KR101138719B1 - A structure and method of bridge pier mould construction repair - Google Patents

Abstract

The present invention relates to a structure for repairing a foundation well and a method for repairing a foundation well using the same, having a buried fixing part fixed to the ground in the water and minimizing underwater work and greatly improving the economics and workability. The foundation well repairing structure includes an FRP frame formed of an inner steel and an outer FRP surrounding the inner steel, and spaced apart at a predetermined interval from the foundation well; It is installed on the lower surface of the FRP frame, having an attachment formed in the downward direction buried fixed portion which is entered into the ground; includes.

Description

STRUCTURE AND METHOD OF BRIDGE PIER MOULD CONSTRUCTION REPAIR}

The present invention relates to a structure for repairing a foundation well bucket and a method for repairing a foundation well, and more particularly, a foundation having a buried fixing part which is fixed to the ground in water and minimizes underwater work and greatly improves economics and workability. It relates to a structure for repairing a well and a method for repairing a basic well using the same.

In the process of building a bridge, a method of making a bridge using a well filling method using a well is used to make a bridge.

In general, the type of wells used in the well filling method is to use a sheet metal formwork. In other words, the basic well formwork formwork is divided into inner sheet metal formwork and outer sheet metal formwork to be made of metal iron plate, and it is functioned as a tension member by maintaining an angle between the inner sheet metal formwork and the outer sheet metal formwork and maintaining a constant interval. Designed to withstand

In case of pier construction by the well filling method, the inner sheet metal form is completely buried in concrete because the bridge structure is made by filling concrete between the inner and outer sheet metal formwork.

In the case of using a metal sheet formwork, the external steel sheet form is oxidized little by little (about 0.9 mm) in water every year, and the thickness erosion phenomenon becomes intensified, and there is a disadvantage of accelerating concrete corrosion over time. Particularly, in the water source water, these formwork forms an oxidizing effect, releasing a large amount of harmful substances containing iron, becoming a pollution source of the water source, and as the corrosion progresses, the strength of the pier structure gradually decreases, reducing the safety of the pier. have.

Therefore, if the degradation of the safety due to immersion or scour of the structure due to oxidation or concrete corrosion is found, the underwater structure is repaired. In general, the repair method for bridge foundation underwater structures has been dependent on steel sheet formwork and underwater concrete pouring.

Specifically, in the case of the bridge foundation well, in the initial construction stage, it is used to form the filled concrete using the iron formwork and to make the structure through the curing process. It is being repaired by placing iron plate formwork and placing underwater concrete again.

The dry work method and the underwater work method are used to repair the foundation wells and underwater structures made using the sheet metal formwork. Both work methods install the sheet metal formwork, sheet pile, or cladding to cure concrete. After the work is finished, there is a problem in that the iron sheet formwork, sheet pile or temporary barriers have to be dismantled.

Therefore, the inventors of the present invention have developed and patented a basic well bucket repair method using an FRP mold that is integrated with the foundation well without removing after curing of concrete in order to overcome the disadvantage of the repair method using such a sheet metal formwork.

However, even in the case of the repairing method using the FRP frame, the gabion is placed around the FRP frame in order to restrain the floating force after the FRP frame is lowered and the water work around the foundation well before lowering the assembled FRP frame on the ship. There was a hassle required to install underwater work and so on.

The technical problem to be solved by the present invention is to have a buried fixed portion fixed to the ground in the water to minimize the underwater work such as ground stop work for the FRP frame lowering and gabion installation work for suppressing the flotation force significantly economical and construction The present invention provides an improved foundation well repairing structure and a basic well repairing method using the same.

Basic well bucket repair structure according to the present invention for achieving the above-described technical problem, the inner steel and the outer FRP surrounding the inner steel material, FRP frame surrounding the base well spaced at a predetermined interval; It is installed on the lower surface of the FRP frame, having an attachment formed in the downward direction buried fixed portion which is entered into the ground; includes.

