JPH06330689A - Tunnel construction method - Google Patents

Tunnel construction method

Info

Publication number
JPH06330689A
JPH06330689A JP12140793A JP12140793A JPH06330689A JP H06330689 A JPH06330689 A JP H06330689A JP 12140793 A JP12140793 A JP 12140793A JP 12140793 A JP12140793 A JP 12140793A JP H06330689 A JPH06330689 A JP H06330689A
Authority
JP
Japan
Prior art keywords
tunnel
guide hole
step
pipe
pipe support
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.)
Pending
Application number
JP12140793A
Other languages
Japanese (ja)
Inventor
Masato Honda
Kazutoshi Inoue
Akira Kamiide
一敏 井上
正人 本多
明 神出
Original Assignee
Mitsui Constr Co Ltd
Osaka Bosui Constr Co Ltd
三井建設株式会社
株式会社大阪防水建設社
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 Mitsui Constr Co Ltd, Osaka Bosui Constr Co Ltd, 三井建設株式会社, 株式会社大阪防水建設社 filed Critical Mitsui Constr Co Ltd
Priority to JP12140793A priority Critical patent/JPH06330689A/en
Publication of JPH06330689A publication Critical patent/JPH06330689A/en
Pending legal-status Critical Current

Links

Abstract

(57) [Summary] (Modified) [Purpose] To efficiently construct a tunnel using a single guide hole. [Structure] The first step of constructing a guide hole 3 extending in the length direction of the tunnel at the top of the tunnel, the guide hole is used as a working pit, and the guide hole is provided on both sides of the guide hole in the cross-sectional direction of the tunnel and the outer shell corresponding portion. A second step of forming an arcuate pipe support 7 by adding pipes along it, and an arch shell composed of a large number of pipe supports arranged in parallel in the length direction of the tunnel by repeating the second step in the length direction of the tunnel. And a fourth step of forming a tunnel by excavating the inside of the arch shell. In the second step, a drilling machine equipped with an opening / closing bit capable of expanding and contracting the radius of gyration is used. The boring machine fixes the pipe support during the formation of the pipe support and advances the boring with the bit open, and after the formation,
Free from the first pipe, and with the bit closed, collect it to the guide hole side through the pipe support work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel construction method which is particularly useful when applied to the construction of large diameter tunnels.

[0002]

2. Description of the Related Art In view of soaring land prices and traffic congestion in urban areas, a vision for connecting urban areas with a large-diameter tunnel for underground space utilization has been proposed and attracted attention.

It is difficult to apply the existing tunnel construction technology as it is to the construction of a tunnel having a large diameter, for example, a diameter of 20 to 30 m, and development of a large diameter tunnel construction technology is desired.

Recently, as a construction technology for a large diameter tunnel,
It has been proposed that a plurality of guide holes should be constructed in parallel, and an arch shell should be constructed so as to be bridged between the guide holes, and then the inside of the arch shell should be excavated to form a tunnel. Building guide holes in a book is tedious.

The present invention has been made for the purpose of eliminating such conventional problems.

[0006]

SUMMARY OF THE INVENTION The present invention provides
The first step of constructing a guide hole extending in the length direction of the tunnel at a position corresponding to the top of the tunnel to be constructed, using the guide hole as a work pit, and crossing the tunnel on both sides of the guide hole. Direction and a second step of forming an arcuate pipe support by adding pipes along the outer shell corresponding portion, the second step
A third step of constructing an arch shell composed of a large number of pipe supports parallel to the outer contour of the tunnel in parallel with the length direction of the tunnel by repeating the steps at an appropriate pitch in the tunnel length direction, and the arch shell And a fourth step of forming a tunnel by excavating the inside, and in the second step, a boring machine equipped with an opening / closing bit capable of expanding and contracting a turning radius is used, and the boring machine is used for pipe support work. At the time of formation, the hole is advanced with the bit fixed while being fixed in the front pipe, and after the formation, it is free from the inside pipe and the bit is closed with the bit closed through the pipe support structure. Related to the tunnel construction method, which is characterized in that

[0007]

An embodiment of the method of the present invention will be described below with reference to the accompanying drawings.

