JP2003214088A - Driving burying method for underground burying conduit and its driving burying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent mutual separation of conduit materials and simplify a connecting part structure by sequentially driving conduit materials from the rear following towing when burying a long-distance conduit underground. <P>SOLUTION: An expander chuck body 10 is connected with a back reamer 1 towing and advancing in a pilot drift H excavated by a non-cut and cover method, the conduit materials P are sequentially joined to the expander chuck body 10, and the connected conduit materials P are drawn in the pilot drift H. At this point, rear ends of driving bolts 21 and 23 joined to the expander chuck body 10 and additionally fastened in sequence in the conduit materials P per each conduit material P are detachably fixed via a driving disc 25 at rear end openings of the conduit materials P to be connected. By towing the driving bolts 21 and 23 by the expander chuck body 10, the conduit material P are driven in the pilot drift H from a rear side by the driving disc 25. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a polyethylene resin which is buried in the ground to protect and store various wirings such as a communication cable and a power line when the wiring is buried in the ground in a roadside strip or the like. When directly embedding pipes by non-open cutting method, multiple polyethylene resin pipes that are prepared as short length units are continuously supplied while being connected at the embedding site, enabling underground embedding. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for indenting and embedding a pipe material for a pipe.

[0002]

2. Description of the Related Art Recently, in burying various pipes such as gas pipes and water pipes in the ground, in order to meet social demands such as reduction of environmental load, reduction of road construction, and shortening of construction period. ,
Various induction-type non-cutting construction methods are being implemented in which burial work is performed without cutting without excavating the road surface. In this non-excavation method, the drill head that penetrates into the ground from the starting elevation is controlled by electromagnetic induction from the ground surface to properly control the depth, direction, and inclination, etc. It is said that the predetermined pipes connected to the pipe drawing jig attached to the drill head are pushed and buried while unraveling the earth and sand by the back reamer that rotates and retreats.

When burying pipes by such a non-open cutting method, if the pipes are flexible and continuous and long, the ends of the pipes of a predetermined length are connected to a back reamer. If the back reamer retreats, the work for burying the pipes by pushing is completed.

[0004]

However, if each of the pipes to be buried is of a short length and is not continuously formed into an integrally long length, it must be connected in advance so as to be in a continuous state. I have to. However, for example, the polyethylene resin pipe material buried to store and protect communication cables and the like has only one unit material, for example, to enable transportation by a truck or the like to a site or the like. With a diameter of about 300 mm and a length of about 8000 to 1
It is about 2000 mm. At the burying site, the ends of the heat-melted pipe material as a unit material are welded and connected to each other to form a predetermined length so as to be suitable for long-distance burying. However, even if it is connected to a predetermined length, it cannot be wrapped in a winding shape because its flexibility is extremely small.For example, the work site is narrow, there is a lot of traffic, and a work place can be secured. In the case of no case or the like, it is difficult to temporarily store the long shape.

Further, since the pipe line material is set to a short predetermined length, the ends of each of the plurality of pipe line materials are heated and melted to be butt-connected to each other, but for solidification connection, the ends thereof are mutually connected. A certain maintenance / waiting time is required for butt connection. Therefore, when the pipe line material is directly pulled in, the pulling-in work must be interrupted at each time corresponding to the waiting time required for the solidification of the connecting portion, and the solidifying and connecting work must be performed. Therefore, such burial work is generally inefficient, and not only can work time be wasted, but also when the melted connection parts are not firmly solidified, the resistance to pulling into the ground is reduced. It was sometimes separated and dismantled due to the action. Moreover, according to such a pulling-in method, the pulling-in force must be increased as the pulling-in length becomes longer, so that the equipment / equipment for making the connection structure in which the tensile stress to withstand the pulling-in force is set to be large, for example, When working on the roadside belt, it was difficult to adequately respond because the installation conditions were restricted.

[0006] In order to eliminate such a point, it has been proposed to connect the pipe line members with each other by a connecting means that does not rely on heating and melting, while carrying out the drawing operation. However, in the case of using this connecting means, the connection must be made in a very solid state so as to prevent the unintentional separation of the connecting parts, and if the connecting work is performed without interrupting the pulling work, those devices should be connected. The handling structure, etc., must be simple, and in any case, the connection means proposed in the past could not sufficiently meet these demands.

