KR101143375B1 - Tunnel construction lock bolt unit having insertion depth control function - Google Patents

Tunnel construction lock bolt unit having insertion depth control function Download PDF

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Publication number
KR101143375B1
KR101143375B1 KR1020090088969A KR20090088969A KR101143375B1 KR 101143375 B1 KR101143375 B1 KR 101143375B1 KR 1020090088969 A KR1020090088969 A KR 1020090088969A KR 20090088969 A KR20090088969 A KR 20090088969A KR 101143375 B1 KR101143375 B1 KR 101143375B1
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KR
South Korea
Prior art keywords
lock bolt
hole
rock
mortar
nut
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KR1020090088969A
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Korean (ko)
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KR20110031636A (en
Inventor
어봉수
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로크산업 주식회사
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Priority to KR1020090088969A priority Critical patent/KR101143375B1/en
Publication of KR20110031636A publication Critical patent/KR20110031636A/en
Application granted granted Critical
Publication of KR101143375B1 publication Critical patent/KR101143375B1/en

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Abstract

The present invention relates to a lock bolt unit for tunnel construction having an installation depth adjustment function, comprising: a lock bolt (10) having a first male thread portion (11) formed at a front end thereof and a second male threaded portion (12) formed at a rear end thereof; A fixing tube 20 inserted into the lock bolt 10 in a hollow shape and having a plurality of fixing protrusions protruding outward; Inserted and fixed from one end of the fixed tube 20, an annular locking portion 31 is formed on one side, while a mortar inlet 32 for injecting mortar into the fixed tube 20 from the locking portion 31 is A hollow mortar injection dome 30 having a through hole 33 through which the rear end of the lock bolt 10 passes; A support washer 40 installed through the mortar injection dome 30 and provided with a mortar outlet 41 on one side to be in close contact with the inner wall surface of the tunnel hole 1 drilled from the rock; A nut 50 fastened to the second male screw part 12 of the lock bolt 10 to fix the mortar injection dome 30 including the support washer 40; A female screw 61 is formed at the center thereof so as to be fastened to the front end of the first male screw portion 11 of the lock bolt 10, and a pressure port 60 having a wide outer end and a rear end of a narrow pyramid shape; A blade piece 72 having a locking protrusion 71 formed on an outer side thereof is formed to cover an outer circumference of the pressing hole 60 so as to correspond to a blade from the rock hole 1 according to the rearward movement of the pressing hole 60. In the lock bolt unit 100 comprising a fastener 70 for supporting the lock bolt by fixing the piece 72,
In order to adjust the installation depth of the lock bolt 10 with respect to the perforated depth of the rock hole 1 on the thread of the second male threaded portion 12, a stop ring 80 having a female thread hole 81 in the center is provided. Fastening tube 20 and lock bolt 10 including the mortar injection dome 30 as a fastening of the nut 50 by being fastened and positioned in the through hole 33 on the locking part 31 side of the mortar injection dome 30. The lock bolt unit is fixedly installed from the rock hole (1) by setting the lock bolt unit to the rock hole by fastening the lock bolt by a nut. By applying the tightening to make the setting in the state of adjusting the depth of the lock bolt into the rock hole, by maintaining the end length of the second bolt portion protruding from the outside in a preferably short form waterproof sheet and a post-process Second job of concrete coating layer work There is an effect that it is possible to proceed in a range that does not cut the extruded length of the helix.
Tunnel, Lock Bolt, Stop Ring, Rock Hole, Nut

Description

Tunnel construction lock bolt unit having insertion depth control function

The present invention relates to a lock bolt unit for tunnel construction, and more particularly, in a lock bolt unit used as a support reinforcement material for a tunnel or underground structure, the depth of the rock hole perforated in the tightening range of the nut finally fastened from the outside. In the lock bolt unit for tunnel construction having the installation depth adjustment function that facilitates the waterproof sheet, shotcrete, and lining reinforcement work that prevents the end of the lock bolt from being drawn out excessively by positioning the installation depth of the lock bolt. It is about.

