JPH06288184A - Underground burying method for pipe and earth removing device for buried pipe - Google Patents

Abstract

PURPOSE:To surely hold the reaction force required for an advance even if the advance speed is changed according to the state of the ground and a site and surely and easily remove the earth from one vertical hole regardless of the length of buried pipes. CONSTITUTION:Pipes 3 are thrust by the impact force of a propulsion machine 2 from one vertical hole 11 while being added to reach the other vertical hole 12 between a pair of vertical holes 11, 12. An earth removing member 72 fitted at the tip of rods 73 is thrust into the buried pipes 3 by the impact force from one vertical hole 11 while the rods 73 are added, and the earth is removed to the other vertical hole 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for embedding a pipe such as a steel pipe in the ground and discharging the earth and sand filled in the buried pipe, and a method for embedding the pipe in the ground. It relates to a soil discharge device for a buried pipe.

[0002]

2. Description of the Related Art A method is known in which a steel pipe is impact-promoted and embedded in soil by using a propulsion device, the steel pipe is used as a sheath pipe, and a pipe for transporting a fluid such as gas is inserted into the steel pipe. There is. In the prior art, the propulsion unit is connected to the end of the steel pipe on the downstream side in the propulsion direction so that the propulsion unit does not separate from each other, and the thrust of the propulsion unit is controlled so that the steel pipe can be propelled into the ground by the impact force of the propulsion unit. Trying to hold power.

Further, in the prior art, after the completion of the propulsion work, an electric earth auger is used to discharge the earth and sand in the pipe.

[0004]

In such a prior art, when the propulsion speed changes depending on the ground or the situation of the site, it is impossible to reliably transmit the reaction force and the force necessary for the propulsion device. I have a hard time.

Further, also in the earth removal treatment after the completion of the propulsion, when the diameter of the pipe is as large as 200 mm to 400 mm, the maximum diameter of the earth auger that can be used manually is 15 at maximum.
Since the diameter is 0 mm and the diameter is small, it takes time to remove the soil, and if the pipe length becomes long, it is necessary to remove the soil from both vertical holes (pits), and also in the soil removal work. I often have a hard time.

An object of the present invention is to reliably hold a reaction force regardless of the propulsion state of a pipe to be buried underground, and to add an attachment having a simple structure to a device used for underground buried. Thus, it is an object of the present invention to provide a method for underground burying a pipe and an earth pipe unloading device that enable easy and reliable soil unloading from a vertical hole on the pushing side.

[0007]

According to the present invention, a pair of vertical holes are excavated from the ground, and a pipe is added from one vertical hole between both vertical holes while being pushed by impact force to reach the other vertical hole. Then, the soil discharging member attached to the tip of the rod is pushed by the impact force while adding the rod from the vertical hole on the pushing side of the pipe to discharge the soil to the other vertical hole. It is a medium burial method.

Further, according to the present invention, there are provided a propulsion unit having an impact propulsion force, a pipe which is disposed downstream of the propulsion unit in the propulsion direction and abuts on the propulsion unit, and which is to be buried underground, and the propulsion unit. A guide means for guiding the axis so as to be in a straight line, a rope connected to the propulsion device, and a winch provided in the guide means for pulling the rope to apply a force downstream of the propulsion direction to the propulsion device. In order to connect the soil discharging member and the propulsion device, the soil discharging member having a pressing body having an outer diameter slightly smaller than the inner diameter of the pipe and being inserted into the pipe, and being extendable between them. An earth removing device for a buried pipe, wherein the earth removing device has one end connected to an earth discharging member and the other end connected to a propulsion head of a propulsion device.

[0009]

According to the present invention, the pipe can be buried in the ground up to the other vertical hole relatively easily by pushing the pipe while adding the pipe from one of the pair of vertical holes while applying the impact force. Immediately after that, the impact force used for burying the pipe can be utilized to push out the earth and sand in the pipe from the vertical hole on the pushing side by the earth discharging member and discharge it to the other vertical hole. Even in this case, by adding a rod connected to the soil discharging member, it is possible to discharge soil from the vertical hole on the pushing side even if the pipe has a long length.