Therefore, the present invention was created in view of the various existing conditions as described above. Since the work site is narrow, it is not possible to secure a storage place for long-sized conduits and the like. Also, when embedding a long distance in the ground by embedding, the pipe structure is pushed from the rear side so that tensile stress does not act on the connection part and the connection structure is simplified. Additional connection can be made, and in addition, by separating the connected pipe materials by pushing in from the terminal side of the pipe material to be connected and buried,
Dismantling can be prevented, and the burial work can be performed continuously without interruption. Not only can the burial work by the non-open cutting method be more convenient, but also the pipe as a unit material It is possible to construct a stable and integrated long pipe line by embedding it by connecting the road materials in a surely connected state and without separating or separating due to various resistances that may be generated by pushing. It is an object of the present invention to provide a method of indenting and embedding a pipeline material for underground burying, and an indenting and embedding device thereof.

[0008]

In order to achieve the above-mentioned object, in the method of indenting and burying a conduit material for underground burial according to the present invention, an advanced tunnel H that is excavated by a non-excavation method is used.
For underground embedding in which pipe materials P are sequentially connected to an expander chuck body 10 that is connected to a back reamer 1 that is advanced by being pulled inside, and the connected pipe materials P are inserted into an advanced tunnel H. This is a method for pushing and embedding a pipeline material, in which the rear ends of the push-in bolts 21 and 23 that are linked to the expander chuck body 10 and are additionally tightened in the pipeline material P sequentially for each pipeline material P are connected. The conduit material P is fixed at the rear end opening, and the conduit material P is advanced from the rear side by the pushing bolts 21 and 23 pulled by the expander chuck body 10.
It is to push it inside. More specifically, the first conduit material P is connected to the expander chuck body 10 that is connected to the back reamer 1 that advances by being pulled in the advanced tunnel H that is excavated by the non-opening method, and the expander is also connected. The rear end of the base push-in bolt 21 which is linked to the chuck body 10 and is inserted through the first conduit material P is moved out from the rear end opening portion of the first conduit material P, and at this rear end opening portion. First to fix
The connecting and fixing step, the pushing step of pushing the first conduit material P into the advanced tunnel H through the base pushing bolt 21 by the pulling of the back reamer 1, and the first pushing by the rear end of the base pushing bolt 21 after pushing. Of the second conduit member P is released from the first conduit member P, the second conduit member P is connected to the rear end of the first conduit member P, and the base pushing bolt 21 is connected to the inside of the second conduit member P. By the second connecting and fixing process in which the rear end of the inserted connecting push-in bolt 23 is moved out from the rear end opening of the second conduit material P and is fixed again at this rear end opening, and the back reamer 1 is pulled. Connection push bolt 23
The second step of pushing the second conduit material P into the advanced tunnel H via the pushing step, and after the pushing, the fixation of the second conduit material P by the rear end of the connecting pushing bolt 23 is released, and the second connection fixing. In the same manner as in the process, the pipe material P is additionally connected in sequence, and additionally fastened to the connection push bolt 23, and the rear end of the connection push bolt 23 inserted through the pipe material P is ejected from the pipe material P and again. Fix it, and connect it with the back reamer 1.
It is comprised of an additional connection / pushing step in which the pipe material P additionally connected via 3 is repeatedly pushed into the advanced tunnel H. Further, in the indentation burying device for the underground burying pipe material used directly in the above indentation burying method, the back reamer 1 which is advanced by being pulled in the advanced tunnel H excavated by the non-open cutting method. And an expander chuck body 10 which is connected to the back reamer 1 and connects the conduit material P to be embedded by pushing, and the expander chuck body 10 is additionally additionally fastened in order for each conduit material P and sequentially buried. The push-in bolts 21 and 23 that come out from the rear end opening of each end pipe material P are fixed at the rear end opening of each end pipe material P,
The back reamer 1 is provided with a pushing means (pushing device) 20 for pushing the pipe material P from the rear side. The expander chuck body 10 has a chuck body 11 formed in a substantially conical shape with a small diameter on the front side.
And the chuck body 1 from the front side of the chuck body 11.
1 is provided with a connecting bolt 12 that is screwed and inserted so as to be freely rotatable, and a biting engagement surface 15 on the outer peripheral surface, and is provided on the rear end side of the chuck body 11 so as to expand when the connecting bolt 12 enters. The chuck portion 14 provided and the chuck sleeve 1 fitted on the outer periphery of the conduit material P fitted on the outer periphery of the chuck portion 14 in correspondence with the chuck portion position.
6 and a bolt connecting portion 17 that connects the pushing means 20. The pushing means 20 includes a base pushing bolt 21 connected to the bolt connecting portion 17 of the expander chuck body 10, and a connecting nut 2 at the rear end of the base pushing bolt 21.
A plurality of connecting push-in bolts 23 are sequentially added and connected via 4 and a rear end opening of each sequentially buried terminal pipe material P is detachably attached to the rear end opening. And a pushing board 25 fastened to the ends of the pushing bolts 21 and 23. Pipe line material P is provided at either one of the open ends,
It is possible to form the step-shaped connecting portion P1 that is expanded outwardly to the extent that it corresponds to the wall thickness of the pipe material P itself. The connecting nut 24 can be configured so that the front and rear ends of the push bolts 21 and 23 arranged in the front and rear along the pushing direction are screwed to each other in the front and rear portions. The material P can be formed to have a length substantially corresponding to the length of the material P. The pushing board 25 covers the rear end opening of the end pipe material P, and is screwed to the rear end opening portion at the rear end portions of the push bolts 21 and 23 that go out from the rear end opening portion of the end pipe material P. It can be configured to be stopped.

