JPH0868285A - Underground wire line construction method - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a method for constructing an underground wire line, and even if the intervals of the vertical holes drilled in the ground are wide, horizontal holes connecting the vertical holes can be easily drilled. An object of the present invention is to provide a wire line forming method capable of passing a wire in a U shape. [Structure] A zip that becomes a rod-shaped chain by drilling injection holes and guide holes at a certain distance in the ground, and meshing the two chains with the rotation of the chain gear and the guide of the zipper roller inside the injection holes. An injection device consisting of a chain and an injection nozzle attached to the tip of a rod-shaped chain, with one end of the wire detachably attached to the tip of the rod-shaped chain is inserted, and the chain is engaged by rotation of the chain gear to guide the rod-shaped chain into a guide hole. It is characterized in that the wire is extended toward, and the water for drilling is jetted from the jet nozzle to drill a lateral hole connected to the guide hole, and then one end of the wire is pulled up from the guide hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming an underground wire line which can be used for forming an underground water-blocking film or for modifying a pipeline of a submerged buried pipe.

[0002]

2. Description of the Related Art As disclosed in Japanese Examined Patent Publication No. 49-49401 or Japanese Examined Patent Publication No. 3-80222, etc.,
Create a U-shaped wire line from the ground through the ground to the ground, and pull up both ends of the wire to form a trench in the ground to create a water-impervious film, and to correct the submerged pipe conduit. Are known to do.

25 to 29 are shown in Japanese Patent Publication No. 49-4940.
Fig. 1 shows a conventional example disclosed in Japanese Patent Publication No. 1, which is related to a method of excavating a trench for forming an underground water-blocking film. First, as shown in Figs. After drilling the holes 1 and 3 in the ground 5, an injection pipe 9 having an injection nozzle 7 attached to the tip thereof is inserted into the vertical hole 1. And standing hole 1
A fluid 11 is jetted at a high pressure from the bottom of the ground to drill the ground 5, and a lateral hole 13 that connects the bottoms of the compatible holes 1 and 3 is formed.

Next, as shown in FIG. 27, a sponge ball 1
A rope 17 to which targets such as 5 are attached is lowered into the vertical hole 1, and a jet stream of the fluid 11 (high-pressure water jet) is applied to the sponge ball 15 to penetrate through the lateral hole 13 and the other vertical hole 3 The rope 17 is guided to the ground, and the rope 17 is pulled up from the standing hole 3 by the pulling member 19 as shown in FIG.

Then, as shown in FIG. 29, a chain-like excavation tool 21 is introduced into the ground 5 by using a rope 19 and is circulated to the ground surface 5 by pulling the chain-shaped drilling tool 21 toward the ground surface 23 to rotate and circulate the ground 7. After forming a narrow trench, a water impermeable material such as asphalt is injected into the trench to form an impermeable water impermeable film in the ground 5.

Further, FIGS. 30 to 32 show Japanese Patent Publication No. 3-802.
The method for correcting the pipeline of the submerged buried pipe disclosed in Japanese Patent No. 22 is shown. In this conventional example, first, the buried pipe 2 at the location where the pipeline is modified.
On both sides of 5, a pair of standing holes 2 sandwiching the buried pipe 25 are provided.
7, 29 are drilled in the ground 31 at regular intervals.

Then, as in the conventional example described above, the injection pipe 33 having the injection nozzle attached to the tip is inserted into the vertical hole 27 to inject the fluid 35 at a high pressure, and the ground 31 below the buried pipe 25 is drilled. A lateral hole 37 that connects the compatibility holes 27 and 29 is formed.

Next, the pilot ball 39 mounted on the tip of the injection pipe 33 is pushed out into the other standing hole 29 by the jet flow of the fluid 35, whereby the pilot ball 3 concerned.
Connect the wire 41 connected to 9 to the vertical holes 27 and 29 and the horizontal hole 3
Hand over to 7.

Then, as shown in FIG. 31, a wire 41 is wound around the latch 43 inserted into the vertical hole 29 and pulled up to form wire lines in the vertical holes 27 and 29 and the horizontal hole 37. Then, a large-diameter wire 45 for pulling up as shown in FIG. 32 is tied to one end of the wire 41 and is inserted into the vertical holes 27, 29 and the lateral hole 37 for replacement, and then the wire is attached to the jack 49 installed on the ground surface 47. If the wire 45 is pulled up and pulled up, the wire 45 cuts the ground 31 and hangs on the outer periphery of the buried pipe 25. Therefore, the wire 45 is further pulled up and the buried pipe 25 is corrected to a regular pipe line indicated by a two-dot chain line. To do.

