JP2001040990A - Primary propulsion pipe for use in boring small-bore tunnel and boring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a primary propulsion pipe and a boring method for use in boring a small-bore tunnel while increasing efficiency and profitability by using the primary propulsion pipe comprising a gutter-shaped part with chipped parts and a cover part as a temporary propulsion pipe, and abolishing the operations of attaching and removing and passing cable hoses each time the primary propulsion pipe is extended. SOLUTION: A primary propulsion pipe 1 comprising a gutter-shaped part 1a having an opening and a cover part 1b for closing the opening is used, and a cable introduction pipe 4 through which cable hoses 3 are passed is inserted from the opening into the gutter-shaped part 1a whose opening is set to point upward. The opening in the gutter-shaped part 1a through which the cable introduction pipe 4 is inserted is closed by the cover part 1b and the gutter- shaped part 1a and the cover part 1b are connected integrally with each other; the primary propulsion pipes 1 thus interconnected are fed one by one into an end device to construct a tunnel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-diameter tunnel using a small-diameter propulsion device to bury an underground object including a communication pipeline, a sewer pipe, and a gas pipe without digging the ground. The present invention relates to a primary propulsion pipe in a small-diameter tunnel excavation used for constructing a tunnel and an excavation construction method for excavating a tunnel using the primary propulsion pipe, and more particularly, for excavating underground and controlling an excavation direction. To build a small-diameter tunnel for burying underground objects including communication pipelines, sewer pipes, and gas pipes without cutting the ground using propulsion equipment equipped with In addition, a cable / hose is connected to the tip device, and a drilling material including hydraulic oil, a control signal and electric power are supplied to the tip device through the cable / hose to the tip device so as to advance while excavating underground. apparatus It continued has been successively spliced by relates primary propulsion tube and excavation construction method in the small-diameter tunneling used to construction a tunnel.

[0002]

2. Description of the Related Art In the excavation of a small-diameter tunnel, a temporary propulsion pipe (also referred to as a pilot pipe) is successively added after a tip device which advances while excavating underground to form a temporary tunnel composed of a plurality of temporary propulsion pipes. After the first step of constructing the tunnel, the tunnel is constructed by performing the second step of sequentially replacing the temporary propulsion pipe with the main propulsion pipe. In such a two-step small-diameter propulsion method, cables and hoses are connected to the rear end of the tip device in order to supply hydraulic power, electricity, and materials such as sliding materials to the tip device of the small-diameter propulsion device. are doing.

However, as described above, in the first step, when the tip device advances while excavating in the ground, the temporary propulsion pipe is successively added after the tip device. The cables and hoses connected to the device need to be passed through the added temporary propulsion pipe.For this reason, each time a new temporary propulsion pipe is added, the cable / hoses are cut off. It is necessary to attach / detach cables and hoses and reconnect them after passing through the newly added temporary propulsion pipe and to pull them into the temporary propulsion pipe.

FIG. 15 shows such a conventional construction method.
This will be described with reference to FIG.

[0005] As shown in FIG.
In order to construct a tunnel by burying a propulsion pipe in the reaching shaft 43 from the first, a tip device 23 is first put into the starting shaft 41 by a crane (not shown), and a rear end portion of the tip device 23 is pushed onto the base of the original pushing device 25. Set to 22. To the tip device 23 and the main pushing device 25 set as described above, the cables / hoses 3 are connected from the power device 11 provided on the ground portion of the starting shaft 41, and a control cable and the like are connected from the control device 35. This allows it to operate.

The tip device 23 set as shown in FIG. 15A is connected to the push table 22 via the jack 33 of the original push device 25.
As shown in FIG. 15 (b), the tip exits from the starting shaft 41 and enters the underground 17, and the tip device 23 advances while excavating the underground 17. in this case,
The tip device 23 is operated by hydraulic power supplied from the power device 11 through the cables and hoses 3.

The tip device 23 is moved underground 1 by the main pushing device 25.
7, the cables and hoses 3 with respect to the tip device 23 are once cut off, and the push table 22 of the original push device 25 returns to the original position, as shown in FIG. The temporary propulsion pipe 65 is put into the starting shaft 41 by the crane 37, and is set in the main pushing device 25 so that the rear end of the temporary propulsion pipe 65 contacts the push table 22 as shown in FIG. At the same time, the cables and hoses 3 from the power unit 11 pass through the temporary propulsion pipe 65 and
3 is reconnected.

When the propulsion pipe is set in the main pushing device 25 and the cables / hoses 3 are also connected to the tip device 23 through the temporary propulsion pipe 65, as shown in FIG. The temporary propulsion pipe 65 is pushed forward by the push table 22 via the jack 33 of the original pushing device 25, and the front end of the temporary propulsion pipe 65 contacts the rear end of the tip device 23. While being pushed by the pushing device 25, it advances in the underground 17 together with the tip device 23.