In general, the lock bolt is fastened to rock structures such as underground structures, tunnels, and the like by a predetermined depth at various angles, and lock bolts are inserted into the perforated holes (hereinafter referred to as rock holes). It is a fixing method. The point where the lock bolt is used is a kind of supporting construction that is inserted into the rock hole in the ground including the rock of the mountain in civil engineering construction, especially tunnel construction, to form bulbs from the inside to reinforce the rock and the interior of the tunnel. to be.

 In general tunnel construction, the rock holes around 36-40mm in diameter and 2m ~ 4m in depth are drilled into the rock around the tunnel, and the lock bolt is inserted in the rock hole to build the tunnel side. There are two methods of adhering the rock to the front end and the front side. On the basis of the bonding method, the two methods are commonly divided into mechanical (wedge), resin and mortar. At this time, the lock bolts are used in various types such as thickness and length depending on the condition of the rock.

As shown in FIG. 1, the lock bolt 10 installed in several rock holes 1 formed in the foundation nut A has a myriad of lock bolts on the inner surface of the foundation tunnel to prevent collapse of the foundation tunnel. Foundation bolt), mesh-shaped mesh body is installed, and as a supplementary reinforcement concrete construction, the reinforcement film of the tunnel is basically formed by the construction of the coating layer (F1, F2) and the waterproof sheet (B) to complete the tunnel. do.

This reinforcement film construction first uses a rock drill or crusher to drill rock holes into which rock bolts will be inserted, and then cement cement mortar and rock bolts into the corresponding rock holes, or lock bolts and then cement mortar. do. When the cement mortar hardens completely, the lock bolts are firmly fixed in the rock. Here, a plurality of lock bolts are installed at predetermined intervals to sufficiently construct the tunnel by sufficiently holding the concrete load sprayed onto the mesh and maintaining the fixed state.

The configuration and construction method of the existing lock bolt unit is disclosed in detail in the Republic of Korea Patent No. 10-0781124 (name of the invention: construction method of the lock bolt unit for tunnel construction) that the applicant has applied for and registered. .

As shown in FIG. 2, the lock bolt unit 100 disclosed in the registered patent includes a lock bolt 10 having a first male thread portion 11 formed at a front end thereof and a second male threaded portion 12 formed at a rear end thereof. )Wow; A fixing tube 20 inserted into the lock bolt 10 in a hollow shape and having a plurality of fixing protrusions protruding outward; Inserted and fixed from one end of the fixed tube 20, an annular locking portion 31 is formed on one side, while a mortar inlet 32 for injecting mortar into the fixed tube 20 from the locking portion 31 is A hollow mortar injection dome 30 having a through hole 33 through which the rear end of the lock bolt 10 passes; A support washer 40 installed through the mortar injection dome 30 and provided with a mortar outlet 41 on one side to be in close contact with the inner wall surface of the tunnel hole 1 drilled from the rock; A nut 50 fastened to the second male screw part 12 of the lock bolt 10 to fix the mortar injection dome 30 including the support washer 40; A female screw 61 is formed at the center thereof so as to be fastened to the front end of the first male screw portion 11 of the lock bolt 10, and a pressure port 60 having a wide outer end and a rear end of a narrow pyramid shape; A blade piece 72 having a locking protrusion 71 formed on an outer side thereof is formed to cover an outer circumference of the pressing hole 60 so as to correspond to a blade from the rock hole 1 according to the rearward movement of the pressing hole 60. Fixing unit 70 includes a fixture 70 for supporting the lock bolt by fixing.

Mortar injection hole 32 of the locking part 31 side of the mortar injection dome 30 is embedded in the rock hole 1 drilled in the basic tunnel A using the lock bolt unit 100 configured as described above. The concrete coating layer (F1) is formed by shotcrete work together with the mesh work in the foundation tunnel (A) in the state where the mortar is injected and hardened into the rock hole (1), and then waterproof on the surface of the concrete coating layer. After the sheet B is attached and the waterproof sheet B is attached, the tunnel is formed by lining the curved surface in the tunnel of the secondary concrete coating layer F2.

