JPH09184400A - Self-drilling bolt - Google Patents

Self-drilling bolt

Info

Publication number
JPH09184400A
JPH09184400A JP35438195A JP35438195A JPH09184400A JP H09184400 A JPH09184400 A JP H09184400A JP 35438195 A JP35438195 A JP 35438195A JP 35438195 A JP35438195 A JP 35438195A JP H09184400 A JPH09184400 A JP H09184400A
Authority
JP
Japan
Prior art keywords
self
rod
drilling
pipe
bolt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP35438195A
Other languages
Japanese (ja)
Other versions
JP3251485B2 (en
Inventor
Tatsuo Kosaka
Keisuke Nakagaki
圭介 中垣
龍夫 小坂
Original Assignee
Katetsukusu:Kk
株式会社カテックス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Katetsukusu:Kk, 株式会社カテックス filed Critical Katetsukusu:Kk
Priority to JP35438195A priority Critical patent/JP3251485B2/en
Publication of JPH09184400A publication Critical patent/JPH09184400A/en
Application granted granted Critical
Publication of JP3251485B2 publication Critical patent/JP3251485B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

(57) [Abstract] [Purpose] Rock-supporting member and artificial injection material for reinforcement of artificial or natural slopes and wall surfaces, especially for prevention of collapse of tunnel tops, facets, etc. The self-drilling bolt that also has the filling function of is provided with corrosion resistance and ease of cutting. [Structure] The rod 2 is made of a fiber-reinforced thermosetting resin, and a rod-shaped rod 2 is provided with a drilling crown at its tip and a base end can be connected to a drilling machine and an injecting machine so that the rod 2 is resistant to corrosion. It is easy to handle, store and transport due to its light weight and lightness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial or natural slope, reinforcement of a wall surface, and in particular, a rock support member for preventing collapse of the top end of a tunnel, face, etc., and skin loss. The present invention relates to a self-drilling bolt that also has a filling function of injection material.

[0002]

2. Description of the Related Art Conventionally, as a rock bed supporting member,
In rock stabilization methods such as the conventional method using rock bolts and the NATM method, an insertion hole is drilled at the top end of the tunnel during excavation by an impact punch or a rotary punch with a drill rod. At the same time, after the boring rod is pulled out, the injection material is filled into the insertion hole and the supporting member is inserted.However, if such a construction method is applied to soft rock, the boring rod can be inserted when pulling out the boring rod. Since the wall surface of the provided hole collapses, it is impossible to insert the support member after that.

Therefore, a supporting member, a so-called self-drilling bolt, has been developed which is capable of filling the injection material into the insertion hole while leaving the drilling rod mounted on the drilling machine on the rock mass. In this case, since a drill crown is attached to the tip of the steel pipe and it is possible to connect to the drilling machine and the pouring machine at the base end, it will not corrode due to water in the bedrock and other constituents. It had an easy drawback.

When the safety of the space is temporarily exhibited on the wall surface of the tunnel and the wall surface is torn down thereafter, for example, the wall surface of the pilot tunnel which is surely widened in the subsequent process, the mirror stopper, etc. are made of steel. I couldn't use self-drilling bolts.

Further, if it is used, since the bolt is hard, it takes a long time for the excavation work, and the excavation tip at the tip of the excavator is extremely damaged, resulting in high cost. Moreover, the cutting pieces of the bolts have caused damage to the earth and sand carrying conveyor, and have caused operation stoppages and failures.

[0006]

SUMMARY OF THE INVENTION The present invention provides a self-drilling bolt having corrosion resistance and easiness of cutting.

[0007]

According to the present invention, a steel self-drilling bolt having both a drilling function and an injection material injection function, which is based on the above-mentioned prior art, is difficult to cut, and the wall surface of a pilot tunnel, a mirror stop, etc. In consideration of the problems that cannot be used for the pipe, the screw crown of the rod end made of the fiber-reinforced thermosetting resin having the linear and spiral glass fibers in the wall thickness of the pipe made of the thermosetting resin. It has corrosion resistance and easiness to cut by connecting the screw part at the base end to the punching machine and the pouring machine, and the rod cutting piece itself is soft and does not adversely affect the earth and sand carrying conveyor. The object is to solve the above-mentioned problems by making it extremely lighter than a self-piercing bolt made of steel that does not affect and has the same tensile strength to facilitate handling, storage and transportation.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 is a self-drilling bolt used for drilling rock mass and fixing it by leaving it in the drill hole. The self-drilling bolt 1 is made of a fiber-reinforced thermosetting resin, and threaded portions 3 and 4 are formed on the outer peripheral portions of both ends of a pipe-shaped rod 2 having an injection passage 2a extending in the central longitudinal direction.
While attaching the drilling crown 5 to the screw part 3 on the tip side,
The screw part 4 on the base end side is connected to a punching machine or an injection machine (not shown).