In the present invention, the FRP mold is preferably composed of a plurality of parts to be flanged, it is preferable to complete the structure through a simple assembly work on the ship.

In addition, the buried fixed portion, the inside is empty, the frame portion having a cross-sectional shape of the width decreases from the upper side to the lower side; and the RF outer skin portion surrounding the outer surface of the frame portion preferably.

In addition, the FRP outer skin portion is attached to the outer surface of the frame portion, the first laminated FRP fixed to the surface of the frame portion by a plurality of anchor bolts; It is preferable that the secondary laminated F-Al stacked on the surface of the primary laminated F-Al can be effectively prevented from corrosion of the frame portion provided in water.

In the FRP mold of the present invention, a driving space portion which is open from the upper side to the lower side and can hit the embedding fixing portion from the upper side is further formed, so that the embedding fixing portion can be easily fixed on the ground on a work line. desirable.

Meanwhile, the method of repairing a basin well according to the present invention is

1) removing and cleaning the corroded portion of the foundation well;

2) assembling the FRP mold and embedding fixing portion surrounding the foundation well in the ship platform;

3) lowering the FRP mold and the buried fixing part below the water so as to contact the lower part of the buried fixing part with the ground while covering the foundation well;

4) embedding and fixing part or all of the buried fixing part on the ground by driving the buried fixing part in the shipboard;

5) placing and curing concrete between the foundation well and the FRP mold.

And in the present invention, after the completion of step 4), it is preferable that the step of filling by filling the in-separated underwater concrete in the buried fixing portion is further proceeded.

In addition, the step 5) includes the steps of: a) placing and curing undetached underwater concrete at a predetermined height in a lower portion of the space between the foundation well and the FRP mold; b) discharging water in the FRP mold; And c) placing and curing general concrete in the FRP mold.

The basic well bucket repair structure of the present invention and the basic well bucket repair method using the same minimize the underwater work mobilizing divers, and almost all the work is performed on the work barge, there is an effect that the economic efficiency and construction is greatly improved.

In addition, there is an advantage that the foundation well of the bridge is not damaged by the flow of strong rivers by the buried fixing part which is entered at a depth of 50 cm or more in the ground even after the repair work is completed.

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

First, a structure for repairing a basic well bucket according to the present embodiment will be described. Basic well bucket repair structure according to this embodiment is configured to include the FRP frame 100 and the buried fixing part 200. The FRP mold 100 is a component that wraps the base well at a predetermined interval from the outside in the process of repairing the base well. The FRP mold 100 is composed of an inner steel 110 entangled with a plurality of steel and an outer FRP 120 surrounding the inner steel 110.

Here, the internal steel 110 is a horizontal angle steel pipe 121, a vertical angle steel pipe 122, a horizontal angle 124, a vertical angle 123, a square angle 125, flat iron, as shown in FIG. 126 and the like are connected to each other and combined to form a circular steel barrel. The internal steel 120 is combined with the concrete when the repair work of the foundation well is completed, and serves as a reinforcement inside the concrete.

In addition, as illustrated in FIGS. 1 and 2, the outer FRP 110 is formed on a surface of the inner steel 120. The external FRP 110 is made of FRP material and has a waterproof function to prevent moisture from penetrating into the interior in a state in which the completion of repairing the base well is completed, and also prevents the internal concrete and steel from being oxidized by water. Therefore, repairing the foundation well using the foundation well repair structure according to the present embodiment has the advantage that the inner steel 120 or concrete is not exposed to the outside has a semi-permanent life.

Meanwhile, as shown in FIG. 1, the FRP mold 100 may be made of a plurality of parts, and then may have a structure forming one FRP mold by combining each part. The FRP mold 100 should be assembled in the field to wrap the foundation well in the process of repairing the foundation well, and if it is made of a plurality of parts, it is possible to assemble the FRP mold in a short time by connecting them to each other by a simple operation on board. There is an advantage that the workability can be improved.

