KR100691656B1 - anchor having umbrella ribs for repairing destroyed parts of underwater concrete structure and method for repairing destroyed parts using the anchor - Google Patents

Abstract

Umbrella anchor for repairing the fracture surface of the concrete structure installed on the land and water according to the present invention and the fracture surface repair method using the same, to install the umbrella anchor anchor on the fracture surface to repair the fractured area due to deterioration of the concrete structure Umbrella anchors installed to increase the repair effect by increasing mortar and adhesion after being poured are connected to each other by connecting a plurality of umbrellas and umbrellas installed around the support nuts fastened with screws to the central support rods where the thread grooves are formed throughout the body. Umbrella anchor made of a connecting material and the fracture surface repair method using the same step of identifying the chipping site by identifying the deterioration of the concrete structure; Fully chipping the marked chipping site; Installing a plurality of umbrella anchors in the fracture surface portion; Filling the fracture surface portion with a plurality of umbrella anchor anchors with mortar to complete the plastering; In the case of finishing the trimmed surface of the fractured surface of the finished concrete structure, the fractured surface of the concrete structure installed on the land is repaired.

When repairing the fracture surface of the underwater concrete structure installed in the water to check the deterioration of the concrete structure marking the chipping site; Fully chipping the marked chipping site; Installing a plurality of umbrella anchors in the fracture surface portion; A nozzle is installed at a center thereof, and a plate-shaped formwork having a plurality of bolt insertion holes formed at an edge thereof is fixed to a fracture surface portion of the underwater concrete structure using a set anchor bolt; Reinforcing and installing a plurality of rod members on the formwork; Completely sealing the boundary between the formwork and the concrete surface, and installing two hoses each for mortar injection and air discharge in the formwork; Draining the water inside the formwork using the two hoses and drying the inside; Spraying anti-neutralizing agent and anti-rusting agent in the formwork through the nozzle in the formwork center; Filling the mold with mortar, sealing and cutting the hoses and nozzles, and then finishing.

Description

Anchor having umbrella ribs for repairing destroyed parts of underwater concrete structure and method for repairing destroyed parts using the anchor}             

       1 is a view showing the umbrella anchor anchor of the present invention.

       Figure 2 is a detailed view showing in detail the installation of the umbrella of the umbrella anchor of Figure 1;

Figure 3 is a view showing a state in which a stainless steel umbrella anchor installed on the chipping site of the concrete structure according to the fracture surface repair method of the concrete structure according to the present invention.

Figure 4 is a view showing the manufacturing state of the formwork to be installed in the chipping site according to the fracture surface repair method of the concrete structure according to the present invention.

5 is a view showing a state in which the formwork is installed in the chipping site according to the fracture surface repair method of the concrete structure according to the present invention.

6 is a view showing the process of installing the formwork through the rubber packing between the formwork and the concrete surface in installing the formwork of FIG.

7 and 8 are views showing a state in which the reinforcing rod member is installed on the formwork after the formwork is installed according to the fracture surface repair method of the concrete structure according to the present invention.

9 is a view showing a state of sealing the boundary between the concrete surface and the formwork after the installation of the reinforcing rod member according to the repair method of the fracture surface of the concrete structure according to the present invention.

10 is a view showing a process of extracting and drying the water inside the formwork according to the fracture surface repair method of the concrete structure according to the present invention.

11 is a view showing a state in which the mortar is filled in the formwork after drying of FIG. 10 according to the fracture surface repair method of the concrete structure according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10 ... umbrella anchor 11 ... center support rod