[0010]

As described above, conventionally, the rope 19 or the wire 41 is inserted from one of the vertical holes 1 and 27 through the horizontal holes 13 and 37 into the other vertical holes 3 and 29, and then the underground. In order to create the wire line, the jet flow of the fluids 11 and 35 (high-pressure water jet) is used.
The range of 1,35 jets is at most 1 m,
There was a drawback that ropes or wires could not be passed between the wide vertical holes.

From the other vertical hole 3, 29, the fluid 11,
If the circulation flow paths of the fluids 11 and 35 are not formed by sucking 35 or the like, the sponge balls 15 and the pilot balls 39 perform irregular reciprocating motions in the lateral holes 13 and 37 due to the jet flow, and the pulling member 19 Rope 19 and wire 4 with hook 43
There was also a problem that it was difficult to hook 1.

The present invention has been devised in view of the above circumstances, and when the underground water-blocking film is formed or the pipeline of the submerged buried pipe is repaired, even if the intervals of the vertical holes drilled in the ground are wide, The horizontal holes that connect the holes are easily drilled and the wires are placed in the ground.
It is an object to provide a method for constructing an underground wire line that can be passed in a letter shape.

[0013]

In order to achieve such an object, the method of constructing an underground wire line according to claim 1 is
A vertical hole that is an injection hole and a vertical hole that is a guide hole are drilled at regular intervals in the ground, and flexibility is provided in the injection hole by rotating the chain gear mounted on the assembler and guiding the pair of zipper rollers. It consists of a chain that can be separated from each other by meshing the two chains that it has into one rigid rod-shaped chain, and an injection nozzle that is attached to the tip of the rod-shaped chain and is connected to a water supply hose. One end of the wire is rod-shaped. Insert a drilling water injection device that can be detachably attached to the tip of the chain, engage two flexible chains by the rotation of the chain gear, and extend the rod-shaped chain toward the guide hole. One end of the wire attached to the tip of the rod-shaped chain from the guide hole after the horizontal hole connecting the injection hole and the guide hole is drilled in the ground by spraying drilling water Characterized in that the raise.

[0014]

According to the invention as set forth in claim 1, after the vertical hole which is the injection hole and the vertical hole which is the guide hole are drilled at a constant interval in the ground, the drilling water injection device is inserted into the injection hole. , The two chains having flexibility are engaged by the rotation of the chain gear to extend the rod-shaped chain toward the guide hole, and when the water for drilling is jetted from the jet nozzle in the traveling direction of the rod-shaped chain, the horizontal hole Is drilled in the ground.

When the horizontal hole thus drilled is connected to the guide hole, the rotation of the chain gear and the injection of the drilling water are stopped, and one end of the wire attached to the tip of the rod-shaped chain from the guide hole is stopped. If pulled up, a U-shaped wire line will be formed in the ground.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 21 show an embodiment of a method of forming an underground water-impervious film using the method of forming an underground wire line according to claim 1, and 51 in FIG. In the hole water injection device (hereinafter referred to as "injection device"), the injection device 51 is a single rigid rod-shaped chain in which two flexible chains are engaged mainly by the rotation of the chain gear and the zipper roller guide. A chain (hereinafter, referred to as “zip chain”) 53 that can be meshed and separated, and an injection nozzle 55 attached to the tip of the chain.

That is, as is well known, the zip chain 53
As shown in FIGS. 1 and 2, two flexible chains are guided by the zipper rollers 61 and 63 paired with the rotation of the chain gear 59 mounted on the assembler 57 in the direction of arrow A. 65, 67 meshes with each other to form one rigid rod-shaped chain 69. When the two chains 65, 67 are meshed with each other by the rotation of the chain gear 59, the rod-shaped chain 69 becomes the chain 65, When extending in a direction perpendicular to 67 (direction of arrow B in the figure) and changing rotation of the chain gear 59 (rotating in direction of arrow C),
The rod-shaped chain 69 is retracted in the direction of arrow D and separated to return to the state of the two chains 65 and 67 having flexibility. In addition, the chain gear 59 is the assembler 5
A hydraulic motor (not shown) in 7 rotates in the directions of arrows A and C.

