KR20010073340A - Cavity lock bolt for reinforced concreate structure - Google Patents

Abstract

PURPOSE: A cavity-lock bolt and a method for constructing the same are provided to easily and solidly perform repair/reinforcement works for restraining crack and preventing separation of structures, thereby reducing construction costs and preserving the structures. CONSTITUTION: A cavity-lock bolt includes a concavo-convex core bar(100) forming a tentacle(110) and a screw(120) for coupling a washer(130) and a nut(140) to the lower end, a plurality of holding blades(200) united with the core bar by a coupling band(210) and a settlement element(220), and a sealed stopper(300) forming a core bar insertion hole(310), and an injection pipe inserting hole(340) and an exhaust insertion hole(350) for inserting an injection pipe and an exhaust pipe.

Description

Cavity lock bolt and construction method {CAVITY LOCK BOLT FOR REINFORCED CONCREATE STRUCTURE}

The present invention relates to a cavity lock bolt (cavity-lock bolt) and its construction method, in particular, a mandrel that couples the washer and the fastening nut by screwing, and several locking wings that are bound to the mandrel by a fastening band or constituted by self-welding. And the cavity stopper of GRC (Glassfibre Reinforced Concrete) which can install the injection pipe and the exhaust pipe for injecting the injection, and the crack of civil engineering structure such as rock, ground, bridge, concrete building, joint concrete structure / Separation phenomenon repair / Reinforcement installation in the drilling hole formed in the drill hole in the self-supporting state by the hook blades, and then through the injection pipe and inject mortar, such as RE mortar, U & V-GHR through the injection pipe to harden for a certain time By allowing cavity lock bolts to be installed, repair / reinforcement works such as crack suppression and separation prevention can be easily and firmly installed to reduce air and construction costs. It is to provide cavity lock bolt and construction method which can economic effect and permanent preservation of structure.

In general, in the repair and reinforcement work such as cracking / separation of civil structures such as rock, ground, bridges, concrete buildings, and joint concrete structures, conventionally anchored bolts in which anchors are formed in reinforced concrete structures are installed. There was anchor bolt to fix the hole, and also drilled hole formed by fixing rock and concrete ground or drilling / reinforcing the repair / reinforcement part when repairing / reinforcing crack and separation of concrete structure. Expansion bolt (insertion-bolt) to be fixed to the () is used in recent years, especially in the form of a plate formed on both ends of the core bar (core bar) and the tube covering the core rod between the plate to install a hole After the cavity lock bolt is inserted into the tube, the tube is filled with an injection agent and the tube is expanded and cured in a state filled in the hole. Alternatively, cavity-lock bolts for repairing / reinforcing concrete structures have been disclosed in foreign countries.

These conventional cavity lock bolts do not have a self-supporting function in the drilling hole, so a separate installation tool is required, which is inconvenient for construction, and in particular, the ceiling lock bolt cannot be used, and the cavity lock bolts cannot be injected. There is a problem in that the inconvenience of the operation is large, resulting in the injection imbalance of the filling filled in the tube, the expansion force is not perfect and the leakage of the filling is not prevented, the loss of the filling is also large.

The present invention is to provide the cavity lock bolt (Cavity lock bolt) and the core rod with a fastening band so as to intervene in the crack / separation phenomena repair / reinforcement construction of civil structures, such as rock, ground, bridge, concrete construction, joint concrete structure Holes formed by drilling drills on the repair / reinforcement site, consisting of several locking blades that are attached to or welded to, and GRC sealing plugs that are inserted into the mandrel and into which the injection can be injected. After installation in the self-supporting state by the locking wing on the injection pipe, the injection mortar is injected through the injection pipe to fill and harden, and then the repair / reinforcement work can be easily and firmly constructed by combining the washer and the fastening nut to the mandrel screw. To provide a cavity lock bolt and its construction method.

In order to solve the problems of the conventional anchor bolt / expansion bolt / cavity rock bolt and its construction method in order to implement the object of the present invention, cracks of civil engineering structures, such as rock, ground, bridges, concrete building, joint concrete structure / Separation-type mandrel to form tentacles and screws, to combine washers and fastening nuts, several hooks to bind fastening band rolls to the mandrel, and pipe insertion to the mandrel. The present invention provides a cavity lock bolt as a sealing stopper for forming an injection tube insertion hole and an exhaust hole for injecting an injection agent.