In the underground burying method and indenting apparatus for embedding underground material according to the present invention configured as described above, a predetermined pipeline is formed in the advanced tunnel H formed by the non-excavation method. Back reamer 1 when inserting material P
The conduit material P in which the pushing means 20 for connection is sequentially and additionally connected to the expander chuck body 10 pulled by
Is pushed in from the rear end side of the pipe material P at its end, and is inserted into the advanced guideway H for piping. When the first conduit material P is inserted and piped in the advanced tunnel H, the expander chuck body 1
0 firmly connects the pipe material P by the front end,
Further, the base push-in bolts 21 of the pushing means 20 are connected to each other, and the base push-in bolts 21 corresponding to the length of the pipe line material P are moved out from the rear end opening portions of the pipe line material P so that the rear end opening portions are opened. It is screwed and fastened to the pushing board 25 of the pushing means 20. The pulling of the back reamer 1 with respect to the expander chuck body 10 pulls the base push-in bolt 21 and, as a result, pulls the push-in board 25 arranged on the rear end side thereof, and the rear end of the pipe material P fixing the push-in board 25. The opening is pushed in from the rear side and inserted into the advanced tunnel H so that it is pushed in. At the time of pushing the pipe material P into the advanced tunnel H for piping, another pipe material P connected to the pushed pipe material P was fastened to the rear end of the pushed pipe material P. The push-in board 25 is once removed, and the push-in board 25 is fixed again at the rear end of the other connecting push-in bolt 23 that is additionally connected to the push-in bolts 21 and 23 in the pipeline material P. The pushing action by pulling the back reamer 1 is exerted on the rear end opening. Since the pipe material P and the push bolts 21 and 23 are set to have substantially the same lengths corresponding to each other, the push bolts 21 and 23 which are sequentially and additionally connected to the end openings of the pipe material P to be additionally connected in sequence are similarly provided. The rear end is located, and the pusher plate 25 is fastened to each rear end opening of the connected pipe material P at the end.
The connecting portion P1 that is released and is provided at the one end opening of the conduit material P has the other conduit material P arranged along the front-rear direction.
The fitting between the push-in bolts 21 and 23 and the mutual connection of the pipe line materials P are performed only by fitting with each other. The connecting nuts 24 having a reverse screw structure in the front and rear portions are aligned with the end portions of the push-in bolts 21 and 23 arranged in the front and rear portions and rotated in either direction to be fastened or released.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, referring to the drawings, an embodiment of the present invention will be described. Reference numeral 1 shown in the drawing is drawn so as to be retracted along the advanced guide H, and the drawing is performed. This is a back reamer for inserting and embedding a conduit material P such as a tube made of high-density polyethylene resin by opening and cutting the advanced shaft H while being rotated at times. This back reamer 1 is
For example, a starting shaft S and a reaching shaft R where a pipe material P should be buried along an advanced tunnel H that has been excavated in the ground by a non-cutting method such as an induction horizontal boring method (HDD method ... so-called tera-jet method). And the pipe material P by the traction mechanism of the drill rack machine D installed on the side of the starting shaft S.
Is connected to the starting shaft R side to the starting shaft S side.