Next, the buried fixing part 200 is a characteristic part of the foundation well repair structure according to the present embodiment, is installed on the lower surface of the FRP mold 100, has an attachment formed in the lower direction on the ground It is a component to be joined. That is, the buried fixing part 200 in the process of repairing the base well serves to firmly fix the ground to the ground well is installed to repair the FRP mold 100. It is preferable that this embedding fixed part is about 50-100 cm in upper and lower length.

To this end, the buried fixing part 200 is installed on the lower surface of the FRP mold 100, as shown in Figs. 1 and 2, the width of the cross section becomes narrower toward the lower side. At this time, the cross-sectional shape of the buried fixing portion 200 may have a shape in which the lower attachment is biased outward so as to match the extension line of the external FRP 110 as shown in FIG. 2, and the lower attachment is inward. It may have a biased shape or a shape in which the attachment is centered. The reason for having such an attachment is to be easily buried in the ground by driving the buried fixing part 200 from the upper side.

Specifically, the buried fixing part 200 may be configured to include a frame part 210 and the FLP outer skin part 220 as shown in FIGS. 2 and 3. The frame portion 210 is formed of a hollow metal plate, and has a cross-sectional shape that becomes smaller in width from the upper side to the lower side. The frame portion 210 is firmly coupled to a lower surface of the inner steel 120 by welding or the like.

In addition, the FLP outer skin part 220 is a component surrounding the outer surface of the frame part 210 as shown in FIG. 3, and the metal material in the process of embedding the buried fixing part 200 on the ground Preventing the frame portion 210 is exposed to the outside to be oxidized by water or the like.

In detail, the FLP outer skin part 220 may be configured as a first laminated FLP 222 and a second laminated FLP 224 as shown in FIG. 3. Firstly, the first stacked FLP 222 is attached to the outer surface of the frame part 210 and is a FLP film fixed to the surface of the frame part 210 by a plurality of anchor bolts 226. The primary laminated FRP 222 is fixed to the frame portion 210 by a plurality of anchor bolts 226 to increase adhesion between the frame portion 210 and the FRP made of a metal material. In addition, the second stacked FRP 224 is formed by being laminated on the outer surface of the first stacked FRP 222, and wrapping the first stacked FRP 222 once more, the frame part 210 and the anchor bolt. The exposure of 226 is certainly prevented.

In addition, the FRP mold 100 is preferably provided with a driving space that is open from the upper side to the lower direction to drive the buried fixing part 200 from the upper side.

Hereinafter, a method of repairing a basic well bucket according to the present embodiment will be described in detail.

First, as shown in Figure 4, the step of removing and cleaning the corroded portion of the basal well 10 is in progress. In this step, the diver 20 proceeds with the removal and cleaning operations for the corrosion portion 12 formed in the water. In the method of repairing the basic well bucket according to the present embodiment, the only underwater operation is performed.

Next, as shown in Figure 5, the step of installing the support structure 400 for assembling and descending the basic well bucket repair structure according to the present embodiment is in progress. In this step, as shown in Figure 5, by using the barge 50, the support for being able to suspend and descend the structure for repairing the foundation well on the upper surface exposed without submerging in the water in the foundation well 10 to be repaired Install the structure 400.

Next, as shown in Figure 6, the step of assembling the structure for repairing the base well. In this step, after transporting the parts of the FRP mold 100 and the parts of the buried fixing part 200 manufactured using the barge 50, etc., the assembly is assembled to wrap the foundation well 10 to be repaired. . In this state, the foundation well repairing structures 100 and 200 are assembled in a suspended state as shown in FIG. 6.

Next, a step of lowering the assembled base well repair structure 100 and 200 so that the buried fixing part 200 is in contact with the underwater ground 30 is performed. In this step, using the pulleys and the like of the support structure 400 is slowly lowered the foundation well repair structure (100, 200), and after the completion of the structure is completed, the support structure for the convenience of subsequent work Remove 400.