In this way, the temporary propulsion pipe 65 is connected to the tip device 2.
3 and then into the underground 17
As shown in (b), another temporary propulsion pipe 66 is put into the starting shaft 41 by the crane 37. Thereafter, the process of successively adding the temporary propulsion pipes 65, 66, and 67 as shown in FIGS. 17B to 19B is repeatedly performed in the same manner as the above-described process. Subsequently, the temporary propulsion pipes 65, 66, and 67 are buried one after another, and a temporary tunnel including a plurality of temporary propulsion pipes 65, 66, and 67 added between the start shaft 41 and the arrival shaft 43 is constructed. Become.

As shown in FIG. 19B, the starting shaft 41
And a plurality of temporary propulsion pipes 6 added between the
After the temporary tunnel composed of 5, 66, 67 has been constructed, the main propulsion pipe 72 is put into the starting shaft 41 by the crane 37, as shown in FIG.
Reference numeral 2 denotes a rear end portion of which is set on the push table 22 of the original push device 25 as shown in FIG. Then, the main propulsion tube 72 is pushed forward by the push table 22 via the jack 33 of the main pushing device 25 and moves forward, and its front end is connected to the rear end of the temporary propulsion tube 67 as shown in FIG. Then, the temporary propulsion pipe 67 is pushed. When the main propulsion pipe 72 is pushed by the push table 22 to push the temporary propulsion pipe 67, the first provisional propulsion pipe 65 that has reached the reaching shaft 43 exits from the underground 17 and moves to the reaching shaft 43. It is pushed out and taken out to the ground by the crane 71 as shown in FIG.

[0011] The subsequent processing will be described with reference to FIGS.
As shown in (b), after the previous main propulsion pipe 72, new main propulsion pipes 73 and the like are successively thrown into the starting shaft 41, added after the previous main propulsion pipe 72 and the like, and pushed by the pusher 22. By moving the temporary propulsion pipes 65, 66, 67
Are sequentially pushed out to the reaching shaft 43, and these temporary propulsion pipes are replaced with the main propulsion pipes 72, 73, etc., whereby the main tunnel is constructed.

In FIGS. 15 to 22, the temporary propulsion pipe 6
5, 66, 67, etc. are marked with a horizontal bar as a mark in the longitudinal direction.
It is written to distinguish it from others, and is actually unnecessary.

[0013]

According to the above-mentioned construction method using a temporary propulsion pipe, when the tip device advances while excavating underground, the temporary propulsion pipe is successively placed after the tip device. Since the cables and hoses connected to the tip device need to be drawn through the added temporary propulsion pipe, the cable must be connected each time a new temporary propulsion pipe is to be added. -The hoses must be physically disconnected, passed through a newly added temporary propulsion pipe, and then reconnected.Removing the cables and hoses and pulling them into the temporary propulsion pipe is necessary, resulting in poor work efficiency. In addition to the problem of requiring labor and time, a large number of connection points are provided on the cables and hoses each time the cables and hoses are disconnected and reconnected. There is also a problem of increasing.

[0014] Such a problem also occurs not only in cables and hoses, but also in an excavation type propulsion device, in an excavation pipe for discharging earth and sand excavated by a tip device to a starting shaft. . In other words, it is necessary to connect and extend the discharge pipe in accordance with the propulsion distance excavated by the tip device. Similarly, it is necessary to connect the discharge pipe through the temporary propulsion pipe, which causes a problem that the working efficiency is low, human labor is required, and time is required.

The present invention has been made in view of the above,
The aim is to use a primary propulsion pipe consisting of a gutter-like part with a missing part and a cover as a temporary propulsion pipe, eliminating the need to attach, detach, and pull in cables and hoses for each additional primary propulsion pipe. Another object of the present invention is to provide a primary propulsion pipe and a drilling method in excavation of a small-diameter tunnel which achieves efficiency and economy.

[0016]

In order to achieve the above object, the present invention according to claim 1 uses a propulsion device equipped with a tip device for excavating underground and controlling the direction of excavation. In order to build a small-diameter tunnel for burying underground objects, including communication pipelines, sewer pipes, and gas pipes, without digging the ground, connect cables and hoses to the advanced equipment.・ By supplying drilling materials including hydraulic oil, control signals and electric power to the advanced equipment through hoses, they are successively added to the advanced equipment while advancing while excavating underground, and used for building tunnels. A primary propulsion pipe for excavation of a small-diameter tunnel, which is divided into two along the longitudinal direction of the pipe and has a substantially semi-cylindrical gutter-like portion having an opening formed in the longitudinal direction, and a gutter-like portion of the gutter-like portion. Close the opening Having a formed cover portion, storing cables and hoses in the gutter-like portion from the opening portion, and then closing the opening portion with the cover portion to integrally connect the gutter-like portion and the cover portion to unite; The gist of the present invention is that the entirety is formed in a cylindrical shape.