An injection nozzle 55 for injecting the drilling water W at a high pressure in the traveling direction of the rod-shaped chain 69 is attached to the tip of the rod-shaped chain 69. It is supplied from the ground via a hose 71. The water supply hose 71 is a guide member 73 mounted on the assembler 57.
The water supply hose 71 does not hinder the movement of the rod-shaped chain 69 in the directions of the arrows B and D, though the rod-shaped chain 69 and the chain storage pipe 75 to be described later are inserted. ing.

At the tip of the rod-shaped chain 69, a metal ring 79 to which one end of a fiber rope 77 is connected.
Is detachably attached, and the other end of the rope 77 extends through the guide member 73 to the ground.
Although the fiber rope 77 is used in the present embodiment, a thin wire rope having flexibility may be used instead of the rope 77.

Further, in FIG. 1, reference numerals 75 and 81 denote chain storage pipes arranged coaxially with the assembler 57 interposed therebetween. One chain 65 is stored in the chain storage pipe 75 extending upward from the assembler 57. The other chain 67 is suspended and stored in the chain storage pipe 81 extending downward from the assembler 57, and the assembler inserted into the chain storage pipe 75 is inserted at the upper end of the chain 65. The rod 83 is fixed.

The injecting device 51 used in this embodiment is constructed in this way, and the injecting device 51 can be moved up and down in the standing hole provided in the ground by the assembler insertion rod 83.

The method of forming an underground water-blocking film according to this embodiment using the above-mentioned injection device 51 is carried out as follows. First, as shown in FIGS. 3 and 4, a plurality of vertical holes 87, 89, 91 are drilled in the ground 85 at regular intervals. It should be noted that the vertical holes 87, 89, 91 may be drilled by any means, and for example, it is convenient to drill the holes by jet injection using an injection device by the jet grout method.

Then, one of the pair of adjoining standing holes 87 and 89 is used as an injection hole and the other is used as a guide hole, and the standing hole 8 serving as an injection hole is formed.
As shown in FIGS. 5 and 6, the injector 51 is inserted into the inside of the assembly 7, and then the hydraulic motor in the assembly 57 is driven by the operation from the ground to rotate the chain gear 59 in the arrow A direction. , The above-mentioned two chains 65 and 67 are engaged with each other to extend the rod-shaped chain 69 in the direction of the other standing hole 89 serving as a guide hole as shown in FIGS. 7 to 9, and at the same time, the rod-shaped chain 69 advances from the injection nozzle 55. The hole-forming water W is sprayed in the direction to form the horizontal hole 93 that connects the vertical holes 87 and 89 in the ground 85.

Thus, as the rod-shaped chain 69 extends and the lateral hole 93 is drilled, the rope 77 attached to the tip of the rod-shaped chain 69 via the ring 79 is sequentially fed out. .

Then, as shown in FIGS. 10 and 11,
When the horizontal hole 93 drilled from the vertical hole 87 penetrates the vertical hole 89 and the tip of the rod-shaped chain 69 is exposed in the vertical hole 89,
The injection of the drilling water W and the driving of the hydraulic motor are stopped.

Next, as shown in FIGS. 12 and 13, a rope recovery rod 97 having a magnet 95 attached to the tip thereof is inserted into the vertical hole 89, and a metal ring 79 attached to the tip of the rod-shaped chain 69 is attached to the magnet 95. Then, the rope 77 is inserted into the vertical holes 87, 89 and the horizontal hole 93 in a U shape as shown in FIG. 14, and a wire line is formed in the ground 85.

Similarly, the vertical holes 89 are used as the injection holes and the vertical holes 9.
The injection device 95 is inserted into the vertical hole 89 by using 1 as a guide hole, and the above-described steps are repeated to form the horizontal hole 93 ′ between the vertical holes 89 and 91. Then, after forming the wire line of the rope 77 'into a U-shape through the vertical holes 89, 91 and the horizontal holes 93', one end of the ropes 77, 77 'are connected to each other as shown in FIG. If you pull both ends of 77 ',
As shown in FIG. 16, the ropes 77, 77 'have vertical holes 87, 9
1 and the lateral holes 93, 93 'are inserted to form a U-shaped wire line in the ground 85.

