KR20140065634A - Construction method for tunnel using boring apparatus - Google Patents

Construction method for tunnel using boring apparatus Download PDF

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Publication number
KR20140065634A
KR20140065634A KR1020120130903A KR20120130903A KR20140065634A KR 20140065634 A KR20140065634 A KR 20140065634A KR 1020120130903 A KR1020120130903 A KR 1020120130903A KR 20120130903 A KR20120130903 A KR 20120130903A KR 20140065634 A KR20140065634 A KR 20140065634A
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KR
South Korea
Prior art keywords
boring
rod
tunnel
diameter
bit
Prior art date
Application number
KR1020120130903A
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Korean (ko)
Inventor
유정훈
유진오
이동훈
이동희
박윤석
백종현
한동훈
Original Assignee
코오롱글로벌 주식회사
백종현
주식회사 한화
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Application filed by 코오롱글로벌 주식회사, 백종현, 주식회사 한화 filed Critical 코오롱글로벌 주식회사
Priority to KR1020120130903A priority Critical patent/KR20140065634A/en
Publication of KR20140065634A publication Critical patent/KR20140065634A/en

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/16—Machines for digging other holes in the soil
    • E02F5/18—Machines for digging other holes in the soil for horizontal holes or inclined holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D3/00—Particular applications of blasting techniques
    • F42D3/04—Particular applications of blasting techniques for rock blasting

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)

Abstract

A boring step of forming a large-diameter boring hole 1 toward the front of the film surface so that the lower end of the large-diameter boring hole 1 is located at a height of 0.3 to 1.7 m above the bottom surface of the tunnel; Forming a plurality of blast holes on the surface of the blind; And a step of loading and bombarding explosives in a plurality of blasting holes, wherein a large-diameter boring hole is formed at a lower central portion of the tunnel and a blasting operation can be performed So as to obtain excellent blasting efficiency and economical efficiency.

Description

TECHNICAL FIELD [0001] The present invention relates to a tunnel excavation method using a boring-

Field of the Invention [0002] The present invention relates to a civil engineering field, and more particularly, to a tunnel excavation method.

Generally, an excavation method is used in which a large number of blasting holes (charge holes and armament holes) are formed on the surface of a tunnel and blasting is carried out by loading explosives.

Before the blasting operation, if the boring hole of a large diameter at the central portion of the tunnel is boring (it is a kind of armed means, meaning that the diameter is larger than that of the blasting hole), the blasting efficiency is increased, .

This method is called a tunnel excavation method (blasting method) using a pre-caliber boring ball.

However, conventionally, the boring hole of the upper large diameter is formed at a high position in the center of the tunnel, and the blasting operation is performed, so that the blasting efficiency is not good.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a borehole drilling apparatus and a borehole drilling method for drilling a borehole of a large diameter at a center position of a tunnel, And to propose a tunnel excavation method.

In order to solve the above problems,

The present invention allows a large-diameter boring hole to be formed at a lower position in the center of a tunnel, and to perform a blasting operation, thereby achieving excellent blasting efficiency and economical efficiency.

1 shows an embodiment of the present invention,
1 and 2 are conceptual diagrams for explaining the principle of the present invention.
3 is a perspective view of a first embodiment of a boring apparatus;
4 is a perspective view of a second embodiment of a boring apparatus;
5 is an exploded perspective view of a second embodiment of the boring apparatus;
6 to 10 are process drawings of an embodiment of a tunnel excavation method.

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

As shown in FIG. 1 and subsequent drawings, the tunnel drilling method using the drill hole according to the present invention is basically designed such that the lower end of the large-diameter boring hole 1 is positioned at a height of 0.3 to 1.7 m above the bottom surface of the tunnel A boring step of forming a large-diameter boring hole 1 toward the front side of the film surface; Forming a plurality of blast holes on the surface of the blind; And loading and explosion of explosives into the plurality of blasters.

The rocks forming the tunnel surface are the weakest for the tensile force, the weakest for the shear force, and the strongest for the compressive force.

When a large-diameter boring hole 1 is formed and blasting is performed, a free surface is formed around the boring hole 1. Since the upper rock of the free surface receives tensile force (gravity) toward the free surface direction (gravity direction) , And small blasting force (small charge) (Fig. 1 and 2).