A state in which the fixture 70 including the front end side pressing hole 60 of the lock bolt 10 is guided to the end point of the rock hole 1 in each of the rock holes 1 drilled in the basic tunnel A. The nut 50 is fastened to the second male threaded portion 12 of the lock bolt 10, and the step 50 of the nut 50 is provided from a step at which the thread of the second male threaded portion 12 is completed. The lock bolt 10 is rotated at the same time in the screwing direction in a range where the tightening is no longer performed.

The rock hole 1 as an extension of the wing piece 72 of the fastener 70 by causing the pressurization tool 60 fastened from the front end side first male screw portion 11 of the lock bolt 10 to be retracted from the fastener 70. At the same time, the rear end of the lock bolt 10 is fastened by the nut 50 and the mortar injection dome 30 and the support washer 40 are connected to each other. It was fixed at the beginning.

That is, the rear end-side second male threaded portion 12 formed by tightening the front end of the lock bolt 10 has a stepped portion 13 at the boundary portion while forming a short screw portion length of about 30 mm, so that the fastening of the nut 50 is possible. Accordingly, the fastening is easily performed without the backward movement of the lock bolt 10 through the through hole 33 of the mortar injection dome 30.

As described above, the lock bolt 10 prevented the second male thread part 12 from excessively protruding, so that cutting work according to the protruding length could be omitted, which effectively prevented the attachment of the waterproof sheet. There was an advantage to that.

However, the depth of the rock hole in the tunnel may be substantially out of the proper depth for installing the lock bolt unit. The range of tightening of the nut from the second male thread portion having a short thread length of about 30 mm is female. Difficult to install, estimating the depth of installation of the lock bolts with respect to the depth of the counter-hole.

The present invention has been made to solve the conventional problems, in the lock bolt unit used as a support reinforcement of the tunnel or underground structure, the locking range of the nut to be finally fastened from the outside of the lock bolt from the depth of the perforated rock hole The purpose of the installation depth is to prevent the end of the lock bolt is drawn out excessively to facilitate the waterproof sheet, shotcrete, lining reinforcement work leading to the later process.

According to the present invention for achieving the above object, a lock bolt having a first male screw portion is formed at the front end, the second male screw portion is formed at the rear end; A fixing tube inserted into the lock bolt in a hollow shape and having a plurality of fixing protrusions protruding outward; It is inserted and fixed from one end of the fixed tube, an annular locking portion is formed on one side, while a mortar inlet for injecting mortar into the fixed tube is provided from the locking portion, and the through hole through which the rear end of the lock bolt is formed. Mortar injection dome; A support washer installed through the mortar injection dome and provided with a mortar outlet at one side to be in close contact with the inner wall surface of the tunnel of the rock hole drilled from the rock; A nut which is fastened to the second male screw part of the lock bolt to fix the mortar injection dome including a support washer; A female screw formed at a center thereof so as to be coupled to the front end of the first male threaded portion of the lock bolt, and a pressure port having a wide outer end and a rear end having a narrow pyramid shape; In the lock bolt unit configured to include a fastener for supporting the lock bolt to the fixing of the wing piece from the rock hole according to the rearward movement of the pressing hole is provided to correspond to the wing piece is formed on the outer surface in the form of surrounding the outer periphery of the pressing device,

A stop ring with a female threaded hole in the center is fastened to adjust the installation depth of the lock bolt with respect to the drilled depth of the rock hole on the screw thread of the second male threaded portion, and is located in the through-hole of the locking part of the mortar injection dome. By fastening the locking tube including the mortar injection dome as a fastening, the lock bolt is characterized in that the lock bolt unit is fixedly installed from the rock hole.

In addition, the stop ring according to the present invention is fastened to the second male threaded portion of the lock bolt penetrating to the outside of the engaging portion side through hole, the stop ring fastened to the outside lock to the depth of the rock hole as a close coupling support of the nut Characterized in that the combination is adjusted so that the installation depth of the bolt.