Then, one chain 99 is connected to the end of the rope 77 or rope 77 ', and these are circulated to replace the ropes 77 and 77' with the chain 99 as shown in FIG. , 89, 91 are filled with a water blocking material S such as asphalt or cement milk by an injection pipe 101. Then, as shown in FIG. 18, when the chain 99 is pulled toward the ground surface 103 to cut the ground 85,
Since the narrow trench 105 is formed in the ground 85 as shown in FIGS. 19 and 20, the water-impervious material S is placed in the trench 105.
As a result, the thin water-blocking film 107 is formed in the ground 85.

The impermeable film S may be replenished from the injection pipe 101 to form the impermeable film 107 in the ground 85. or,
As shown in FIG. 18, when the chain 99 is pulled toward the ground surface 103 to cut the ground 85, if the chain 99 is alternately moved in the arrow E and F directions as shown in FIG. 21, the pulling force is small and the pulling speed is high. However, if the water blocking film 107 is formed by such a method, there is a disadvantage that the sand 109 or the like in the ground 85 is interposed between the water blocking films 107.

Therefore, it is preferable that after the ground 85 is cut by the chain 99, the wire 111 is passed again to destroy the once formed water-impervious film 107 to newly form the water-impervious film 113.

As described above, according to the method of constructing the underground wire line according to this embodiment, even if the spacing between the vertical holes 87, 89, 91 is wide, by using the zip chain 53, the vertical holes 87, 89, 91, Lateral holes 93, 9 connecting 91
3'can be easily drilled and ropes 77, 77 'can be placed in the ground 85.
Since it is possible to create a wire line of the above, if the underground water-impervious film is created by using such a method, it is possible to increase the distance between the vertical holes 87, 89, and 91 and to provide a long water impermeant. The formation of the film 107 can be easily performed.

Further, according to the method of constructing an underground wire line according to this embodiment, a sponge ball or a pilot ball is passed through a lateral hole by a jet flow (high-pressure water jet) as in the conventional example shown in FIG. Since the rope is not guided to the other vertical hole, it is possible to easily form the wire line in the ground as compared with the conventional example, and there is an advantage that the water impermeable film can be efficiently formed.

22 to 25 show an embodiment of a method for repairing a conduit of a submerged buried pipe using the method for constructing an underground wire line according to claim 1, and this embodiment has been described with reference to FIGS. 30 to 32. Similar to the conventional example, vertical holes and lateral holes are drilled around the submerged buried pipe, and the buried pipe is pulled up by a wire inserted through these holes.

The present embodiment will be described below with reference to the drawings. The same components as those in the above embodiment are designated by the same reference numerals and the description thereof will be omitted. As shown in FIG. 22 and FIG. 23, first, on both sides of the buried pipe 115 at the location where the pipeline is corrected, vertical holes 117 and 119 that form a pair with the buried pipe 115 sandwiched are vertically drilled at regular intervals. The lower ends of the upright holes 117 and 119 are located slightly below the lower ends of the buried pipes 115.
As shown in FIG. 2, the lower ends of the upright holes 117 and 119 differ depending on the degree of sinking of the buried pipe 115. The drilling means for the vertical holes 117 and 119 is arbitrary.

Although not shown, as in the above embodiment, one of the pair of vertical holes 117 and 119 is used as an injection hole, and the other is used as a guide hole.
After inserting 1, the hydraulic motor in the assembler 57 is driven to rotate the chain gear 59, the two chains 65 and 67 are engaged with each other, and the rod-shaped chain 69 is directed toward the other standing hole 119 serving as a guide hole. At the same time, the water W for drilling is extended from the jet nozzle 55 in the traveling direction of the rod-shaped chain 69.
Lateral hole 12 that connects the vertical holes 117 and 119 by injecting
1 is drilled in the ground 123.

Thus, as the rod-shaped chain 69 extends and the lateral hole 121 is drilled, the wire rope 12 attached to the tip of the rod-shaped chain 69 via the ring 79.
5 will be sequentially delivered.

