KR101327873B1 - Flatness remaining unit fot repairing precast panel of concrete pavement, and repairing method - Google Patents

Abstract

It is possible to improve the workability by securing flatness of the precast panel by using the flatness securing unit when repairing the partial section of concrete pavement, and to shorten the concrete curing time and increase the adhesion force when repairing the partial section of the concrete pavement. A flatness securing unit for repairing a precast panel for concrete pavement and a repair method thereof are provided. Flatness securing unit for repairing precast panels for concrete pavement, Tripod (folding) props; An upper horizontal plate formed on an upper support brace; Fixed plates which are formed at each end of the prop brace to secure the flatness of the precast panel while limiting the height to lift the precast panel; A wire rope coupled with the precast panel to lift the precast panel; And a pulley for winding the wire rope so that the wire rope can lift the precast panel.

Description

Flatness unit for repairing precast panel for concrete pavement and its repair method {FLATNESS REMAINING UNIT FOT REPAIRING PRECAST PANEL OF CONCRETE PAVEMENT, AND REPAIRING METHOD}

The present invention relates to the repair of concrete pavement, and more specifically, a flatness remaining unit for securing flatness of a precast panel when repairing a partial section of a road surface of a damaged part of a concrete pavement. ) And its repair method.

In general, highways or automobile roads are divided into asphalt pavement and concrete pavement. Asphalt pavement road is cheap construction cost and good ride comfort, but the strength is weak, there are many road damage during use, there is a disadvantage that often need to repair work, and concrete pavement is expensive construction cost and ride comfort is slightly lower, while the strength is low It has the advantage of low maintenance cost due to less road damage when used strong. In addition, the concrete road pavement has a closed end that the length is elongated, contracted by heat, the length is changed slightly according to the change of ambient temperature, the road is broken. Recently, a method of repairing a partial section of a damaged part of the concrete pavement has been used.

On the other hand, as a prior art, the Republic of Korea Patent No. 10-406482 discloses the invention named "road paving precast concrete module and road paving method using the same", it will be described with reference to FIG.

1 is a view showing a precast concrete module for road paving according to the prior art.

Referring to Figure 1, the road paving precast concrete module 10 according to the prior art, a precast concrete module that can be paving the road prefabricated, a body of a hexahedral shape made of concrete; A skeletal member 13 built in a predetermined depth from the surface of the body 11; And a longitudinal tensile steel wire insertion hole 14 formed to penetrate in the longitudinal direction of the body 20 so that the tensile steel wire member can be inserted therein.

Here, the skeletal member 13 is composed of a mesh structure entangled with reinforcing bars of a predetermined radius so as to extend in the longitudinal direction of the body 11, the longitudinal tensile steel wire insertion hole 14 is a predetermined material, for example For example, a longitudinal tension wire guide conduit 15 made of PVC guides the sliding of the tension wire inserted into the insertion hole 14.

According to the precast concrete module 10 for paving roads according to the prior art, prefabricated road paving is possible as long as the desired length, the tensile coupling is possible to withstand the shear stress generated in the upper portion according to the use of the road, the winter It can remove or prevent snow and freezing on the road surface.

On the other hand, as another prior art, the Republic of Korea Utility Model Model No. 20-200925 discloses the design of the name "precast panel for repair of concrete packaging", it will be described with reference to FIG.

Figure 2 is a view showing a state of use of the precast panel for repair of concrete pavement according to the prior art, an exploded perspective view for explaining the construction process of the precast panel.

In the precast panel for repairing concrete pavement according to the prior art, as shown in FIG. 2, a perforated iron plate is embedded in the center of the panel P, and fastening bolt holes 21 and 21 ′ are perforated. The concrete pavement can be repaired by curing the concrete in a state in which the corners 22 and 22 'are formed in a semicircular shape and molding the unit panel P according to the standard.

