KR101241082B1 - Propulsion mithod of pipe for underground laying - Google Patents

Propulsion mithod of pipe for underground laying Download PDF

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Publication number
KR101241082B1
KR101241082B1 KR1020120100759A KR20120100759A KR101241082B1 KR 101241082 B1 KR101241082 B1 KR 101241082B1 KR 1020120100759 A KR1020120100759 A KR 1020120100759A KR 20120100759 A KR20120100759 A KR 20120100759A KR 101241082 B1 KR101241082 B1 KR 101241082B1
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KR
South Korea
Prior art keywords
excavator
base
propeller
propulsion
winch
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KR1020120100759A
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Korean (ko)
Inventor
황성태
Original Assignee
석정건설(주)
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Priority to KR1020120100759A priority Critical patent/KR101241082B1/en
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Publication of KR101241082B1 publication Critical patent/KR101241082B1/en

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/04Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/08Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield

Abstract

The present invention relates to a method for propagating underground pipes, the first step of establishing a propulsion base and an arrival base; A second step of drilling a guide hole penetrating the propelling base and the reaching base through the horizontal boring machine and the casing; A third step of installing a guide wire wound around the reach base, and releasing the guide wire from the winch and inserting the guide wire into the guide hole; A fourth step of forming a concrete floor and a concrete support wall on the bottom of the propulsion base; A fifth step of installing a propeller in front of the concrete support wall, installing an excavator in front of the propeller, and installing a filler; A sixth step of coupling the tip of the guide wire to idle with the tip of the auger shaft of the excavator; A seventh step of applying power to the rotating bit of the excavator, driving the propeller to propel, and operating the winch to pull the excavator to guide the progress of the excavator; An eighth step when the propulsion of the excavator is completed, stopping operation of the excavator, the winch and the propeller, and supplying and installing a tube between the excavator and the propeller; An eighth step of applying the filler to the outer periphery of the tube by reactivating the stationary excavator, winch and propeller to operate the filler while pushing the tube; And a ninth step of repeatedly operating and stopping the excavator, the winch, the propeller, and the filler, and pushing the tube to which the filler is applied until reaching the reaching base.

Description

Underground buried pipe propulsion method {PROPULSION MITHOD OF PIPE FOR UNDERGROUND LAYING}

The present invention relates to a method for pushing underground pipes, and more particularly, to a method for pushing underground pipes that can reduce costs and greatly reduce air by making pipes accurate and rapid.

In general, pipeline construction such as water supply, sewerage, telecommunications, city gas, power, etc. has been used in the open-ground method to dig the ground from the ground to connect the pipeline. However, when the opening method is made in the city center, many regulations are attached to the opening because it causes traffic obstacles and various complaints, which causes difficulties in working. In addition, the laying of pipelines such as high traffic roads, busy streets, dedicated roads of vehicles, highways, railroads, dikes, and river crossings has been very difficult to work with in open construction.

In order to solve such a problem, a propulsion method has been proposed for laying and laying pipelines underground. The propulsion method is a method of constructing a propulsion base and an arrival base by digging underground at both points crossing the pipeline, and pushing a pipeline to be buried by operating a propeller and an excavator installed in the propulsion base to the arrival base. The propulsion method provides a number of advantages, for example, embedding pipelines in wide roads or on footpaths, without causing traffic jams or difficulty in walking. Related prior art is Korean Patent Publication No. 10-0515684 "Pipe penetrating method and apparatus".

However, the existing propulsion method has the disadvantage of laying the pipeline depending only on the speed of the excavator, and there is a problem in the progress of the excavator when there are obstacles such as stones (stones, amber, etc.), logs, and steel (H beams, etc.). It is true that there are many difficulties in the work, such as the occurrence of.

Korea Patent Publication No. 10-0515684 "Pipe propulsion method and its device"

The purpose of the present invention is to guide and pull the progress of the excavator in the reach of the base can be carried out accurately and quickly pipe laying, removing obstacles and proceeding with the excavator, underground buried pipe propulsion method which can increase the efficiency of work To provide.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular embodiments that are described. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, There will be.