When carrying out the method of the present invention, the length of the tunnel is formed in the ground 1 (see FIG. 2) at the apex of the outer portion 2 of the large-diameter tunnel to be constructed (shown in phantom in FIG. 1). One guide hole 3 extending in the vertical direction is constructed.

The guide hole 3 is used as a working pit when constructing an arch shell of a large diameter tunnel, and usually has a diameter of about 2 to 5 m. With such a diameter, it can be easily constructed by applying a normal tunnel construction method. For example, as shown in FIG. 2, as the shield type excavator 4 excavates, the segments 5 should be successively added. Thereby, the guide hole 3 can be excavated and formed between the vertical shafts 6 and 6.

After the guide hole 3 is constructed, the guide hole 3 is used as a working pit as schematically shown in FIG. 3, and pipe supports 7 for constructing an arch shell are provided on both sides of the guide hole 3. Are formed along the outer shell 2 of the tunnel in the cross-sectional direction of the tunnel.

To form the pipe support work 7, a large number of fixed length pipes 7a that are driven in an arc shape in the ground by operating the propulsion jacks 8 and drill holes installed in the frontmost fixed length pipes 7a 1 are formed. Machine 9 (see FIG. 4) is used.

The fixed-length pipes 7a and 7a 1 are provided with an outer shell corresponding portion 2.
A curved pipe having a curvature equal to that of the outer shell corresponding portion 2 is usually used to perform the arc-shaped propulsion along the arc of FIG.
A straight pipe may be used depending on the case. When a straight pipe is used, the joining ends may be cut diagonally and sequentially joined so that the whole exhibits a substantially circular arc.

The drilling machine 9 is for drilling the ground in front of the earliest fixed-length pipe 7a 1 , and is provided with a bit 9a which is opened and closed by remote operation. Te is at the bit 9a opened, performs drilling pipe 7a, the outer diameter of 7a 1 and substantially equal to or than this slightly larger rotational radius as shown in FIG. 4, by subtracting the turning radius in the closed state, As shown in FIG. 5, the pipes 7a and 7a 1 can be passed through. Such an opening / closing bit itself is known, and various known types of opening / closing bits are used.

The body 9b of the boring machine 9 has an opening / closing bit 9
a driving unit (not shown in FIGS. 4-5), the body portion 9b was constrained to the earliest fixed-length pipe 7a 1 by remote control or restraint and release mechanism 9c can be released from the constrained state is provided ing. 4 to 5 show a restraint / release mechanism 9c of a type having a packer portion which is inflated or contracted by supplying and discharging a fluid, but any restraint / release mechanism can be remotely operated. The configuration is not particularly limited.

Cables and flexible conduits for connecting a driving device and a restraint / release mechanism 9c installed in the drilling machine 9 to a control unit (not shown) installed in the guide hole 3 (see FIG. 3). (Not shown)
Are collectively stored in a protective hose 9d attached to the rear end of the main body 9b of the boring machine 9. The protection hose 9d extends from the rear end of the drilling machine 9 into the guide hole 3 and is used for pulling back and collecting the drilling machine 9.

FIG. 3 shows a situation in which the pipe support 7 is being formed. As shown in FIG.
As shown in FIG. 7, the drilling machine 9 is installed and fixed in the frontmost fixed length pipe 7a 1 by operating the restraint / release mechanism 9c. Next, the frontmost fixed length pipe 7a 1 is pushed into the ground by operating the propulsion jack 8 from within the guide hole 3 and under the guidance of drilling with the bit 9a in the open state, and by this pushing, the frontmost fixed length pipe 7a 1 is pushed. Length pipe 7a
1 is moved and propelled along the outer shell equivalent portion 2 based on the curved tube shape.

When the frontmost fixed-length pipe 7a 1 is moved and propelled by that length, the jack 8 is deactivated and the pipe 7a 1
The second fixed length pipe 7a is added to the rear end side of 1 by welding.