However, since the lower rocks of the free surface are opposed to the opposite direction of the free surface (toward the gravity direction), the blasting is performed only when a large blasting force (a large amount of charge) is required.

On the basis of this principle, when the boring hole 1 of the large diameter is formed at a high position in the center of the tunnel, the lower area of the free surface due to the blasting is broadly formed. Therefore, (Fig. 1).

In contrast, when the large-diameter boring hole 1 is formed at a low position in the center of the tunnel, the lower area of the free surface due to blasting is narrowly formed. Therefore, a small blasting force (Fig. 2).

The method of excavating a tunnel according to the present invention is based on this idea, and is characterized in that the lower end of the large-diameter boring hole 1 is located at a height of 0.3 to 1.7 m above the bottom surface of the tunnel A large-diameter boring hole 1 is formed, and a blasting hole is formed around the large-diameter boring hole 1, thereby blasting.

Here, the height of 0.3 ~ 1.7m is considered to be the lowest position for forming the large-diameter boring hole (1), considering the scale and weight of the actual equipment.

The diameter of the boring ball is preferably 250 to 1000 mm, and the depth of the boring ball is preferably 10 to 60 m for the above reasons.

Hereinafter, a tunnel excavation method using the cruising boring device 100 will be described.

A support structure 110 of a rail structure supported on the bottom surface of the tunnel; A driving unit 120 installed on the support base 110 to allow forward and backward driving; A rod 130 detachably installed in front of the driving unit 120; And a bit 140 provided in front of the rod 130 so as to excavate the surface to be closed by the driving unit 120. The height from the bottom surface of the tunnel to the lower end of the bit 140 is 0.3 to 1.7 m .

Conventionally, a boring operation of a large-diameter boring hole 1 was carried out by using a general boring device mounted on a vehicle. Such a vehicle was equipped with a wheel having a large diameter in order to withstand the weight of the boring device, There is a problem in that there is a limit in lowering the height of the bit.

The present invention is not limited to the use of such a vehicle structure boring apparatus but a support structure 110 having a rail structure may be installed on the bottom surface of the tunnel and a driving unit 120, a rod 130, The height of the bit 140 can be made as low as possible and consequently the boring hole 1 of the large diameter can be positioned at a lower position of the center of the tunnel So as to be located at a height of 0.3 to 1.7 m from the bottom surface of the tunnel).

Therefore, as described above, there is an effect that excellent blasting efficiency and economical efficiency are obtained.

Here, the driving unit 120 provides a driving force (rotation, blow) for excavating the rod 130 and the bit 140, and also plays a role of driving itself on the support structure 110 of the rail structure in forward and backward directions I am responsible.

The support structure 110 of the rail structure specifically includes a plurality of lower pedestals 111 provided along the longitudinal direction of the tunnel so as to be in contact with the bottom surface of the tunnel; A plurality of upper pedestals 112 installed along the width direction of the tunnel on the upper part of the plurality of lower pedestals 111; And the rails 113 provided along the longitudinal direction of the tunnels on the upper portion of the upper pedestal 112 are formed by lowering the height of the driving portion 120, the rod 130, and the bit 140 while maintaining the structural stability. (Figs. 3 and 4).

Here, the driving unit 120 is installed to perform forward and backward driving along the rails 113, and the lower and upper supports 111 and 112 are realized by H beams in terms of workability and structural stability.

In order to correct deflection of the bit 140, the rod 130, and the extension rod 130a during the boring operation, the bit direction must be slightly upward, and in order to correct an error according to the rotation direction, The direction of the bit should be slightly changed.

A bit guide hole 151 is formed in the deep part and a bit guide part 150 formed to be adjustable in the up and down direction is provided on the rail 113 to guide the drilling direction of the bit 140. [ (Figs. 3 and 4).

When all of the structures described above take an integral structure, there may be problems in transportation, storage and installation due to excessive weight.

In order to prevent this, the support base 110 includes a front support 110a, a center support 110b and a rear support 110c that are separated along the longitudinal direction, and the bit guide 150 includes a front support 110a , And the driving unit 120 is preferably installed on the upper part of the rear support table 110c (FIG. 5).

