KR101132809B1 - Anchor body and construction method - Google Patents

Abstract

PURPOSE: An anchor body and a construction method thereof are provided to maximize supporting force against the movement of the ground, reduce costs by using minimal parts for an anchor body, and tension strands accurately. CONSTITUTION: An anchor body(100) comprises a fixing head(110), a hollow pipe(120), a plurality of strands(130), support blocks(140), a tension block, and a pressure plate(160). The fixing head(119) is coupled with a support(119), in which a borehole is perforated, in the rear end and supported by cutting blades(116). The front end of the hollow pipe is coupled to the rear end of the fixing head by screws. The front ends of the strands are coupled to the support of the fixing head. The support blocks are coupled to the rear side of the strands, and have a center hole(141). The tension block is screw-coupled to the rear side of the hollow pipe. The tension block is perforated through the center hole of the support block and the front end of the support block is hung on a hanging projection, thereby pulling the strands. The tension block and the strands are passed through the pressure plate in order to be fixed.

Description

Anchor body and construction method

The present invention relates to an anchor body and a construction method, and more particularly, to an anchor body and a construction method that allows the tension line of the anchor body installed in the ground to be easily and conveniently tensioned at the same time as the installation.

In general, the anchor body is formed by drilling an anchor hole in the ground, and inserting a tensile material having excellent tensile strength into the anchor hole together with the internal fixing agent and the inner body, and then injecting it into a grouting material such as concrete to fix it firmly. It secures strong fixing power by applying load to the free end and fixing it with external fixing agent to secure structures such as earth walls. It is used to prevent the collapse of the surrounding ground during excavation work for underground structures in construction and civil engineering works. It is widely used in construction for suppressing soil loss on soft ground incision surface.

In other words, when the ground slope changes, it protects or reinforces the slope by using a retaining wall, which is a wall structure that is installed to prevent the collapse of soil and maintain stability by resisting water pressure or soil pressure caused by ground behavior. It is an anti-earth pressure structure that maintains stability by using the weight of the floor and the frictional force of the bottom surface. It is designed to secure stability against falling or slipping, and it is divided into earth anchor method and soil nailing method to reinforce it.

Soil nailing method is used for construction of excavation support system, construction of existing retaining wall and retaining wall required for construction of civil engineering-related facilities such as reinforcement of natural and artificial slopes adjacent to trenches, muds, railways and roads, underground structures and tunnels. A series of reinforcement works are carried out through the excavation or cutting process, and the excavation surface is constructed with shotcrete, and the excavation back surface is constructed at the same time as the excavation at the stable height to stand the slope or the excavation excavation surface. Insert a nail by drilling and grout it to form a reinforced earth.

In other words, by inserting the reinforcing bar nail into the excavation back at a narrow interval, the overall shear strength is increased to reinforce the existing ground to form a reinforcement soil that acts integrally like a gravity retaining wall.

The earth anchor method inserts a stranded wire into a drilled hole, grouts it with cement mortar, and pulls the stiffness to fix it to a pressure plate so that the slope is reinforced with tensile stress.

On the other hand, rock bolts are a kind of support method for underground structures, tunnels, or the like, or bolts or roof bolts used therein.

This drills holes in the rock around the tunnel, approximately 36-40 mm in diameter and more than 2 m deep and bolts into the holes.

There are two principles of the rock bolt 100. One is that when the rock on the direct ceiling which is easy to separate is strong, the rock bolt is hung on the rock directly, and the other is peeling. By combining several prone rocks, they create a beam or purlin to support anti-pressure.

Based on these two principles, the method of bonding the rock bolt to the rock includes a front end bonding method and a front side bonding method.

Based on the bonding method, the two methods are commonly mechanical (wedge). Resin type. It is divided into mortar type and the like.

Rock bolt is thick depending on the situation of the rock. Several kinds of lengths are used.

The rock bolt forms a hole in the ground including mountain rock in civil construction work, especially in tunnel work.

At this time, a predetermined number of explosives, for example, dynamite, are exploded in the perforated hole to break the rock and widen the base hole of the tunnel.