The rod 2 is made of a thermosetting resin such as polyester or epoxy resin, and is formed in the wall thickness of a pipe 6, and innumerable straight glass fibers 7 oriented in the longitudinal direction of the pipe 6,
7a and the innumerable spiral glass fibers 8, 8a ... In the opposite direction to the spiral direction of the screw parts 3, 4, and the spiral glass fibers 8, 8a. , Which are unevenly distributed in the outer region, the spiral glass fibers 8, 8a ... May be arranged in the inner region of the straight glass fibers 7, 7a.

Further, each of the screw parts 3 and 4 is a round screw having rounded peaks and valley bottoms, and is formed by pressing before hardening of the thermosetting resin constituting the pipe 6 when the rod 2 is manufactured. I have to.

The material of the pipe 6 is not limited to the thermosetting resin, but may be a hardened synthetic resin having a predetermined strength. Based on this, the material of the rod 2 is also limited to the fiber reinforced thermosetting resin. Not done.

Further, a pair of metal forming plates 9 and 9a are externally fitted to the outer periphery of the screw portion 4 on the base end side to laminate and form the reinforcing layer 10,
The metal forming plates 9 and 9a are formed by dividing a cylindrical material in which a round screw is formed by threading into two.
A large number of small holes 11, 11a ... Are formed in the valley bottom of 9a, and after the metal forming plates 9, 9a are set at the both ends of the rod 2 when the rod 2 is manufactured, the resin is eroded from the small holes 11, 11a. After protruding, the relevant portion is abraded and the metal forming plate 9 is attached to the rod 2.
9a is integrated.

Further, a metal pipe body 12 is inserted in the rod 2 at the base end side of the injection passage 2a, and a flange portion 13 is provided around the outer peripheral portion of the pipe body 12 at the base end side. The collar portion 13 is in contact with the base end surface of the rod 2.

Further, the screw portions 3 and 4 may be formed on the outer peripheral surface of the sleeve 14 which is externally fitted and integrated with both ends of the pipe 6, and the sleeve 14 is made of fiber reinforced thermosetting resin like the rod 2. Further, the reinforcing layer 10 composed of the metal forming plates 9 and 9a may be laminated, or may be made of metal.

In addition, the drill hole crown 5 attached to the tip of the rod 2 is provided with a screw hole 15 corresponding to the screw portion 3 and an ejection hole 17 opening at the excavation surface 16.

Reference numeral 18 is for attaching the rod 2 to a punching machine or the like.
This is a sleeve for connecting the rod 2 of the book, and the sleeve 18 is made of the same fiber reinforced thermosetting resin as that of the rod 2 or made of metal, and has screw holes corresponding to the screw portions 3 and 4 in the center.
19 are installed.

Next, the operation of the self-drilling bolt according to the present invention will be described. First, the drill crown 5 is screwed into the threaded portion 3 on the tip side of the rod 2 and attached to the threaded portion 4 on the proximal end side of the rod 2. The sleeve 18 is screwed and mounted, and the base end of the rod 2 is screwed up to half of the screw hole 19, and the screw shaft portion (not shown) of the punching machine is inserted from the base end side of the screw hole 19 in the sleeve 18. ) Is screwed in and the self-piercing bolt 1 is mounted on the punching machine.

Then, the boring machine is started to carry out the boring work with the self boring bolt 1 while ejecting the cleaning fluid such as air or water from the ejection hole 17 through the injection path 2a.

The self-drilling bolt 1 in the rotating state is radially compressed by the spiral glass fibers 8, 8a ... When transmitting the rotational moment acting in the spiral direction of the screw portions 3, 4 of the rod 2. By doing so, the strength of the rod 2 against torsion and pressure can be further increased.

When another rod 2 is added to the self-drilling bolt 1, the screw shaft of the punching machine is removed from the sleeve 18 and the punching machine is pulled back, and the tip of the other rod 2 is screwed into the screw hole of the sleeve 18. While screwing into 19 and another sleeve 18 is screwed into the base end and mounted, the screw shaft portion of the punching machine is screwed into the screw hole 19 of the other sleeve 18 to continue the drilling work. .

After completion of the boring work, the self-drilling bolt 1
The drilling machine and the outer sleeve 18 are removed from the base end, and a pouring machine (not shown) is connected to the base end of the self-drilling bolt 1, and the pouring material is inserted through the pouring path 2a by the pouring machine. Press in.