Still another object of the present invention is to engage in a core rod by a core rod and a fastening band so as to easily and firmly construct a crack / separation phenomenon repair / reinforcement construction of a civil structure such as a rock, a ground, a bridge, a concrete building, and a joint concrete structure. Through the cavity lock bolt, which is composed of a sealing stopper to fill the wing and the injection agent, it is inserted into the drilling hole formed by the drilling drill in the repair / reinforcement construction part in a self-supporting state and then the injection agent is injected through the injection tube. After filling and hardening by mortar, the washer and the fastening nut are combined with the above mandrel screw to easily and firmly repair / reinforce the crack / separation phenomenon of civil structures, concrete buildings, and joint concrete structures such as rock, ground, and bridge. To provide a cavity rock bolt construction method that can be installed.

1 is an exploded perspective view of a cavity rock bolt implementing the present invention

2 is a partial cross-sectional view of the cavity rock bolt in accordance with the present invention.

3-9 is a crack / separation phenomenon prevention repair / reinforcement by the cavity lock bolt of the present invention

Process chart

* Symbol description for main part of drawing *

100; Mandrel 110; tentacle

120; Screw 130; Irregularities

200; Hanging wing 210; Fastening band

220; Binder 300; Sealing stopper

310; Mandrel tube insertion 320; Injection tube

330; Exhaust pipe 340; Injection Pipe Inserter

350; Exhaust pipe duct 400a, 400b, 400c; Foundation (zone) concrete part

500; Joint concrete part 600; Drill hole

700; Injection 800; Sealing part

Features of the present invention are the cavity rock bolts installed in the drilling holes formed by drilling drills in the repair / reinforcement part during repair / reinforcement of civil structures such as rock, ground, bridges, concrete buildings, and joint concrete structures. The cavity lock bolt is composed of a concave-convex mandrel, a plurality of engaging blades formed on the mandrel, and a sealing stopper for inserting the mandrel into the mandrel.

Another feature of the present invention is the cracks and separation of civil engineering structures, such as rock, ground, bridges, concrete constructions, joints, cracks, separation phenomenon repair / reinforcement construction of the perforated hole in the uneven core and several hooks and sealing plugs After inserting the cavity lock bolt, which is made up of self-supporting state by the locking blade in the drilling hole, injecting the mortar injection material through the mill-bone stopper, filling and curing, and then washer and fastening nut to the mandrel screw. In combination with rock, ground, bridges, civil rock structures, concrete buildings, cracked / segregation phenomenon of the joint concrete structure is a cavity rock bolt construction method that can be easily and firmly constructed.

Next, the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are exploded perspective and side cross-sectional views of the cavity lock bolt of the present invention. The cavity lock bolt has an uneven shape, the tip portion of the tentacle 110 and the rear end of the cavity lock bolt are formed to form a washer 130. ) And the engaging rod (100), which allows the fastening nut 140 to be coupled, and a plurality of locking blades (200) for binding to the mandrel (100) by the fastening band (210) and the fastener (220), and the center. Injection tube 320 and the exhaust pipe for injecting the mandrel tube insertion hole 310 and the injection

Consists of a sealing stopper 300 for forming the injection pipe insertion hole 340 and the exhaust pipe insertion hole 350 into which the 330 is inserted, respectively, and inserts it into the drilled hole formed by the drilling drill in the construction site.

At this time, the core rod 100 is made of iron, metal (SD-35 or more) is formed here

Concave-convex portion 130 may be formed in the entire or equal intervals according to the length of the mandrel, mandrel

(100) It can be carried out by arbitrarily configuring the number of the locking wing 200, which is bound by the fastening band 210 around the core rod 100 according to the length and construction conditions, and the screw 120 can be formed by itself Although it is preferable to configure separately by welding,

In addition, the sealing plug 300 is formed of Glass Fiber Reinforced Concrete (GRC).

Mold is most preferred, and the GRC for manufacturing the sealing stopper 300 is composed of cement, sand, com-star superplasticiser, glass fiber, water.

