and shortening the construction time.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the application of the method of the present invention, as shown in Figs. 5 and 6, the horizontal grooved steel 12, which is determined according to the shape and the circumference of the basic water tank 10, A FRP layer 14 superimposed on the outside of the frame and a frame 11 composed of a frame made of a foundation water tank 10 And an adjusting bolt 16 which is coupled to the bolt housing 15 and supports the FRP frame 11 in the base water tank 10, use.

In the repair method of the present invention using the FRP frame 11 as described above, a structure including the FRP frame 11 is installed around the maintenance subject basin 10, and the FRP frame 11 7, the bottom of the basic water reservoir 10 to be a maintenance object is excavated and arranged (S10), and the water is removed from the basement water reservoir 10, In step S10, when the rock is exposed around the foundation of the basement well 10, the rock is excavated using an underwater rock excavation equipment to lower the FRP frame 11 to a certain depth (S20).

The FRP frame 11 is manufactured by horizontally attaching the horizontal groove 12 and the vertical groove 13 to the FRP frame 11 to maintain or support the gap between the FRP frame 11 and the basic reservoir 10, The bolt housing 15 is installed at regular intervals in the horizontal and vertical intersections of the FRP frame 10 and the adjustment bolt 16 is installed thereon (S40).

When the adjustment bolt 16 and the bolt housing 15 are installed, the FRP frame 11 is hung on the chain block, flanged inward for vertical and horizontal connection, and overlaid on the FRP layer 14 outside the flange joint surface And the FRP frame 11 is lowered on the rock foundation excavated in the above step (S50).

When the FRP frame 11 is placed on the foundation of the excavated rock through the step S50, the lower part is poured into the unbonded concrete 18 (S60). After the concrete is cured, the water inside the FRP frame 11 is removed, The adjusting bolt 16 provided in the bolt housing 15 provided at the intersection of the horizontal groove 12 and the vertical groove 13 of the FRP frame 11 is adjusted so that the end of the adjusting bolt 16 is inserted into the base- The FRP frame 11 is kept at a predetermined interval between the FRP frame 11 and the basic right and left water reservoir 10 and is also supported by the adjustment bolts 16 in step S70.

When the strut installation work is completed by the adjustment bolt 16, the surface of the basic water tank 10 is chipped by the dry method to remove the corroded surface. After the surface of the basic water tank 10 is chipped, The reinforcing bar assembly 17 is lowered between the adjusting bolt 16 for the FRP frame and the bolt housing 15, and the concrete is laid dry (S80).

In the dry repair method, as shown in FIG. 8, a parchment film 19 is installed along the periphery of the basement well 10 (FIG. 8A), and the corroded corrosion section 20 of the basement well 10 is picked up and removed 8B), the concrete is cemented around the bottom of the basin well 10 and the concrete 21 is poured (Fig. 8C). Thereafter, a concrete curing frame is provided outside the basement well 10, (19) and a corroded portion of the basic water reservoir (10) is completed in the basic water reservoir maintenance method in which a new deposition film is formed outside the water reservoir (10) The FRP frame 11 is installed by flange bonding (see FIG. 8D), and the concrete is placed in the space between the FRP frames 11 (Fig. 8F), and the FRP frame 11 is formed outside the basement well 10 by removing the debris film 19 To form a deposition layer peaceful and complement the basic right bucket.

The FRP frame 11 may be divided into one to four or more pieces according to the diameter and shape of the basic right and left water basins 3 and stacked along the height of the basic right and left basins 10. [

9, after the FRP frame 11 is installed around the basement well 10, the water between the foundation basin 10 and the FRP frame 11 is removed, and a concrete curing frame In which a diaphragm (22) confirms a corrosion site (20) of a basement basin (10) in the water and forms a new deposit on the basement basin (10) A step (FIG. 9A) of forming a base 23 by placing a stone and an underwater concrete around the bottom of the water tank 10,

A step (FIG. 9B) of vertically / horizontally flanging the FRP frame 11 prepared beforehand in the line work table 24 and forming a bottom portion 23 below the base water tank 10 in the water,

When the FRP frame 11 is lowered along the basement well 10 and placed on the foundation 23, about one lot of underwater concrete 25 is laid along the foundation basin 10, 25) the step of excluding water between the FRP frame 11 and the basement well 10 after curing (FIG. 9C),

(FIG. 9D), the operator enters the inside through the space between the basement well 10 and the FRP frame 11 to remove and select the corroded concrete,

When the work of picking and removing the corrosion part 20 of the basic right and left water bottles 10 is completed, the worker returns to the workbench 24 again and pours and cures the concrete between the basic right and left water bottles 10 and the FRP molds 11 (Fig. 9E).

In the case of applying the underwater repair method to the basic water tank repair, it is possible to install the crane work or the line work platform with the basic water tank height is wide and wide, and the water tank is buried in the river bed It is possible to apply to a limited number of bridges. In the case of moderate maintenance of the basin and water bottle maintenance, the structural lightweight aggregate is used to repair it, and it is applied when the underwater operation is possible because the river is not contaminated.

As shown in FIGS. 5 and 6, the FRP frame 11 according to the present invention has a horizontal groove 12 and a horizontal groove 12 determined according to the shape and the circumference of the base 10, (12) and a vertical groove (13), the FRP layer (14) covering the FRP layer (14) outside the frame, and the FRP layer A bolt housing 15 protruded in the direction of the water bottle 10 and an adjusting bolt 16 which is coupled to the bolt housing 15 and supports the FRP frame 11 in the base water tank 10 11). The shape of the FRP frame 11 is advantageously applied to dry repair in an underwater repair method.