In this embodiment, a flexible wire rope 124 is used instead of the fiber rope 77 in the above embodiment. Then, the horizontal hole 121 drilled from the vertical hole 117 penetrates the vertical hole 119 to penetrate the rod-shaped chain 69.
When the tip of the rod is exposed in the vertical hole 89, the injection of the water W for drilling and the driving of the hydraulic motor are stopped, and the rope recovery rod 97 with the magnet 95 attached to the front end is inserted into the vertical hole 119 to form the rod-shaped chain 69. When the metal ring 79 attached to the tip of the magnet 95 is attracted to the magnet 95 and pulled up, the wire rope 125 is inserted into the vertical holes 117 and 119 and the horizontal hole 121 in a U shape as shown in FIG. A wire line is formed in the ground 123.

Then, as shown in FIGS. 22 and 24, the wire rope 1 is attached to the jack 129 installed on the surface 127.
If you multiply it by 25 and pull it up, wire rope 12
Since 5 cuts the ground 123 and hangs on the outer periphery of the buried pipe 115, if the wire rope 125 is further pulled up, the buried pipe 115 is pulled up from the position shown by the chain double-dashed line to the position shown by the solid line as shown in FIG. It will be restored to a regular conduit.

Incidentally, when pulling up the wire rope 125, the pulling amount differs depending on the vertical holes 117 and 119 drilled at regular intervals as shown in FIG.
It is necessary to adjust the pulling speed so that only a part of the buried pipe 115 is suddenly pulled up so as not to break the buried pipe 115.

If, for example, the wire rope 125 is stretched and left as it is with respect to the buried pipe 115 pulled up in this way, there is no possibility that the conduit will be distorted again. In addition to or instead of the tensioning, as shown in FIG.
Ground 1 of buried pipe 115 by injecting mortar M etc. from 19
By reinforcing 23, it is possible to prevent the conduit from being distorted again.

Furthermore, the buried pipe 1 is connected with the wire rope 125.
When pulling up 15, the buried pipe 115
If there is a risk of damage to the upright holes 117,
An injection rod equipped with an injection nozzle that horizontally ejects a fluid is inserted into the tip of the injection nozzle 119, and a chemical solution that hardens in an agar form is injected and injected from the injection nozzle into the pipe path correction area above the embedded pipe 115. It is necessary to weaken the upper part. Therefore, in such a case, the upright holes 117,
119 is preferably provided by a jet grout method.

As described above, according to the method of constructing the underground wire line according to the present embodiment, the zip chains 53 are used to connect the vertical holes 117 and 119 even if the vertical holes 117 and 119 are widely spaced. Since it is possible to easily drill the horizontal hole 121 to form the wire line of the wire rope 125 in the ground 123, in the case of repairing the pipeline of the subsidence buried pipe by using such a forming method, the buried pipe Even if the diameter is large, the pipe can be corrected easily and surely.

Further, as described above, in the method of constructing the underground wire line according to this embodiment, the sponge ball or the pilot ball is made to penetrate the lateral hole by the jet flow as in the conventional example shown in FIG. Since the wire rope is not guided to the wire rope, it is possible to easily construct a wire line in the ground as compared with the conventional example, and there is an advantage that the pipeline of the submerged buried pipe can be efficiently corrected.

[0044]

As described above, according to the method of constructing an underground wire line according to the present invention described in claim 1,
Even if vertical holes are drilled at wide intervals in the ground, by using the zip chain, it is possible to easily drill horizontal holes that connect the vertical holes and create a wire rope wire line in the ground. Is.

Therefore, if the underground water shield film is formed by using the method for forming an underground wire line according to the present invention, it is easy to form a long water shield film with a wide space between the vertical holes. If the method of the present invention is used to correct the conduit of the submerged buried pipe, the conduit can be easily and reliably repaired even if the diameter of the buried pipe is large.

Further, according to the method of constructing an underground wire line according to the present invention, as in the conventional method, a sponge ball, a pilot ball or the like is penetrated through a lateral hole by a jet flow to guide a wire rope to the other vertical hole. Since there is no such structure, it is possible to easily form a wire line in the ground as compared with the conventional example, and there is an advantage that the work of forming the water-blocking film and the work for correcting the pipeline of the submerged buried pipe can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a side view of an injection device used in an embodiment of a method for constructing an underground wire line according to claim 1.

FIG. 2 is an explanatory diagram showing characteristics of a zip chain.