After drilling the foundation tunnel at a certain height and width, in order to prevent the collapse of the foundation tunnel, we put a myriad of rock bolts inside the foundation tunnel, install mesh mesh in the shape of mesh and finally cast concrete. Reinforcement work will be performed.

This reinforcement film is first drilled into the rock by using a rock drill or crusher, and then the cement mortar is inserted into the hole and the roll bolt or the rock bolt is inserted before the cement mortar.

After the cement mortar has fully cured, the rock bolts are firmly fixed in the rock.

Here, by installing a plurality of rock bolts at predetermined intervals, the rock bolts sufficiently endure the concrete load sprayed on the mesh body and maintain the fixed state firmly.

However, such a conventional anchor body related technology is not only easy to stretch but also takes a long time because the tension is stretched by using a tensioning device after the hardening by injecting the grouting material after inserting the anchor body in the drilling hole.

Therefore, the main object of the present invention is to provide an anchor body and a construction method that can be appropriately to maximize the bearing capacity according to the behavior of the ground, but can be easily tensioned at the same time the installation of the strand coupled to the anchor body.

Another object of the present invention is to provide an anchor body and a construction method for simplifying the structure of the anchor body to minimize the number of parts to reduce the cost and precisely tension the strand.

In order to achieve the above object, the anchor body of the present invention is inserted into a drilling hole and fixed with a cutting edge, but having a supporter at the rear side, a hollow pipe for screwing a shear at the rear end of the fixing head, and the fixing A plurality of strands for coupling the front end to the support of the head, the support block is coupled to the rear side of the strand and forming a center hole in the center, screwed to the rear side of the hollow pipe, but through the center hole of the support block It consists of a tension block for pulling the strands by the front end of the support block to the jaw, and a tension block screwed to the hollow pipe and a pressure plate for fixing through the strands.

In the anchor body construction method of the present invention, the drilling hole is drilled on an inclined surface and the anchor body is inserted, and the cutting edge of the drilling hole cuts the inner circumference of the drilling hole by pressing while rotating the anchor body inserted into the drilling hole. When the anchor body is fixed to the drilling hole, and the tension block is rotated by pulling the support block to the tension block 130 is fixed to the support block is configured as a basic feature in the technical configuration.

In the anchor body and the construction method of the present invention, the punching hole is drilled on the slope and the anchor body is put therein, and then, while rotating the anchor body, the cutting edge cuts the inner circumference of the drilling hole to fix the anchor body, and in this state, tension Tension the strand by rotating the block or by rotating the hollow pipe, in particular, if the front end of the support block is caught on the locking jaw of the tension block to rotate the tension block to move the support block and the tension block to the rear to tension the strand It can respond appropriately to maximize the bearing capacity according to the behavior of the ground, but it can easily tension the stranded wire coupled to the anchor body at the same time as it is installed, and the structure of the anchor body is simplified to minimize the number of parts to reduce the cost and accurately the stranded wire. The effect is to tension.

1 is a cross-sectional view of the anchor body insertion state shown to explain the anchor body and construction method according to the present invention.
Figure 2 is a cross-sectional view anchored state shown to explain the anchor body and construction method according to the present invention.
Figure 3 is a cross-sectional view of the anchor body tension state shown to explain the anchor body and construction method according to the present invention.
Figure 4 is a cross-sectional view of another anchor body insertion state shown to explain the anchor body and construction method according to the present invention.
Figure 5 is a cross-sectional view of another anchor body fixed state shown to explain the anchor body and construction method according to the present invention.
Figure 6 is a cross-sectional view of another anchor body tension state shown to explain the anchor body and construction method according to the present invention.

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

As shown in Figures 1 to 3, the anchor body 100 of the present invention is inserted into the drilling hole and fixed with a cutting edge 116, but the fixing head 110 having a support 119 on the rear side, and Hollow pipe 120 for screwing the shear to the rear end of the fixing head 110, a plurality of strands 130 to couple the shear to the support 119 of the fixing head 110, and the strand 130 Is coupled to the rear side of the support block 140 to form a center hole 141 in the center, and screwed to the rear side of the hollow pipe 120, but through the center hole 141 of the support block 140 locking jaw A tension block 150 for pulling the strand 130 by pulling the front end of the support block 140 at 152, and penetrating the tension block 150 and the strand wire 130 screwed to the hollow pipe 120. And acupressure plate 160 to be fixed.