The present invention for achieving the above object is a first step of constructing the propulsion base and the reaching base by digging into the basement at each of the two points crossing the tube; A second step of installing a horizontal boring machine at any one of the propulsion base and the reaching base, and drilling a guide hole penetrating the propelling base and the reaching base through the horizontal boring machine and the casing; A third step of installing a winch in which the guide wire is wound at the reaching base, and releasing the guide wire from the winch and inserting the guide wire into the guide hole, and inserting the guide wire into the guide hole so that the tip end of the guide wire comes out of the propulsion base. ; A fourth step of forming concrete floor by placing concrete on the bottom of the propulsion base and forming a concrete support wall on a rear wall of the propulsion base; A fifth step of installing a propeller in front of the concrete support wall to fix the concrete floor, and installing an excavator having a rotating bit, a screw auger and an auger shaft in front of the propeller, and installing a filler in the concrete support wall; A sixth step of coupling the tip of the guide wire exiting the propulsion base to idle with the tip of the auger shaft of the excavator; The power is applied to the rotating bit of the excavator and the propulsion of the excavator powered by the rotating bit is performed by driving the propeller, while the winch is pulled to wind the guide wire to pull the excavator. A seventh step of guiding the progress of the; An eighth step of stopping the operation of the excavator, the winch and the propeller when the propulsion of the excavator is completed and supplying and mounting the tubular body between the excavator and the propeller; A ninth step of applying the filler to the outer periphery of the tubular body through a nozzle installed to cover the outer periphery of the tubular body by reactivating the stationary excavator, the winch and the propeller to propel the tubular body; And a tenth step of repeatedly operating and stopping the excavator, the winch, the propeller, and the filler, and pushing the tubular body to which the filler is applied until reaching the reaching base.

Specifically, the operation of the excavator, the winch, the propeller and the filling machine can be controlled in a construction control room equipped with computer means.

An idling member having a bearing member is installed at the tip of the auger shaft of the excavator, and the tip of the guide wire can be idled from the auger shaft of the excavator by rotating by being coupled to the idling member.

When an obstacle occurs in the progress of the excavator due to an obstacle, the obstacle may be removed by opening and closing a part of the head of the excavator.

According to the present invention, the pipe laying can be made accurately and quickly by guiding and pulling the progress of the excavator at the reaching base. This can significantly reduce cost and air. In addition, since an obstacle occurs to stop the progress of the excavator or change the direction, the work efficiency can be greatly increased.

1 is a view showing a state in which to build the propulsion base and the arrival base in the present invention, respectively.
Figure 2 is a view showing a state in which the horizontal boring machine installed in the propulsion base in the present invention.
3 is a view showing a state in which the horizontal boring machine drills the guide hole in the present invention.
Figure 4 is a view showing a state in which the winch installed in the reach base in the present invention inserts the guide wire in the guide hole.
5 is a view illustrating a winch installed in the reach base in the present invention.
6 is a view showing a concrete floor and concrete support wall formed on the propulsion base in the present invention.
7 is a view showing a state in which the propeller and excavator installed in the propulsion base in the present invention.
8 is a view showing a combination of the excavator and the guide wire in the present invention.
9 is a view showing a state in which the operation by operating the winch and the propeller and the excavator in the present invention.
10 is a view showing a state of supplying the tubular body by reversing the propeller in the present invention.
FIG. 11 is a view showing a state in which the winch, the propulsion machine and the excavator are used to propel the tube and apply the filler to the outer periphery of the tube.
12 is a view showing a state of removing the obstacle by opening a part of the head of the excavator in the present invention.
Figure 13 is a view showing a state in which the propulsion of the tubular body is completed in the present invention.
14 is a cross-sectional view showing a state in which the tubular body is pushed in the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like elements in the figures are denoted by the same reference numerals wherever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a view showing a state in which the propulsion base and the arrival base in the present invention, respectively.