The back reamer 1 itself is formed in the shape of a cone having a spiral drill formed on the outer peripheral surface thereof, and has a traction connecting portion 2 to the drill rack machine D at the tip and an expander chuck at the rear end via a swivel tool 4. Each is provided with the connection part 3 which connects the body 10, and is formed by the super hard material.

The expander chuck body 10 has a connecting portion 3
The chuck body 11 is formed in a substantially conical shape with the side at the top, and the connecting bolt 12 is connected by being screwed into the chuck body 11 from the small side of the chuck body 11 so as to be rotatable. And a chuck portion 14 provided on the rear end side of the chuck body 11 so as to be expanded by the entry of the connecting bolt 12 and a pipe line fitted to the outer periphery of the chuck portion 14 A chuck sleeve 16 is fitted on the outer periphery of the material P corresponding to the chuck position, and a pushing means 20, that is, a bolt connecting portion 17 that connects pushing bolts 21 and 23 described later.

The chuck body 11 has a substantially frustoconical shape whose diameter gradually increases from the leading end side to the trailing end side. From the leading end side, a connecting bolt arranged along the longitudinal direction of the chuck body 11. 12 is screwed in. Further, the tip of the connecting bolt 12 is crushed into a flat shape, for example, in order to rotate the connecting bolt 12 itself, and a connecting hole 13 for connecting the swivel tool 4 or the like via a chain or chain lock is opened. ing.

The chuck portion 14 is integrally formed with the chuck body 11 and is formed into a substantially cylindrical shape so that the connecting bolt 12 can be inserted therein, and the inner peripheral diameter gradually decreases toward the rear end side. And a proper number of slits are cut out along the front-back direction. Further, as shown in the figure, the biting engagement surface 15 formed on the outer peripheral surface is provided on the leading side of the chuck body 11 with a locking surface 15A that is substantially orthogonal to the front-back direction of the chuck body 11 itself and on the rear end side of the chuck body 11. As the diameter of the chuck 14 gradually decreases, the cross-section of the engaging surface 15A and the push-in inserting surface 15B that is continuous from the outer peripheral edge of the engaging surface 15A have a substantially V-shaped cross section. There is. The maximum diameter of the biting engagement surface 15 is not larger than the inner diameter of the pipe material P to be connected. When the connecting bolt 12 is screwed into the chuck portion 14 from the leading end side, the width of the slit is widened and the whole is expanded.
As a result, the conduit material P fitted on the outer circumference of the chuck portion 14 is pushed out from the inner circumference (see FIG. 2).

The chuck sleeve 16 has an inner peripheral diameter that is not smaller than the outer peripheral surface diameter so that it can be fitted to the outer peripheral surface of the conduit material P, and the conduit material P that is expanded by the chuck portion 14 that is expanded. Since the outer periphery of the pipe is restrained from being closed, the conduit material P is sandwiched from inside and outside together with the chuck portion 14, so that the conduit material P is firmly fastened to the chuck portion 14.

The bolt connecting portion 17 is, for example, the connecting bolt 12
The shackle structure is provided at the rear end of the shackle structure. The shackle structure locks the base pushing bolt 21 of the pushing means 20, which will be described later, by inserting and locking it in the connecting portion 22 of the tip portion of the base pushing bolt 21 so as to connect them. It is as a thing. The bolt connecting portion 17 is provided with swivel means 18 so as to avoid twisting due to rotation of the chuck portion 14 or the pushing means 20 after the connection.

In addition to the expander chuck body 10 thus constructed, the conduit material P connected to the expander chuck body 10 is inserted into the inside of the conduit material P and is additionally connected to each of the conduit materials P which are sequentially embedded. Pipe material P
A pushing means (pushing device) 20 for pushing the whole is provided. The pushing means 20 includes a base pushing bolt 21 directly connected to the bolt connecting portion 17, and a plurality of connecting pushing bolts 23 sequentially added to the rear end of the base pushing bolt 21 via a connecting nut 24. , A cap is detachably attached to the rear end opening of each end pipe material P that is additionally embedded in sequence by pushing and embedding, and is screwed to the ends of the push-in bolts 21 and 23 that go out from the rear end opening. Pushing board 2 to be fastened
5 and 5.