In addition, the stop ring according to the present invention is respectively fastened to the second male screw portion of the lock bolt penetrating the inner side of the engaging portion through hole and the outer side of the engaging portion through hole, the stop ring fastened to the outside is in close contact with the nut As the depth of the rock bolt to the depth of the rock hole is characterized in that combined to be adjusted.

In the lock bolt unit according to the present invention, the lock bolt is set by the nut to be set in the rock hole, and the stop bolt is applied to the second male thread of the lock bolt to adjust the depth of entry of the lock bolt into the rock hole. The end length of the second male threaded portion protruding from the outside is preferably kept in a short form by setting the cutting force to the outside. There is an effect that can proceed in the range that does not.

Hereinafter, the lock bolt unit of the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view showing the configuration of the lock bolt unit according to the present invention, Figure 5 is an enlarged perspective view showing the main part according to the present invention, Figures 6 and 7 of the lock bolt unit according to the present invention A partial cross-sectional view showing the fastened state.

The present invention includes: a lock bolt (10) having a first male thread portion (11) formed at a front end thereof and a second male threaded portion (12) formed at a rear end thereof; A fixing tube 20 inserted into the lock bolt 10 in a hollow shape and having a plurality of fixing protrusions protruding outward; Inserted and fixed from one end of the fixed tube 20, an annular locking portion 31 is formed on one side, while a mortar inlet 32 for injecting mortar into the fixed tube 20 from the locking portion 31 is A hollow mortar injection dome 30 having a through hole 33 through which the rear end of the lock bolt 10 passes; A support washer 40 installed through the mortar injection dome 30 and provided with a mortar outlet 41 on one side to be in close contact with the inner wall surface of the tunnel hole 1 drilled from the rock; A nut 50 fastened to the second male screw part 12 of the lock bolt 10 to fix the mortar injection dome 30 including the support washer 40; A female screw 61 is formed at the center thereof so as to be fastened to the front end of the first male screw portion 11 of the lock bolt 10, and a pressure port 60 having a wide outer end and a rear end of a narrow pyramid shape; A blade piece 72 having a locking protrusion 71 formed on an outer side thereof is formed to cover an outer circumference of the pressing hole 60 so as to correspond to a blade from the rock hole 1 according to the rearward movement of the pressing hole 60. In the lock bolt unit 100 comprising a fastener 70 for supporting the lock bolt by fixing the piece 72,

In order to adjust the installation depth of the lock bolt 10 with respect to the perforated depth of the rock hole 1 on the thread of the second male threaded portion 12, a stop ring 80 having a female thread hole 81 in the center is provided. It is fastened and installed in the locking part 31 of the mortar injection dome 30.

The diameter of the through hole 33 is a diameter penetrating the lock bolt 10, the stop ring 80 is a diameter that can prevent the separation to the bottom.

The second male threaded portion 12 of the lock bolt 10 through the stop ring 80 is a reference for determining the length passing through the through hole 33 on the locking portion 31 side.

On the other hand, as an embodiment according to the present invention, Figure 9 is a partial cross-sectional view showing a state in which the stop ring is applied to the lock bolt unit according to the present invention in one embodiment, the stop ring 80 is the engaging portion 31 The stop ring 80 fastened to the second male threaded portion 12 of the lock bolt 10 penetrating to the outside of the side through hole 33 and the outer side of the rock hole 1 is fastened to the nut 50. It is configured by combining so that the installation depth of the lock bolt 10 to the depth of the).

On the other hand, as another embodiment according to the present invention, Figure 10 is a cross-sectional view showing a state in which the stop ring according to the present invention is applied to another embodiment.

The stop ring 80 of the lock bolt 10 penetrates the inside of the through hole 33 of the locking portion 31 side of the mortar injection dome 30 and the outside of the through hole 33 of the locking portion 31 side. Each of the stop rings 80 fastened to the second male threaded part 12 and fastened externally is a lock bolt 10 to a depth of the rock hole 1 as a fastening of the nut 50 to be fastened next. The depth of installation of the combination is configured in combination.

Referring to the operation of the locking bolt unit of the present invention configured as described above is as follows.