According to the first aspect of the present invention, the primary propulsion pipe includes a gutter-like portion having an opening and a cover closing the opening, and accommodates cables and hoses in the gutter-like portion from the opening. After that, in order to connect the gutter-shaped part and the cover part integrally by closing the opening part with the cover part, disconnection and reconnection of the cable and hose and the discharge pipe which were conventionally performed every time the primary propulsion pipe is added The connection of the primary propulsion pipe can be performed efficiently and quickly in a short period of time without requiring a lot of manpower, and automation of the connection work of the propulsion pipe becomes easy. In addition, since the disconnection and reconnection of the cables and hoses are eliminated, the number of connection points of the cables and hoses is greatly reduced, and the cost and supply loss due to the reduction in the number of parts can be reduced.

Further, the present invention described in claim 2 is the same as the claim 1.
In the present invention, the gutter-shaped portion and the cover portion are connected by a fitting groove and a fitting pin.

According to the second aspect of the present invention, since the gutter-like portion and the cover portion are connected by the fitting groove and the fitting pin, the two are not easily separated from each other, and the work is smoothly performed. be able to.

Further, according to a third aspect of the present invention, a communication line, a sewer pipe, and the like are provided underground using a propulsion device equipped with a tip device for excavating the ground and controlling the direction of excavation. In order to build a small-diameter tunnel for burying the buried object including the gas pipe without digging the ground, connect cables and hoses to the tip device, drilling material containing hydraulic oil through the cable and hoses, A drilling method for constructing a tunnel by successively adding a primary propulsion pipe to a tip device that advances while excavating underground by supplying a control signal and power to the tip device, and as a primary propulsion tube, A substantially semi-cylindrical gutter-like portion having an opening formed in the longitudinal direction, which is divided into two along the longitudinal direction of the pipe, and a cover portion formed so as to close the opening of the gutter-like portion. A primary propulsion pipe Following the tip device that moves forward while excavating underground, the gutter-shaped part and cover of the primary propulsion pipe are set, and cables and hoses are stored in the gutter-shaped part from the opening of this gutter-shaped part, The opening of the gutter-shaped part where the cables and hoses are stored is closed with a cover, and the two are integrally connected.
The gist is to construct a tunnel by feeding the primary propulsion pipes connected in this way to the tip device one after another.

According to the third aspect of the present invention, a primary propulsion pipe comprising a gutter-like portion having an opening and a cover closing the opening is provided, and the primary propulsion tube is inserted into the gutter-like portion from the opening of the primary propulsion tube. After storing the cables and hoses, cover the opening with the cover, connect the gutter-shaped part and the cover integrally, and continue the primary propulsion pipe thus connected to the tip device one after another. Since the tunnel is built by sending in, the disconnection and reconnection of cables and hoses and the connection of the discharge pipe, which were conventionally performed every time the primary propulsion pipe is added, are not required, so that many people are not required and efficient. In addition, the primary propulsion pipe can be quickly added in a short time, and automation of the connection of the propulsion pipe is facilitated. In addition, since the disconnection and reconnection of the cables and hoses are eliminated, the number of connection points of the cables and hoses is greatly reduced, and the cost and supply loss due to the reduction in the number of parts can be reduced.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the cable / hoses are stored in the gutter-like portion using a cable introduction pipe through which the cables / hoses are passed in advance. The gist is that it is performed.

According to the fourth aspect of the present invention, since the cables and hoses in the gutter-like portion are stored using the cable introduction pipe through which the cables and hoses are passed beforehand, when the tip device is operated. In addition to preventing flapping of cables and hoses in the primary propulsion pipe, it also eliminates the work required to collect cables and hoses when passing the cables and hoses through the primary propulsion pipe, thereby increasing efficiency. .

