JPH10331570A - Pipe roof constructing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insert pipes with junctions by a small propelling force. SOLUTION: This pipe roof constructing method comprises inserting a pipe 12 into a hole 11 excavated, causing a male junction 20 to intrude into a junction hole 26 drilled, and inserting the pipes 12 in sequence as they are connected together by engagement of the female junction 21 of the next pipe 12 to be inserted with the male junction 20 of the pipe 12 already inserted, while causing the female junction to intrude into the junction hole 26. Therefore, since the resistance of the junction 20 to intrusion is small, the pipes 12 can be inserted with a small propelling force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe roof method for digging a tunnel after burying a steel pipe along the outer circumference of the tunnel.

[0002]

2. Description of the Related Art In a pipe roof method, adjacent pipes are connected by a junction in order to prevent the pipes from being separated. For example, as shown in FIGS. 9 (a) and 9 (b), a male junction 2 and a female junction 3 are provided on a pipe 1, and a male junction 2 and a female junction 3 of adjacent pipes 1 and 1 are slid and engaged in the longitudinal direction. By doing so, the adjacent pipes 1 are connected.

[0003]

Since the hole 4 for inserting the pipe 1 has a shape conforming to the outer peripheral shape of the pipe 1, in the case of the junction shape shown in FIG. Is inserted, the junction (female junction 3) penetrates into the ground. For this reason, the penetration resistance of the junction is large and the driving force for inserting the pipe 1 is large. In particular, when hard ground is applied, the penetration resistance of the junction is extremely large, and the pipe 1 may not be inserted.

In the case of the junction shape shown in FIG. 9 (b), since the junction (female junction 3) does not penetrate into the ground, the pipe 1 can be inserted even when the hard ground is constructed. Since the welding of the pieces 5 is required, the operation of attaching the junction (female junction 3) to the pipe 1 becomes very troublesome.

Therefore, an object of the present invention is to provide a pipe roof construction method capable of solving the above-mentioned problems.

[0006]

Means for Solving the Problems and Functions / Effects A first invention is to provide a plurality of pipes 1 having a male junction 20 and a female junction 21 along the outer periphery of a tunnel excavation.
2 is the male junction 2 of the adjacent pipe 12
In the pipe roof construction method, in which the pipes 12 are inserted and the male junction 20 or the female junction 21 is penetrated in the pipe roof construction method in which the pipes 12 are inserted one after another while being connected by engaging the female junction 21 with the female junction 21. The pipe 12 is inserted into the pipe insertion portion, the male junction 20 or the female junction 21 is inserted into the junction penetrating portion, and the female of the pipe 12 to be inserted next into the male junction 20 or the female junction 21 of the pipe 12 already inserted. This is a pipe roof construction method in which a junction 21 or a male junction 20 is engaged.

According to the first invention, the male junction 20 or the female junction 21 penetrates into a junction penetrating portion formed in advance, and the male junction 20 and the female junction 21 of the adjacent pipe 12 are formed within the junction penetrating portion. Engage.

As a result, the male junction 20,
The penetration resistance of the female junction 21 is extremely small, and the pipe 12 can be smoothly inserted with a small propulsion force. The male junction 20 and the female junction 21 of the adjacent pipe 12 are securely engaged by inserting the pipe 12.

Therefore, a plurality of pipes 12 can be inserted with a small propulsion force while connecting adjacent pipes 12 reliably.

According to a second aspect of the present invention, in the first aspect, a junction penetrating portion is formed as a junction hole 26, and excavated earth and sand from the junction hole 26 is discharged through the inside of the male junction 20 or the female junction 21. It is a pipe roof method.

According to the second aspect, the excavated earth and sand in the junction hole 26 can be smoothly discharged by using the male junction 20 or the female junction 21.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a steel pipe 12 is inserted by a propulsion jack 13 into a hole 11 (a pipe insertion portion) excavated by a leading excavator 10. The leading drilling device 10 attaches the main body 15 to the leading conduit 14 so as to swing freely,
A cutter head 16 is rotatably attached to the main body 15.

A thrust is exerted on the leading excavator 10 through the pipe 12 by the extension force of the propulsion jack 13, and the ground is excavated by the cutter 17 by rotating the cutter head 16, and the excavated soil is removed from the opening 18. It is taken in and transported through the inside of the pipe 12.

A male junction 20 and a female junction 21 are attached to the pipe 12 as shown in FIG. The male junction 20 is a hollow elongated member having a closed section, for example, a circular cylindrical body. The male junction 20 is fixed to the outer peripheral surface of the pipe 12 by welding or the like.

The female junction 21 slides and fits on the outer surface of the male junction 20 from the longitudinal direction, and has a discontinuous cross-sectional shape, for example, a substantially C-shaped long material. It is fixed to the outer surface by welding or the like.

A means for forming a junction penetrating portion, for example, a junction cutter head 22 for digging a junction penetrating hole is provided at the tip of the male junction 20. As shown in FIGS. 3 and 4, this junction cutter head 22 is
At the same time, an opening 25 is formed in the disk 23. The junction cutter head 22 has a slightly larger diameter than the male junction 20, and the junction penetration hole 26 excavated by the junction cutter head 22 is configured to be the same as or slightly larger than the outer surface shape of the female junction 21.

The junction cutter head 22 is driven to rotate by a drive shaft inserted into the male junction 20. For example, it is rotationally driven by a screw conveyor 27 inserted into the male junction 20. Thus, the excavated earth and sand excavated by the junction cutter head 22 is conveyed by the screw conveyor 27 through the inside of the male junction 20.

