KR20080086157A - Cement mortar outflow prevention-stopper and lock bolt construction work, using the stopper - Google Patents

Abstract

A stopper device for preventing the outflow of cement mortar when installing a rock bolt to an auxiliary support of a tunnel or bedrock of an excavation plane, and a construction method of a rock bolt using the stopper device are provided to reuse a stopper device repeatedly by rotating backward using a polygonal bolt of a stopper device and to secure economical efficiency, workability, safety and constructability. A stopper device(101) for preventing the outflow of cement mortar when installing a rock bolt to an auxiliary support of a tunnel or bedrock of an excavation plane includes a cylindrical body perforated vertically, a polygonal bolt(110) formed on one side of the outer circumferential surface of the cylindrical body, a conic body formed on one side of the outer circumferential surface of the cylindrical body and narrowed obliquely, a flange(109) formed between the polygonal bolt and the conic body, many multi-stage hanging projections(106) for idle running prevention formed on the end of the conic body, an expansion filler(107) formed on one side of the stopper device to fit tightly, a male thread(111) formed on the outer circumferential surface of the conic body, and a female thread(108) formed on the inner circumferential surface to engage with the male thread of the rock bolt. A construction method of a rock bolt using the stopper device comprises the steps of: perforating an insertion hole for a rock bolt to a rock wall; injecting cement mortar to the perforated hole; fastening a male thread of a rock bolt with a female thread of a stopper device integrally; pushing the rock bolt attached with the stopper device to the perforated hole of the rock wall manually; attaching a rotary machine to the backside of the rock bolt; preventing the idle running of the stopper device by multi-stage hanging projections and a male thread with the rotary insertion of a rock bolt; fitting the stopper device to the hole tightly with the male thread by rotating the stopper device using a polygonal bolt; rotating the polygonal bolt of the stopper backward and removing the stopper device before the mortar is hardened; anchoring a pressure plate to the rock bolt and completing the construction of a rock bolt; and recycling the removed stopper device for preventing the outflow of cement mortar.

Description

Cement mortar outflow prevention-stopper and Lock bolt construction work, using the stopper}

1 is an explanatory diagram showing a conventional lock bolt construction method.

2 is to buried the conventional cement mortar falling prevention device to construct a lock bolt

       Cross section showing how to.

   Figure 2-1 shows a conventional cement mortar anti-flow cap (mortar cap for lock bolt:

       Registration number: 20-0316682).

  Figure 2-2 is a buried conventional lock bolt fixture (registration number: 10-0383451)

           Cross-section.

  2-3 shows a conventional lock bolt fixing stopper (Registration No .: 20-0305706)

           Sunk section.

Figure 3 is a cement mortar spill prevention used in the rock bolt construction method of the present invention

       A perspective view of the closure device.

Figure 4 is a cement mortar spill prevention to be used in the rock bolt construction method of the present invention

       Sectional drawing showing the stopper.

5 is a cross-sectional view taken along the line A-A of FIG. 4 of the present invention.

Figure 6 is a process chart showing the lock bolt construction method of the present invention.

7 to 15 is a cement mortar spill prevention plug device and lock bolt using the same

    As sectional drawing which showed the construction process in order,

7 is a state in which the rock bolt installation hole is drilled in the rock wall,

8 is a state of filling the cement mortar using a cement mortar filling hose,

9 is a male screw of a lock bolt and a female screw of a cement mortar leakage preventing plug device.

       In a state of being united together

10 is a lock bolt equipped with a cement mortar leakage preventing device of FIG.

        Manually pushed into the drill hole,

11 is a state in which the rotating machine is mounted on the back of the lock bolt,

12 is a state in which the lock bolt is inserted while operating the rotating machine,

Figure 13 is a male screw outer peripheral surface by rotating the stopper device using a multi-head bolt after the hammer

        Stuck in the hole by the mountains,

14 is a cement mortar spill stopper for recycling before cement mortar hardens

        Using the device's multiple bolts to reverse the removal,

15 is a lock bolt construction by fastening the fixing plate and the fixing nut to the lock bolt

        Completed.