Further, according to the present invention, the impact propulsion force by the propulsion device is controlled by the guide means so that the pipe to be buried underground, the propulsion device, and their axes are aligned with each other.
The rope that is pulled by the winch always acts on the pipe and can receive the reaction force, ensuring the reaction force necessary for the propulsion even if the propulsion speed changes depending on the ground or the situation of the site. It is possible to receive. Furthermore, by combining an earth discharging member and a rod with this propulsion device, the same impact propulsion force can be used to reliably and easily discharge the earth and sand in the buried pipe from one vertical hole side. It is possible.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of an underground pipe burying device 1 of an embodiment used for carrying out the method of the present invention. Due to the impact force of the propulsion device 2, the steel pipe 3 to be buried underground is propelled to the left in FIG. 1 along the guide means 4 and buried in the ground. A substantially U-shaped support member 5 is fixed to an end portion of the guide means 4 on the downstream side (left side in FIG. 1) in the propelling direction,
The supporting member 5 has a holding piece 6 extending downstream in the propulsion direction.
And a mounting piece 7 extending upward is fixed to the holding piece 6.

FIG. 2 is a sectional view showing a state in which the steel pipe 3 is propelled and buried underground by using the underground pipe burying device 1 shown in FIG. For example, on the road 8, a waterway 9 which is a concrete pipe is provided, as clearly shown in FIG.
It is installed across the soil and below the waterway 9 the soil 1
Within 0, the steel pipe 3 is propelled to pass the water channel 9. After the steel pipe 3 is buried in the soil 10, the steel pipe 3 is used as a sheath pipe to insert a pipe for transporting fluid such as gas and water into the pipe 3 buried underground. When burying the steel pipe 3 in the ground using the underground burying device 1 for such a pipe, a vertical hole 11 is excavated in the soil 8 on one side of the water channel 9, and the water channel 9 is formed on the opposite side of the vertical hole 11. Drills another vertical hole 12. In one of the vertical holes 11, the pipe underground burying device 1 according to the present invention is arranged, and the attachment piece 7 is attached to the water channel 9.
To the side wall and the mounting piece 7 is fixed. In this way, the steel pipe 3 can be propelled into the soil 10.

FIG. 4 is a sectional view taken along the section line IV-IV in FIG. 1, and FIG. 5 is a plan view of the underground pipe burying device 1. With reference to these drawings, the guide means 4 is made of channel steel and comprises a web 13 and a pair of flanges 14. The steel pipe 3 is mounted on the upper end of the flange 14. Propulsion machine 2
Is in contact with the end 16 on the upstream side in the propulsion direction of the steel pipe 3 via the impact force transmission member 15, and the holder 17 is attached to the end on the upstream side in the propulsion direction of the propulsion device 2. Be fitted. The impact force transmission member 15 and the holder 17 are also mounted on the upper end of the flange 14 of the guide means 4. In this way, the propulsion device 2, the steel pipe 3 arranged on the downstream side in the propulsion direction of the propulsion device 2, the impact force transmission member 15, and the holder 17 are guided so that their respective axes are aligned.

The support member 5 includes an upper plate 18 and the upper plate 18
And a side plate 19 extending downward from the side plate 19, and a spacer 20 is interposed between the lower portion of the side plate 19 and the flange 14 of the guide means 4, and a combination of a bolt and a nut 21 is provided.
The flange 14, the side plate 19, and the spacer 20 are thereby fixed. The spacer 20 prevents the steel pipe 3 on the flange 14 from coming into contact with or coming into contact with the side plate 19.