That is, the entire FRP frame 11 without the sheet file is fixed to the outer wall of the basement well 10 simply by adjusting the length of the adjustment bolt 16 provided near the intersection of the vertical groove 13 and the horizontal groove 12 It is possible to carry out the repair work of the basic water tank immediately without any other operation such as the installation of the sheet file.

In the case of using the FRP frame 11 of the present invention without discriminating between the dry and underwater repairing methods, the FRP frame 11 can form a circular or elliptical frame according to the construction conditions of the maintenance target basin 10 And the upper and lower or intermediate circular molds can be formed into a multi-stage circular shape or an elliptical mold by only joining the horizontal flanges, so that the repair work can be completed by placing the underwater concrete without restriction on the shape.

The outer wall of the frame composed of the vertical groove 13 and the horizontal groove 12 forms the reinforced plastic FRP layer 14. FRP is a composite structure material of unsaturated polyester resin and glass fiber, It is a reinforced plastic that is lightweight, acid-resistant, heat-resistant and corrosion-resistant and almost permanent. Most of the elements that required corrosion resistance so far have used metallic materials, and the corrosion resistant resin is mainly used as a lining material. Corrosion resistance FRP is far ahead of metal materials, and it has low cost compared to metal materials, good mobility due to installation and weight reduction, low labor cost, no rust problem in water, and requires little maintenance. In addition, it has high degree of freedom in design processing, excellent heat insulation, no ion elution, appearance is in color, it is beautiful, it does not need painting, strong adhesion to base metal such as cement, and excellent durability. The properties of these FRP materials can be very suitable as a structural material for protecting concrete structures or for curing concrete. For example, the problem of rusting and corrosion of concrete, It can be solved simply to the degree of surface treatment with FRP material.

In addition, the FRP material can be easily fixed to the foundation water reservoir, as in the present invention, by simply attaching the FRP material to the foundation water reservoir to repair the foundation water reservoir or form a frame separately, In the case of applying the method and its structure, it is not necessary to construct the sheet pile or the concrete curing structure to support and fix the FRP frame on the foundation pail in the field. Therefore, The maintenance of the bucket can eliminate reinforcement and various defects such as concrete corrosion, flood-induced scouring and rust which will be caused in the future, and it is possible to simplify construction by eliminating the troubles of construction for application of FRP frame, It is advantageous for air shortening.

According to the present invention, in repairing the outer wall of the basic right and left water basin by covering it with the FRP structure, it is possible to repair the basic right and left water bottles by operating only the adjustment bolts in the FRP frame itself, It is possible to improve the workability by reducing the construction process together with the shortening of the air, and to improve the economical efficiency and reliability as much.

Claims (2)

After installing the structure around the foundation water tank, passing water through the structure, removing the water between the structures, installing the concrete curing frame on the outside, and installing new concrete on the outside of the existing foundation water tank to repair the foundation water tank In the repair method, The basin / A step of excavating the bottom of the basic water reservoir to be repaired, In this step, the rock is excavated using an underwater rock drilling rig to lower the FRP frame to a predetermined depth when the rock is exposed around the foundation of the foundation pit, Horizontally and vertically forming a FRP frame by horizontally and vertically attaching vertical and horizontal grooves, Installing a bolt housing at regular intervals in the horizontal and vertical intersections of the FRP frame so as to maintain or support an interval between the FRP frame and the basic right and left water bottles and installing adjustment bolts in the bolt housings, The method of claim 1 or 2, wherein the FRP frame is flanged to the vertical and horizontal connection of the FRP frame, the FRP material is overlaid on the flange joint surface to waterproof the FRP layer, Placing the lower part of the FRP frame as a non-separating concrete when the FRP frame is lowered on the rock foundation excavated, After the concrete is cured, the water inside the FRP frame is pushed upwards and the adjustment bolts installed on the FRP frame inner wall are adjusted through the bolt housing, so that the adjusting bolts are passed through the foundation wells, Supporting the FRP frame on the basic right and left bucket by the adjusting bolt, In the above step, when the support and installation work of the FRP frame is completed, chipping the surface of the basal ridge and removing the eroded surface by a dry method, And assembling the reinforcing bars for reinforcing the foundation water wells after the chipping of the foundation wells on the ground to fix the reinforcing steel assembly net down between the horizontal bolts and nuts for FRP frame brazing and pouring the concrete dry. Water bottle maintenance method. An FRP frame with an angle structure placed in a concrete pouring space formed by the distance between the inner frame and the outer frame, and an FRP frame having an angle placed in the pouring space, In a structure for repairing a bucket, In the above-described basin right water column repairing structure, A horizontal grooved steel 12 determined according to the shape and circumference of the basic right and left water basin 10 and a vertical grooved steel 13 for retaining the shape while reinforcing the horizontal grooved steel 12, An FRP layer 14 superimposed on the outside of the frame, A bolt housing 15 protruding in the direction of the basement well 10 with respect to an intersection of the horizontal groove 12 and the vertical groove 13 of the frame, And an adjustment bolt (11) coupled to the bolt housing (15) and supporting the FRP frame (11) on the basal right water column (10).