Then, a primary lining, that is, mortar spraying, is applied to the surface of the natural ground, and subsequently, supporting work such as arched steel frame is applied, and then a secondary lining is applied.

Further, the injection material is filled between the self-drilling bolt 1 and the insertion hole according to the present invention, and the injection material is adapted to the surface of the self-drilling bolt 1 so that it is firmly integrated with the self-drilling bolt 1. The drilling bolt 1 and the natural ground are strongly integrated, and the self-drilling bolt 1 integrated with the natural ground suspends and holds the top end.

Further, as shown in FIG. 8, in a tunnel T, which is planned to be widened like a pilot tunnel, if the ground M is stabilized by the steps similar to the above on the wall surface and then excavated, it will collapse. It is possible to excavate without skin loss.

Further, as shown in FIG. 9, the tunnel T being excavated.
In the method of mirror-fixing the cutting face K at the tip, if the cutting face K is subjected to the same steps as above to stabilize the natural ground M and then excavate,
Excavation is possible without falling or skin loss.

The above construction method is realized by the fact that the self-drilling bolt 1 embedded in the ground M can be easily cut by an excavator, and the drill crown 5 and the reinforcing layer 10 are made of metal. Since their ratio to the whole self-drilling bolt 1 is extremely small, it does not hinder the excavation work.

Further, the use object of the self-drilling bolt 1 of the present invention is not limited to the tunnel excavation method described above, and for example, to stabilize an artificial wall surface in an underground space, or an artificial or natural wall surface, a slope. In short, it is used for all construction methods that stabilize the bedrock.

[0028]

In summary, according to the present invention, the drilling crown 5 is mounted on the distal end side and the proximal end side is connected to the punching machine or the pouring machine. Instead, it is possible to perform the filling work of the injection material by removing the punching machine and connecting the injection machine.

Further, in the wall thickness of the pipe 6 made of a cured resin, there are innumerable linear glass fibers 7, 7a ... And spiral glass fibers 8, 8a. Since the threaded portions 3 and 4 are formed on the outer peripheral portions of both ends of the hardened resin rod 2, the self-drilling bolt 1 has a large tensile strength and is easily cut and cut. Even if the bolt 1 is embedded, it can be easily cut with an excavator, and the effect on reinforcement of the tunnel excavation slope and mirror stop construction method is great, and it is stable ground that does not collapse during such work Since the excavation is performed after that, the safety of the tunnel construction method can be improved in combination with stably suspending and holding the top end portion by the self-drilling bolt 1.

Further, the self-drilling bolt 1 according to the present invention is firstly excellent in corrosion resistance as compared with that made of steel having the same tensile strength, so that the service life is semipermanent. In addition to being able to be used in places with intense spring water, and secondly, being extremely lightweight, it is possible to improve handleability and, therefore, as a lock bolt or suspension bolt in the NATM method. The function can be fully exerted.

Further, since the screw parts 3 and 4 are round screws having rounded peaks and valley bottoms, dust, sand dust, injection material and the like can be easily attached and detached even if they are caught in the screw parts 3 and 4.

Further, since the spiral direction of the spiral glass fibers 8, 8a ... Is set to be opposite to the screw parts 3 and 4, in the rotating self-drilling bolt 1, the screw parts 3 and 4 of the rod 2 are provided. When transmitting the rotational moment acting in the spiral direction, the spiral glass fibers 8, 8a are compressed in the radial direction and the strength of the rod 2 is improved.
Since the spiral glass fibers 8, 8a ... Are unevenly distributed in the outer region of the pipe 6, the rod 2 of the self-drilling bolt 1 in the rotating state has the spiral glass fibers 8, 8a near the outer peripheral surface. By the compression in the radial direction by ..., the strength of the rod 2 can be further improved, so that the impact force of the impact punch machine is not attenuated by the drilling crown 5 at the tip of the self-piercing bolt 1. It can be transmitted and the efficiency of drilling work can be improved.

Further, since the metal reinforcing layer 10 is formed on the outer periphery of the screw portion 4 on the base end side, the self-drilling bolt 1 is particularly suitable for the impact punching machine.
When mounting and working, the tip of the self-drilling bolt 1 is in contact with the tip side of the insertion hole, so a strong compressive force acts on the base end of the rod 2, which is the connection part with the percussion punch. ,
Since the portion is reinforced by forming the reinforcing layer 10, it is possible to prevent buckling damage at the base end portion of the rod 2, and further, the reinforcing layer 10 is provided with small holes 11, 11a. Since it is formed, the cured resin forming the pipe 6 has small holes 11,
Since it penetrates into 11a ..., the integrity of the reinforcing layer 10 to the rod 2 can be improved.