The base push-in bolt 21 is an eyebolt in which the connecting portion 22 that is connected to the bolt connecting portion 17 of the expander chuck body 10 is screwed to the tip of the base push-in bolt 21 with a nut similar to the connecting nut 24 described later. It is provided as a structure. By doing so, the entire base push-in bolt 21 becomes the expander chuck body 1.
It is slightly longer than the length of the first conduit material P to be connected to 0, and the rear end portion protruding from the rear end of the conduit material P is formed as at least a male screw. Although not shown, the connecting portion 22 can also be formed by crushing the tip end portion of the base pushing bolt 21 into a flat shape and forming a hole for connecting to the crushed portion.

The connecting push-in bolts 23 are sequentially and additionally connected to the base push-in bolts 21 or other connecting push-in bolts 23 connected to the base push-in bolts 21.
Further, it is provided with a length sufficient to go out from the rear end of each of the second, third, ... Normally, when the pipe material P is configured to have substantially the same length and the base push-in bolt 21 is made longer than the first pipe material P, each of the connecting push-in bolts 23 has the length of the pipe material P. Corresponding correspondence should be considered.

Base pushing bolt 21 and connecting pushing bolt 2
3, connecting nut 24 for connecting the connecting push bolts 23 to each other
Has a sufficient screw-in length sufficient to firmly connect the front and rear end portions between the push-in bolts 21 and 23 arranged in the front and rear. Further, the front and rear portions of the connecting nut 24 and the front and rear end portions of the pressing bolts 21 and 23 have mutually reverse screw structures as shown in FIGS. 3 and 4, and the pressing bolts 21 and 23 are rotated by rotating the connecting nut 24. By making it possible to fasten each other or to loosen them to separate them, conversely, work efficiency can be improved.

These push-in bolts 21 and 23 do not need to be threaded over their entire length, and at least both ends may be formed with a threaded portion, that is, a male thread at one end and a female thread at the other end. It can be formed by threading a rebar material having a possible predetermined diameter.

The push-in board 25 is additionally connected in sequence and fitted to the push-in bolts 21 and 23 which go out from the rear end opening of the pipe line material P arranged at the end of the pipe line material P to be buried. It is fastened by covering the end opening. For example, as shown in the drawing, the pushing board 25 has a peripheral edge portion of the lid base body which is slightly bulged rearward, and has a peripheral edge portion which is fitted to the outer periphery of the rear end portion of the conduit material P, and is substantially at the center of the lid base body. The push-in board 25 itself is fixed by nut-fixing the protruding rear ends of the push-in bolts 21 and 23. . The inner diameter of the peripheral portion of the lid body is not smaller than the outer diameter of the connecting portion P1 described later (see FIGS. 3 and 4).

Further, although the pushing board 25 is arranged at the rear end opening of the end pipe material P which is sequentially additionally connected so as to be buried sequentially, the advanced guide shaft H of the back reamer 1 is also provided. When the pipe material P is being inserted by the progress in the inside,
Each time a new pipe material P to be additionally connected is sequentially connected, the pipe material P is removed once correspondingly, and at the rear end of the connection pushing bolt 23 which is newly additionally connected, after the end of the pipe material P at the end. The end opening is re-covered and fastened.

As shown in the figure, the pipe material P itself has a step-like connecting portion P1 which is expanded outward at one of the opening ends by an amount corresponding to the wall thickness of the pipe material P itself. Are integrally formed, for example, and the front end portion of the pipe member P on the rear end side is fitted into the connecting portion P1 so that they can be connected to each other. Since it is sufficient if the pipe materials P are connected to each other at the work site, screwing or fitting them on the outer circumferences of the front and rear pipe materials P with the openings of the front and rear ends abutted to each other is not necessary. It is also possible to use a sleeve for fitting, or to directly screw and connect each other. Although not shown in the drawings, the connecting portion P1 may be a suitable plug-in type which is not integrated with the pipe line material P but is a separate body, preferably a joint structure having withdrawal prevention means, and its shape, The structure, means, etc. are not particularly limited.

Next, the procedure of the successive burial and connection work by this will be explained. After the excavation of the advanced tunnel H by the non-opening method between the starting shaft S and the reaching shaft R, the drill arranged on the starting shaft S side. The back reamer 1 arranged on the reaching shaft R side is towed by the towing means from the rack machine D. At this time, the base pushing bolt 21 is connected to the expander chuck body 10 connected to the rear end side of the back reamer 1 through the swivel tool 4, and the first pushing pipe 21 is inserted in the first pipe. The road material P is fastened by the pushing board 25.