FIG. 3 is a cross-sectional view of the ground showing a state in which vertical holes have been drilled.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a cross-sectional view of the ground showing a state in which an injection device is inserted into a vertical hole.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged side view of the ground and the injection device showing a hole drilling state of the ground by the injection device.

FIG. 8 is a cross-sectional view of the ground showing a state where a hole is drilled in the ground by an injection device.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a cross-sectional view of the ground showing a state in which horizontal holes are drilled between vertical holes.

11 is a sectional view taken along line XI-XI of FIG.

FIG. 12 is a cross-sectional view of the ground showing a state where the rope is pulled up from the standing hole.

FIG. 13 is a cross-sectional view of the ground showing a state where a rope is pulled up from an upright hole.

FIG. 14 is a cross-sectional view of the ground showing a state in which a wire line is formed in the ground.

FIG. 15 is a cross-sectional view of the ground showing another wire line formed in the ground.

FIG. 16 is a cross-sectional view of the ground showing a state in which a wire line has been created in the ground.

FIG. 17 is a cross-sectional view of the ground showing a state in which a water blocking material is injected into the vertical hole.

FIG. 18 is a cross-sectional view of the ground showing a state in which a chain is pulled up to form a water blocking film in the ground.

FIG. 19 is a cross-sectional view of the ground on which a water blocking film is formed.

20 is a sectional view taken along line XX-XX of FIG.

FIG. 21 is an explanatory diagram showing a preferred method of forming a water-blocking film.

FIG. 22 is a cross-sectional view of the ground showing an embodiment of a method for correcting the pipeline of a submerged buried pipe using the method for constructing an underground wire line according to claim 1.

FIG. 23 is a cross-sectional view of the ground in which a vertical hole and a horizontal hole are drilled to surround a submerged buried pipe.

24 is a sectional view taken along line XXIV-XXIV of FIG.

FIG. 25 is a cross-sectional view of the ground showing a conventional method of drilling a horizontal hole from one vertical hole to the other vertical hole.

FIG. 26 is a sectional view taken along line XXVI-XXVI of FIG. 25.

FIG. 27 is a cross-sectional view of the ground showing a state in which a sponge ball has been lowered to the position of an injection nozzle.

FIG. 28 is a cross-sectional view of the ground showing a state where a sponge ball is pulled up from the other vertical hole.

FIG. 29 is a cross-sectional view of the ground showing a state in which a trench is formed by a chain-shaped excavator.

FIG. 30 is a cross-sectional view of the ground showing a state in which a pilot ball is being pushed out to the other vertical hole by a jet flow.

FIG. 31 is a cross-sectional view of the ground showing a state in which a wire is pulled up from the other vertical hole.

FIG. 32 is a cross-sectional view of the ground showing a state in which the conduit of the submerged buried pipe is corrected by a wire.

[Explanation of symbols]

 51 injection device 53 zip chain 55 injection nozzle 57 assembler 59 chain gear 61,63 zipper roller 65,67 chain 69 rod-shaped chain 71 water supply hose 75,81 chain storage pipe 77,77 'rope 83 assembler insertion rod 85,123 ground 87, 89, 91, 117, 119 Vertical hole 93, 93 ', 121 Horizontal hole 99 Chain 101 Injection pipe 105 Groove 107,113 Water blocking film 111 Wire 115 Buried pipe 125 Wire rope 129 Jack M Mortar S Water blocking material W Drilling water

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area E02F 5/10 F16L 1/038 1/024 E21B 7/18

Claims (1)

[Claims] 1. A vertical hole, which is an injection hole, and a vertical hole, which is a guide hole, are drilled at regular intervals in the ground, and rotation of a chain gear mounted on an assembler and guide of a pair of zipper rollers are introduced into the injection hole. The two flexible chains mesh with each other to form one hard rod-shaped chain that can be meshed and separated, and an injection nozzle attached to the tip of the rod-shaped chain and connected to a water supply hose.
Insert a water injection device for hole drilling in which one end of the wire is detachably attached to the tip of the rod-shaped chain, and rotate the chain gears to engage two flexible chains to extend the rod-shaped chain toward the guide hole. After spraying water for drilling from the spray nozzle in the traveling direction of the rod-shaped chain to drill a horizontal hole connecting the jet hole and the guide hole in the ground, one end of the wire attached to the tip of the rod-shaped chain from the guide hole. A method for constructing an underground wire line, which is characterized by pulling up