Specifically, in order to repair the road in the event of breakage or cracking of concrete pavement, the damaged part is marked in square shape according to the degree of breakage and cracking, and the existing concrete is collected at the corner of the square with a core extractor and then squared along the marking line. Crush the concrete at the break. At this time, the precast panel corresponding to the size of the damaged part is selected and a predetermined amount of mortar is poured into the bottom of the crushed part 24 of the existing concrete. Then, by seating the panel on its top, the edges 22, 22 'of the panel are correctly inserted into the site broken by the core harvester. Subsequently, when the bolts 23 and 23 'are inserted into and fastened to the bolt holes 21 and 21', respectively, the panel P is repaired and completed, and the road can be used immediately after opening the road.

According to the precast panel for repairing concrete pavement according to the prior art, the precast panel can be standardized to repair the site where breakage and cracking occurred in a short time on site, thereby minimizing the road blocking time, and The quality can be improved and the budget can be reduced by standardization in maintenance and management.

On the other hand, repairing the partial section of a general concrete pavement is performed in the order of removing damaged parts and trimming → cemented concrete laying → pavement flatness manpower closing → curing. In particular, the time required for finishing and curing is It is an absolute time that must be secured as a time for developing strength.

At least 4 hours is required to repair the partial section of concrete pavement currently in use at the public highway maintenance site. For example, it takes 40 minutes to remove and clean up the damaged part, 20 minutes to cast concrete, and 3 hours to cure it. As a result, the traffic blocking time increases, causing frequent traffic delays, congestion, and safety accidents.

In addition, according to the prior art, the finishing treatment time for ensuring the flatness of the concrete pavement and curing time for the strength development is a big constraint in reducing the time in terms of public highway driving safety. In addition, according to the prior art, there is a problem that the durability of the repair section is reduced due to the lack of superhard concrete quality control. For example, according to the prior art, in the case of a super hard mirror, curing for 1 hour with a compressive strength of 8Mpa, or curing for 3 hours with a compressive strength of 29Mpa, it takes at least 3 hours to have a predetermined compressive strength, accordingly There is a problem in that the driving speed decreases due to an increase in traffic blocking time.

1) Republic of Korea Patent No. 10-406482 (application date: July 4, 2001), the name of the invention: "Precast concrete module for road paving and road paving method using the same" 2) Republic of Korea Utility Model Registration No. 20-200925 (Application date: May 18, 2000), Designation name: "Precast panel for repair of concrete packaging" 3) Republic of Korea Patent Publication No. 2011-43026 (published: April 27, 2011), the title of the invention: "Precast concrete panel for road paving" 4) Republic of Korea Patent Publication No. 2008-72318 (published: August 6, 2008), the title of the invention: "Concrete block and concrete paving method"

The technical problem to be solved by the present invention for solving the above-mentioned problems is, precast panel for concrete pavement, which can improve the field construction properties by securing the flatness of the precast panel using a flatness securing unit during partial section repair of concrete pavement It is to provide a flatness ensuring unit for the repair and its repair method.

Another technical problem to be achieved by the present invention is to provide a flatness securing unit for repairing precast panels for concrete pavement and a method of repairing the same, which can shorten the curing time of concrete and increase the adhesive force required when repairing a partial section of concrete pavement. It is for.

As a means for achieving the above-described technical problem, the flatness ensuring unit for repairing the precast panel for concrete pavement according to the present invention, when repairing the damaged section partial section of the concrete pavement using a precast panel, the precast panel A flatness securing unit for ensuring the flatness of the tripod (Tripod) form of the holding prop; An upper horizontal plate formed on the support brace; Fixed plates formed at each end of the support brace to secure the flatness of the precast panel while limiting a height to lift the precast panel; A wire rope coupled to the precast panel to lift the precast panel; And a pulley for winding the wire rope so that the wire rope can lift the precast panel.

Here, in the state in which the pulley lifts the precast panel, a part of the fixing plate may contact the upper surface of the precast panel to ensure flatness of the precast panel.