That is, while the base push-in bolt 21 is connected to the connecting bolt 12 of the expander chuck body 10 via the connecting portion 22, the front end portion of the first conduit P on which the chuck sleeve 16 is fitted is connected to the chuck portion 14. Then, the connecting bolt 12 is screwed in and the chuck portion 14
The front end portion of the conduit material P is sandwiched and fixed by the chuck sleeve 16 and the chuck portion 14 by expanding. Next, the push-in plate 25 is fitted from the rear end of the base push-in bolt 21 that goes out from the end of the conduit material P, the rear end opening of the conduit material P is covered, and it is screwed. When towed by the drill rack machine D in this state, the base pushing bolt 21 and the pushing board 2
By pushing the pipe material P from the rear end side by 5, the first pipe material P is drawn into the advanced tunnel H (see FIG. 5 (A)).

Then, after, for example, half pulling into the advanced tunnel H, the push-in plate 25 is once removed, and the connecting push-in bolt 23 is fastened to the base push-in bolt 21 via the connecting nut 24, while the first conduit is Connecting part P at the rear end of the material P
The front end of the second conduit material P is fitted in 1 and the pushing board 25 is fitted again from the rear end of the connecting push bolt 23 that goes out from the end portion of the second conduit material P to form the rear end opening portion. And then screw it in (see FIG. 5 (B)). When the drill rack machine D pulls again in this state, the connecting push bolt 23 and the pushing board 25 further push the conduit material P from the rear end side, so that the second conduit material P is also advanced. Pull into H.

Then, in the same manner, the push-in board 25 is removed / screwed, the connection push-in bolt 23 is additionally fastened through the connection nut 24, the connection portion P1 of the pipe material P is additionally connected, and the drill rack machine D is used. By repeatedly pulling by, the pipe is inserted into the advanced tunnel H as a buried pipe of a predetermined length (see FIG. 6).

When the conduit material P, which is inserted through the advanced tunnel H and is piped, reaches the starting shaft S, the expander chuck body 10 connected to the front end of the first conduit material P is connected to the connecting bolts. While loosening 12 removes from the first conduit material P, the pushing board 25 fixing the rear end of the final conduit material P is removed. After that, by pulling out the expander chuck body 10, the base pushing bolt 2 which is continuously fastened to the expander chuck body 10
1, the connecting push bolt 23 and the like are sequentially drawn out, and the connecting nut 24 is loosened to disassemble the base push bolt 21 and the connecting push bolt 23 from each other. After that, a predetermined cable or the like may be laid in the buried pipe material P and then installed.

The bend in the piping path has a large length, for example, a pipe material P having a length of 8000 to 12000 mm.
This is possible as long as it is within the bending ratio allowed in the base push-in bolt 21 and the connecting push-in bolt 23 having a length substantially corresponding to the above. In some cases, the connecting nut 24 may be made flexible so that it can be dealt with.

In the above-mentioned embodiments, the pipe material P is made of a high-density polyethylene resin pipe. However, even if it is a corrugated pipe, a rib pipe, etc., it can be carried out similarly.
The material, shape, structure, etc. of the conduit material P are not limited.

[0032]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the work site is so narrow that it is not possible to secure a storage place for the long-formed pipeline material P or the like to be buried. At the time of long-distance push-embedding in the ground, it is possible to prevent tensile stress from acting on the connecting portions of the pipeline materials P as a result of pushing the pipeline material P from the rear side with pulling, and as a result, as in the conventional case. There is no need to adopt a rigid connection structure, and it is possible to simplify the structure in terms of work and structure. Further, since the pipe line materials P can be sequentially added while being pushed in, and the pipe line materials P can be pushed in from the terminal side of the pipe line material P to be connected and buried in this way, the pipe line materials P being connected There is no room for mutual separation and dismantling, the burial work can be continuously performed without interruption, and the burial work of the conduit material P by the non-open cutting method can be made more convenient.

That is, in the present invention, the pipe line material P is sequentially connected to the expander chuck body 10 connected to the back reamer 1 which is advanced by being pulled in the advanced tunnel H excavated by the non-excavation method. When the connected pipe material P is drawn into the advanced tunnel H, the push bolts 21 and 23 which are connected to the expander chuck body 10 and are additionally tightened sequentially in the pipe material P for each pipe material P. The rear end of the pipe material P to be additionally connected is fixed at the rear end opening,
This is because it is decided to push the conduit material P into the advanced tunnel H from the rear side by the pushing bolts 21 and 23 pulled by the expander chuck body 10, and thereby the conduit structure which does not have the connection structure capable of withstanding the tensile stress. Material P
Simplification of mutual connection structure, additional fastening of push bolts 21 and 23 in sequence with pushing, connection of pipe line materials P by removal of push plate 25, screw fixing, etc., fitting of pipe line materials P to each other It is possible to achieve easy connection, etc., and by improving efficiency, it is possible to greatly save time and labor on site work.