12.Screw groove 13 ... Support nut

14 ... umbrellas 15 ... connector

16 ... outer umbrella length 17 ... inner umbrella length

101 ... concrete structure 103 ... formwork

104 ... Bolt insert hole 105 ... Nozzle insert hole

106 ... set anchor bolts 107 ... rubber packing

108 ... bar member 109,110 ... hose

111 ... mortar injector 115 ... spray nozzle

       The present invention relates to an umbrella bar anchor for repairing a fracture surface of a concrete structure and a fracture surface repair method using the same, and in particular, after the installation of the umbrella anchor anchor on the fracture surface of the concrete structure to increase the mortar and adhesion to be poured after repairing effect To increase the height, install an umbrella bar anchor made of a plurality of umbrella bars and a connecting member connecting the umbrella bars to the support nut fastened with screws to the central support bar with the screw groove formed on the whole body. In the case of concrete structures installed on land that have completed plastering to repair the fracture surface, and concrete structures installed underwater

The umbrella anchor is installed on the fracture surface, and the formwork made of synthetic material of fiber and epoxy is installed on the fracture surface (chipping area) of the underwater concrete structure, and after drying the inside, the fracture surface is effectively secured by filling mortar. The present invention relates to an umbrella anchor for repairing a fracture surface of a concrete structure that can be easily repaired, and a repair method using the same.

       In general, concrete structures are installed on land and in water. In the case of concrete structures installed on land, the concrete surface is gradually deteriorated by corrosion and acidification due to recurring temperature difference between the rainwater acidified by the polluted atmosphere and the outdoor air in summer and winter. Aging progresses through aging and the aging progresses, and the strength of concrete decreases rapidly, indicating the fragility of the structure. This part needs to be repaired. However, since it shows weakness in the adhesion and strength between the existing concrete and the repair mortar, a careful repair method is required. On the other hand, in the case of concrete structures installed underwater, all or part of the body of the structure is always submerged in the medium of water, and the external force is constantly externally affected by contact friction, bumps caused by waves, and water pressure due to rapid flow of water. Is getting. Therefore, in the underwater concrete structure, the most intensely affected areas or the most vulnerable parts by the water is gradually degraded, the chipping phenomenon occurs gradually. If this chipping phenomenon is not detected early and appropriate action is taken, the strength of the concrete structure is drastically lowered and finally leads to the worst case of collapse. In the case of concrete structures installed on land or in water, concrete structures installed in water are not easy to maintain and repair due to their situational characteristics. In other words, because it is necessary to overcome the obstacles of water and perform the desired work, technical, cost, and many difficulties are involved, and above all, safety accidents require special consideration because they require special consideration.

The present invention was created in view of the above-mentioned matters, an umbrella anchor for repairing a fracture surface of a concrete structure installed on land and underwater, which can effectively repair a fracture surface of a concrete structure, and a fracture surface repair method using the same. The purpose is to provide.

       In order to achieve the above object, the present invention is configured to perform repair on the broken surface portion of the concrete structure installed on land and water, the umbrella anchor for repairing the fracture surface of the concrete structure according to the present invention and the fracture surface using the same Repairing method is to install a plurality of umbrella anchor anchor 10 on the fracture surface to repair the site broken due to deterioration of the concrete structure, the umbrella anchor anchor installed to increase the repair effect by increasing mortar and adhesion strength 10 is a plurality of Umbrella 14 and Umbrella 14 installed around the support nut 13 of the square fastened with a plurality of screws installed in the central support rod 11 formed with a screw groove 12 in the entire body. In the construction method for repairing the fracture surface of the concrete structure using the umbrella anchor anchor 10 made of a connecting material (15) connected to each other,

       In the case of concrete structures installed on land

       (a) visually identifying the deteriorated portion of the concrete structure to be repaired and marking a chipping site;

       (b) completely chipping the marked chipping area by a predetermined area using a breaker;

       (c) installing the plurality of umbrella anchors at appropriate intervals in the fracture surface portion for secure adhesion of the new member to the concrete structure body;

       (d) filling the fracture surface with the plurality of umbrella anchors with mortar to complete plastering; And

       (e) It is characterized by consisting of the step of finishing the beauty of the fracture surface of the finished concrete structure.

       In this case, the umbrella anchor may be installed to increase the adhesion force with the mortar to be filled in the fracture surface portion, and after the adhesive is applied to the fracture surface, the umbrella anchor may be installed to fill the mortar with the fracture surface.