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

    10: conventional lock bolt fixture

   102: conventional lock bolt fixing stopper

   310: conventional cement mortar leakage prevention cap

   101: cement mortar spill prevention device of the present invention.

   106: multi-stage locking jaw. 107: stretch filling material

   108: female screw part. 109: flange.

   110: polygonal bolt 111: outer thread surface male thread 112: release mortar scattering

   135: rotating machine 300: rock wall. 302: drilling hole

   304: cement mortar. 306: rock bolt. 307: male thread.

   308: tightening nut 309: acupressure plate

   312: injection hose 400: cement mortar flows down.

   401: pore generation.

The present invention relates to a cement mortar outflow stopper device and a method for constructing a lock bolt using the same in installing a lock bolt in a tunnel auxiliary support or an excavated rock face, and more specifically, a cylindrical body which is perforated both up and down is formed. A polygonal bolt 110 is formed on one side of the outer peripheral surface of the cylindrical body, and a conical body narrowing inclined width is formed on the other side of the outer peripheral surface of the cylindrical body, and a flange 109 is formed between the polygonal bolt 110 and the conical body. And, a plurality of anti-locking locking jaw 106 is formed at the end of the conical body, the elastic filler material 107 is formed on the one side of the stopper device can be tightly formed, the male thread (111) on the outer peripheral surface of the conical body The inner circumferential surface has a spiral female screw portion 108 formed in a line in the circumferential direction so as to be engaged with the male thread 307 of the lock bolt 306. It consists of a device that is integrally coupled with the bolt (306).

In general, in the tunnel drilling or vertical excavation, in order to prevent the rock wall 300 from collapsing, the rock drilling hole 302 is formed by drilling deep into the rock deep portion to form the rock drilling hole.

After the cement mortar (hereinafter referred to as 'mortar mortar') is injected into it, the lock bolt 306 is inserted and the filling mortar 304 is hardened to fix the pressure plate 309 and fix it with the fastening nut 308. To stabilize the rock and do construction.

Referring to Figure 1 outline the general lock bolt construction method,

As shown in (a), the hole for the lock bolt 306 is inserted into the tunnel rock wall 300 is drilled. Then, the mortar 304 is filled into the hole 302 which is punched out as shown in (b) using a mortar 304 injector, and the lock bolt 306 is inserted into the mortar filled hole 302 as shown in (c). Insert manually or mechanically. After the lock bolt 306 is completely inserted into the hole 302 as shown in (d) and the mortar 304 is completely hardened, the pressure plate 309 is installed to fix the fastening nut 308 to fix the rock wall 300 if necessary. Complete the construction of the lock bolt.

In this case, that is, when the lock bolt 306 is inserted after the mortar 304 is injected, the mortar flows due to the mortal flow of more than half of the upper section of the tunnel.

In the case of the top end of the tunnel, the mortar erupted (400), there was a problem of a safety accident such as the real name of the worker.

In order to solve this problem, a lock bolt fixing stopper device (utility model application No. 2020020034670) for preventing cement mortar leakage has been devised by the present applicant, and as shown in FIG. Although the mortar 304 was filled in the hole 302 or the lock bolt 306 was driven using the bolt fixture 10,

This method is uneconomical because it leaves the fixing stopper 102, the prevention cap 310, and the fastener 10 in the drilling hole 302 (buying).

 The conventional lock bolt construction method using the prevention cap 310 has the following problems.

1. In the drilling of the drilling hole 302 in the rock wall 300, in most of the characteristics of the workpiece called the rock wall 300, the diameter of the desired hole, i.e., larger than the hole according to the design value, is largely prevented. Since the diameter of the cap 310 is fixed, various problems occur when applied to actual construction. That is, when the diameter of the hole 302 is larger than the designed value, the prevention cap 310 is loosely fitted into the rock wall 300 drilling hole 302 so that the setting is not performed properly.

Contrary,

When the diameter of the hole 302 is smaller than the designed value, since the prevention cap 310 is forcibly fitted to the drilled hole 302 of the rock wall 300, the setting is difficult and the workability is significantly reduced.