Further, the first conduit material P and the base push-in bolt 21 are connected to the expander chuck body 10 which is linked to and pulled by the back reamer 1, and fixed by the pushing board 25 at the rear end opening of the conduit material P. First connecting and fixing step, pushing step of pushing by pushing board 25 by pulling back reamer 1, pushing board 25 is removed after pushing, additional connection of pipe line material P, additional fastening of connecting pushing bolt 23, pushing board 25 again. By the second
The same steps as the connecting and fixing process, the pushing process by retraction of the back reamer 1, and the second connecting and fixing process are performed, and then the pushing is performed again, the additional connection of the pipeline material P, the additional fastening of the connecting push bolt 23, and the pushing board 25 again. By sequentially performing additional connection / pushing processes, in which fixing and pushing are repeated, the large amount of equipment and time required for welding as in the past is not required,
By simply screwing and repeating the releasing operation and the like, it is possible to realize the long-term burying of the conduit material P quickly, easily, and at low cost.

Since the push-in bolts 21 and 23, which are continuously fastened by the connecting nut 24 in the pushing means 20, correspond to the length of the pipe line material P, the end pipe line material P to be additionally connected in order. The pushing board 25 to be closed at the rear end opening can be securely screwed and fixed, and the pushing bolts 21 and 23 associated with the pulling of the back reamer 1 and the pushing board 25 to the conduit material P into the advanced tunnel H can be secured. It can be pushed in reliably and quickly.

Further, the pipe material P connected to each other has a step-like shape which is expanded to the outside at the rear end opening which is one end thereof by an amount corresponding to the wall thickness of the pipe material P itself. Since the connecting portion P1 is formed, the pipe material P on the rear end side that is sequentially buried is
By simply fitting it into the pipe material P on the front end side, the push bolts 21 and 23 can be fastened to each other and securely connected, and in addition, since the push-in bolts 21 and 23 are pressed from the rear end side,
There is no possibility that the fitting connection portion will be separated or disassembled.

Not only that, the connecting nut 24 of the pushing means 20 has the pushing bolts 21 and 23 arranged at the front and rear.
Since the front and rear ends are screwed into each other so that the front and rear ends are screwed in, the front end side conduit material P and the rear end side conduit material P
By rotating the connecting nut 24 itself in a state in which the tip end portions of the above are inserted into the connecting nut 24, they can be screwed into or separated from each other, and the field work can be efficiently performed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a device of the present invention.

FIG. 2 is a sectional view of the same main part.

FIG. 3 is a cross-sectional view in which a part of a state in which pipe materials that are similarly inserted and embedded are connected is omitted.

FIG. 4 is a sectional view in which a part of the conduit material on the terminal side is also omitted.

FIG. 5 is a schematic view including a partially enlarged view for explaining the drawing-in state of the pipe line material, in which (A) is a cross-sectional view during the work for starting the drawing, and (B) is a new pipe line material at the end side. It is sectional drawing at the time of connecting.

FIG. 6 is a schematic cross-sectional view after the completion of drawing of the conduit material.

[Explanation of symbols]

D ... drill rack machine H ... advanced shaft S ... starting shaft R ... arriving shaft P ... pipe material P1 ... connection part 1 ... back reamer 2 ... traction connection part 3 ... connection part 4 ... swivel tool 10 ... expander chuck body 11 ... chuck body 12 ... connecting bolt 13 ... connecting hole 14 ... chuck portion 15 ... biting engagement surface 15A ... locking surface 15A 15B ... push-insertion surface 16 ... chuck sleeve 17 ... bolt connecting portion 18 ... swivel means 20 ... push-in means 21 … Base push bolt 22… Connection part 23… Connection push bolt 24… Connection nut 25… Push board

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masanori Seki             Stock Exchange, 3-27-32, Toyo, Koto-ku, Tokyo             Company Doi Factory (72) Inventor Kenomi Miura             Stock Exchange, 3-27-32, Toyo, Koto-ku, Tokyo             Company Doi Factory F term (reference) 2D054 AC18 AD37 BA18