Further, a metal pipe body 12 is inserted into the rod 2 at the base end side of the injection passage 2a, and a flange 13 is provided around the outer periphery of the pipe body 12 at the base end side of the rod 2. Since the rod 2 base end portion is rotated, the rod 2 base end portion is compressed in the radial direction by the spiral glass fibers 8, 8a ...
By reinforcing the outside with the reinforcing layer 10 and the inside with the pipe body 12, the strength of the base end portion of the rod 2 is further improved, and buckling damage at the base end portion of the rod 2 can be prevented. Its practical effect is enormous.

[Brief description of the drawings]

FIG. 1 is an axial sectional view of an end portion of a self-drilling bolt according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is an axial cross-section of a self-drilling bolt end portion of another embodiment.

FIG. 4 is a front view of the essential parts of a self-piercing bolt in which a metal reinforcing layer is laminated on the threaded portion on the base end side.

5 is an axial cross-sectional view of FIG.

FIG. 6 is an axial sectional view of another embodiment of the self-drilling bolt of FIG.

FIG. 7 is an axial cross-sectional view of a self-drilling bolt equipped with a sleeve and a drill crown.

FIG. 8 is a cross-sectional view showing a driving state of self-drilling bolts in a tunnel with a widening schedule.

FIG. 9 is a cross-sectional view showing a mirror stop method for a tunnel tip.

[Explanation of symbols]

 2 Rod 2a Injection path 3 Screw part 4 Screw part 5 Drilling crown 6 Pipe 7, 7a ... Straight glass fiber 8, 8a ... Spiral glass fiber 10 Reinforcing layer 11, 11a… Small hole 12 Pipe body 13 Collar part

Claims (7)

[Claims]
1. In a rock support member having a drilling crown mounted on the tip side and a base end connected to a drilling machine or an injecting machine, a pipe made of a hardened resin is provided within the wall thickness of the pipe. A self-drilling bolt characterized in that a thread portion is formed on both outer peripheral portions of both ends of a rod made of a fiber-reinforced cured resin having linear glass fibers and spiral glass fibers oriented in the longitudinal direction of the pipe.
2. The self-drilling bolt according to claim 1, wherein the threaded portion is a round screw having rounded peaks and valley bottoms.
3. The self-drilling bolt according to claim 1 or 2, wherein the spiral direction of the spiral glass fiber is opposite to the screw part.
4. The self-drilling bolt according to claim 1, wherein the spiral glass fiber is unevenly distributed in the outer region of the pipe.
5. The self-drilling bolt according to claim 1, wherein a metal reinforcing layer is formed on the outer periphery of the screw portion on the base end side.
6. The self-drilling bolt according to claim 5, wherein the reinforcing layer has a small hole and is laminated.
7. A metal pipe body is inserted into the rod at the base end side of the injection path, and a flange portion provided around the outer periphery of the pipe body is brought into contact with the base end face of the rod. The self-drilling bolt according to claim 1, 2, 3, 4, 5 or 6.
JP35438195A 1995-12-28 1995-12-28 Self drilling bolt Expired - Lifetime JP3251485B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35438195A JP3251485B2 (en) 1995-12-28 1995-12-28 Self drilling bolt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35438195A JP3251485B2 (en) 1995-12-28 1995-12-28 Self drilling bolt

Publications (2)

Publication Number Publication Date
JPH09184400A true JPH09184400A (en) 1997-07-15
JP3251485B2 JP3251485B2 (en) 2002-01-28

Family

ID=18437180

Family Applications (1)

Application Number Title Priority Date Filing Date
JP35438195A Expired - Lifetime JP3251485B2 (en) 1995-12-28 1995-12-28 Self drilling bolt

Country Status (1)

Country Link
JP (1) JP3251485B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001023711A1 (en) * 1998-07-16 2001-04-05 Kfc Ltd. Ground reinforcing method
CN102205649A (en) * 2011-01-22 2011-10-05 中国矿业大学 Method for producing glass fiber reinforced plastic anchor pole
WO2019139149A1 (en) * 2018-01-11 2019-07-18 株式会社タカイコーポレーション Fiber-reinforced resin bolt manufacturing method and fiber-reinforced resin bolt

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001023711A1 (en) * 1998-07-16 2001-04-05 Kfc Ltd. Ground reinforcing method
CN102205649A (en) * 2011-01-22 2011-10-05 中国矿业大学 Method for producing glass fiber reinforced plastic anchor pole
WO2019139149A1 (en) * 2018-01-11 2019-07-18 株式会社タカイコーポレーション Fiber-reinforced resin bolt manufacturing method and fiber-reinforced resin bolt

Also Published As

Publication number Publication date
JP3251485B2 (en) 2002-01-28

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