Next, the operation of inserting the pipe 12 into the ground will be described. As shown in FIG. 5A, the pipe 12 is inserted into the ground while drilling the hole 11 with the cutter head 16. By inserting the pipe 12, a junction hole 26 is pierced by the junction cutter head 22, and the male junction 20 penetrates into the junction hole 26. A gap 28 through which the female junction 21 can penetrate is formed between the outer surface of the male junction 20 and the inner surface of the junction hole 26.

When the pipe 12 is inserted in a ring shape continuously on the outer periphery of the excavation of the tunnel, an auxiliary junction for the auxiliary junction is formed in the pipe 12 in order to form a hole 29 penetrating the female junction 21 when the pipe 12 is first inserted. Install the cutter head. When the pipe 12 is inserted into a substantially upper half of the outer periphery of the tunnel, only the male junction 20 may be attached to the pipe 12 to be inserted first.

In order to insert the pipe 12 adjacent to the pipe 12 inserted as described above, the cutter head 16 drills the hole 11 continuously with the junction hole 26 as shown in FIG. Then, the pipe 12 is inserted into the hole 11. As a result, the female junction 21 of the pipe 12 to be inserted next penetrates into the gap 28 between the male junction 20 and the junction hole 26 of the already inserted pipe 12 as shown in FIG. The female junction 21 is engaged with the outer surface of the second member. At the same time, a junction hole 26 into which the male junction 20 penetrates is formed.

In this manner, the pipes 12 are sequentially inserted while being connected by the junction.

When the pipe 12 is inserted continuously into the outer circumference of the excavation of the tunnel, the hole 29 that penetrates the female junction 21 of the first pipe 12 is already drilled when the last pipe 12 is inserted. , Pipe 12
It is not necessary to attach the junction cutter head 22 to the male junction 20 of FIG. When the pipe 12 is inserted into a substantially upper half of the outer periphery of the tunnel, only the female junction 21 may be attached to the pipe 12 to be inserted last.

As shown in FIG. 6, an auxiliary pipe 30 having the same diameter as that of the male junction 20 is attached to the outer surface of the leading pipe 14, and a junction cutter head 22 is attached to the tip of the auxiliary pipe 30. The junction hole 26 may be formed at 10.

The male junction 20 may be T-shaped as shown in FIG. In this case, the pipe 12 is inserted so that the male junction 20 of the pipe 12 to be inserted next is engaged with the female junction 21 of the already inserted pipe 12.

In the above case, a junction cutter head 22 may be attached to the tip of the female junction 21, and the female junction 21 may penetrate into the junction hole drilled by the junction cutter head 22. Thereby, it becomes possible to discharge the excavated earth and sand through the inside of the substantially C-shaped female junction 21.

In each of the above embodiments, the pipes 12 are sequentially inserted while drilling and drilling the hole 11 and the junction hole 26. However, the hole 11 and the junction hole 26 are sequentially drilled and drilled, and then the pipe 12 is formed. May be inserted to engage the male junction 20 and the female junction 21.

Although the pipe insertion part is the hole 11 and the junction penetration part is the junction hole 26, the pipe insertion part and the junction penetration part may be made into a flexible state by blowing high-pressure water to the ground with a water jet or the like. .

For example, as shown in FIG. 8, a plurality of nozzles 40 are provided at the tip of the leading pipe 14 so that high-pressure water is sprayed along the portion of the ground where the pipes 12 are inserted. Are provided, and high-pressure water is sprayed on the portion of the ground where the male junction 20 penetrates.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pipe insertion device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a male junction and a female junction.

FIG. 3 is a sectional view of a male junction and a junction cutter head.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is an explanatory view of a process of inserting a pipe.

FIG. 6 is a perspective view showing a second embodiment of the pipe insertion device.

FIG. 7 is an explanatory diagram showing a second embodiment of a male junction and a female junction.

FIG. 8 is a perspective view of a pipe insertion device according to a second embodiment of the present invention.

FIG. 9 is an explanatory diagram of a conventional male junction and female junction.

[Description of Signs] 1 ... pipe 2 ... male junction 3 ... female junction 4 ... hole 5 ... U-shaped piece 10 ... leading drilling device 11 ... hole 12 ... pipe 13 ... propulsion jack 14 ... leading conduit 15 ... body 16 ... cutter Head 17 ... Cutter 18 ... Opening 20 ... Male junction 21 ... Female junction 22 ... Junction cutter head 23 ... Plate 24 ... Cutter 25 ... Opening 26 ... Junction hole 27 ... Screw conveyor 28 ... Gap 29 ... Hole 30 ... Auxiliary Pipe 40 ... Nozzle

Continued on the front page (72) Inventor Keishi Miura 3-1-1 Ueno, Hirakata-shi, Osaka Prefecture Komatsu Seisakusho Underground Construction Machinery Division (72) Inventor Takashi Nagayoshi 3-1-1 Ueno, Hirakata-shi, Osaka Komatsu Ltd. Underground Construction Equipment Division

Claims (2)

[Claims] A plurality of pipes (12) having a male junction (20) and a female junction (21) are formed along the outer periphery of a tunnel by exchanging a plurality of pipes (12) with adjacent pipes (1).
2) Insert the male junction (20) and the female junction (21) sequentially while engaging them by engaging them,
Then, in the pipe roof construction method of excavating a tunnel, a part for inserting the pipe (12) and a part for penetrating the male junction (20) or the female junction (21) are formed, and the pipe (12) is inserted into the pipe insertion part. At the same time, the male junction (20) or the female junction (21) penetrates into the junction penetration part, and the pipe (12) to be inserted next into the male junction (20) or the female junction (21) of the pipe (12) already inserted. A female junction (21) or a male junction (20). 2. A junction hole (26) having a junction penetrating portion, and excavated earth and sand in the junction hole (26) is discharged through the inside of the male junction (20) or the female junction (21). The pipe roof method according to 1.