JPH07206389A - Winch device for pulling out screw auger in its propulsion construction method - Google Patents

Abstract

PURPOSE:To prevent collapse of sand and to improve safety by a method wherein a hand winch is arranged between framed stays and a resistance rod is caused to span between a stay and a pressure plate forced into contact with a wall surface in which a pull-out port is formed. CONSTITUTION:After a horizontal pit 2 is excavated through earth by a screw auger propulsive machine, a winch device 20 is installed in a pit 1 for propulsion. Namely, a pair of right and left stays 21 are erected in a state to make contact with a wall surface 3 on the inner peripheral side crossing the pull-out direction of a screw auger 10. The wire 25 of a hand winch 24 is disposed on the horizontal pit 2 side through a pulley 26 and the tip part of the wire 25 is mounted in a screwed-in state on the end part of the screw auger 10. A reaction force plate 29 attached on the other end side of the resistance rod 30 is then brought into contact with the vicinity of the opening edge of the horizontal pin 2 on the wall surface 4 side of the pit 1 for propulsion. With this state, the hand winch 24 is rotationally operated to wind the wire 25 and the screw auger is pulled out through the horizontal pit 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention excavates and opens a horizontal hole for drawing in a small or medium diameter gas pipe or the like into the ground, and then introduces the drawing pipe into the horizontal hole after opening. The present invention relates to a winch device for pulling out by a screw auger propulsion method for pulling out together with an auger.

[0002]

2. Description of the Related Art Conventionally, when a gas pipe of small or medium diameter (25 A to 75 A) is laid in the soil, it is required to use a screw auger propulsion machine in the ground between the propulsion pit and the arrival pit. A laying method is known in which a horizontal hole having a diameter is drilled and opened, and after the horizontal hole is opened, a gas pipe to be laid inside the horizontal hole is drawn in from the reaching pit side and is pulled out together with the auger.

When carrying out this laying method, a worker enters the propulsion pit or the arrival pit to perform work. Therefore, as a safety measure, wall sand is placed in the vertical holes of the propulsion pit and the arrival pit. In order to prevent the soil from collapsing, a steel material called "mountain retaining" to prevent sediment collapse is attached.

[0004]

When the above-mentioned pipe laying method is carried out, when the above-mentioned steel material for preventing sediment collapse is installed inside the vertical holes of the propulsion pit and the reaching pit, the working space in the pit is limited. Therefore, there is a problem that the work is difficult to perform, and additionally, a material for retaining the mountain is specially required, and the construction cost is also high.

In the pipe laying method, the auger is pulled out by the main body of the propulsion device installed in the propulsion pit, and at the same time the gas pipe to be laid is pulled into the lateral hole. There was also a problem that the auger that was pulled out interfered with the material for retaining the mountain, and the workability of pulling out was poor.

The present invention has been made in view of the above circumstances, and is a screw auger propulsion system capable of reducing the safety and workability and the construction cost when the screw auger is pulled out in the screw auger propulsion method. It is an object of the present invention to provide a winch device for pulling out a construction method.

[0007]

In order to achieve the above-mentioned object, the present invention has a propulsion pit and a reaching pit excavated under the ground at a required distance, and is provided in a vertical hole of the propulsion pit. A screw auger propulsion machine is installed in the machine to propel a plurality of screw augers of the required length in series in order and propel them into the soil to excavate and open a lateral hole of the required diameter in the ground to reach the pit for reaching. In a winch device in which a lead-in pipe is introduced from the arrival pit side into the later lateral hole and pulled out to the propulsion pit side together with the auger, the above winch device is configured as follows.

That is, in the winch device according to the present invention, a hand-wound winch for driving a winding cylinder by a turning operation of a manual handle and a tip of a wire wound on the winding cylinder are pulled out between a pair of left and right framed columns. And a pulley for diverting along the direction, the pair of left and right columns is erected adjacent to the inner wall surface facing the extraction direction in the vertical hole of the propulsion pit, and the columns and the extraction port are A resistance rod that receives a pulling reaction force is installed between the reaction force plate and the reaction force plate that is brought into contact with the inner wall surface that is opened, and the reaction force plate that is pressed against the support rod and the resistance rod is the propulsion pit. The winch device is installed in the propulsion pit so as to have a function of preventing the collapse of the earth and sand inside the vertical hole.

[0009]

According to the present invention thus constructed, after the horizontal hole is excavated and opened in the soil by the screw auger propulsion device, the winch device is installed in the propulsion pit and the winch device is pulled in from the reaching pit side. When pulling out the pipe together with the auger, the pair of left and right columns that constitute the winch device fulfills the function of preventing the collapse of the earth and sand against the inner wall surface facing the pulling direction, and is also pressed against by the resistance rod. Power board
By performing the function of preventing the collapse of the earth and sand against the inner peripheral wall surface on the side of the extraction port facing this, it is not necessary to install special steel material for mountain retaining in the vertical hole of the propulsion pit.