       On the other hand, in the case of concrete structures installed underwater

       (a) visually submerging the deteriorated portion of the underwater concrete structure to be repaired and visually marking the chipping site;

       (b) completely chipping the marked chipping site by an area using an underwater breaker;

       (c) installing the plurality of umbrella anchors at appropriate intervals in the fracture surface portion for secure adhesion of the new member to the underwater concrete structure body;

       (d) A plate-shaped formwork having strength and a degree of deflection to withstand hydraulic pressure is made relatively larger than the fracture surface portion, and a plurality of bolt inserts are formed at the edge of the formwork to fix the formwork to the underwater concrete structure. Forming a ball, forming a nozzle insertion hole for inserting the spray nozzle on the center of the formwork, and installing the nozzle in the nozzle insertion hole;

       (e) Forming holes in the concrete surface of the underwater concrete structure corresponding to the plurality of bolt insertion holes formed at the edge of the form by placing the formwork on the fracture surface portion, and then install the set anchor bolts respectively to form the formwork Fixing to the fracture surface portion of the;

       (f) installing a plurality of rod members spaced apart from each other at regular intervals on the formwork to prevent warpage to the outside due to pressure when water is injected into the installed formwork;

       (g) completely sealing the boundary between the formwork and the concrete surface using an underwater epoxy putty, while respectively installing two hoses for mortar injection and air discharge at predetermined portions of the formwork;

       (h) upon completion of the installation of the two hoses, natural curing for a sufficient time in the absence of external pressure;

       (i) After curing, inject air into one of the two hoses to drain the water inside the form with the other hose, and when the air finally comes out with the other hose, block the other hose to increase the pressure inside the form, and then Checking whether air is leaked from the air;

       (j) if there is no outflow of air as a result of the check, injecting air into the one hose and the air to escape to the other hose, the new air is passed through the inside of the formwork for a predetermined time to dry the formwork interior;

       (k) when the drying is completed, spraying the anti-neutralizing agent and the anti-rusting agent into the formwork using the spray nozzle installed in the step (d);

       (l) connecting the mortar injector to the other hose of the two hoses, and slowly injecting mortar while checking the pressure, and when the mortar injected into the one hose is discharged again, sealing the two hoses at the same time; And

       (m) After sealing the two hoses, it is characterized in that it comprises the steps of curing each hose and nozzle after curing sufficiently in the absence of the external pressure, and finishing the site with mortar.

       Here, in the step (e), in fixing the formwork to the fracture surface portion of the concrete structure using the set anchor bolt, and preferably after the rubber packing is fitted to the set anchor bolt, the formwork is fastened to the anchor bolt to fix it . The fitting of the rubber packing in this way is to prevent the sealing failure around the anchor bolt.

       In addition, in the drying operation of step (j), in the case of a salty area, after passing through the formwork with salt-free water to wash the salts on the inner surface of the fracture surface, and then perform the drying operation by air injection. do.

<Example>

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

       In accordance with the umbrella anchor for repairing the fracture surface of the concrete structure according to the invention and the fracture surface repair method using the same, as shown in Figure 1 and 2, the central support rod 11 is formed with a screw groove 12 in the entire body On the site of the broken umbrella anchor anchor (10) made of a connecting member (15) connecting the plurality of umbrellas (14) and the umbrellas (14) installed around the rectangular support nut (13) fastened with screws Install several. At this time, the material of the umbrella anchor anchor 10 may be selectively used steel, stainless, plastic material.