After adding the second fixed length pipe 7a,
Operate the jack 8 again to make the second fixed-length pipe 7a.
The pipes 7a 1 and 7a by the length of
A pipe support 7 of a predetermined length is provided on one side of the guide hole 3 by repeating the addition of the second and subsequent fixed length pipes 7a and the movement and propulsion by the length of the added fixed length pipe 7a. Can be formed.

Each time the regular length pipe 7a is added, it is necessary to insert a protective hose 9d into the pipe 7a and a cable, a flexible conduit, etc., which can be accommodated in a package, inside the protective hose 9d. As shown in FIG. 4, a joint portion 9 that can be appropriately separated in the middle of a protective hose 9d, a cable for accommodating the inside thereof, a flexible conduit, etc., for smoothing
e can be formed in advance.

FIG. 6 shows the situation at the end of formation of the pipe support work 7. From this state, the bit 9a is closed and the restraining / releasing mechanism 9c (see FIGS. 4-5) is actuated to carry out the cutting. by forming a free body portion 9b of the hole machine 9 from earliest pipe 7a within 1 it can be collected into the bore hole 3 by pulling back operation as, by the protective hose 9d shown in FIG.
The recovered boring machine 9 is repeatedly used to form the pipe support 7.

As shown in FIGS. 6 to 7, the pipe supporters 7 are formed on both sides of the guide hole 3, and after forming both sides, they are formed again at a position shifted by one pitch in the length direction of the tunnel. It By repeating this in the longitudinal direction of the tunnel, an arch shell 10 composed of a large number of pipe supports arranged in parallel in the longitudinal direction of the tunnel is constructed.

The construction of the arch shell 10 is schematically shown as a plan view in FIG. 8, and the space between the pipe supports 7, 7 can be strengthened by injecting a ground improvement agent or the like. The pitch interval between the pipe support works 7, 7 may be appropriately selected depending on the construction conditions.

After the arch shell 10 is constructed, the tunnel can be formed by excavating the inside thereof.

9 to 10 show a drilling machine 9 equipped with a pantograph type opening / closing bit 9a. The bit 9a is moved to the open state shown in FIG. 9 by the forward / backward movement of a rod 9g operated by a piston 9f. The configuration is such that the closed state shown in FIG. 10 can be selectively obtained. Also rod 9g
A drive device 9h (for example, a motor) is installed on the base end side of
The driving device 9h is operated to operate the bit 9 through the rod 9g.
The rotation is given to a. In the figure, 9i is a fixed cylindrical portion that is concentric with the rod 9g and that protrudes forward from the front end of the main body portion 9b of the boring machine 9, and that has a bit on a metal ring 9j that is rotatably supported on the cylindrical portion 9i. The base end side of 9a is supported.

A folding type opening / closing bit 9 is shown in FIGS.
A drilling machine 9 with a is shown, the bit 9a is a drive 9
A plurality of blade plates 9m, for example, three blades are radially extended from a rotary rod 9l to which rotation is given by k, and each blade 9m is provided with a binge portion 9n in the middle of the extension direction. The blade 9m receives the centrifugal force at the time of forward rotation and maintains the open state as shown in FIGS. 11 to 12, but when it is rotated reversely, the contact portion with the ground becomes a resistance, and FIGS.
As shown in FIG. 5, the hinge portion 9n is folded to be in a closed state and can be opened and closed by remote control.

[0026]

According to the method of the present invention, since a tunnel can be constructed using one guide hole, the tunnel can be constructed very efficiently as compared with the case where a plurality of guide holes are formed. In addition, the pipe support work can be formed from one side, and the drilling machine can be recovered and repeatedly used, so that the drilling machine can be efficiently used and it is economical.

[Brief description of drawings]

FIG. 1 is an explanatory view of a conductive hole forming position in the method of the present invention.

FIG. 2 is an explanatory diagram schematically showing the construction of a guide hole.

FIG. 3 is an explanatory view schematically showing a forming state of a pipe support work in the method of the present invention.