The present invention described in claim 5 provides the present invention in claim 4.
In the invention described in the above, the process of storing the cables and hoses in a gutter-like portion, closing the opening of the gutter-like portion in which the cables and hoses are stored with a cover portion, and connecting the both integrally is a gutter. The opening of the gutter is set downward and set in the loading / connection device, a cover is provided directly above the gutter, and the gutter with the opening facing downward is hung down toward the cable introduction pipe, and the cable introduction pipe Stop hanging the gutter at the position where it is completely stored in the gutter from the opening, move the cover to the opening of the gutter by the cover installation jack, and cover and semi-cylindrical body The gist is to concatenate

According to the fifth aspect of the present invention, the opening of the gutter is set downward, a cover is provided directly above the gutter, and the gutter is hung toward the cable introduction pipe. Lowering, stop hanging down the gutter-shaped portion at a position where the cable introduction pipe is completely housed in the gutter-shaped portion from the opening, for example, by rotating the gutter-shaped portion 180 degrees around the longitudinal axis with a rotation motor here. With the opening facing upward or with the opening facing down, the cover is moved to the gutter-like opening by the cover setting jack to connect the cover and the semi-cylindrical body.

Further, the present invention according to claim 6 provides the invention according to claim 4.
In the invention described in the above, the process of storing the cables and hoses in a gutter-like portion, closing the opening of the gutter-like portion in which the cables and hoses are stored with a cover portion, and connecting the both integrally is a gutter. With the opening of the gutter-shaped part facing downward, it is set to the loading / connecting device, a cover is provided on the lower side of the gutter-shaped part, and the gutter-shaped part with the opening downward is hung toward the cable introduction pipe, and the cable is introduced. Stop hanging the gutter at the position where the pipe is completely housed in the gutter from the opening, and move the cover sideways to just below the gutter to connect the cover and gutter. The point is to do.

According to the sixth aspect of the present invention, the opening of the gutter portion is set downward, a cover is provided on the lower side of the gutter portion, and the gutter portion faces the cable introduction pipe. At the position where the cable introduction pipe is completely housed in the gutter-like portion from the opening, the suspension of the gutter-like portion is stopped, and the cover portion is moved laterally to just below the gutter-like portion so that the cable guide pipe and the cover portion can be moved downward. The gutters are connected.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 are perspective views for explaining an excavation method using a primary propulsion pipe in small-diameter tunnel excavation according to an embodiment of the present invention. The excavation method of the present embodiment shown in FIG.
The primary propulsion pipe 1 composed of the gutter-like portion 1a and the cover portion 1b is used instead of the temporary propulsion pipe used in the conventional construction method shown in FIG. The primary propulsion tube 1 is divided into two along the longitudinal direction of the tube, and has a substantially semi-cylindrical gutter-like portion 1a having an opening 1c formed in the longitudinal direction, and an opening of the gutter-like portion 1a. In FIG. 1, the primary propulsion pipe 1 is provided with a gutter-like portion 1a at a lower portion, and a cover portion 1b at an upper portion.
A push table 6, a propulsion jack 7, and a cable introduction pipe 4 are provided between the two, and a cable / hose 3 is passed through the cable introduction pipe 4, and the cable / hose 3 is a cable feeding device. It is to be fed from 5.

Here, the primary propulsion pipe 1 is shown in FIGS.
This will be described with reference to FIG. As shown in FIG. 3, the primary propulsion pipe 1 includes a gutter-like section 1a and a cover section 1b which are formed by dividing the pipe in the longitudinal direction. As shown in the cross section in FIG. 4A, the cover portion 1b has both side portions extending downward to form side wall portions 1d, 1d.
4D, a plurality of fitting grooves 12 are formed as shown in FIG.

As shown in FIG. 5, fitting pins 13 are formed on both sides of the opening 1c of the gutter-like portion 1a. When the cover 1b is aligned with the opening 1c of the gutter 1a and the opening 1c is closed by the cover 1b, the fitting groove 13 of the cover 1b is fitted to the fitting pin 13 of the gutter 1a. Thereby, the gutter-like portion 1a and the cover portion 1b are completely connected so as not to be easily separated, and the tubular primary propulsion tube 1 is completed completely.

Returning to FIG. 1 and FIG. 2 again, a construction method using the primary propulsion pipe 1 configured as described above will be described. In FIG. 1, the push table 6 and the propulsion jack 7 are set at the bottom of the starting shaft 41, for example, as described with reference to FIG. 15, and the cable feeding device 5 is located above the ground outside the starting shaft 41. It is installed in. The cables / hoses 3 fed from the cable feeding device 5 pass through the cable introduction pipe 4, and the tip is connected to a not-shown tip device. The cable introduction pipe 4 is provided in order to collect the cables and hoses 3 so as to easily enter the gutter-like portion 1 a of the primary propulsion pipe 1, and is formed at the center of the push table 6. A part extends to the rear part of the push table 6 through the concave portion 6a. Although the propulsion jack 7 is shown only on the right side of the push table 6 with the concave portion 6a interposed therebetween, the propulsion jack 7 is similarly provided on the left side, so that the drawing is simplified. It has been omitted.