       In addition, the screw groove 12 installed around the central support rod 11 is installed in the groove formed in the center of the support nut 13 to be screwed with the screw groove 12 of the central support rod 11 to the desired center support rod. This is to install at the position of (11). The support nut 13 uses an angled nut. The support nut 13 is integrally connected to the angular surface, and the support nut 13 is connected to the installation material. The support nut 13 is hexagonal, pentagonal, etc. Optional use depending on the conditions. Umbrella 14 and the connecting member 15 is installed to increase the mortar and adhesive force when installing the umbrella anchor anchor 10 on the fracture surface and when mortar is poured, the number of installation is optional depending on the conditions of the site Install it. In addition, when the thickness of the umbrella (14) uses 1.5mm and 2.0mm, when the thickness of the umbrella (14) is 1.5mm, the connecting member 15 is installed between the umbrella (14) and the umbrella (14) When the length of the umbrella string 14 is 25 mm in total, the interval between the umbrella strings 14 to be set by the inner umbrella string length 17 is 20 mm, and the outer umbrella string length 16 is 5 mm. When the connecting member 15 is provided and the length of the umbrella string 14 is 50 mm in total, the length of the outer umbrella string 16 is 20 mm, the length of the inner umbrella string 17 is 30 mm, and the connecting member 15 is formed. When the length of the umbrella string 14 is set to 75 mm in total, the length of the outer umbrella string 16 is set to 35 mm, the length of the inner umbrella string 17 is 40 mm, and the connecting member 15 is installed. When the length of the flesh 14 is 100 mm in total, two connecting members 15 are installed, but the length of the outer umbrella flesh 16 is 40 mm, and the length of the inner umbrella flesh 17 is 20 mm. Umbrella length (1 The connection member 15 is provided so that the intermediate length of 7,16 may be 40 mm. In addition, in the case where the thickness of the umbrella meat 14 is 2.0 mm, two connecting members 15 for connecting the umbrella meat 14 and the umbrella meat 14 are installed, but the length of the umbrella meat 14 is 125 in total. In the case of mm, the length of the outer umbrella string length 16 is 50 mm and the length of the inner umbrella string length 17 is 25 mm, while the length between the inner and outer umbrella length lengths 17 and 16 is 50 mm. 15), if the length of the umbrella (14) to 150mm in total, the length of the outer umbrella meat 16, 50mm, the length of the inner umbrella meat (17) 50mm, but the length of the inner and outer umbrella meat The umbrella anchor 10 provided with the connecting member 15 is installed at the fracture surface area so that the intermediate length of the 17 and 16 is 50 mm. Looking at the process of performing the repair work using this, the repair method for the fracture surface area of the concrete structure installed on the ground first checks the deterioration part of the concrete structure to be repaired with the naked eye and marks the chipping site. Then, the chipping chipping part is completely chipped by a predetermined area using a breaker, and then filled with a mortar on the fracture surface part where the plurality of umbrella anchors are installed, to finish plastering and finish plastering. After finishing the trimmed surface, the repair work on the fractured surface of the concrete structure installed on the land is completed.

       In addition, the repair method for the fracture surface of the concrete structure installed underwater

 First, the deteriorated part of the underwater concrete structure to be repaired installed in fresh water and / or brine (sea water) is directly submerged to check with the naked eye and to mark the chipping site. Thereafter, the marked chipping site is completely chipped by a predetermined area using an underwater breaker.

When the chipping process is completed, as shown in FIG. 3, a plurality of the umbrella anchor anchors 10 are provided at appropriate intervals in the fracture surface portion for reliably bonding the new member to the concrete structure 101 body. Here, the use of the umbrella anchor anchor 10 in this way can be used as an adhesive for strengthening the adhesion with the repair mortar to be filled in the mold to be described later.

When the installation of the umbrella anchor anchor 10 is completed, as shown in Figs. 4 and 5, the degree of strength and a certain degree of bendability to withstand hydraulic pressure (even when the application site to the concrete structure is curved surface The plate-shaped formwork 103 having the sheet-shaped formwork 103 is made relatively larger (eg, about 10% larger than the chipping portion) than the fracture surface portion (chipping portion) 103c. Here, as the material of the sheet-like formwork 103, a synthetic material of fiber and epoxy is used. This is to ensure that the installation area is almost permanently durable without being corroded or degraded by water, taking into account the special circumstances of underwater.