Next, as shown in FIG. 7, the step of completely embedding the buried fixing part 200 in the underwater ground 30 is driven by driving the buried fixing portion 200 lowered to contact the underwater ground 30. Proceed. In detail, in this step, the buried fixing part 200 is driven from the upper side to the lower side by using the driving equipment 60 loaded on the barge 50. At this time, you can drive while moving a number of points, you can also drive a number of points at the same time.

Next, as shown in FIG. 8, the step of placing and curing the concrete 500 between the foundation well 10 and the FRP mold 100 is performed on a work platform such as a barge 50. This step may be specifically divided into sub-steps in detail. First, a step of filling and filling in-separated underwater concrete in the buried fixing part 200 may be performed. Since the interior of the buried fixing part 200 is empty, the concrete is filled and cured to secure physical strength and weight. In this case, since the water inside the FRP mold 100 is not removed, it is preferable to use incomparable underwater concrete that can be cured even in water. Then, in the lower part of the space between the foundation well (10) and the FRP mold (100), the step of pouring and curing the concrete in a certain height proceeds. This step may be made in succession with the step of pouring indestructible underwater concrete inside the buried fixing part 200 described above.

Next, the step of discharging the water in the FRP mold 100 is carried out in the state where the undisintegrated underwater concrete is cured. And when the concrete is poured and cured in the FRP mold 100 in a state where the water is completely removed, the repair work for the foundation well 10 is completed.

1 is a partial cutaway perspective view showing the structure of a structure for repairing a foundation well according to an embodiment of the present invention.

Figure 2 is a partial cross-sectional view showing the structure of the structure for repairing the foundation well according to an embodiment of the present invention.

3 is a partial cross-sectional view of the buried fixing part according to an embodiment of the present invention.

4 to 8 are process charts showing each process of the method for repairing a basic well bucket according to an embodiment of the present invention.

Claims (8)

An FRP frame formed of an inner steel material and an outer FRP that surrounds the inner steel material and surrounding the foundation wells at a predetermined interval; It is installed on the lower surface of the FRP frame, having an attachment formed in the downward direction buried fixed portion which is entered into the ground; includes, The embedding fixing part, An empty state and a frame portion having a cross-sectional shape in which a width decreases from an upper side to a lower side; Foundation structure for repairing a well, including; F-LP outer skin surrounding the outer surface of the frame portion. The method of claim 1, wherein the FRP framework, Structure for repairing the foundation well, characterized in that consisting of a plurality of parts coupled to the flange. delete According to claim 1, wherein the RF skin portion, A first laminated FRP attached to an outer surface of the frame part and fixed to a surface of the frame part by a plurality of anchor bolts; Structure for repairing the foundation well, including; secondary laminated FLP stacked on the surface of the first laminated FLP. The method of claim 1, wherein the FRP framework, A structure for repairing a foundation well according to claim 1, further comprising a driving space that is open from the upper side to the lower side to drive the buried fixing part from the upper side. 1) removing and cleaning the corroded portion of the foundation well; 2) assembling the FRP mold and embedding fixing portion surrounding the foundation well in the ship platform; 3) lowering the FRP mold and the buried fixing part below the water so as to contact the lower part of the buried fixing part with the ground while covering the foundation well; 4) embedding and fixing part or all of the buried fixing part on the ground by driving the buried fixing part in the shipboard; 5) placing and curing concrete between the foundation well and the FRP mold; After completing step 4), Method for repairing the foundation well, characterized in that the further step of filling by filling the inseparable underwater concrete in the buried fixed portion. delete The method of claim 6, wherein step 5) a) placing and curing undecomposed underwater concrete at a predetermined height in a lower portion of the space between the foundation well and the FRP mold; b) discharging water in the FRP mold; c) pouring and curing general concrete in the frame of the FRP.

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