Here, the precast panel in contact with the fixing plate can ensure the flatness in consideration of the slope of the road surface of the concrete pavement damaged portion.

The flatness securing unit for repairing the precast panel for concrete pavement according to the present invention may further include a fixed plate rotation hinge formed at each end of the support brace so as to allow left and right rotation of the fixed plate.

The flatness securing unit for repairing the precast panel for concrete pavement according to the present invention may further include a spacing chain disposed between the three strut braces so as to maintain a horizontal gap between the strut braces.

As another means for achieving the above-described technical problem, the precast panel repair method for concrete pavement using the flatness ensuring unit according to the present invention, precast for concrete pavement repairing the broken end portion of the concrete pavement using the precast panel A method of repairing a panel, the method comprising: a) cutting a broken road surface to repair a partial section of a concrete pavement; b) arranging the cut damaged road surface and preparing a precast panel manufactured on site; c) mounting the flatness securing unit to the cut damaged road surface; d) checking the flatness between the cut part road surface and the precast panel in a state in which the precast panel is lifted by using a precast pulling pulley of the flatness securing unit; e) fixing the precast panel by injecting grouting material into the cut concrete pavement while maintaining the flatness of the precast panel; f) installing a set anchor on the precast panel to support common load (shear force); And g) curing the partially repaired damaged part road surface and finishing the surface.

Here, the precast panel of step b) is characterized in that the through-hole for injecting the grouting material and the through-hole for fastening so as to be lifted by the flatness ensuring unit is formed.

Here, the precast panel is made of concrete to have a compressive strength of 27Mpa or more by applying one kind of concrete, the precast panel is considered to shrink / expand joints in the size of 50cm × 50cm × 10cm ~ 1m × 1m × 15cm To determine the thickness, it was characterized by curing for 28 days using the formwork.

Here, the flatness securing unit of step c) is in the form of a tripod, the fixed plate (steel plate) of a predetermined size formed at each end of the three strut brace limiting the height to lift the precast panel while precast panel The flatness of can be secured.

Here, the flatness ensuring unit, a tripod-type folding prop brace; An upper horizontal plate formed on the support brace; Fixed plates formed at each end of the support brace to secure the flatness of the precast panel while limiting a height to lift the precast panel; A wire rope coupled to the precast panel to lift the precast panel; And a pulley for winding the wire rope so that the wire rope can lift the precast panel.

Here, when the road surface of the concrete pavement damaged part is inclined, the flatness ensuring unit may secure the flatness of the precast panel in consideration of the inclination of the damaged part road surface.

Here, the grouting material of step e) is cured for 1 hour, and the grouting material is an elastic epoxy grout, characterized in that 25kg ultra-speed mortar, 4.5L of water and 2.5g to 25g of a retarder are formulated on a per package basis. do. In this case, the retardant dose may be determined according to the addition amount determination chart according to the temperature.

Here, after the 20 minutes curing in step g) is characterized in that the flattening unit is removed, the surface is finished.

According to the present invention, the site construction can be improved by securing the flatness of the precast panel using the flatness securing unit when repairing a partial section of the concrete pavement at the highway maintenance site. In other words, it is possible to improve the flatness and durability of the repaired concrete pavement and at the same time reduce the absolute time required for repair.

According to the present invention, it is possible to shorten the concrete curing time and increase the adhesive force required when repairing the partial section of the concrete pavement. For example, when repairing a partial section of a conventional concrete pavement, the traffic blocking time is excessively about 4 hours, but according to the present invention, it can be shortened to about 1 hour. Accordingly, by reducing the traffic blocking time by about 70%, it is possible to improve driving safety, reduce costs, and improve customer satisfaction through securing flatness of concrete pavement.