As a result, the material for mountain retaining can be eliminated
The working space in the propulsion pit can be widely used, and the inconvenience that the pulled-out auger interferes with the material for retaining the mountain can be eliminated.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show an embodiment of a pulling winch device in the screw auger propulsion method of the present invention.

As shown in these figures, a propulsion pit 1 is excavated under the ground at a position separated by a required distance from an unillustrated arrival pit. Between the propulsion pit 1 and the reaching pit, a lateral hole 2 having a required diameter, which has been excavated and opened by a plurality of screw augers 10, is formed.

Here, the screw auger 10 is for propelling in the soil by the rotation of the screw blade 9.
By screwing the male screw portion 11 provided at the end of another screw auger 10 to the female screw portion 12 provided at the end, the screw auger 10 is added in series and propelled in the soil. It reaches the pit side for reaching. By the way, after the horizontal hole 2 is opened, a lead-in pipe (not shown) is introduced from the arrival pit side and pulled out together with the screw auger 10 to the propulsion pit 1 side by the pull-out winch device 20 to be described later. 2 It is designed to be laid inside.

A pull-out winch device (hereinafter referred to as a winch device) 20 is provided with a pair of left and right columns 21 framed by a lateral member 27 and a pulley shaft 28.

At a substantially central portion of the lateral member 27, a hand-wound winch 2 for driving the winding drum 23 by rotating the manual handle 22.
4 is attached. A pulley 26 is rotatably attached to the pulley shaft 28 side so as to detour the tip end side of the wire 25 wound by the winding drum 23 along the drawing direction. A horizontal member 31 that supports one end of the resistance rod 30 is disposed above the pulley shaft 28. On the other end side of the resistance rod 30, a reaction force plate 29 that is in contact with the vicinity of the lateral hole 2 on the wall surface 4 side where the lateral hole 2 of the propulsion pit 1 is formed is attached. In addition, although the case where one resistance rod 30 is arranged is described in this example, the present invention is not limited to this, and the number of resistance rods 30 is two, and the reaction plates are provided on both opening edge sides sandwiching the lateral hole 2. You may make it contact 29.

Subsequently, the winch device 2 having such a configuration
The pulling out work in the screw auger propulsion method by 0 will be described.

First, a lateral hole 2 is excavated and opened in the soil by a screw auger propulsion machine (not shown), and then a winch device 20 is installed in the propulsion pit 1. Winch device 2
When installing 0, the pair of left and right columns 21 is brought into contact with the inner wall surface 3 side facing the pulling direction (the arrow a direction in FIG. 3) of the screw auger 10. At this time, it is preferable to adjust the installation of the columns 21 so that the substantially middle portion of the pair of left and right columns 21 is located on the extension line of the lateral hole 2. As described later, it is necessary to engage the wire 25 of the hand-wound winch 24 with the pulley 26 rotatably attached to the pulley shaft 28 to detour to the side of the lateral hole 2 and the pulley 26 serving as a detour point is If the wire 25 is deviated from the extension of the lateral hole 2, the wire 25 bypassed by the pulley 26 cannot be straightened to the lateral hole 2, and the screw auger 10 can be pulled out from the lateral hole 2 along the shape of the lateral hole 2. This is because it will be difficult.

After adjusting the installation of the column 21, the wire 25 of the hand-wound winch 24 is engaged with the pulley 26 rotatably attached to the pulley shaft 28 so as to be diverted to the side of the lateral hole 2 and the tip of the wire 25 is The male screw portion 11 of the portion is screwed to the female screw portion 12 of the screw auger 10.

Next, the reaction plate 29 attached to the other end of the resistance rod 30 is brought into contact with the vicinity of the opening edge of the lateral hole 2 on the wall surface 4 side of the propulsion pit 1.

After that, the wire 25 of the hand-wound winch 24 is engaged with the pulley 26 rotatably attached to the pulley shaft 28 so as to be diverted to the side of the lateral hole 2, and the male screw portion 11 at the tip of the wire 25 is screwed. It is screwed onto the female screw portion 12 of the auger 10.

In this state, the manual handle 22 of the hand-wound winch 24 is rotated to rotate the winding drum 23 to wind the wire 25. As a result, the screw auger 10 is pulled out from the lateral hole 2, so that the screw auger 10 pulled out by unscrewing the male screw portion 11 of the pulled screw auger 10 and the female screw portion 12 of the adjacent screw auger 10 is pulled out. After the removal, the male threaded portion 11 of the tip end of the wire 25 is screwed to the female threaded portion 12 of the screw auger 10 again, and the manual handle 22 of the hand-wound winch 24 is rotated to operate the screw auger 10 in the same manner as above. Pull out from side hole 2. By repeating these operations in sequence, all the screw augers 10 inside the lateral hole 2 are pulled out, and at the same time, a lead-in pipe is laid inside the lateral hole 2.