Typically, the installation of the lock bolt unit 100 is inserted into the rock hole 1 formed inside the foundation tunnel A, and then the locking bolt 10 is fastened to the first male threaded part 11 at the front end thereof. As a fastening action of the sphere 60, the fastener 70 is expanded so as to be engaged in the rock hole 1. This operation is made in the same manner as in the conventional, in the present invention by the stop ring 80 applied to the second male screw 12 of the lock bolt 10 by adjusting the installation depth according to the entry of the lock bolt (10) It can be installed according to the depth of the rock hole (1).

The entrance of the lock bolt 10 according to the depth of the rock hole 1 is a mortar injection dome 30 passing through the support washer 40 and the lock bolt 10 installed at the position where the rock hole 1 starts. Fastening position of the stop ring 80 fastened to the second male threaded portion 12 of the lock bolt 10, and the end of the second male threaded portion 12 is fastened by the nut 50. When the mortar injection dome 30, the locking portion 31 side of the through-hole 33 is projected to the outside to adjust the length.

That is, the female threaded hole 81 of the stop ring 80 is fastened to the second male threaded portion 12, which stops in the through-hole 33 on the engaging portion 31 side through the inside of the mortar injection dome 30. By the position of the ring 80, it is possible to set the entry length of the lock bolt 10 from the rock hole (1).

In fastening the nut 50 from the end of the second male threaded portion 12, one surface of the nut 50 is in contact with the engaging portion 31 so that the nut 50 does not enter any more, that is, from this time on, the nut 50 Since the through-hole 33 side of the mortar injection dome 30 has a relatively tightening effect corresponding to the stop ring 80, the lock bolt 10 and the fixed tube 20 including the nut 50 The mortar injection dome 30 is rotated at the same time based on the support washer 40.

Rotation of the lock bolt 10 including the above components are fully supported by being held in the rock hole 1 by the expansion of the fastener 70 provided at the tip as in the conventional way inside the rock hole 1 as described above. In the state, the fastening of the nut 50 is no longer made, and the lock bolt unit 100 is in a state where complete fixation is made to the rock hole.

As described above, the fastening of the nut 50 is a second position where the end of the second male threaded portion 12 protrudes outward of the annular engaging portion 31 as the stop ring 80 is installed, as shown in FIG. 7. The length of the male screw portion can be maintained at a relatively short length.

The end portion of the second male threaded portion 12 through the nut 50 is kept constant in such a manner so that cutting operations not allowed by the tunnel construction method using the lock bolt can be omitted.

On the other hand, the installation depth of the lock bolt 10 according to the depth of the rock hole (1) may be set to protrude longer than in FIG.

As shown in FIG. 9 as an embodiment according to the present invention also when the stop ring 80 is fastened to the second male screw portion 12 passed from the outside of the locking portion 31 of the mortar injection dome 30 As described above, the depth of the lock bolt 10 to the depth of the rock hole 1 is determined so that the adjustment of the end of the second male threaded portion 12 of the lock bolt 10 through the nut may protrude constantly. It becomes possible.

This is the nut 50 is in close contact with the stop ring 80 while being fastened from the end of the second male threaded portion 12, and rotated together with the stop ring 80, as described above, the front side fastener of the lock bolt 10 As a method of supporting the rock hole 1 as an extension of the 70, the lock bolt unit 100 can be completely fixed before the mortar is injected into the rock hole 1.

Meanwhile, as shown in FIG. 10 attached as another embodiment according to the present invention, the lock bolt is provided in the second male threaded portion 12 of the lock bolt 10 passing through the mortar injection dome 30. Considering the installation depth of 10, the end ring of the second male thread part 12 is drawn out to the through hole 33 of the mortar injection dome 30 while the stop ring 80 is pre-tightened. Let it be.

Thereafter, another stop ring 80 is fastened from an end portion of the second male threaded part 12 penetrating outside the through hole 33 of the engaging portion 31, and the wire is connected to the stop ring 80. Fastened stop ring 80 is gradually supported relative to the through hole 33 of the engaging portion (31).