In this way, when the production of the plate-shaped formwork 103 is completed, a plurality of bolt insertion holes 104 are formed at the edge of the formwork 103 to fix the formwork 103 to the underwater concrete structure 101 (for example, For example, a through-hole having a diameter of 20 mm is drilled at intervals of 100 mm to 200 mm, and a nozzle insertion hole 105 is formed on the center of the die 103 to insert the spray nozzle 115 into the nozzle insertion hole 105. Install. At this time, the connection side end part of the nozzle 115 is closed.

When the formation of the bolt insertion hole 104 and the installation of the nozzle 115 are completed, the die 103 is placed against the fracture surface portion to correspond to the plurality of bolt insertion holes 104 formed at the edge of the die 103. After the holes 101h are formed in the concrete surface of the underwater concrete structure 101, the set anchor bolts 106 (see FIG. 6) are respectively installed to form the die 103 at the fracture surface portion of the underwater concrete structure 101. Secure in.

Here, in fixing the formwork 103 to the fracture surface portion of the underwater concrete structure 101 by using the set anchor bolt 106, preferably as shown in Figure 6, to the set anchor bolt 106 After inserting the rubber packing 107, the formwork 103 is fastened to the set anchor bolt 106 to be fixed. The fitting of the rubber packing 107 in this way is to prevent the sealing failure around the set anchor bolt 106. In Fig. 6, reference numeral 106n denotes a nut and 106w denotes a washer, respectively.

In this way, when the installation of the formwork 103 is completed, as shown in Figures 7 and 8, when the water injecting the repair material (mortar) in the formwork 103, the formwork to prevent the bending to the outside due to pressure The plurality of rod members 108 are spaced apart from each other by a predetermined interval on the 103. At this time, the rod member 108 is installed using the set anchor bolt 106. When the installation of the rod member 108 is completed, as shown in Figure 9, using the underwater epoxy putty to completely seal the boundary between the formwork 103 and the concrete surface, while at a predetermined portion of the formwork 103 Two hoses 109 and 110 are respectively installed for mortar injection and air discharge.

When the installation of the two hoses (109, 110) is completed, the natural curing for a sufficient time (at least 24 hours) in the absence of external pressure. After curing, as shown in FIG. 10, air is injected into one of the two hoses 109 and 110 to remove the water in the form 103 through the other hose 110, and finally the other side. When air comes out of the hose 110, the other side of the hose 110 is blocked to increase the pressure inside the die 103, and in this state it is checked whether the air leaks. As a result of the check, if there is no outflow of air, the air is injected into the one hose 109 and the air is allowed to come out of the other hose 110, so that the new air is kept for a predetermined time (at least 30 minutes or more). Pass the inside to dry the formwork 103 inside.

Here, in performing the drying operation as described above, in the case where there is a salinity, after passing through the form 103 with salt-free water to clean the salts buried in the inner surface of the fracture surface, and then dried by air injection Do the work.

When the drying operation is completed, the anti-neutralizing agent and the rust preventive agent is sprayed into the form 103 by using the spray nozzle 115 already installed in the center of the form 103. Then, as shown in FIG. 11, the mortar injected into the one side hose 109 by connecting the mortar injector 111 to the other hose 110 of the two hoses, and gradually injecting mortar while checking the pressure When discharged again, the two hoses 109 and 110 are firmly sealed at the same time. Then, after sufficiently curing in the absence of external pressure, each hose 109 (110) and the nozzle 115 are cut, and the part is finished with mortar. This completes the repair of the fracture surface of the underwater concrete structure.

       As described above, the present invention is a construction method that can be repaired for the fracture surface of the concrete structure installed on land and water, umbrella anchor for repairing the fracture surface of the concrete structure according to the present invention and fracture surface repair using the same In the construction method, a plurality of umbrellas anchors made of a plurality of umbrellas installed on the support nut connected to the support nuts fastened with screws to the central support rods with the thread grooves formed on the entire body are connected to each other according to the site conditions. Later, after filling with mortar to repair the fracture surface of the concrete structure installed on the ground, or to install a plurality of umbrellas and umbrellas around the support nuts fastened with screws to the central support rod with a screw groove formed on the whole body A plurality of umbrella anchors made of connecting materials were installed on the fracture surface according to the site conditions. Afterwards, formwork made of synthetic material of fiber and epoxy is installed for perfect sealing on the fracture surface (chipping part) of the underwater concrete structure, and after drying the interior, the fracture surface is repaired by filling mortar, so that fresh water and brine ( Regardless of seawater), there is an advantage that can effectively repair the fracture surface of concrete structures installed underwater.