As shown in Figure 1, the underground buried pipe propulsion method of the present invention starts from the step of establishing a propulsion base (A) and reach base (B). The base 1 is excavated underground at both points traversed by the pipe 1 (see FIG. 10) to build a propulsion base A and an arrival base B. FIG. For example, a propulsion base (A) is formed by digging underground on both sides of the road where the tubular body 1 crosses through roads (central roads, sidewalks, motorways, highways, etc.), railroad tracks, dikes, rivers, and bridges. And reach base (B). Provisional bases (A) and reachable bases (B) are installed in the construction of temporary temporary mud (not shown) with H-beams, sheet piles, etc. to prepare for the collapse of the surrounding soil due to the excavation.

Figure 2 is a view showing a state in which the horizontal boring machine installed in the propulsion base in the present invention. 3 is a view showing a state in which the horizontal boring machine drills the guide hole in the present invention.

2 and 3, when the construction of the propulsion base (A) and the arrival base (B) is completed, the horizontal boring machine (10) in any one of the propulsion base (A) and the reaching base (B). After installation, the guide hole 13 penetrates the propelling base A and the reaching base B through the horizontal boring machine 10 and the casing (not shown). Since the configuration, installation structure and operation principle of the horizontal boring machine 10 is already widely used technology, detailed description thereof will be omitted.

Figure 4 is a view showing a state in which the winch installed in the reach base in the present invention inserts the guide wire in the guide hole. 5 is a view illustrating a winch installed in the reach base in the present invention.

As shown in FIG. 4, when the drilling of the guide hole 13 penetrating the propelling base A and the reaching base B is completed, the horizontal boring machine 10 is removed. Thereafter, the winch 20 is wound around the guide wire 23 to the arrival base B. The concrete is placed on the bottom of the reaching base B to form a concrete floor (not shown), and a bolt or the like is bolted to the concrete floor from a support (not shown) supporting the winch 20 to firmly secure the winch 20. It is preferable to fix it. The configuration, installation structure and operation principle of the winch 20 is already a universally used technology, so a detailed description thereof will be omitted.

When the winch 20 is firmly fixed, the guide wire 23 is released from the winch 20 and inserted into the guide hole 13. The guide wire 23 is inserted into the guide hole 13 so that the tip thereof comes out of the propulsion base (A).

6 is a view showing a concrete floor and concrete support wall formed on the propulsion base in the present invention.

As shown in FIG. 6, when the insertion of the guide wire 23 into the guide hole 13 is completed, the concrete is poured on the bottom of the propulsion base A to form a concrete floor 31, and the propulsion base A The concrete support wall 33 is formed on the rear wall of the side wall).

7 is a view showing a state in which the propeller and excavator installed in the propulsion base in the present invention.

As shown in FIG. 7, when the concrete floor 31 and the concrete support wall 33 are formed in the propulsion base A, the propeller 40 is installed in front of the concrete support wall 33 to install the concrete floor 31. ) And firmly fixed to the front of the propeller (40) is equipped with an excavator (50). In addition, the concrete support wall 33 is provided with a filler (60).

Outside the propulsion base A, a construction control room 70 having computer means (not shown) such as a laptop or a PC is installed, and the computer means of the construction control room 70 includes a propeller 40 and an excavator 50 and Electrically connected. The computer means of the construction control room 70 is also electrically connected to the winch 20. The computer means of the construction control room 70 may be electrically connected to the drive motor of the winch 20 to remotely control the winch 20 by remotely controlling the driving of the drive motor.

The concrete support wall 33 supports the reaction caused by the driving of the propeller 40, and the mounting base 41 is installed on the concrete floor 31 to firmly install the propeller 40. The propeller 40 includes a propulsion jack 43 and a propelling plate 44 is installed on one side to drive the propulsion body 1 by driving the propulsion jack 43 through a hydraulic device (not shown). At this time, the computer means of the construction control room 70 may be electrically connected to the hydraulic device to remotely control the propeller 40 by remotely controlling the driving of the hydraulic device. The thruster 40 is equipped with an automatic laser level 46 to determine or modify the position at which the tubular body 1 is propelled.