2. When filling the mortar 304 using the conventional prevention cap 310, the injection hose

Since the length of the 312 is short, the mortar 304 is injected from the outer side of the perforation hole 302, at which time the vacuum is injected by the mortar 304 initially injected into the hole 302 by the mortar 304 initially injected. It is in a state where air can't escape and it causes bubbles. This bubble generation phenomenon can not securely support the lock bolt 306, which causes the secondary hole.

3. In the state of completion of construction using the conventional prevention cap 310, due to the generation of bubbles, the mortar 304 is not secured, so that the lock bolt 306 falls out of the hole 302 and falls off. Frequent accidents and frequent reconstructions resulted in poor workability.

4. The conventional method of constructing the lock bolt 306 using the prevention cap 310 is uneconomical by leaving the prevention cap 310 and the injection hose 312 in the drilling hole 302 as it is (burying). .

The construction method by the conventional lock bolt fixture 10 developed to solve the problem of the prevention cap 310 has the following problems.

1. The inner protrusions 16 of the lock bolt fixture 10 are not interlocked with the external thread 307 of the lock bolt 306 and a gap is generated so that the mortar 304 cannot prevent leakage, and the tunnel The mortar 304 directly dropped during the construction of the ceiling, so that safety such as blindness of the eyes of the skilled worker could not be secured.

2. The conventional method of constructing the lock bolt 306 by using the fastener 10 is uneconomical by leaving the fastener 10 in the drilling hole 302 as it is (burying).

The conventional lock bolt fixing stopper 102 is also provided between the fixing projection and the drilling hole.

It was not possible to completely block the flow of cement mortar due to the occurrence of gaps, and it was uneconomical as it was left in the perforation hole 302 (buying).

The present invention has been invented to solve this problem in view of the above conventional problem,

The upper and lower perforated cylindrical body is formed, the polygonal bolt 110 is formed on one side of the outer peripheral surface of the cylindrical body, the conical body is narrowly narrowed to the other side of the outer peripheral surface of the cylindrical body is formed, the polygonal bolt 110 And a flange 109 is formed between the conical body and a plurality of anti-idling fastening jaws 106 are formed at the ends of the conical body, and the elastic filling material 107 that can act as a terminal tightly on one side of the closure device is formed. A male thread 111 is formed on the outer circumferential surface of the conical body, and a spiral female screw portion 108 is formed in the circumferential direction on the inner circumferential surface so as to be engaged with the male thread 307 of the lock bolt 306. By using a stopper device 101 composed of a device that is integrally coupled with the lock bolt 306, it appropriately corresponds to various sizes of the holes for inserting the lock bolt 306, and no bubbles are generated when the mortar 304 is injected. A full filling can be realized without inserting the lock bolt 306 into the rotary machine 135. The remaining lock mortar 304 of the lock bolt 306 volume is scattered along the circumference and discharged to the outside 112. When the lock bolt 306 is installed in the tunnel end part, the safety of the skilled worker is solved. As shown in FIG. 14, the mortar 304 completely hardens, and then the stopper device 101 that has completed the function is a polygonal bolt 110 of the stopper device 101. Its purpose is to provide a cement mortar spill prevention stopper and a lock bolt construction method using the same so that it can be repeatedly used after being removed by reverse rotation.

An embodiment of the present invention for achieving the object as described above looks at with reference to the accompanying drawings.

3 is a perspective view showing a cement mortar leakage preventing plug device when the lock bolt 306 is inserted in accordance with the present invention, Figure 4 is a half sectional view showing a cement mortar leakage preventing plug device of the present invention, Figure 5 is the present invention 7 to 15 are state cross-sectional views illustrating a process in which cement mortar is filled in the drilling hole and the lock bolt is inserted by the lock bolt cement mortar leakage preventing plug device of the present invention.

In order to achieve the purpose of preventing the mortar 304 leak of the present invention, the stopper device 101 according to the present invention is formed with a cylindrical body perforated both up and down, the polygonal bolt 110 is formed on one side of the outer peripheral surface of the cylindrical body, A conical body narrowing inclined width is formed on the other side of the outer peripheral surface of the cylindrical body, a flange 109 is formed between the polygonal bolt 110 and the conical body, a multi-stage locking step for preventing a plurality of idle at the end of the conical body. ) Is formed, and the elastic filler 107 is formed on one side of the stopper device can be tightly clamped to the end, a male thread 111 is formed on the outer peripheral surface of the conical body, the number of lock bolts 306 on the inner peripheral surface In order to engage the thread 307, a spiral female threaded portion 108 is formed line by line in the circumferential direction.