That is, the stop ring 80 located at both sides with the through-hole interposed therebetween tightens the nut 50 at the end of the second male threaded portion 12 to the part where the stop ring 80 is located. Given more tightening force, the corresponding stop ring 80 and the nut 50 are fastened to the fixed tube 20 including the lock bolt 10, and the mortar injection dome 30 simultaneously supports the washer 40 on the axis. As the lock bolt 10 rotates, the front end side first male threaded part 11 side fastener 70 is engaged in the rock hole 1 as described above, and the nut 50 is no longer held by the lock bolt 10. The fastening is not made.

In this state, the two stop rings 80 are normally fastened in the nut 50 using hydraulic equipment, and the effect of setting the entered length of the lock bolt 10 more stably and fastening the nut 50. End of the second male threaded portion 12 that has passed through the nut 50 by expanding the fixture 70 by the rotation of the lock bolt 10 according to the installation from the rock hole (1), as described above Maintaining the length in a preferably short form allows the waterproof sheet (B) and the concrete coating layers (F1, F2) to be post-processed in the range of not cutting the protruding length of the second male screw portion as shown in FIG. Will be.

1 is a schematic diagram showing the inside of a typical tunnel,

Figure 2 is a perspective view showing the configuration of a conventional lock bolt unit,

3 is a cross-sectional view showing a locked state of a conventional lock bolt unit,

Figure 4 is a perspective view showing the configuration of the lock bolt unit according to the inventors,

5 is an enlarged perspective view of a main part according to the present invention;

6 is a cross-sectional view showing a locked state of the lock bolt unit according to the present invention;

7 and 8 are a partial cross-sectional view showing a state in which the stop ring is applied to the lock bolt unit according to the present invention,

9 is a partial cross-sectional view showing a state in which the stop ring is applied in FIG.

10 is a cross-sectional view showing a state in which the stop ring according to the present invention is applied in another embodiment.

◎ Explanation of code for main part of drawing ◎

A: Foundation Tunnel 1: Rock Hole

10: lock bolt 11: male threaded part

12: second male thread 20: fixed tube

30: Mortar injection dome 31: Hanging part

33: through hole 40: support washer

50: nut 60: pressure port

70: fixture 80: stop ring

81: female thread 100: lock bolt unit

B: Waterproof sheet F1, F2: Concrete coating layer

Claims (3)

  1. A lock bolt 10 having a first male screw portion 11 formed at a front end thereof and a second male screw portion 12 formed at a rear end thereof; A fixing tube 20 inserted into the lock bolt 10 in a hollow shape and having a plurality of fixing protrusions protruding outward; Inserted and fixed from one end of the fixed tube 20, an annular locking portion 31 is formed on one side, while a mortar inlet 32 for injecting mortar into the fixed tube 20 from the locking portion 31 is A hollow mortar injection dome 30 having a through hole 33 through which the rear end of the lock bolt 10 passes; A support washer 40 installed through the mortar injection dome 30 and provided with a mortar outlet 41 on one side to be in close contact with the inner wall surface of the tunnel hole 1 drilled from the rock; A nut 50 fastened to the second male screw part 12 of the lock bolt 10 to fix the mortar injection dome 30 including the support washer 40; A female screw 61 is formed at the center thereof so as to be fastened to the front end of the first male screw portion 11 of the lock bolt 10, and a pressure port 60 having a wide outer end and a rear end of a narrow pyramid shape; A blade piece 72 having a locking protrusion 71 formed on an outer side thereof is formed to cover an outer circumference of the pressing hole 60 so as to correspond to a blade from the rock hole 1 according to the rearward movement of the pressing hole 60. In the lock bolt unit 100 comprising a fastener 70 for supporting the lock bolt by fixing the piece 72,
    In order to adjust the installation depth of the lock bolt 10 with respect to the perforated depth of the rock hole 1 on the thread of the second male threaded portion 12, a stop ring 80 having a female thread hole 81 in the center is provided. The stop tube 80 is positioned in the through-hole 33 of the locking portion 31 of the mortar injection dome 30 so that the fixing tube 20 includes the mortar injection dome 30 as a fastening of the nut 50. ), A lock bolt unit for a tunnel construction having an installation depth adjustment function, characterized in that the lock bolt unit is fixedly installed from the rock hole (1) by simultaneously rotating the lock bolt (10).
  2. The stop ring (80) of claim 1, wherein the stop ring (80) is fastened to the second male threaded portion (12) of the lock bolt (10) penetrating to the outside of the through hole (33) of the engaging portion (31). Ring 80 is for tightly coupled support of the nut 50 tunnel construction having an installation depth adjustment function, characterized in that combined to adjust the installation depth of the lock bolt 10 to the depth of the rock hole (1) Lock bolt unit.
  3. According to claim 1, The stop ring 80 is made of the lock bolt 10 penetrating the inside of the through hole 33 side of the locking portion 31 and the outside of the through hole 33 of the locking portion 31 side. The stop ring 80, which is fastened to the two external threaded parts 12, and fastened to the outer side, is an intimate fastening support of the nut 50, and the installation depth of the lock bolt 10 is adjusted with respect to the depth of the rock hole 1. Lock bolt unit for tunnel construction having an installation depth adjustment function, characterized in that combined so as to.
KR1020090088969A 2009-09-21 2009-09-21 Tunnel construction lock bolt unit having insertion depth control function KR101143375B1 (en)