The tubular body 1 is mounted between the pushing plate 28 and the excavator 50, the excavator 50 may be composed of a rotary bit 51 and a screw auger 53 and the auger shaft 55. Rotating bit 51 is equipped with a variety of forms depending on the type of ground, is rotated by the power of hydraulic, pneumatic or motor to excavate the ground. The screw auger 53 and the auger shaft 55 installed at the rear of the rotary bit 51 transfer the dirt excavated by the rotary bit 51 to the rear and discharge it to the propulsion base A. Computer means of the construction control room 70 may be electrically connected to any one of the hydraulic means, pneumatic or motor power means to remotely control the excavator 50 by remotely controlling the driving of the power means. The excavator 50 is provided with a CDC camera 56 for checking the working environment in the front, a progress control cylinder 57 for controlling the direction of the rotation bit 51, and an automatic laser adjustment system 58. Can be.

Filler 60 is provided on the top of the concrete support wall 33 has a mixer 61 for mixing and supplying the filler, the filler of the blender 61 to the tubular body 1 through the supply hose 63 It is supplied and sprayed through a nozzle 65 provided to surround the outer periphery of the tubular body 1 in a state spaced apart from the tubular body 1 by a predetermined thickness on the outer periphery of the tubular body 1. The computer means of the construction control room 70 may be electrically connected to any one of the hydraulic means, pneumatic or motor driving the mixer 61 to remotely control the filling machine 60 by remotely controlling the driving of the power means. have. Various materials may be used as the filler, and it is suitable to use bentonite.

8 is a view showing a combination of the excavator and the guide wire in the present invention.

As shown in FIG. 8, when the installation of the propeller 40, the excavator 50, and the filler 60 is completed at the propulsion base A, the guide wire 23 exited to the propulsion base A is completed. The tip 23a is coupled to idle at the tip of the auger shaft 55 of the excavator 50.

For example, a tubular idling member 80 having a bearing member 81 is formed at the tip of the auger shaft 55 of the excavator 50, and the tip 23a of the guide wire 23 is idling member. By being fitted and fixed to the 80, it can be idling from the auger shaft 55 of the rotating excavator 50. A plurality of screw grooves 23b may be formed at the tip 23a of the guide wire 23, and the bolt member 83 is screwed into the screw groove 23b by penetrating the idle member 80, thereby providing a guide wire. The tip 23a of the 23 may be firmly coupled so as not to fall into the idle member 80.

9 is a view showing a state in which the operation by operating the winch and the propeller and the excavator in the present invention.

As shown in FIG. 9, when the front end 23a of the guide wire 23 is coupled to idle with the front end of the auger shaft 55 of the excavator 50, the rotary bit 51 of the excavator 50 is engaged. By applying power and driving the propulsion machine 40 driven by the rotary bit 51 by driving the propeller 40, the winch 20 is operated to wind the guide wire 23, thereby driving the excavator ( Pull 50) to guide the progress of the excavator 50.

That is, the computer means of the construction control room 70 operates the power means of the excavator 50 to drive the rotary bit 51. At the same time, the computer means of the construction control room 70 controls the hydraulic device of the propeller 40. By actuating the propulsion jack 44 to drive the propulsion plate 44, thereby pushing the propulsion plate 44 by the excavator 50, the rotary bit 51 is advanced to excavate the ground.

At the same time, the computer means of the construction control room 70 operates the drive motor of the winch 20 so that the winch 20 winds the guide wire 23 and thereby pulls the excavator 50 so that the excavator ( Guide 50).

When the progress of the excavator 50 is guided by the guide wires 23 as described above, the straightness to the final destination B, which is the final destination, can be maintained accurately. Computer means of the construction control room 70 can check the traveling direction of the excavator 50 through the information transmitted from the camera 56, and may be excavated through the progress control cylinder 57 and the automatic laser adjustment system 58 If a direction error occurs, it can be corrected.

10 is a view showing a state of supplying the tubular body by reversing the propeller in the present invention.