At this time, the lower pedestal 111, the upper pedestal 112, and the rails 113 of the front support 110a, the center support 110b, and the rear support 110c are combined by welding to have an integral structure The front supporting table 110a, the center supporting table 110b, and the rear supporting table 110c are made to be engaged with each other by screwing, which can be separated and assembled, in terms of workability.

Hereinafter, an embodiment of the tunnel excavation method according to the present invention will be described in detail.

The center support 110a and the center support 110b and the rear support 110c are positioned on the bottom surface adjacent to the surface of the tunnel and the front support 110a, the center support 110b and the rear support 110c, And is coupled by screw coupling to provide a leading borehole boring apparatus 100 (FIG. 6).

The driving unit 120 is driven forward and the bit 140 and the rod 130 form a large-diameter boring hole 1 toward the front of the tunnel surface.

When the driving unit 120 is adjacent to the front end of the supporting table 110, the rod 130 and the driving unit 120 are separated from each other and the driving unit 120 is driven rearward and positioned at the rear end of the supporting table 110 ).

The length of the rod assembly is extended in such a manner that the front end of the extension rod 130a is coupled to the rear end of the rod 130 and the rear end of the extension rod 130a is coupled to the driver 120 (Fig.

The boring hole 1 of a large diameter is formed toward the front of the surface of the tunnel by the bit 140, the rod 130 and the extension rod 130a while driving the drive part 120 forward (FIG. 10) .

A large-diameter boring hole 1 having a depth designed by repetition of the above driving part separation step, the extension rod coupling step and the extension boring step is formed.

During the repeated boring operation, the bit guide unit 150 is upwardly adjusted to correct deflection of the bit 140, the rod 130 and the extension rod 130a, and the bit guide unit 150 is adjusted to the left Or rightward to correct an error in accordance with the rotational direction of the bit 140, the rod 130, and the extension rod 130a.

In order to effectively discharge the slime generated in the boring hole 1 of the large diameter during the boring operation, the boring is temporarily stopped and the inside of the large-diameter boring hole 1 is filled with water by a water supply portion (not shown) It is preferable that high-pressure air is instantaneously sprayed into the large-diameter boring hole 1 by an air supply unit (not shown) such as a compressor so that the slime is discharged to the outside together with water.

The water supply unit and the air supply unit may be configured as separate apparatuses, but when installed in the boring apparatus 100 according to the present invention, more excellent workability and environment friendliness can be obtained.

After forming a large-diameter boring hole 1 having a designed depth, a large number of blasting holes (charge holes and armament holes) are formed on the surface of the burring surface (large-diameter boring hole 1) do.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

1: Large diameter boring hole 100: Linear diameter boring device
110: support frame 110a: front support frame
110b: center support frame 110c: rear support frame
111: lower pedestal 112: upper pedestal
113: rail 120:
130: rod 130a:
140: bit 150: bit guide
151: bit through hole

Claims (8)