A manual winch 23 is attached to the upper plate 18 of the support member 5. In this winch 23, the upper plate 18
Brackets 25 and 26 are erected on the bottom plate 24 fixed to the rotary shaft 2 of the rotary shaft 2 between the brackets 25 and 26.
It is rotatably provided by 8. Collars 29 and 30 are fixed to both ends of the winding drum 27 in the axial direction. An internal gear 31 is engraved on one of the collars 29, and a gear 32 meshes with the internal gear 31. The gear 32 is fixed to a rotating shaft 33, and is rotatably provided on one bracket 31, and a ratchet wheel 34 a is fixed to the rotating shaft 33. A handle 34 is attached to the rotating shaft 33. A pawl 35, which is swingably provided on the bracket 25, is engaged with the pawl wheel 34a. On the winding drum 27, one end of the rope 36, which is a steel wire rope, is fixed and wound. The cord 36 is wound around a drum-shaped roller 37, which is rotatably provided on the holding piece 6, about half a turn, extends from the roller 37 to the upstream side in the propulsion direction (rightward in FIGS. 1 and 5), and further extends. Article 3
8 and is connected to a locking ring 39 fixed to the end surface of the holder 17.

FIG. 6 is a horizontal sectional view of the holder 17.
The holder 17 has a storage recess 41 into which a rear end portion 40 of the propulsion device 2 on the upstream side in the propulsion direction is detachably fitted, and further has an insertion hole 42. A flexible tube 43, which is connected to the rear end portion 42 of the propulsion device 2 and supplies compressed air, to the insertion hole 42.
Is inserted. The outer diameter D3 of the holder 17 is the same as the outer diameter of the steel pipe 3, and is uniform in the axial direction.

FIG. 7 is a sectional view taken along the section line VII-VII in FIG. Support pieces 44 are fixed to both sides of the holder 17, and the support pieces 44 are provided with wheels 15 rotatably on opposite sides thereof. The pair of flanges 14 of the guide means 4 has upper and lower paired rails 46 fixed to the outer surface thereof, and wheels 45 are arranged between the paired upper and lower rails 46. This allows the holder 17 to move along the flange 14 without being disengaged from the guide means 4. Holder 1
The pair of connecting pieces 39 fixed to 7 are arranged in a virtual horizontal plane passing through the axis of the holder 17. Thus line 3
When the 6 and the branched line 38 are towed by the winch 23, a force is applied to the downstream side (left side in FIGS. 1 and 5) in the propulsion direction substantially parallel to the axes of the propulsion device 2 and the steel pipe 3. be able to.

FIG. 8 is a sectional view near the rear end portion 16 of the steel pipe 3. At the rear end portion 16 of the steel pipe 3, the impact force transmission member 15
The fitting portion 48 of is fitted detachably. The outer diameter D1 of the base end portion 49 of the impact force transmitting member 15 on the upstream side in the propelling direction is
It is the same as the outer diameter D2 of the steel pipe 3. The outer diameter D1 of the impact force transmitting member 15 is the same as the outer diameter D3 of the holder 17 described above. A propulsion head 63 described later fits into the recess 50 of the impact force transmission member 15.

When the pipe 3 is buried in the soil 10 below the water channel 9 by the underground burying device 1 and is buried, the mounting hole 5 formed in the mounting piece 7 is used.
3 is fixed to the side wall of the water channel 9 with a nail or a bolt or the like, and the holder 17, the propulsion device 2, the impact force transmission member 15 and the steel pipe 3 are arranged from the upstream side to the downstream side in the propulsion direction. Is pulled by a winch 23, and a force is applied to the holder 17 toward the downstream side in the propulsion direction (left side in FIGS. 1, 2 and 5). The operator applies a force to the handle 34 of the winch 23 in the direction in which the winding cylinder 27 winds the rope 36. In this way, the ratchet wheel 34a and the claw 35 are locked, and the cords 36, 3
A pulling force acts on 8, and the reaction force at the time of propulsion of the propulsion device 2 and the steel pipe 3 can be received by the ropes 36 and 38, and the worker rotates the handle 34 according to the propulsion displacement of the steel pipe 3 and winds it. The rope 36 is wound up by the body 27. At this time, the cord 36 is located in the upper part 5 on the upstream side of the impact force transmitting member 15 in the propelling direction.
4 is wound by the winch 23 in response to the propulsive movement of the steel pipe 3 even though it is in contact with the wire 4, so that the wire 36 slides over a large distance even if the wire 36 is in contact with the upper portion 54. Therefore, damage to the wire 36 is prevented.