In the above configuration, as the lock bolt 306 is integrally engaged with the spiral female threaded portion 108 of the closure device 101 and the male thread 307 of the lock bolt 306, the lock bolt 306 is engaged. There is no fear that the stopper is separated from the stopper device 101, the multi-stage locking jaw 106 and the outer peripheral surface male thread 111 formed at the end of the circumference prevents idling by the pinching action when rotating the lock bolt 306, As the end of the capping device, the elastic filler material 107 and the male thread 111 are formed on the outer circumferential surface, so that the hammer hits (not shown) and rotates (uses a polygonal bolt) to be pinched in the hole. The lock bolt is prevented from falling out, and the flange 109 of the plugging device can protect the functional worker by allowing the cement mortar to be scattered and released 112 during the construction of the tunnel top. The male thread and the plugging device 101 of the lock bolt 306 can be protected. The stopper is the opening of the drill hole (302) Blocking lock bolt (306) in the presence of doemeuro advance the full charge of the mortar (304) is possible.

Filling the cement mortar 304 in the drilled hole 302 of the rock wall 300 of the tunnel by using the cement mortar outflow stopper 101 of the present invention configured as described above to insert the lock bolt 306, etc. Look at the lock bolt construction method with reference to Figures 7 to 15.

First, the hole 302 is drilled into the rock wall 300 as shown in FIG. 7, and then the injection hose 312 is inserted into the hole 302 as shown in FIG. Charge the mortar 304.

When the mortar 304 is completely filled as described above, the mortar 304 injection hose 312 is removed and the stopper device 101 is fastened to the lock bolt 306 as shown in FIG. 9. As shown in FIG. 9, the lock bolt 306 equipped with the mortar leakage stopper fastened as shown in FIG. 9 is manually inserted into the drilling hole 302 filled with the mortar 304, and then the rotary machine 135 is mounted as shown in FIG. 11.

As shown in FIG. 12, the lock bolt 306 is rotated by the rotary machine 135 to push deep into the hole 302 in which the mortar 304 is filled.

At this time, the multi-stage locking step 106 and the male thread 111 of the outer circumferential surface of the cylindrical body end to prevent the idling of the stopper device 101 when driving the lock box 306 by the rotational force of the rotary machine 135. Since the lock bolt 306 and the stopper device 101 are reversed in rotational directions, such as the male screw and the female screw relationship of the bottle cap and the bottle spout, the stopper device 101 is drilled without being separated. 302 is fixed to the inlet to prevent the leakage of mortar 304 and only the lock bolt 306 is inserted to the end of the drilling hole (302).

At this time, the remaining mortar 304 as much as the volume of the lock bolt 306 inserted is released from the gap between the flange 109 and the opening of the hole 302. The mortar 304 is scattered and released 112, thereby affecting the operator. There is no risk of a safety accident as it does not give a warning.

Finishing the construction process as described above, when rock bolt construction to the top end of the tunnel as shown in Fig. 13 hitting the hammer to the end of the lock bolt 306 (not shown) and then rotating the stopper device (using a multi-face bolt) lock bolt 306 Do not fall by the weight.

At this time, the expansion filler 107 and the outer peripheral surface male thread 111 of the stopper device 101 has a tight clamping function.

Before the mortar 304 which is filled in the drilling hole 302 is hardened by using the polygonal bolt 110 of the plug device 101 as shown in FIG. 101) can be recycled,

As shown in FIG. 15, the pressure plate 309 and the fixing nut 308 are fixed to the exposed end of the lock bolt 306 to complete the construction of the lock bolt 306.