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Application Number Priority Date Filing Date Title
KR1020090088969A KR101143375B1 (en) 2009-09-21 2009-09-21 Tunnel construction lock bolt unit having insertion depth control function

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Application Number Priority Date Filing Date Title
KR1020090088969A KR101143375B1 (en) 2009-09-21 2009-09-21 Tunnel construction lock bolt unit having insertion depth control function

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KR101143375B1 true KR101143375B1 (en) 2012-05-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101559892B1 (en) * 2015-04-13 2015-10-14 로크산업 주식회사 Rock-bolt having steel hook fixing member with easy initial fixing of the fore part

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* Cited by examiner, † Cited by third party
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USD779450S1 (en) 2014-10-01 2017-02-21 Samsung Electronics Co., Ltd. Portable electronic device
USD781275S1 (en) 2014-10-01 2017-03-14 Samsung Electronics Co., Ltd. Portable electronic device
USD785586S1 (en) 2014-10-01 2017-05-02 Samsung Electronics Co., Ltd. Portable electronic device
USD797713S1 (en) 2014-10-01 2017-09-19 Samsung Electronics Co., Ltd. Portable electronic device
USD803818S1 (en) 2014-10-01 2017-11-28 Samsung Electronics Co., Ltd. Portable electronic device
USD795855S1 (en) 2014-10-01 2017-08-29 Samsung Electronics Co., Ltd. Portable electronic device
USD779449S1 (en) 2014-10-01 2017-02-21 Samsung Electronics Co., Ltd. Portable electronic device
USD784972S1 (en) 2014-10-01 2017-04-25 Samsung Electronics Co., Ltd. Portable electronic device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0925636A (en) * 1995-07-10 1997-01-28 Yokouchi Kogyo:Kk Reinforcement suspension frame
JP2007031974A (en) * 2005-07-22 2007-02-08 Nippon Chutetsukan Kk Anchoring bolt protector
KR100781124B1 (en) * 2006-07-04 2008-01-11 나우이엔지 (주) A fixing method of rock bolt unit for tunnel construction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0925636A (en) * 1995-07-10 1997-01-28 Yokouchi Kogyo:Kk Reinforcement suspension frame
JP2007031974A (en) * 2005-07-22 2007-02-08 Nippon Chutetsukan Kk Anchoring bolt protector
KR100781124B1 (en) * 2006-07-04 2008-01-11 나우이엔지 (주) A fixing method of rock bolt unit for tunnel construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101559892B1 (en) * 2015-04-13 2015-10-14 로크산업 주식회사 Rock-bolt having steel hook fixing member with easy initial fixing of the fore part

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