1 is a view showing a precast concrete module for road paving according to the prior art.
2 is a view showing a state of use of the precast panel for repair of concrete pavement according to the prior art.
Figure 3 is a front view showing a flatness ensuring unit for repairing precast panel for concrete pavement according to an embodiment of the present invention.
Figure 4 is a plan view showing a flatness ensuring unit for repairing precast panel for concrete pavement according to an embodiment of the present invention.
5 is a view illustrating a precast panel for concrete pavement according to an embodiment of the present invention.
6a to 6d are views for explaining in detail the flatness ensuring unit for repairing precast panel for concrete pavement according to an embodiment of the present invention.
7 is a flowchart illustrating a method of repairing a precast panel for concrete pavement using a flatness securing unit according to an exemplary embodiment of the present invention.
8A to 8G are diagrams for explaining in detail each step of the precast panel repair method for concrete pavement using the flatness ensuring unit according to an embodiment of the present invention.
9A to 9H are photographs corresponding to each step of the precast panel repair method for concrete pavement using the flatness securing unit according to the embodiment of the present invention, respectively.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, except to exclude other components unless otherwise stated.

3 is a front view showing a flatness securing unit for repairing a precast panel for concrete pavement according to an embodiment of the present invention, Figure 4 is a plan view showing a flatness securing unit for repairing a precast panel for concrete pavement according to an embodiment of the present invention to be.

3 and 4, the flatness securing unit 100 for repairing a precast panel for concrete pavement according to an embodiment of the present invention is a part of the damaged part 300 of the concrete pavement using the precast panel 200. When repairing the cross section, as a flatness securing unit for securing the flatness of the precast panel 200, the support brace 110, the upper horizontal plate 120, fixed plate (steel plate) 130, fixed plate rotation hinge 140 ), The pulley 150, the precast panel lifting wire rope 160, the spacing chain 170 and the locking ring 180 is configured.

The holding brace 110 is formed in a tripod form by folding, but is not limited thereto. For example, three support braces 110 may be formed, and each of the support braces 110 may have a diameter of 38 mm and a thickness of 2.3 mm.

The upper horizontal plate 120 is formed on the support brace.

Fixing plate (steel plate) 130 is formed at each end of the prop brace 110 to limit the height to lift the precast panel, that is, part of the fixing plate 130 is the portion of the precast panel 200 By contacting with the upper surface, respectively, the flatness of the precast panel is ensured. For example, the fixing plate 130, as shown in Figure 4, is formed of a number (130a, 130b, 130c) corresponding to the prop brace 110, each formed in a size of 200mm × 200mm May be, but is not limited to. Here, reference numeral A denotes a cut surface.

Fixed plate rotation hinge 140 is for adjusting the support angle, it is formed on each end of the support brace 110 to enable the left and right rotation of the fixed plate 130.

Pulley 150 winds up the wire rope so that the wire rope can lift the precast panel. At this time, the pulley 150 may lift up to 240kg.

The wire rope 160 is engaged with the precast panel 200 to lift the precast panel 200.

A spacing chain 170 is disposed between the three strut braces so as to maintain a horizontal gap between the strut braces. For example, the gap maintaining chain 170 may be formed to have a thickness of 10 mm and a length of 0.5 m, but is not limited thereto.

The catching ring 180 is formed at the end of the wire rope 160 and allows the wire rope 160 to lift through the through hole of the precast panel 200.

Accordingly, in the state in which the pulley 150 lifts the precast panel 200, a part of the fixing plate 130 contacts the upper surface of the precast panel 200 to respectively contact the precast panel 200. The flatness of can be secured.

In addition, when the concrete pavement damaged part road surface is inclined, the precast panel 200 in contact with the fixing plate 130 of the flatness securing unit 100 for repairing the precast panel for concrete pavement according to an embodiment of the present invention is concrete pavement Flatness can be secured in consideration of the slope of the damaged road surface.