Although the impact force transmission member 15 is prepared according to the outer diameter of the pipe 3 to be buried in the ground, as another embodiment of the present invention, as shown in FIG. The auxiliary pipes 56 and 57 may be fitted into the impact force transmission member 55 for the above according to various pipes larger than that.

A holder 17 is also prepared according to the outer diameters of the various tubes 3. In the ground propulsion device 2, for example, a propulsion head 63 is urged rearward in a propulsion direction 65 by a spring 64 at a tip of a main body 62 in which a piston 61 is housed in a cylindrical body 60 having a configuration shown in FIG. 10. ing. Body 62
When the piston 61 moves forward in the inside by compressed air from the flow path 66, the state of FIG. 10 (1) changes to the state of FIG. 10 (2), and the tip of the piston 61 contacts the propulsion head 63. When the piston 61 and the propulsion head 63 are in contact with each other, compressed air flows from the pressure chamber 67 to the tip side 69 of the piston 61 through the hole 68. Since the pressure receiving area on the tip end side 69 of the piston 61 is larger than the pressure receiving area of the pressure chamber 67, the pressure acting on the piston 61 in the direction opposite to the propulsion direction 65 is returned to the rear of the propulsion direction 65. At this time, the propulsion head 63 returns to the original state as shown in FIG. 10C by the elastic force of the spring 64. At the same time, the compressed air on the tip side 69 of the piston 61 is discharged to the outside of the main body 62 through the hole 68. The propulsion resistance acts on the cylinder 60 of the main body 62, whereby the propulsion head 63 moves forward, and the above operation is repeated to propel the underground propulsion device 2.

The propulsion unit 2 and the winch 23 may have a structure different from that of the above-mentioned embodiment. The holder 17 is provided with a fitting 58 on its upper part, and it is also possible to connect the rope 36 to the fitting 58.

FIG. 11 is a cross-sectional view schematically showing a state in which a pipe having a long pipe length of, for example, 5 to 10 m is buried in the ground by propelling the steel pipe 3 while replenishing it by using the underground pipe burying device 1 shown in FIG. It is a figure. For example, it becomes necessary to bury underground a long steel pipe 3 along the longitudinal direction of the road. In that case, as shown in FIG. 11 (1), one vertical hole 11 on the transmitting hole side and the other vertical hole 12 on the reaching hole side are excavated at both ends of the portion to be buried, and the vertical hole 11 is formed. The underground burying device 1 is installed in the same manner as shown in FIG. 2, and the first steel pipe 3 is underground buried by impact propulsion in the same manner as shown in FIG. 11 (2). When the towing by the winch 23 is performed to the maximum limit, the towing 36 is rewound to pull the propulsion device 2 back to its original position, and the second steel pipe 3 is added to bury it underground in the same manner. Similarly, by sequentially adding the required number of steel pipes 3 after the third pipe and repeating the impact propulsion of the steel pipes 3 that have been added toward the vertical hole 12, as shown in FIG. Underground burial is performed, and finally a continuous buried pipeline is formed between both vertical holes 11 and 12. (See FIG. 11 (4)).

During the impact propulsion as described above, the soil 10 enters the steel pipe 3 through the tip opening, so that the propulsion resistance is not so great and the long pipe is smoothly propelled. Can be made.