Figure 3 is a side cross-sectional view of another cavity rock bolt of the present invention, the cavity rock bolt is a concave-convex type, the tip portion is tentacles 110 and the rear end is configured by its own hammer process or a separate cutting process The mandrel 100 configured to join the washer 130 and the fastening nut 140 by constituting the screw 120 made of welding, and several hook blades 200 configured by welding to the mandrel, It consists of a sealing plug 300 which forms an injection pipe insertion hole 340 and an exhaust pipe insertion hole 350 into which the mandrel pipe insertion hole 310 and the injection pipe 320 for injecting the injection agent and the exhaust pipe 330 are respectively inserted. .

3 to 7 is a crack / separation phenomenon by the cavity lock bolt of the present invention

This is a process chart for water / reinforcement work. Prevents repair / repair of concrete structures that undergo cracking / separation of wall civil structures, wall concrete structures, and joint concrete structures including ceilings / floors such as rock, ground, and bridges. As a reinforcement example, the process of constructing the cavity lock bolt of the present invention to the repair / reinforcement site in which the crack or separation shape progresses in the joint concrete part 500 including the ground concrete part 400a and the additional concrete part including the rock As a process diagram, as shown in Figure 4, the drilling hole in the drilling process from the joint concrete portion 500 to the wall (base) concrete portion (400a) including the base, the base, with a conventional drilling drill

Form 600.

As described above, the drilling hole 600 by the drilling process is formed in the wall civil structure, including the ceiling / floor, such as rock, ground, bridge, wall concrete building and the core hole in the drilling hole 600 thereof as in the present invention A plurality of hooking blades 200 are formed around the core 100, and a cavity lock bolt constituting the sealing plug 300 is inserted to engage the core rod 100 on the center line of the drilling hole 600 by the locking blades 200. ) Is installed in a self-supporting state to be placed, and the seating process of the cavity lock bolt to seal the drilling hole 600 with the sealing stopper 300 is made, at this time the locking wing

Cavity lock bolt 200 is formed on the wall by the locking action of the cavity lock bolt is not drawn out of the punching hole 600 can be installed quickly and securely and can be installed quickly and easily to save air and money.

5 is a process diagram illustrating a process of constructing the cavity lock bolt of the present invention, and as shown in FIG. 4, the sealing plug 300 after the cavity lock bolt is installed in the drilling hole 600 by the mounting process of the cavity lock bolt. ) To fill the injection into the drilling hole by forcibly injecting the filler 700 of the filling mortar through the injection pipe 320 installed in the drilling hole 600, wherein the distal end of the injection pipe 320 is perforated The injection agent 700, which is placed inside the hole 600 and is injected through the injection tube 320, is evenly filled from the inside of the drilling hole 600 to the sealing plug 300, as illustrated in FIG. 5. As described above, a filling process of an injection agent without space or bubbles is performed between the injection agent 700 injected into the hole 600 or between the hole 600 and the injection agent 700.

As such, the cavity lock bolt of the present invention is provided with a sealing stopper 300 to drill holes.

Since the injection agent 700 injected into the 600 is not leaked to the outside by the sealing plug 300, the filling process of the injection agent is simple and quick, and at the same time, the loss of the injection agent 700 can be prevented. It is suitable and effective for the installation of cavity rock bolts and filling of filling materials in structures, solid structures, as well as ceiling / floor structures and wall structures.

At this time, the injection sin in the filling process of the injection as described above to form the injection (700)

Silver Filling Mortar (U & V-GHR) is composed of epoxy resin, titanium oxide, reactive diluent, filler (TALC), antifoaming agent, epoxy curing agent, underwater adhesive, low temperature curing agent, curing accelerator, filler.

(TALC), an epoxy curing agent composed of an antifoaming agent. Additives are filled mortar, optionally mixed with ordinary portend cement, garnet and white portland cement.

Figure 6 is a process diagram illustrating a process of constructing the cavity lock bolt of the present invention, the

As shown in FIG. 5, the injection hole 700 is uniformly densified by the filling process of the injection agent.