Claims (9)

        Umbrella anchor anchor for repairing the fracture surface of the concrete structure, characterized in that made of a connecting member connecting the plurality of umbrellas and umbrellas installed around the support nut of the rectangular shape fastened with screws to the central support rod formed with a screw groove on the entire body.         The method of claim 1        When the thickness of the umbrella flesh is 1.5mm, the spacing of the umbrella meat set by the connecting member installed between the umbrella meat and the umbrella meat is 20 mm when the length of the umbrella meat is 25 mm in total. Umbrella anchor for repairing the fracture surface of the concrete structure, characterized in that the installation of the connecting material by the length 5mm umbrella.         The method of claim 1        The thickness of the umbrella flesh is set by the connecting member installed between the umbrella flesh and the umbrella flesh when the thickness is 1.5mm, the length of the outer umbrella flesh 20mm, the inner umbrella Umbrella anchor for repairing the fracture surface of the concrete structure, characterized in that the connecting material is installed by the length of the 30 mm.         The method of claim 1        When the thickness of the umbrella flesh is 1.5mm, the spacing of the umbrella meat set by the connecting member installed between the umbrella meat and the umbrella meat is 35mm when the length of the umbrella meat is a total of 75mm, Umbrella anchor for repairing the fracture surface of the concrete structure, characterized in that the installation of the connecting material by the length of the umbrella flesh 40mm.        The method of claim 1        When the length of the umbrella flesh is 1.5 mm in thickness when the length of the umbrella flesh is 100 mm, two connecting members are installed, and the distance between the umbrella meats set by the connecting member installed between the umbrella meat and the umbrella meat is 40 mm. An umbrella bar anchor for repairing the fracture surface of a concrete structure, wherein the length of the inner umbrella is 20 mm, and the connecting member is installed so that the length of the inner and outer umbrellas is 40 mm.         The method of claim 1        When the length of the umbrella flesh is 2.0 mm when the length of the umbrella flesh is 125 mm, two connecting members are installed, and the distance between the umbrella flesh set by the connecting member installed between the umbrella meat and the umbrella meat is 50 mm. ㎜ and 25mm of the length of the inner umbrella, but the anchor of the anchor anchor for repairing the fracture surface of the concrete structure, characterized in that the connecting material is installed so that the length of the middle of the inner and outer umbrella is 50mm.         The method of claim 1        When the length of the umbrella flesh is 2.0 mm, when the length of the umbrella flesh is 150 mm, the length of the umbrella flesh is 2 mm. To 50mm, the length of the inner umbrella, 50mm, but the length of the middle and the inner side of the outer umbrella, the installation of the umbrella anchor for repairing the fracture surface of the concrete structure, characterized in that the installation to be 50mm. delete      (a) visually identifying the deteriorated portion of the concrete structure to be repaired and marking a chipping site;      (b) completely chipping the marked chipping area by a predetermined area using a breaker;      (d) filling the fracture surface with a plurality of umbrella anchors with mortar to complete plastering;      (e) In the method of repairing the fracture surface of the concrete structure consisting of the step of finishing and finishing the fracture surface area of the finished concrete structure,      (B) Between the step (d) and the step (c) to the concrete structure body of the connecting member for connecting the umbrella member and the umbrella flesh for the secure adhesion of the new member, and the installation position of the connecting member according to the thickness of the umbrella Breaking surface repair method using the umbrella anchor anchor for repairing the fracture surface of the concrete structure, characterized in that the step of installing a plurality of various anchor anchors at appropriate intervals in the fracture surface portion.

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