As shown in FIG. 10, when propulsion of the excavator 50 is completed, the computer means of the construction control room 70 stops the operation of the excavator 50, the winch 20, and the propeller 40, and the hoist. The tubular body 1 is mounted between the excavator 50 and the propeller 40 using the crane 90. Operation of the hoist crane 90 can be made by an operator.

That is, the computer means of the construction control room 70 stops the operation by cutting off the power of the excavator 50 and the winch 20, and propels the propeller 40 to the original state by pushing the propulsion jack 43 of the propeller 40. After reversing, the operation of the propulsion jack 43 is stopped. Subsequently, the tubular body 1 is supplied and mounted between the excavator 50 and the propeller 40 using the hoist crane 90.

FIG. 11 is a view showing a state in which the winch, the propulsion machine and the excavator are used to propel the tube and apply the filler to the outer periphery of the tube.

As shown in FIG. 11, when the supply of the tubular body 1 is completed between the excavator 50 and the propeller 40, the stopped excavator 50, the winch 20, and the propeller 40 are restarted. The filler is applied to the outer periphery of the tubular body 1 through a nozzle 65 installed to cover the outer periphery of the tubular body 1 by operating the filler 60 while driving the tubular body 1.

As the computer means of the construction control room 70 drives the propeller 40, the pushing plate 44 is advanced through the propulsion jack 43, and at the same time, the driving bit 51 of the excavator 50 is driven to drive the excavator. 50 digs and moves forward. At the same time, the computer means of the construction control room 70 operates the mixer 61 of the filler 60 so that the filler is sprayed through the nozzle 65 and applied to the outer periphery of the tubular body 1 with a predetermined thickness.

12 is a view showing a state of removing the obstacle by opening a part of the head of the excavator in the present invention.

As shown in FIG. 12, obstacles such as stones (stones, amber stones, etc.), logs, steel materials (H beams, etc.), etc., impede progress of the excavator 50 while driving the tube 1 to which the filler is applied. If generated, the part 59a of the head 59 of the excavator 50 is opened and closed to remove the obstacle.

For example, the head of the excavator 50 equipped with the rotary bit 51 has a funnel shape so that the excavated soil can be easily discharged through the screw auger 53. Part of the funnel-like head 59 (59a) is detachably mounted through a bolt coupling method or the like, and if an obstacle occurs in the excavator 50 due to an obstacle, the worker enters the excavator 50 and enters the head ( A part 59a of the 59 is separated and opened, and an obstacle is removed by using a device such as a welder, a saw, a hammer drill, or the like through the part 59a of the open head 59. In this case, it is preferable that the worker wears an oxygen mask so as not to receive an obstacle due to oxygen deficiency.

Figure 13 is a view showing a state in which the propulsion of the tubular body is completed in the present invention. 14 is a cross-sectional view showing a state in which the tube body is pushed in the present invention.

As shown in FIG. 13, the computer means of the construction control room 70 repeatedly operates and stops the excavator 50, the winch 20, the propeller 40, and the filler 60, and the filler is applied. The propulsion method of the present invention is completed when the tubular body 1 is propagated until reaching the arrival base B.

On the other hand, as shown in Figure 14, with the propulsion of the tubular body (1), the filler applied to the tubular body (1) is filled in the overload (C), which causes the excavation (C) is generated to the outside of the tubular body (1) There is no work and the life of the tube 1 is greatly extended due to the filler applied.

As described above, according to the present invention, pipe laying can be accurately and quickly made by guiding and pulling the progress of the excavator at the reaching base. This can significantly reduce cost and air. In addition, since an obstacle occurs to stop the progress of the excavator or change the direction, the work efficiency can be greatly increased.