After filling in the 600, a predetermined time has elapsed, the injection agent is filled in the drilling hole 600

As the 700 is cured, the cavity lock bolt of the present invention is firmly installed in the drilling hole, wherein a plurality of uneven portions 150 are formed in the core rod 100 constituting the cavity lock bolt of the present invention. It is firmly fixed in the injection 700, and also a plurality of hanging wings (200)

The cavity lock bolt is perfectly fixed by supporting the inner wall surface of the drilling hole 600.

At this time, at several places arbitrarily around the core rod 100 of the caviky lock bolt of the present invention

Concavities and convexities 150 are formed, which is filled between the drilled hole 600 and the mandrel 100 so that the bonding with the hardened injection agent 700 is made firmly, and thus the mandrel 100 is perfectly fixed and cracked. It will perform the separation prevention function perfectly.

Tensile strength (SD-35) is 50kgf / mm2 or more, yield point (SD-) by repairing and reinforcing the crack / separation state of the ground concrete (400a) and the joint concrete (500) by the curing process as described above 35) is 35-45kgf / mm 2, and the elongation (SD-35) is maintained at 18% or more.

In this case, U & V-GHR mortar is used as the injector 700 and the mandrel 100 is made of iron (SD-35).

Phase).

7 is a process diagram illustrating a process of constructing the cavity lock bolt of the present invention.

After the cavity lock bolt is firmly installed in the drilling hole 600 by the hardening process of the injector as intention 6, the washer 130 and the screw 120 formed on the core rod 100 of the cavity lock bolt of the present invention. Repair / reinforcement construction is completed by sealing process that tightens fastening nut 140 and finishes with sealing part 800, so that cracks / separation of civil structures such as rock, ground, bridge, concrete building, and joint concrete structure Cracks caused by cavity rock bolts, which are supported by the cavity rock bolts of the present invention, such as the ground concrete parts 400a and the padded concrete parts, which are supported by the cavity rock bolts of the present invention. / Separation prevention prevention repair / reinforcement construction is completed.

Civil structure such as rock, ground, bridges, etc. by cavity rock bolt

It can be applied to the construction fields such as roads, bridges, dams, railways, subways, nuclear power plants, joint infrastructures, and building foundations.

FIG. 8 is a process chart for carrying out the construction process of the cavity lock bolt of the present invention to the ceiling (ground) concrete section, and here the cavity lock bolt is also applied to the ceiling concrete section 400b and the drilling hole as in the process chart performed on the wall portion. Filling mortar injection 700 through the injection pipe 320 installed in the drilling hole 600 through the sealing stopper 300 after installation in the 600

) Is forcibly injected to fill the injection in the drilling hole, in which the distal end of the injection pipe 320 is placed above the drilling hole 600 so that the injection 700 injected through the injection pipe 320 is drilled. Filled evenly from the sealing plug 300 is located at the bottom of the 600 and the air of the drilling hole 600 is completely discharged through the exhaust pipe 330, so the space inside the injection injected into the drilling hole 600 or The injection filling process is performed so that the bubbles are not far off.

As such, the washer 130 and the fastening nut 140 are fastened to the screw 120 formed on the core rod 100 of the cavity lock bolt in which the cavity lock bolt is firmly installed in the drilling hole 600 formed on the ceiling by the curing process of the injection. As the repair / reinforcement construction is completed by tightening and finishing the finishing process of the sealing part 800, the rock which has undergone cracking / separation of ceiling civil structures, ceiling concrete buildings, and joint concrete structures such as rock, ground, and bridge The joint concrete part 500 including the ceiling concrete part 400b and the padded concrete part is supported by the cavity lock bolt of the present invention to prevent cracking / separation prevention by the cavity lock bolt in which the crack / separation phenomenon is stopped. Reinforcement construction is completed.

9 is a ground concrete portion of the bottom of the cavity rock bolt construction process of the present invention

As a process diagram carried out on (400a), the cavity lock bolt is installed in the drilling hole 600 and then installed in the drilling hole 600 after the cavity lock bolt is installed in the drilling hole 600 as in the process chart performed on the wall portion. The injection tube 320 and the exhaust pipe 330 are configured to be wide, and the injection 700 of the filling mortar is forcibly injected through the injection tube to fill the injection agent in the perforation hole. The injection 700 is injected through the filling hole evenly from the bottom of the hole 600 and the air in the hole 600 is completely discharged through the air pipe 330 inside the injection injected into the hole 600 Filling process is performed so that there are no gaps or bubbles at all.