After setting the gutter-like portion 1a of the primary propulsion pipe 1 to the push table 6 and the propulsion jack 7 set in the starting shaft 41 and the like as shown in FIG. 1, the cable introduction pipe 4 is opened from the opening 1c. The cable introduction pipe 4 is set in the gutter-like portion 1a, as shown in FIG. Then, as shown by an arrow 43 in FIG. 2A, the cover portion 1b of the primary propulsion pipe 1 is lowered onto the opening 1c of the gutter-like portion 1a, and as shown in FIG.
Is set so as to close the opening 1c of the gutter-like portion 1a. When both are set in this manner, the fitting groove 12 and the fitting pin 13 shown in FIGS.
And the cover part 1b are integrally connected, and the primary propulsion pipe 1 is completed. The cable introduction pipe 4 through which the cables and hoses 3 are passed is set in the primary propulsion pipe 1 completed as described above.

When the cables and hoses 3 are set in the primary propulsion pipe 1 as described above, the cables and hoses 3 are inserted into the primary propulsion pipe 1 through the opening 1c, and are connected to a tip device (not shown). Cables and hoses 3
There is no need to disconnect or reconnect as in the prior art every time the user tries to put the device into the primary propulsion pipe 1, and the user can pass through the primary propulsion pipe 1 while being connected to the leading end device. Not only do many connection points disappear,
The setting of the cables and hoses 3 in the primary propulsion pipe 1 can be performed efficiently and quickly in a short time. It is needless to say that the above-mentioned discharge pipe can be introduced into the gutter-like part 1a from the opening 1c similarly to the cables and hoses 3.

Next, referring to FIGS. 6 to 8, the cables and hoses 3 are stored in the gutter-like portion 1a of the primary propulsion tube 1, and the opening 1c is closed with a cover portion 1b to integrate the primary propulsion tube. A description will be given of the automation of the process of dynamically connecting.

In this automatic processing, the gutter-like portion 1a of the primary propulsion pipe 1 is set in the loading / connecting device 14 with its opening 1c facing downward, and the cover portion 1b is directly above the cover 1b by the cover installation jack 16. Is held. Further, the loading / connecting device 14 is provided with a rotation motor 15 for rotating the gutter-like portion 1a later. Further, a push table 6, a propulsion jack 7, a cable introduction pipe 4 and the like shown in FIG. 1 are provided below these devices, and the cables and hoses 3 are passed through the cable introduction pipe 4. One end of the cable / hoses 3 is connected to a tip device (not shown), and the other end is wound around a cable feeding device 5 and is fed from the cable feeding device 5.

In such a configuration, the gutter-like portion 1a is set in the carrying-in / connection device 14 with the opening 1c facing downward, and the cover portion 1b is directly above the cover installation jack 16
, The entire loading / connecting device 14 is moved to the gutter-like portion 1a.
7 and the cover 1b are suspended toward the cable introduction pipe 4 as indicated by an arrow 44 in FIG.
As shown in FIG.
c and enters the gutter-shaped portion 1a and stops at a predetermined position set.

Then, after the cable introduction pipe 4 is set in the gutter-like portion 1a in this way, when the gutter-like portion 1a is rotated by 180 degrees by the rotating motor 15, the gutter-like portion 1a is shown in FIG. 7 (b). Opening 1c is directed upward. After the gutter-like portion 1a of the primary propulsion pipe 1 faces upward including the cable introduction pipe 4, the cover portion 1b is lowered by the cover installation jack 16 so that the cover portion 1b closes the opening 1c of the gutter-like portion 1a. When set to, as shown in FIG.
The cover part 1b is set on the opening 1c of the gutter-like part 1a,
The cover portion 1b and the gutter-like portion 1a are integrally connected by fitting the fitting groove 12 and the fitting pin 13 described above to complete the primary propulsion pipe 1.

By using such an automatic fitting method, the loading position of the gutter-like portion 1a and the cover portion 1b of the primary propulsion pipe 1 and the fitting position of the cover portion 1b to the gutter-like portion 1a are automatically set. Thus, the propulsion pipe can be set efficiently and quickly without damaging peripheral equipment such as the cable introduction pipe 4.

Next, the processing procedure shown in FIGS. 6 to 8 will be described more specifically with reference to FIGS. 9 to 14 show the push table 6, the propulsion jack 7, the cable feeding device 5, and the gutter-like portion 1a of the primary propulsion pipe 1 shown in FIGS.
The cover 1b is shown from the side and is set in the starting shaft 41, but the loading / connecting device 14, the rotating motor 15, and the cover installation jack 16 are omitted. 9 to 13, the primary propulsion pipe which is set in the starting shaft 41 and is added before the primary propulsion pipe 1 to be added, and the gutter-like portion 1a and the cover portion 1b are connected. 1 is almost pushed out from the starting shaft 41 and is shown at the left end of the figure.
The power unit 11 shown in FIGS.
Is shown in the vicinity. Further, in the starting shaft 41, there is shown a main pushing device 9 configured with the push table 6 and the propulsion jack 7.