A: propulsion base B: reach base
C: overtime
1: tube 10: horizontal boring machine
13: guide ball 20: winch
23: guidewire 23a: tip
23b: thread groove 31: concrete floor
33: concrete support wall 40: propeller
41: mounting base 43: propulsion jack
44: propulsion plate 46: automatic laser level
50: excavator 51: rotation bit
53: screw auger 55: auger shaft
56: CDC Camera 57: Progress Control Cylinder
58: automatic laser adjustment system 59: head
59a: head part 60: filler
61: Blender 63: Supply Hose
65: nozzle 70: construction control room
80: idle member 81: bearing member
83: bolt member 90: hoist crane

Claims (4)

  1. A first step of digging underground at both points crossing the tubular body to build a propulsion base and an arrival base;
    A second step of installing a horizontal boring machine at any one of the propulsion base and the reaching base, and drilling a guide hole penetrating the propelling base and the reaching base through the horizontal boring machine and the casing;
    A third step of installing a winch in which the guide wire is wound at the reaching base, and releasing the guide wire from the winch and inserting the guide wire into the guide hole, and inserting the guide wire into the guide hole so that the tip end of the guide wire comes out of the propulsion base. ;
    A fourth step of forming concrete floor by placing concrete on the bottom of the propulsion base and forming a concrete support wall on a rear wall of the propulsion base;
    A fifth step of installing a propeller in front of the concrete support wall to fix the concrete floor, and installing an excavator having a rotating bit, a screw auger and an auger shaft in front of the propeller, and installing a filler in the concrete support wall;
    A sixth step of coupling the tip of the guide wire exiting the propulsion base to idle with the tip of the auger shaft of the excavator;
    The power is applied to the rotating bit of the excavator and the propulsion of the excavator powered by the rotating bit is performed by driving the propeller, while the winch is pulled to wind the guide wire to pull the excavator. A seventh step of guiding the progress of the;
    An eighth step of stopping the operation of the excavator, the winch and the propeller when the propulsion of the excavator is completed and supplying and mounting the tubular body between the excavator and the propeller;
    A ninth step of applying the filler to the outer periphery of the tubular body through a nozzle installed to cover the outer periphery of the tubular body by reactivating the stationary excavator, the winch and the propeller to propel the tubular body; And
    And a tenth step of repeatedly operating and stopping the excavator, the winch, the propeller, and the filler, and pushing the tubular body to which the filler is applied until reaching the reaching base,
    The operation of the excavator, the winch, the propeller and the filling machine is controlled in a construction control room equipped with computer means,
    An idling member having a bearing member is installed at the tip of the auger shaft of the excavator, and the tip of the guide wire is idling from the auger shaft of the excavator which is rotated by being coupled to the idling member.
    If there is an obstacle in the progress of the excavator due to the obstacle, underground buried pipe propulsion method, characterized in that for removing the obstacle by opening and closing a part of the head of the excavator.
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KR1020120100759A 2012-09-12 2012-09-12 Propulsion mithod of pipe for underground laying KR101241082B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015166294A1 (en) * 2014-05-02 2015-11-05 Tecnosuelo, S.A. De C.V. System and method for building microtunnels

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11303556A (en) * 1998-04-20 1999-11-02 East Japan Railway Co Excavator and excavation method
KR20040063098A (en) * 2004-06-14 2004-07-12 모악개발 주식회사 Reamer and push-aside cap and apparatus provided with them for conduit line laying by trenchless type and methods using the same
KR20040082937A (en) * 2003-03-20 2004-09-30 (주)동양엠티 Method for Digging a Tunnel
KR100515684B1 (en) * 2005-03-09 2005-09-16 석정건설(주) Propulsion method of construction and the device for pipe piercing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11303556A (en) * 1998-04-20 1999-11-02 East Japan Railway Co Excavator and excavation method
KR20040082937A (en) * 2003-03-20 2004-09-30 (주)동양엠티 Method for Digging a Tunnel
KR20040063098A (en) * 2004-06-14 2004-07-12 모악개발 주식회사 Reamer and push-aside cap and apparatus provided with them for conduit line laying by trenchless type and methods using the same
KR100515684B1 (en) * 2005-03-09 2005-09-16 석정건설(주) Propulsion method of construction and the device for pipe piercing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015166294A1 (en) * 2014-05-02 2015-11-05 Tecnosuelo, S.A. De C.V. System and method for building microtunnels

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