At this time, the pair of left and right columns 21 constituting the winch device 20 fulfill the function of preventing the collapse of earth and sand against the wall surface 3 on the inner peripheral side facing the extraction direction and are pressed against each other via the resistance rod 30. The reaction force plate 29 has a function of preventing the collapse of the earth and sand in the vicinity of the opening edge portion of the lateral hole 2 of the inner peripheral wall surface 4 facing it. At this time, the pull-out reaction force when pulling out the screw auger 10 is received by the reaction force plate 29 via the resistance rod 30.

As described above, in this embodiment, after the horizontal hole 2 is excavated and opened in the soil by the screw auger propulsion machine,
When the winch device 20 is installed in the propulsion pit 1 and the pipe drawn from the arrival pit side is pulled out together with the screw auger 10, the pair of left and right columns 21 forming the winch device 20 face each other in the pulling direction. It functions to prevent the collapse of earth and sand against the wall surface 3 on the circumferential side, and the resistance rod 30
Since the reaction force plate 29 pressed against the inner wall surface 4 on the extraction port side facing the same functions to prevent the collapse of earth and sand, a steel material for retaining the mountain is provided in the vertical hole of the propulsion pit 1. Eliminates the need for special installation.

As a result, it is possible to eliminate the need for a material for retaining the mountain,
The work space in the propulsion pit 1 can be widely used, and the inconvenience that the pulled-out screw auger 10 interferes with the material for mountain clamping can be eliminated, so that safety, workability, and construction cost can be reduced.

Further, in this embodiment, the winch device 2 is used.
0 is installed in the propulsion pit 1 and the pipe is pulled out together with the screw auger 10 from the arrival pit side. However, the present invention is not limited to this, and existing pipes and the like are exposed in the propulsion pit 1, If it interferes with the work, the winch device 20 is installed in the arrival pit, and the propulsion pit 1
The pipe may be pulled out from the side.

[0026]

As described above, according to the extraction winch device in the screw auger propulsion method of the present invention, the winch device is installed in the propulsion pit after the horizontal hole is excavated in the soil by the screw auger propulsion device. When pulling out the pipe drawn from the side of the arrival pit with the auger installed, the pair of left and right struts that make up the winch device has a function to prevent the collapse of sediment against the inner wall surface facing the pulling direction. In addition, the reaction force plate pressed against the resistance rod has a function of preventing the collapse of the earth and sand against the inner wall surface on the side of the extraction port that faces it, so that it is used as a clasp in the vertical hole of the propulsion pit. There is no need to install special steel materials.

As a result, the material for mountain retaining can be eliminated
The work space in the propulsion pit can be widely used, and the inconvenience that the pulled-out auger interferes with the material for mountain retaining can be eliminated, so that safety, workability, and construction cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a pulling winch device in a screw auger propulsion method of the present invention.

FIG. 2 is a front view showing the extraction winch device of FIG.

3 is a plan view showing the extraction winch device of FIG. 1. FIG.

[Explanation of symbols]

 1 Propulsion Pit 2 Horizontal Hole 10 Screw Auger 20 Winch Device 21 Strut 22 Manual Handle 23 Winding Body 24 Manual Winding Winch 25 Wire 26 Pulley 29 Reaction Plate 30 Resistance Rod

Claims (1)

[Claims] 1. A plurality of units having a propulsion pit and a reaching pit excavated at a required distance below the ground, and having a required length by installing a screw auger propulsion machine in a vertical hole of the propulsion pit. The screw augers are sequentially added in series and propelled into the soil to excavate and open a horizontal hole of the required diameter in the ground that reaches the arrival pit, and then, from the arrival pit side, insert a piping into the horizontal hole after opening. In the extraction winch device in the screw auger propulsion construction method in which the winch device is introduced and pulled out to the propulsion pit side together with the auger, the winch device drives the winding drum by rotating the manual handle between a pair of left and right framed columns. It has a hand-wound winch and a pulley for circumventing the tip of the wire wound on the winding cylinder along the pulling-out direction, and the pair of left and right columns is placed in the vertical hole of the propulsion pit. A resistance that receives a pull-out reaction force between the column and a reaction plate abutted against the inner wall surface where the pull-out port is opened, which is erected adjacent to the inner wall surface facing the pull-out direction. A winch device shall be installed in the propulsion pit so that the reaction force plate pressed against the support pillar and the resistance rod has a function of preventing the collapse of the earth and sand in the vertical hole of the propulsion pit by installing the rod. A winch device for extraction using the screw auger propulsion method.