In addition, the precast panel 200 is formed to form at least two through holes to enable the injection of the grouting material 220 and the coupling with the flatness ensuring unit 100. At this time, at least one mortar injection hole 210 for injecting grouting material is formed in the precast panel 200 for concrete pavement according to an embodiment of the present invention, the precast panel 200 is lifted to ensure flatness. In the grouting material 220 is injected. In addition, the precast panel 200 for concrete pavement according to an embodiment of the present invention may be a set anchor (Set Anchor) is installed to support the common load (shear force).

On the other hand, Figure 5 is a diagram illustrating a precast panel for concrete pavement according to an embodiment of the present invention.

Precast panel 200 for concrete pavement according to an embodiment of the present invention, as shown in Figure 5, can be produced in the size range of 50cm × 50cm × 10cm ~ 1m × 1m × 15cm, wherein the concrete flexural strength is It is produced at 45 kg / cm 2. Precast panel 200 for concrete pavement according to an embodiment of the present invention can be sufficiently satisfied the flexural strength criterion (4.5Mpa) when converted into compressive strength measurements. In addition, the precast panel 200 is made of concrete to have a compressive strength of 27Mpa or more by applying one type of concrete (for example, Gmax 25mm), the precast panel 200 is 50cm × 50cm × 10cm The thickness is determined in consideration of the shrinkage / expansion joint in the size of ˜1m × 1m × 15cm, and it is preferable to cure for 28 days using formwork.

On the other hand, Figures 6a to 6d is a view for explaining in detail the flatness ensuring unit for repairing precast panel for concrete pavement according to an embodiment of the present invention.

Flatness securing unit 100 for repairing precast panel for concrete pavement according to an embodiment of the present invention, as shown in Figure 6a, may be mounted on the road surface of the damaged portion.

In addition, in the flatness ensuring unit 100 for repairing the precast panel for concrete pavement according to the embodiment of the present invention, the pulley 150, as shown in Figure 6b, the wire rope 160 lifts the precast panel Can remain in one state.

In addition, the fixed plate rotation hinge 140, as shown in Figure 6c, for adjusting the support point angle, is formed on each end of the support brace 110 to enable left and right rotation of the fixed plate 130.

In addition, the fixing plate (steel plate) 130 is formed at each end of the support brace to ensure the flatness of the precast panel while limiting the height to lift the precast panel. Accordingly, in the state in which the pulley 150 lifts the precast panel 200, a part of the fixing plate 130 contacts the upper surface of the precast panel 200 to respectively contact the precast panel 200. The flatness of can be secured.

On the other hand, Figure 7 is a flow chart of the precast panel repair method for concrete pavement using the flatness ensuring unit according to an embodiment of the present invention, Figures 8a to 8g are respectively used for concrete pavement using the flatness securing unit according to an embodiment of the present invention 9A to 9H are photographs corresponding to the respective steps of the precast panel repair method for concrete pavement using the flatness securing unit according to the embodiment of the present invention. .

Referring to FIG. 7, in the method of repairing precast panels for concrete pavement using the flatness securing unit according to the embodiment of the present invention, first, a precast panel is manufactured ( S110 ). Here, the precast panel 200, as shown in Figs. 8a and 9a, a through hole for injecting grouting material and a through hole for fastening to be lifted by the flatness ensuring unit 100 is formed have. In addition, the precast panel 200 is made of concrete to have a compressive strength of 27Mpa or more by applying one type of concrete, the precast panel 200 is 50cm × 50cm × 10cm ~ 1m × 1m × 15cm The thickness is determined in consideration of the contraction / expansion joint, and it is preferable to cure for 28 days using formwork.

Next, the damaged portion road surface 300 to repair the partial section of the concrete pavement is cut ( S120 ). That is, as illustrated in FIGS. 8B and 9B, the damaged part road surface 300 is cut in correspondence to the standard size of the precast panel 200.

Next, as illustrated in FIGS. 8C and 9C, the cut part road surface 300 is cut off, and the precast panel 200 manufactured is prepared on site ( S130 ).