The fixing head 110 drills the operation hole 111 at the front end and the cutting hole 112 at the left and right, and forms a screw hole 113 at the center of the rear side, but the pressure hole 114 at the operation hole 111. Insert the protrusion to protrude forward and the cutting edge 116 to the inner side of the cutting hole 112 is coupled to the rotating shaft 117 to protrude laterally.

Further, the tapered shape of the pressure block 115 is formed at the rear end of the pressure bar 114, and the cam 118 corresponding to the pressure block 115 is formed at the rear end of the cutting edge 116, so that the pressure block 115 is formed. Pressing the cam 118 causes the cutting edge 116 to axially rotate to protrude laterally.

Further, the rear end of the fixing head 110 is coupled to the center hole is coupled to the perforated support 119 to be idle.

The hollow pipe 120 forms screws 121a and 121b on the front and rear outer peripheries, and couples the front screws 121a to the screw holes 113 of the fixing head 110 through the support 119. .

The strand wire 130 is formed by twisting the steel wire is coupled to the front end of the support 119 of the fixing head 110.

The support block 140 drills the center hole 141 at the center and forms a plurality of taper holes 142 concentrically on the outward side of the center hole 141, but has a wedge 143 and a taper hole 142. It is preferable to fix the strand 130 passing through).

The tension block 150 forms a screw hole 151 in the center to screw through to the hollow pipe 120 to form a hooking jaw 152 in the front end to form a rotating nut 153 on the rear side. .

Here, the tension block 150 passes through the center hole 141 of the support block 140 so that the locking jaw 152 is caught by the front end of the support block 140, but the rotation nut 153 is separated for convenience of assembly. It is desirable to be able to combine.

The acupressure plate 160 drills the center hole 161 and drills a plurality of guide holes 162 toward the outward side of the center hole 161, and the tension block in which the hollow pipe 120 is screwed to the center hole 161. The penetrating member 150 passes through the guide hole 162, and the strand wire 130 penetrates the guide hole 162.

In addition, the guide hole 162 of the acupressure plate 160 is preferably formed to correspond to the tapered hole 142 of the support block 140 to smoothly guide the strand 130.

On the other hand, as shown in Figs. 4 to 6, the anchor body 100 of the present invention, the screws 121a, 121b formed on the front and rear outer periphery of the hollow pipe 120 in the reverse direction and the support of the fixing head 110 The center block 141 of the earth 119 and the support block 140 may be screwed to remove the tension block 150.

In this case, the anchor body 100 is inserted into the drilling hole, the anchor body 100 is rotated while pressing, and the cutting edge 116 cuts the inner circumference of the drilling hole to fix the anchor body 100 and then the hollow pipe 120 The reverse rotation is to pull the strand (130) while pulling away the distance between the support 119 and the support block 140 of the fixing head 110.

Here, the support 119 of the fixing head 110 is preferably screwed.

In the anchor body construction method of the present invention as shown in Figures 1 to 3, the step of drilling a hole in the slope and injecting the anchor body 100, and by pressing while rotating the anchor body injected into the drilling hole The cutting edge 116 of the drilling hole to cut the inner periphery of the drilling hole to fix the anchor body 100, and when the anchor body 100 is fixed to the drilling hole to rotate the tension block 150 to support the block 140 Pull the strand (130) is configured to tension.

In the inserting step into the anchor body 100, the anchor body 100 is assembled and put as described above.

In the fixing step of the anchor body 100, while pressing and rotating the hollow pipe 120 of the anchor body 100, the pressure bar 114 is pressed so that the pressure block 115 presses the cam 118 to the cutting edge 116. Since it rotates while being rotated around the rotary shaft 117, the anchor body 100 is fixed by cutting the inner circumference of the drilling hole.