FIG. 12 is a side view of an earth removing device 71 for a buried pipe according to an embodiment of the present invention. The illustrated soil discharging device 71 is formed by the underground pipe burying device 1 itself shown in FIG. 1, and instead of the impact force transmitting member 15, the soil discharging member 72 and the rod 73 are replaced by the propulsion device 2, the guiding means 3, Lines 36, 38,
By combining it with the entire device including the winch 23 and the winch 23, it is possible to discharge the earth and sand filled in the steel pipe 3 by impact propulsion. Therefore, in FIG. 12, the same members as those shown in FIG. 1 are designated by the same reference numerals as those in FIG. 1, and the description of the operation of impact propulsion is omitted to avoid duplication.

The earth discharging member 72 is provided with a pressing body 74 made of a metal disc having an outer diameter slightly smaller than the inner diameter of the steel pipe 3 to be buried. An attachment member for connecting the rod 73 is integrally fixed to the center of the pressing body 74 on the side opposite to the pressing surface. The mounting member is provided with a screw hole. On the other hand, for the rod 73, for example, a high-strength steel rod is used, and screws are threaded on both ends of a steel rod having a length equal to or shorter than the length of one steel pipe 3. Rod 73
Is firmly connected to the pressing body 74 by screwing the threaded portion at the tip end to the mounting member of the pressing body 74, and
It is connected to the propulsion device 2 by screwing the screw part on the rear end side into the rod connecting socket 75 fitted to the tip part of the propulsion head 63 of the propulsion device 2.

A plurality of rods 73 are prepared in advance,
By sequentially connecting via the coupling 76, it is possible to insert the pipe over the entire internal length from the starting hole side to the reaching hole side.

FIG. 13 is a sectional view of the socket 75. FIG. 14 is a sectional view of the coupling 76. The socket 75 is formed of, for example, a cylindrical body of different diameter made of cast steel, an insertion hole into which the protruding shaft portion of the tip of the propulsion head 63 is fitted is bored in the large diameter side portion, and the small diameter portion is A screw hole into which the screw portion of the rod 73 is screwed is screwed. The threaded portion is preferably a square screw whose wall of the thread groove is a smooth surface orthogonal to the screw axis, and therefore the rod 73
It is preferable that the threaded portion is also a square screw corresponding to this. By forming a square screw, rotation between the rod 73 and the socket 75 is less likely to occur due to the impact propulsive force, and the effect of preventing damage to the screw thread is great.
Further, even if stone pieces and sand enter the screw-threaded portion, they are easily discharged and do not cause clogging, which is useful in that they can be smoothly propelled in the earth and sand.

The coupling 76 is formed by a short pipe made of cast steel, and the same square screw having the same diameter and the same pitch as the square screw provided in the socket 75 is threaded on the inner wall of the pipe over the entire length in the same screw direction. . The coupling 76 is used as a connecting portion when the rod 73 is replenished, and the two rods 73 are screwed at the same length so as to be abutted from both sides of the coupling 76 at the central portion and strongly tightened. It is possible to strongly connect and integrate them, and in this case, it is also preferable to use a locking nut for tightening.

FIG. 15 is a cross sectional view schematically showing a state in which the inside of the pipe is discharged by using the buried pipe discharging device 71 shown in FIG. As shown in FIG. 11 (4), a pair of vertical holes 1
In the pipe extending between 1 and 12, earth and sand are almost filled. As shown in FIG. 11 (4), the earth removing device 7 installed in the vertical hole 11 on the starting hole side.
1 causes the impact propulsion force to discharge the earth and sand in the pipe. As shown in FIG. 15 (1), a rod 73 is connected to the soil discharging member 72 by screwing, and the rod 73 is
It is connected to the propulsion head 63 of the propulsion device 2 via the socket 75. The soil discharging member 72 is inserted into the pipe 3 opened on the vertical hole 11 side, and the soil discharging member 72 is sequentially pushed into the pipe by impact propulsion in the same manner as in the case where the steel pipe 3 is buried underground. When the towing by the winch 23 is performed to the limit, the rope 36 is rewound to pull back the propulsion unit 2 and the second rod 7
3 is replenished by one coupling 76, and the soil discharging member 72 is shock-propulsed in the pipe 3 toward the vertical hole 12 and 3
By sequentially adding the rods 73 after the main rod and repeating the impact propulsion according to the same procedure, all the soil in the continuous pipe is discharged into the vertical hole 12 as shown in FIG. 15 (2).