A boring step of forming a large-diameter boring hole 1 toward the front of the film surface so that the lower end of the large-diameter boring hole 1 is located at a height of 0.3 to 1.7 m above the bottom surface of the tunnel;
Forming a plurality of blast holes on the firing surface;
Loading and blasting the explosive in the plurality of blasters;
Wherein the tunnel excavation method is performed by using a pre-caliber boring ball. The method according to claim 1,
Wherein the diameter of the boring hole is 250 to 1000 mm. The method according to claim 1,
Wherein the depth of the boring hole is 10 to 60 m. The method according to claim 1,
The boring step
A support member 110 supported on the bottom surface of the tunnel, a drive unit 120 installed on the support member 110 to enable forward and backward driving, a rod 130 detachably installed in front of the drive member 120, (120) including a bit (140) provided in front of the rod (130) so as to excavate the surface of the rod by means of the rod (120);
Installing a boring device (100) on the bottom surface adjacent to the surface of the tunnel;
Forming the large-diameter boring hole (1) toward the front of the tunnel surface by the bit (140) and the rod (130) while driving the driving part (120) forward;
When the driving unit 120 is adjacent to the front end of the supporting unit 110, the rod 130 and the driving unit 120 are separated and the driving unit 120 is driven backward, ;
An extension rod coupling step of coupling the front end of the extension rod 130a to the rear end of the rod 130 and coupling the rear end of the extension rod 130a to the driving unit 120;
The driving unit 120 is driven forward and the bit 140, the rod 130 and the extension rod 130a are used to extend the boring hole 1 of the large diameter toward the front of the tunnel surface, step;
A boring step of forming the large-diameter boring hole 1 having a depth designed by repetition of the driving part separating step, the extension rod combining step and the extended boring step;
Wherein the tunnel excavation method is performed by using a pre-caliber boring ball. 5. The method of claim 4,
The boring step
During the repeated boring step, the front end of the bit 140 is adjusted upward to correct deflection of the bit 140, the rod 130 and the extension rod 130a.
Wherein the tunnel excavation method is performed by using a pre-caliber boring ball. 5. The method of claim 4,
The boring step
Correcting an error according to a rotation direction of the bit 140, the rod 130, and the extension rod 130a by adjusting the front end of the bit 140 left or right during the repeated boring step;
Wherein the tunnel excavation method is performed by using a pre-caliber boring ball. 5. The method of claim 4,
The support base 110 of the cruciform boring apparatus 100 includes a front support 110a, a center support 110b and a rear support 110c separated along the longitudinal direction, And the driving unit 120 is installed on the upper part of the rear support table 110c,
The boring device installation step
Positioning the front support 110a, the center support 110b, and the rear support 110c on a floor adjacent to the surface of the tunnel;
A step of coupling the front support platform 110a, the center support platform 110b and the rear support platform 110c by screwing to each other to install the linear borehole apparatus 100;
Wherein the tunnel excavation method is performed by using a pre-caliber boring ball. 5. The method of claim 4,
The boring step
Stopping the boring and filling the inside of the boring hole (1) with water during the repeated boring step;
After the inside of the large-diameter boring hole (1) is filled with water, high-pressure air is injected into the large-diameter boring hole (1) so that the slime of the large-diameter boring hole (1) Step;
Wherein the tunnel excavation method is performed by using a pre-caliber boring ball.
KR1020120130903A 2012-11-19 2012-11-19 Construction method for tunnel using boring apparatus KR20140065634A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101587276B1 (en) * 2015-07-16 2016-01-20 (주)성진이엔씨 The tunnel excavating apparatus and tunnel excavating method for using it
KR102029202B1 (en) 2019-03-14 2019-10-07 (주)성진이엔씨 A tunnel excavation apparatus that is moving by itself
WO2020124279A1 (en) * 2018-12-19 2020-06-25 Rojas Pinones Alberto Santiago Tunnelling equipment for horizontal drilling in the rock of the guide hole according to a drilling pattern for tunnels; method for constructing a drilling pattern for tunnels outlining a cut design; and method for drilling according to drilling patterns
CN111397454A (en) * 2020-03-31 2020-07-10 西南交通大学 Method for realizing spiral tunnel blasting drilling construction
KR102566443B1 (en) 2023-04-14 2023-08-14 주식회사 제이에스이앤씨 Vibration-Free Rock Crushing with 3 Free-face Excavation Method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101587276B1 (en) * 2015-07-16 2016-01-20 (주)성진이엔씨 The tunnel excavating apparatus and tunnel excavating method for using it
WO2020124279A1 (en) * 2018-12-19 2020-06-25 Rojas Pinones Alberto Santiago Tunnelling equipment for horizontal drilling in the rock of the guide hole according to a drilling pattern for tunnels; method for constructing a drilling pattern for tunnels outlining a cut design; and method for drilling according to drilling patterns
KR102029202B1 (en) 2019-03-14 2019-10-07 (주)성진이엔씨 A tunnel excavation apparatus that is moving by itself
CN111397454A (en) * 2020-03-31 2020-07-10 西南交通大学 Method for realizing spiral tunnel blasting drilling construction
CN111397454B (en) * 2020-03-31 2021-06-22 西南交通大学 Method for realizing spiral tunnel blasting drilling construction
KR102566443B1 (en) 2023-04-14 2023-08-14 주식회사 제이에스이앤씨 Vibration-Free Rock Crushing with 3 Free-face Excavation Method

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