In FIG. 9, first, the gutter-like portion 1a constituting the primary propulsion pipe 1 is set downward, as in FIG. 6, and the cover portion 1b is held by a cover installation jack 16 (not shown) directly above it. FIG. 6 shows a push table 6 that constitutes the main push device 9 together with the propulsion jack 7 set in the starting shaft 41.
As shown in the figure, the cable introduction pipe 4 into which the cables / hoses 3 are inserted is set. The cables and hoses 3 passing through the cable introduction pipe 4 are connected to the rear end of a tip device (not shown) through the primary propulsion pipe 1 in a state where one end is almost pushed out from the starting shaft 41. The end is wound around the cable feeding device 5.

The gutter-like part 1a and the cover part 1b set as described above have the gutter-like part 1a with the opening 1c set downward, as shown in FIG.
, And the cable introduction pipe 4 is taken into the gutter-like portion 1a as shown in FIG. In addition,
In this case, the rear end of the gutter-shaped portion 1a is set so as to abut on the push table 6. Next, the cable introduction pipe 4 is connected to the opening 1.
The gutter-shaped portion 1a taken in from c is rotated by 180 degrees as described with reference to FIG. 7, and the opening 1c faces upward. Then, the cover portion 1b is lowered onto the opening 1c facing upward, and the cover portion 1b is attached to the gutter-like portion 1a.
As shown in FIG. 11, the cover 1b is set on the opening 1c of the gutter-like portion 1a, and the cover 1b and the gutter-like portion 1a are fitted as described above. Groove 1
2 and the fitting pins 13 are fitted together and integrally connected to complete the primary propulsion tube 1.

When the gutter-like portion 1a and the cover portion 1b are connected as described above to complete the primary propulsion tube 1 in which the cable introduction pipe 4 has passed, the primary propulsion tube 1 contacts the push table 6 The rear end portion is propelled forward by the propulsion jack 7 and the push table 6 set in the original pushing device 9 as shown by an arrow 45 in FIG. The distal end of the primary propulsion pipe 1 propelled in this manner is connected to the rear end of the primary propulsion pipe 1 which is first extended and almost pushed out from the starting shaft 41 as shown in FIG.
As shown in FIG. 2, the primary propulsion tube 1 is further pushed and propelled, and the tip of the newly added primary propulsion tube 1 exits the starting shaft 41 as shown in FIG. It will promote inside. Then, when further propelled, the newly added primary propulsion pipe 1 is also propelled until it is almost pushed out from the starting shaft 41 as shown in FIG. 14, where the next primary propulsion pipe 1 is processed as described above. Is set in the starting shaft 41 by the same processing as described above, the cable introduction pipe 4 is taken in, and the propulsion jack 7
And the operation of being propelled by the push table 6 is repeatedly performed, whereby a plurality of primary propulsion pipes 1 are successively added, and a temporary tunnel including a plurality of primary propulsion pipes 1 between the starting shaft 41 and an arrival shaft (not shown). Is formed. After the provisional tunnel is formed in this way, FIGS.
As described with reference to FIG. 22, the primary propulsion pipe 1 is replaced with the main propulsion pipe, whereby the tunnel is completed.

In the propulsion process of the primary propulsion pipe 1 shown in FIGS.
Does not move in conjunction with the pusher 6 and remains at the first predetermined position. The cables and hoses 3 follow the advance of the tip device buried in the ground in front, and are unwound from the cable unwinding device 5 via the cable introduction pipe 4 without being detached as in the related art. It has become.

By repeatedly performing the above processing,
Each time the primary propulsion pipes 1 are added one after another, the cables and hoses 3 can be taken into the primary propulsion pipe 1 and passed through without detaching and reconnecting the cables and hoses 3 and reconnecting them. It can be performed efficiently, quickly and in a short time without using humans.

When operating the tip device, the cable
Since a predetermined pressure is generated in a fluid such as hydraulic oil or air passing through the hoses 3, the cable and hoses 3 may considerably flap due to the pressure.
In the present embodiment, since the cables and hoses 3 are passed through the cable introduction pipe 4, such fluttering can be suppressed, and the cables and hoses 3 are passed through the primary propulsion pipe 1. In this case, it is not necessary to perform the work required for collecting the cables and hoses 3 and efficiency can be improved.