FIG. 4 is an explanatory view showing a bit opened state of a hole drilling machine applied to form a pipe support work.

FIG. 5 is an explanatory diagram showing a situation in which the bit is closed.

FIG. 6 is a view schematically showing the situation at the end of the formation of the pipe support work, as viewed from the tunnel cross-section side.

FIG. 7 is a view schematically showing a situation at the time of collecting the hole drilling machine, as viewed from the tunnel cross section side.

FIG. 8 is a plan view schematically showing a construction state of an arch shell.

FIG. 9 shows an example of a hole drilling machine applied to the method of the present invention,
It is a partial longitudinal cross-sectional view of an open state.

FIG. 10 is a partial vertical sectional view of the same closed state.

FIG. 11 is a longitudinal sectional view in an open state showing another example of the hole drilling machine applied to the method of the present invention.

FIG. 12 is a left side view of FIG. 11.

FIG. 13 is a vertical cross-sectional view of the same closed state.

FIG. 14 is a left side view of FIG.

[Explanation of symbols] 1 Ground 2 Tunnel outer part 3 Guide hole 4 Excavator 5 Segment 6 Vertical shaft 7 Pipe support 8 Propulsion jack 9 Drilling machine 10 Arch shell

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Kamide 7-6, Eisashi-cho, Tennoji-ku, Osaka City, Osaka Prefecture

Claims (1)

[Claims]
1. A first step of constructing a guide hole extending in the length direction of the tunnel at a position corresponding to the top of the tunnel to be built in the ground, utilizing the guide hole as a work well,
A second step of forming an arcuate pipe support by joining pipes on both sides of the guide hole along the cross-sectional direction of the tunnel and along the outer contour, and the second step is repeated at an appropriate pitch in the length direction of the tunnel. Thereby, a third step of constructing an arch shell composed of a large number of pipe supports arranged in parallel in the lengthwise direction of the tunnel in a portion corresponding to the outer contour of the tunnel, and a fourth step of excavating the inside of the arch shell to form a tunnel. In the second step, a boring machine equipped with an opening / closing bit capable of expanding / contracting the turning radius is used, and the boring machine is fixed in the front pipe at the time of forming the pipe support work and A tunnel construction method characterized by advancing the hole in the open state and, after forming the same, making it free from the frontmost pipe and collecting it to the guide hole side through the pipe support work with the bit closed.
JP12140793A 1993-05-24 1993-05-24 Tunnel construction method Pending JPH06330689A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12140793A JPH06330689A (en) 1993-05-24 1993-05-24 Tunnel construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12140793A JPH06330689A (en) 1993-05-24 1993-05-24 Tunnel construction method

Publications (1)

Publication Number Publication Date
JPH06330689A true JPH06330689A (en) 1994-11-29

Family

ID=14810416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12140793A Pending JPH06330689A (en) 1993-05-24 1993-05-24 Tunnel construction method

Country Status (1)

Country Link
JP (1) JPH06330689A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002227598A (en) * 2001-01-26 2002-08-14 Nippon Zenith Pipe Co Ltd Construction method for underground structure
JP2006219919A (en) * 2005-02-14 2006-08-24 Kinki Kaihatsu:Kk Double tube system pipe excavation device
JP2007002560A (en) * 2005-06-24 2007-01-11 Taisei Corp Tunnel widening method
JP2007100316A (en) * 2005-09-30 2007-04-19 Ishikawajima Harima Heavy Ind Co Ltd Shield machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002227598A (en) * 2001-01-26 2002-08-14 Nippon Zenith Pipe Co Ltd Construction method for underground structure
JP2006219919A (en) * 2005-02-14 2006-08-24 Kinki Kaihatsu:Kk Double tube system pipe excavation device
JP2007002560A (en) * 2005-06-24 2007-01-11 Taisei Corp Tunnel widening method
JP4564895B2 (en) * 2005-06-24 2010-10-20 大成建設株式会社 Tunnel widening method
JP2007100316A (en) * 2005-09-30 2007-04-19 Ishikawajima Harima Heavy Ind Co Ltd Shield machine

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