Next, the flatness ensuring unit 100 is mounted on the cut part road surface 300 ( S140 ). In this case, as shown in FIGS. 8D and 9D, the flatness securing unit 100 includes a tripod-type folding prop brace 110, an upper horizontal plate 120, a fixing plate 130, and a pulley 150. ), The wire rope 160 is configured.

Next, the cut damaged part road surface 300 and the precast panel 200 in the state in which the precast panel 200 is lifted by using the precast pulling pulley 150 of the flatness securing unit 100. Check the flatness between) ( S150 ).

Here, the flatness ensuring unit 100, as shown in Figure 8d and 9e, in the form of a tripod (tripod), the fixed plate (steel plate) of a predetermined size formed at each end of the three prop brace 110, As shown by reference numerals B and C, the flatness of the precast panel 200 is secured while limiting the height to lift the precast panel 200. In addition, when the concrete pavement damaged part road surface 300 is inclined, the flatness securing unit may secure the flatness of the precast panel 200 in consideration of the inclination of the damaged part road surface 300.

Next, the grouting material 220 is injected into the cut concrete pavement while maintaining the flatness of the precast panel 200 to fix the precast panel 200 ( S160 ). Here, the grouting material 220 is cured for 1 hour, as shown in FIGS. 8E and 9F, and the grouting material 220 is an elastic epoxy grout, which is based on one bag, 25 kg of super-speed mortar , 4.5 L of water and 2.5 g to 25 g of a retardant are combined, and the retardant dose may be determined according to the addition amount determination chart according to temperature.

Next, as shown in FIGS. 8F and 9G, a set anchor 230 is installed on the precast panel 200 to support the common load (shear force) ( S170 ).

Next, as shown in Figures 8g and 9h, the partially repaired damaged portion road surface 300 is cured, and the surface is finished ( S180 ). At this time, after curing the damaged road surface 300 partially repaired, the flattening unit 100 is removed and the surface is finished.

In the concrete pavement partial cross section repair process according to an embodiment of the present invention, the pavement flatness is secured by manufacturing a flatness securing unit capable of mounting the precast panel flat. In addition, the curing will determine the compounding ratio so that the pore-filling grouting material for attaching the precast panel to the existing package can be expressed more than 35Mpa per hour.

Flatness securing unit for repairing precast panel for concrete pavement according to an embodiment of the present invention is produced in the form of a tricycle, at this time, the height to lift the precast panel by installing a fixed plate (steel plate) of a predetermined size on the end of the three legs By ensuring the role of limiting the flatness is secured.

According to an embodiment of the present invention, the curing time can be shortened by 70% or more through the special formulation of the precast filler, and the site construction property can be improved through the flatness securing unit.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

100: flatness ensuring unit (tripod: Tripod)
200: Precast Panel
300: damaged road surface
110: prop
120: upper horizontal plate
130: fixed plate (steel plate)
140: fixed plate rotation hinge
150: pulley
160: wire rope
170: spacing chain
220: grouting material
230: Set Anchor

Claims (16)