In addition, the construction method using the cement mortar spill prevention plug device to achieve the above object

Drilling a lock bolt insertion hole in the rock wall (S100);

Injecting cement mortar into the drilling hole (S101);

(S102) fastening integrally with the male screw of the lock bolt and the female screw of the plug device;

Manually pushing the lock bolt on which the stopper is mounted into the rock wall drilling hole (S103);

Mounting the rotating machine on the rear of the lock bolt (S104);

Preventing idle rotation of the stopper device by the multi-stage locking step and the outer peripheral surface male thread when the lock bolt rotation insertion (S105);

Rotating the stopper (using a multi-bolt bolt) secures the stopper to the hole by external thread

Pinching step (S106);

Before the mortar hardens, turn the stopper by using reverse bolts.

Removing step S107;

Fixing the acupressure plate to the lock bolt to complete the lock bolt construction (S108);

Recycling the removed cement mortar spill prevention device (S109); It consists of.

According to the present invention configured as described above, since the closure device 101 blocks the inlet of the drilling hole 302 by the male screw relationship of the lock bolt 306 and the female screw connection of the closure device 101, the mortar 304 is completely removed. There is an effect to realize the filling,

The multi-stage locking step 106 and the male thread 111 of the outer circumferential surface provided at the end of the cylindrical body is to suppress the stopper device idle rotation when the lock bolt is rotated by the rotary machine 135 (by pinching or locking action ), In the case of the top end of the tunnel, after the insertion of the lock bolt 306 after the insertion of the lock bolt 306 with a hammer (not shown), when the stopper is rotated, the elastic filler material 107 contracts and the male thread (111) of the outer circumferential surface. It is tightly locked by the lock bolt (306) has the effect of being fully fixed,

In the case of the tunnel top part, as much as the volume of the mortar 304 into which the lock bolt 306 is inserted is discharged 112 while being scattered (spreaded) by the stopper 101 and the flange 109, so that it does not affect the operator. It is effective in preventing safety accidents such as worker's blindness.

By using the polygonal bolt 110 of the stopper device 101 that has fulfilled the function of reverse rotation, the cement mortar leakage prevention stopper 101 is repeatedly recycled, and thus it is more economical technology than the investment method of the installation method of the stopper device according to the related art.

Claims (3)

The upper and lower perforated cylindrical body is formed, the polygonal bolt 110 is formed on one side of the outer peripheral surface of the cylindrical body, the conical body is narrowly narrowed to the other side of the outer peripheral surface of the cylindrical body is formed, the polygonal bolt 110 And a flange 109 is formed between the conical body and a plurality of anti-idling fastening jaws 106 are formed at the ends of the conical body, and the elastic filling material 107 that can act as a terminal tightly on one side of the closure device is formed. A male thread 111 is formed on the outer circumferential surface of the conical body, and a spiral female screw portion 108 is formed in the circumferential direction so as to engage with the male thread 307 of the lock bolt 306 on the inner circumferential surface thereof. Cement mortar outflow stopper device of the lock bolt, characterized in that 101. According to claim 1, The upper and lower perforated cylindrical body is formed, a conical body narrowing inclined width is formed on the other side of the outer circumferential surface of the cylindrical body, a flange 109 is formed on the upper surface of the conical body, a plurality of multi-stage for preventing idle Hanging jaw 106 is formed, the elastic filling material 107 that can act tightly to the end of one end of the stopper device is formed, the male thread 111 is formed on the outer peripheral surface of the conical body, lock bolt ( Lock bolt cement mortar spill prevention device 101, characterized in that the spiral female screw portion 108 is formed in a row in the circumferential direction to engage the male thread 307 of the 306. By using the cement mortar spill prevention device of claim 1 Drilling a lock bolt insertion hole in the rock wall (S100); Injecting cement mortar into the drilling hole (S101); Integral connection with the male bolt of the lock bolt and the female screw of the stopper Step S102; Manually inserting the lock bolt with the stopper into the rock hole Step S103; Mounting the rotating machine on the rear of the lock bolt (S104); When inserting the lock bolt rotation, the stopper device can be Preventing idling (S105); Rotating the stopper (using a bolt), the stopper is Squeezing the hole tightly (S106); Before the mortar hardens, turn the stopper by using reverse bolts. Removing step S107; Fixing the acupressure plate to the lock bolt to complete the lock bolt construction (S108); Recycling the removed cement mortar spill prevention device (S109); in Cement mortar outflow stopper device characterized in that configured Rock bolt installation method.

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