As such, the washer 130 and the fastening nut 140 are formed on the screw 120 formed on the core rod 100 of the cavity lock bolt, which is firmly installed in the cavity hole 600 in which the cavity lock bolt is formed at the bottom by the curing process of the injection. Tightening composition and repair / reinforcement construction is completed by the finishing process of the sealing unit 800, such as rock, ground, bridges, such as flooring civil structure, flooring concrete building, joint concrete structure crack / separation phenomenon Preventing cracking / separation by cavity rock bolts, which are supported by cavity rock bolts of the present invention, including bottom concrete parts 400b and padded concrete parts, which are supported by cavity rock bolts of the present invention. Repair / reinforcement construction is completed.

Civil structures, such as rock, ground, bridges, etc., by cavity rock bolts as described above

The crack / separation prevention repair / reinforcement method for the construction of concrete and jointed concrete structures can be applied in the civil engineering field of roads, bridges, dams, railways, subways, nuclear power plants, joint gardens and building foundations.

Such, the present invention is a concave-convex mandrel to form tentacles and screws, and fastening band and

The locking wing which is bound around the mandrel as a binding port, and the sealing plug which is installed in the mandrel and can harden the injection in the state of filling, constitutes the cavity lock bolt, and the civil structure such as rock, ground, bridge, concrete building, Rock, ground, bridge by the process of inserting into the drilled hole drilled in the cracked / separated phenomenon repair / reinforcement of the jointed concrete structure and placing it in the self-supporting state by the locking wing and curing the injected agent in the filled state in the drilled hole. It is a useful invention that can economically reduce air and construction costs and make permanent preservation of the structure by easily and firmly constructing the crack suppression and separation prevention / reinforcement work of civil structures, concrete structures, and joint concrete structures. .

Claims (3)

Concave and convex form the shaft 110 and the screw 120 to allow the washer 130 and the fastening nut 140 to be coupled to the rear end 100, and the fastening band 210 to the mandrel 100 And the locking blade 200 which is bound to several places with the binding hole 220 and the injection tube 320 and the exhaust pipe 330 for injecting the mandrel tube insertion hole 310 and the injection agent in the center, respectively. Civil engineering structures such as walls / ceilings / floors, such as rock, ground, and bridges, including concrete, pipe joints 340 and exhaust pipe insertion holes 350, and cracks of concrete structures, joint concrete structures, etc. Cavity lock bolt for separation prevention / reinforcement construction. The mandrel 100 of claim 1, wherein the mandrel 100 is formed to have a concave-convex shape and a shaft 120 and a screw 120 so as to allow the washer 130 and the fastening nut 140 to be coupled to the rear end, and the mandrel 100. Hanging blades 200 formed in several places by welding to the injection tube insertion hole 340 into which the mandrel tube insertion hole 310 and the injection tube 320 and the exhaust pipe 330 are respectively inserted into the center. Cavity lock bolt, characterized in that consisting of a sealing plug 300 to form an exhaust pipe insertion hole (350). Forming the shaft 110 on the tip and the concave-shaped mandrel 100, which allows the washer 130 and the fastening nut 140 to be coupled, and the engaging blade 200 bound to several places of the mandrel, Cavity of the cracks / separation of civil engineering structures such as rock, ground, bridges, concrete structures, and joints The cavity installed by the rock bolt seating process which seats cavity rock bolt in the drilling hole 600 which drilled from the joint concrete part 500 to the ground concrete part 400a, 400b, 400c, and the cavity installed by said mounting process. Cavity filling process for injecting the filling mortar injection 700 into the boring hole 600 through the injection pipe of the sealing stopper 300 of the rock bolt, the cavity injected after the filling process is cured Screw 120 formed on the core rod 100 of the rock bolt Civil construction such as wall / ceiling / floor such as rock, ground, bridge, etc., characterized by the sealing process of fastening the washer 130 and the fastening nut 140 and finishing with the sealing part 800, and concrete building and joint concrete Construction method using cavity lock bolt for repairing / reinforcement of crack / separation phenomenon