As a flatness securing unit for securing the flatness of the precast panel when repairing the damaged section partial section of the concrete pavement using a precast panel,
A foldable prop of Tripod form;
An upper horizontal plate formed on the support brace;
Fixed plates formed at each end of the support brace to secure the flatness of the precast panel while limiting a height to lift the precast panel;
A wire rope coupled to the precast panel to lift the precast panel; And
Pulleys that wind up the wire rope so that the wire rope can lift the precast panel.
Flatness securing unit for repairing precast panel for concrete pavement comprising a. The method of claim 1,
In the state in which the pulley lifts the precast panel, a part of the fixing plate contacts each upper surface of the precast panel to ensure flatness of the precast panel. Flatness ensuring unit. 3. The method of claim 2,
The precast panel in contact with the fixing plate is a flatness ensuring unit for repairing the precast panel for concrete pavement, characterized in that to ensure the flatness in consideration of the slope of the damaged road surface of the concrete pavement. The method of claim 1,
Flatness securing unit for repairing the precast panel for concrete pavement further comprises a fixed plate rotation hinge formed on each end of the support brace so that the left and right rotation of the fixing plate. The method of claim 1,
Flatness securing unit for repairing precast panel for concrete pavement further comprises a spacing chain disposed between each of the three strut brace to maintain a horizontal gap between the strut brace. In the precast panel repair method for concrete pavement repairing the damaged section of the concrete pavement using a precast panel,
a) cutting the broken road surface to repair the partial section of the concrete pavement;
b) arranging the cut damaged road surface and preparing a precast panel manufactured on site;
c) mounting the flatness securing unit to the cut damaged road surface;
d) checking the flatness between the cut part road surface and the precast panel in a state in which the precast panel is lifted by using a precast pulling pulley of the flatness securing unit;
e) fixing the precast panel by injecting grouting material into the cut concrete pavement while maintaining the flatness of the precast panel;
f) installing a set anchor on the precast panel to support common load (shear force); And
g) curing the partially repaired damaged part road surface and finishing the surface
Precast panel repair method for concrete pavement using a flatness ensuring unit comprising a. The method according to claim 6,
The precast panel of step b) has a through-hole for injecting the grouting material and a through-hole for fastening so as to be lifted by the flattening securing unit, characterized in that the precast panel repair method for concrete pavement using the flatness securing unit . The method of claim 7, wherein
The precast panel is a concrete precast panel repair method using a flatness ensuring unit, characterized in that the concrete is made to have a compressive strength of 27Mpa or more by applying one kind of concrete. The method of claim 7, wherein
The precast panel is 50cm × 50cm × 10cm ~ 1m × 1m × 15cm to determine the thickness in consideration of shrinkage / expansion joints, and for concrete pavement using a flatness securing unit, characterized in that curing for 28 days using formwork How to Repair Precast Panel. The method according to claim 6,
The flatness securing unit of step c) is in the form of a tripod, the fixed plate (steel plate) of a predetermined size formed at each end of the three props, the flatness of the precast panel while limiting the height to lift the precast panel Precast panel repair method for concrete pavement using a flatness ensuring unit, characterized in that to secure. The method of claim 6, wherein the flatness ensuring unit,
A foldable prop of Tripod form;
An upper horizontal plate formed on the support brace;
Fixed plates formed at each end of the support brace to secure the flatness of the precast panel while limiting a height to lift the precast panel;
A wire rope coupled to the precast panel to lift the precast panel; And
Pulleys that wind up the wire rope so that the wire rope can lift the precast panel.
Precast panel repair method for concrete pavement using a flatness ensuring unit comprising a. 12. The method of claim 11,
The flatness securing unit, when the concrete pavement damaged part road surface is inclined, in consideration of the inclination of the damaged road surface to secure the flatness of the precast panel, characterized in that the precast panel repair for concrete pavement using the flatness ensuring unit Way. The method according to claim 6,
The grouting material of step e) is precast panel repair method for concrete pavement using a flatness ensuring unit, characterized in that curing for 1 hour. The method of claim 13,
The grouting material of the step e) is an elastic epoxy grout, precast for concrete pavement using a flatness ensuring unit, characterized in that 25kg ultra-speed mortar, 4.5L water and 2.5g ~ 25g retardant is formulated on a per package basis Panel repair method. 15. The method of claim 14,
The retarder dose is determined according to the addition amount determination chart according to temperature precast panel repair method for concrete pavement using a flatness ensuring unit. The method according to claim 6,
Method for repairing precast panels for concrete pavement using the flatness securing unit, characterized in that to remove the flatness ensuring unit after 20 minutes curing in step g), and finish the surface.

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