Here, the rear side of the hollow pipe 120 and the stranded wire 130 passes through the center hole 161 and the guide hole 162 of the pressure plate 160.

At this time, the support pipe 140 is coupled to the hollow pipe 120 and the stranded wire 130 is located slightly inside the inlet of the drilling hole, and also coupled to the screw 121b of the hollow pipe 120 by the screw hole 151 The locking jaw 152 of the tension block 150 is maintained at the front end of the support block 140, the rear side of the tension block 150 together with the hollow pipe 120, the center hole 161 of the acupressure plate 160 Protrudes through), the rotary nut 153 is coupled to the rear side of the protruding tension block 150.

In the tensile step 130, the tension block 150 is rotated by turning the rotation nut 153 of the tension block 150 is supported by the tension block 150 caught on the front end of the support block 140 is screwed to the hollow pipe 120 and moved to the rear side. Block 140 is moved to the rear side.

Therefore, the strand wire 130 fixed to the wedge 143 in the tapered hole 142 in the support block 140 is also pulled to move to the rear to obtain the desired tensile force.

On the other hand, when removing the tension block 150, as shown in Figures 4 to 6, the cutting block 116 is rotated while pressing the anchor body 100 in the state in which the tension block 150 is removed By cutting the inner circumference to fix the anchor body 100 and then rotating the hollow pipe 120 in reverse, the distance between the support 119 of the fixing head 110 and the support block 140 is farther away from the strand 130. To pull the tension.

100: anchor body 110: fixing head
111: working hole 112: cutting hole
113: screw hole 114: pressure bar
115: pressure block 116: cutting edge
117: rotating shaft 118: cam
119: support 120: hollow pipe
121a: screw 121b: screw
130: stranded line 140: support block
141: center ball 142: tapered ball
143: wedge 150: tension block
151: screw hole 152: locking jaw
153: rotating nut 160: pressure plate
161: Center Ball 162: Guide Ball

Claims (9)

The pressure bar 114 is inserted into the working hole 111 formed at the front end to protrude forward, and the cutting bar 116 is coupled to the inner side of the cutting hole 112 by the rotary shaft 117 to form a steel bar of the pressure bar 114. Fixing head 110 to protrude laterally to the side, and combines the support 119, the center hole perforated at the rear end,
Screw the front end to the rear end of the fixing head 110, the screws 121a, 121b formed on the front and rear outer periphery are formed with left and right screws, respectively, the support 119 and the support block of the fixing head 110 Hollow pipe 120 for coupling the center hole 141 of 140 with screws 121a and 121b, respectively,
A plurality of strands 130 and the shear coupled to the support 119 of the fixing head 110,
Is coupled to the rear side of the strand 130, the center hole 141 in the center of the support and to form a plurality of tapered holes 142 provided with wedges 143 concentrically on the outward side of the center hole 141 Block 140, and
Anchor body, characterized in that consisting of a pressure plate 160 to pass through the hollow pipe 120 and the strand wire 130 to be fixed.


The method of claim 1,
Screwed to the rear side of the hollow pipe 120 and penetrates through the center hole 141 and the pressure plate 160 of the support block 140 so that the front end of the support block 140 on the locking step 152 to the strand ( Further provided with a tension block 150 for tensioning 130,
The tension block 150 is formed by forming a screw hole 151 through the screw coupled to the hollow pipe 120, and the anchor body, characterized in that formed by forming a rotating nut 153 on the rear side.
Drilling a hole in the slope and injecting the anchor body (100),
Pressing while rotating the anchoring body inserted into the drilling hole cutting edge 116 of the drilling hole to cut the inner periphery of the drilling hole to fix the anchor body 100,
When the anchor body 100 is fixed in the drilling hole, when the rotating nut 153 of the tension block 150 is turned, the tension block 150 caught in the front end of the support block 140 is screwed into the hollow pipe 120. Since moving to the side support block 140 also moves to the rear side anchor body construction method comprising the step of tensioning the strand wire 130 to tension the strand wire 130 coupled to the support block 140.
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