Claims (9)

[Claims] 1. A conduit material is sequentially connected to an expander chuck body linked to a back reamer that is advanced by being pulled in an advanced conduit that is excavated by a non-open cutting method, and the connected conduit material is advanced conduit. A method of pushing and embedding a pipe material for underground opening to be inserted into a mine, which is connected to an expander chuck body, and a rear end of a pushing bolt that is sequentially additionally fastened in the pipe material for each pipe material, It is fixed at the rear end opening of the pipe material to be connected, and the pipe material is pushed into the advanced tunnel from the rear side by the push bolt pulled by the expander chuck body. Push-in embedding method. 2. A first conduit material is connected to an expander chuck body connected to a back reamer that is advanced by being pulled in an advanced tunnel that is excavated by a non-open cutting method, and is also connected to an expander chuck body. A first connecting and fixing step of causing the rear end of the base push-in bolt inserted through the first conduit material to come out from the rear end opening of the first conduit material, and fixing at the rear end opening; The pushing process of pushing the first conduit material into the advanced tunnel through the base pushing bolt by the reamer towing and releasing the fixation to the first conduit material by the rear end of the base pushing bolt after pushing, The second conduit member is connected to the rear end of the second conduit member, and the rear end of the connecting thrust bolt connected to the base pressing bolt is inserted into the second conduit member. The second connection that is moved out from the rear end opening and fixed again at this rear end opening The fixing step, the pushing step of pushing the second pipeline material into the advanced tunnel through the connecting push bolt by the pulling of the back reamer, and the fixing to the second pipeline material by the rear end of the connecting push bolt after pushing. After releasing, the pipe line materials are sequentially connected in the same manner as in the second connecting and fixing step, and the connecting push bolts are additionally fastened to the rear end of the connection press bolts that have been inserted through the pipe line material to come out from the pipe line material. And re-fixing and back-reaming and pushing the pipe material additionally connected through the connecting push-bolt into the advanced tunnel. Method for embedding conduit material by indentation. 3. A back reamer that advances by being pulled in an advanced tunnel that is excavated by a non-cutting method, an expander chuck body that is connected to this back reamer and that connects a pipeline material that is to be embedded by pushing, and an expander chuck. It is additionally fastened to the body in accordance with each pipe material in order, and the push bolt that goes out from the rear end opening of each end pipe material that is sequentially buried is fixed at the rear end opening of each end pipe material. And a pushing means for pushing the pipeline material from the rear side as the back reamer is pulled. 4. The expander chuck body has a chuck body formed into a substantially conical shape having a small diameter on the leading side, and is inserted into the chuck body from the leading side of the chuck body so as to be rotatable. , A chuck part provided on the rear end side of the chuck body so as to expand by the entry of the connecting bolt, and a pipe line fitted to the outer periphery of the chuck part. 4. The apparatus according to claim 3, further comprising a chuck sleeve fitted on the outer periphery of the material corresponding to the position of the chuck portion, and a bolt connecting portion connecting the pressing means. 5. The pushing means includes a base pushing bolt connected to a bolt connecting portion of the expander chuck body, and a plurality of connecting pushing bolts sequentially additionally connected to a rear end of the base pushing bolt via a connecting nut. A pusher plate detachably attached to the rear end opening of each of the end pipes that are sequentially buried, and the pusher plate fastened to the end of the push-in bolt that goes out from the rear end opening. 3. A device for pushing and burying a conduit material for underground burial according to any one of 3 and 4. 6. The pipe line material is formed with a step-like connecting portion that is expanded to the outside at an extent corresponding to the pipe wall thickness of the pipe line material itself at either one of the open ends. Item 6. An indentation burying device for a conduit material for underground burying according to any one of items 3 to 5. 7. The connecting nut has a mutually reverse screw structure at the front and rear portions so that the front and rear ends of a push-in bolt arranged forward and backward along the push-in direction can be screwed in. Burial equipment for in-ground burial pipe material. 8. The indentation burying device for underground pipe line material according to claim 3, wherein the indentation bolt is formed to have a length substantially corresponding to the length of the pipe line material. 9. The pushing board covers the rear end opening of the end pipe material, and is screwed to the rear end opening at the rear end portion of the pushing bolt protruding from the rear end opening of the end pipe material. The apparatus for pushing and burying a conduit material for underground burial according to any one of claims 5 to 8, which is provided.