It should be noted that the above-described embodiment, particularly FIGS.
In 4, the primary propulsion pipe 1 sets the cover portion 1 b directly above the gutter-like portion 1 a with the opening 1 c downward, and the gutter-like portion 1 a
After being taken into the cable introduction pipe 4, the gutter-like portion 1a
Is rotated 180 degrees, and the cover 1b is lowered onto the opening 1c facing upward to connect the gutter-like portion 1a and the cover 1b, but the present invention is not limited to such a method. For example, the primary propulsion pipe 1 sets the gutter-like part 1a with the opening 1c facing downward in the loading / connecting device 14, and sets the cover part 1b on the lower left or right, that is, on the lower side, and sets the gutter-like part. The suspension of the gutter-like portion 1a is stopped at the position where 1a completely stores the cable introduction pipe 4, and the cover portion 1b is laterally moved by a jack or the like to a position directly below the opening 1c of the gutter-like portion 1a. The cover 1b may be set to the opening 1c of the gutter 1a by the installation jack 16, and the gutter 1a and the cover 1b may be connected to complete the primary propulsion pipe 1.

[0047]

As described above, according to the present invention,
The primary propulsion pipe is composed of a gutter-like part having an opening and a cover that closes the opening. After storing cables and hoses in the gutter-like part from the opening, the opening is closed with the cover, and the gutter-like part is closed. And the cover part are integrally connected, so each time the primary propulsion pipe is added, disconnection and reconnection of cables and hoses and connection of the discharge pipe are unnecessary, eliminating the need for many labors. The primary propulsion pipe can be efficiently and quickly added in a short time. In particular, the construction period can be shortened, economy can be achieved, and the connection work of the propulsion pipes can be easily automated. In addition, since the disconnection and reconnection of the cables and hoses are eliminated, the number of connection points of the cables and hoses is greatly reduced, and the cost and supply loss due to the reduction in the number of parts can be reduced.

Further, according to the present invention, since the gutter-like portion and the cover portion are connected by the fitting groove and the fitting pin, the primary propulsion tube is completely connected without being easily detached. Construction can be performed smoothly.

Further, according to the present invention, a primary propulsion pipe comprising a gutter-like portion having an opening and a cover closing the opening is provided, and a cable and a cable are inserted from the opening of the primary propulsion tube into the gutter-like portion.
After storing the hoses, cover the opening with the cover part, connect the gutter-shaped part and the cover part integrally, and send the primary propulsion pipe connected in this way to the tip device one after another. Since the tunnel is constructed, every time the primary propulsion pipe is added, the conventional disconnection and reconnection of cables and hoses and connection of the discharge pipe are not required. The primary propulsion pipe can be added quickly in a short time. In particular, the construction period can be shortened,
The economy can be achieved, and the connection work of the propulsion pipe can be easily automated. In addition, since the disconnection and reconnection of the cables and hoses are eliminated, the number of connection points of the cables and hoses is greatly reduced, and the cost and supply loss due to the reduction in the number of parts can be reduced.

According to the present invention, the cables and hoses are stored in the gutter-shaped portion using the cable introduction pipe through which the cables and hoses are passed in advance. The flapping can be suppressed, and the work required for collecting the cables and hoses when the cables and hoses are passed through the primary propulsion pipe is not required, and the efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining one step of an excavation method using a primary propulsion pipe in excavating a small-diameter tunnel according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a step following FIG. 1 of the excavation method shown in FIG. 1;

FIG. 3 is a side view showing a primary propulsion pipe used in the excavation method shown in FIG.

4 is a cross-sectional view and a side view of a cover portion of the primary propulsion pipe shown in FIG.

5 is a cross-sectional view of the primary propulsion pipe shown in FIG.

FIG. 6 is a perspective view showing one step of an excavation method according to another embodiment of the present invention.

7 is a perspective view showing a step following the step shown in FIG. 6 of the excavation method shown in FIG. 6;

FIG. 8 is a perspective view showing a step following the step shown in FIG. 7 of the excavating method shown in FIG. 6;

FIG. 9 is a side view showing one step of the excavation method shown in FIG. 6 in further detail.

10 is a side view showing a step following the step shown in FIG. 9 of the excavation method shown in FIG. 9;

11 is a side view showing a step following the step shown in FIG. 10 of the excavating method shown in FIG. 9;

12 is a side view showing a step following the step shown in FIG. 11 of the excavation method shown in FIG. 9;

FIG. 13 is a side view showing a step following the step shown in FIG. 12 of the excavation method shown in FIG. 9;

FIG. 14 is a side view showing a step following the step shown in FIG. 13 of the excavation method shown in FIG. 9;

FIG. 15 is a sectional view showing one step of a conventional excavation method.

16 is a sectional view showing a step following the step shown in FIG. 15 of the conventional excavation method shown in FIG. 15;

17 is a sectional view showing a step following FIG. 16 of the conventional excavation method shown in FIG. 15;

18 is a cross-sectional view showing a step that follows the step shown in FIG. 17 of the conventional excavation method shown in FIG. 15;

FIG. 19 is a sectional view showing a step following FIG. 18 of the conventional excavation method shown in FIG. 15;

20 is a sectional view showing a step following the step shown in FIG. 19 of the conventional excavation method shown in FIG. 15;

21 is a sectional view showing a step following FIG. 20 of the conventional excavation method shown in FIG. 15;

FIG. 22 is a cross-sectional view showing a step that follows the step shown in FIG. 21 of the conventional excavation method shown in FIG. 15;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Primary propulsion pipe 1a Gutter-like part 1b Cover part 1c Opening 3 Cable / hose 4 Cable introduction pipe 6 Push table 7 Propulsion jack 9 Main pushing device 12 Fitting groove 13 Fitting pin 14 Loading / connecting device 15 Rotary motor 16 Cover installation jack 23 Advanced equipment

Claims (6)

[Claims] 1. A buried object including a communication pipeline, a sewer pipe, and a gas pipe is buried underground by using a propulsion device equipped with a tip device for digging the ground and controlling the direction of digging. To build a small-diameter tunnel for burying without digging, connect cables and hoses to the tip device and supply drilling material including hydraulic oil, control signals and power to the tip device through the cables and hoses A primary propulsion pipe in a small-diameter tunnel excavation used for building a tunnel, which is successively added to a tip device advancing while excavating in the ground, and which is used along the longitudinal direction of the pipe. A substantially semi-cylindrical gutter-like portion having an opening formed in the longitudinal direction, and a cover portion formed so as to close the opening of the gutter-like portion; Cable A small tubular body which is formed as a whole by closing the opening portion with the cover portion and integrally connecting and combining the gutter-like portion and the cover portion. Primary propulsion pipe for bore tunnel excavation. 2. The primary propulsion pipe according to claim 1, wherein the gutter-like portion and the cover portion are connected by a fitting groove and a fitting pin. 3. A buried object including a communication pipe, a sewer pipe, and a gas pipe is buried underground using a propulsion device equipped with a tip device for digging the ground and controlling the direction of digging. To build a small-diameter tunnel for burying without digging, connect cables and hoses to the tip device and supply drilling material including hydraulic oil, control signals and power to the tip device through the cables and hoses A method of digging and constructing a tunnel by adding a primary propulsion pipe one after another to a tip device that advances while excavating underground by performing a drilling operation, wherein two primary propulsion pipes are arranged along a longitudinal direction of the pipe. And a primary propulsion pipe comprising a substantially semi-cylindrical gutter-like portion having an opening formed in the longitudinal direction and a cover portion formed so as to cover the opening of the gutter-like portion, Advance while drilling A gutter-shaped part and a cover part of the primary propulsion pipe are set following the leading end device, cables and hoses are stored in the gutter-shaped part from the opening of the gutter-shaped part, and the gutter containing the cables and hoses is stored. Excavation characterized by the fact that the opening of the shape is closed with a cover and the two are integrally connected, and the primary propulsion pipe connected in this way is continuously fed into the tip device one after another to build a tunnel. Construction method. 4. The excavation according to claim 3, wherein the storage of the cables and hoses in the gutter-shaped portion is performed using a cable introduction pipe through which the cables and hoses are passed in advance. Construction method. 5. A process for accommodating the cables and hoses in a gutter-like portion, closing the opening of the gutter-like portion in which the cables and hoses are accommodated by a cover portion, and integrally connecting the two. With the opening of the gutter-shaped part facing downward, it is set as a loading / connecting device, a cover part is provided directly above the gutter-shaped part, and the gutter-shaped part with the opening facing downward is hung down toward the cable introduction pipe. The hanging of the gutter is stopped at a position where the gutter is completely stored in the gutter from the opening, and the cover is moved to the opening of the gutter by the cover setting jack, and the cover and the semi-cylindrical body are moved. The excavation construction method according to claim 4, wherein 6. A process of storing the cables and hoses in a gutter-like portion, closing the opening of the gutter-like portion in which the cables and hoses are stored with a cover portion, and connecting the both integrally. With the opening of the gutter facing downward, it is set as a carry-in / connection device, a cover is provided on the lower side of the gutter, and the gutter with the opening facing downward is hung down toward the cable introduction pipe, and the cable is introduced. Stop the hanging of the gutter at the position where the pipe is completely stored in the gutter from the opening, and move the cover sideways to just below the gutter to connect the cover and gutter. The excavation method according to claim 4, wherein the excavation is performed.