[0031]

As described above, according to the present invention, the shock propulsion force is transmitted to the earth discharging member by simply using the apparatus used for underground burial of a pipe by impact propulsion, and the earth and sand in the buried pipe can be easily and easily It can be reliably discharged. Further, even when the pipe length is long, it is possible to easily cope with it by adding the rods, and as a result, it is possible to bury the pipe and remove soil in the pipe in a short time and with reduced labor.

Further, according to the present invention, by applying a force downstream of the propulsion direction to the propulsion device by using a rope for pulling the pipe to be buried underground and the propulsion device guided by the guide means by the winch. Even if the propulsion speed changes depending on the ground or the situation of the site, it becomes possible to reliably receive the reaction force required for propulsion, so that the pipes can be buried and the soil in the pipes can be efficiently discharged.

[Brief description of drawings]

FIG. 1 is an overall side view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state when the steel pipe 3 is propelled into the soil 10 below the water channel 9 by using the underground pipe burying device 1 shown in FIG. 1 to be buried underground.

FIG. 3 is a plan view showing a state when the steel pipe 3 shown in FIG. 2 is buried in the ground.

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

FIG. 5 is a plan view of the underground pipe burying device 1.

FIG. 6 is a cross-sectional view of a holder 17.

FIG. 7 is a cross section line VII-V of the holder 17 in FIG.
It is sectional drawing seen from II.

8 is a sectional view of the impact force transmission member 15. FIG.

FIG. 9 is a cross-sectional view showing an impact force transmission member 55 and auxiliary tubes 56 and 57 thereof according to another embodiment of the present invention.

FIG. 10 is a cross-sectional view of the propulsion device 2.

FIG. 11 is a cross-sectional view showing a state in which the steel pipe 3 using the underground pipe burying device 1 shown in FIG.

FIG. 12 is a side view of an entire earth removing device 71 for a buried pipe according to an embodiment of the present invention.

FIG. 13 is a cross-sectional view of a rod connecting socket 75.

FIG. 14 is a sectional view of a coupling 76.

FIG. 15 is a cross-sectional view showing a state when the inside of the pipe is discharged by using the buried pipe discharging device 71 shown in FIG.

[Explanation of symbols]

 1 Underground burial device 2 Propulsion device 3 Steel pipe 4 Guide means 5 Support member 11, 12 Vertical hole 15 Impact force transmission member 23 Winch 36, 38 Cord 63 Propulsion head 71 Earth pipe unloading device 72 Excavation member 73 Rod 74 Pressing body 75 Rod connecting socket 76 Coupling

Claims (2)

[Claims] 1. A pair of vertical holes is excavated from the ground, and while adding a pipe from one vertical hole between both vertical holes, it is pushed by impact force to reach the other vertical hole and is attached to the tip of the rod. A method of underground embedding of a pipe, characterized in that the soil discharging member is pushed into the other vertical hole by pushing with an impact force while adding a rod through the vertical hole on the pushing side of the pipe. 2. A propulsion unit having an impact propulsion force, a pipe which is disposed downstream of the propulsion unit in the propulsion direction and abuts against the propulsion unit, and which is to be buried underground, and the axes of the propulsion unit are straight. A guide means for guiding the wire to be on a line, a rope connected to the propulsion device, a winch provided in the guide means for pulling the rope to apply a force downstream of the propulsion direction to the propulsion device, the pipe An earth-discharging member provided with a pressing body having an outer diameter slightly smaller than the inner diameter of the pipe, and an earth-discharging member and a propulsion device connected to the earth-discharging member so as to be extendable between them. An earth removing device for a buried pipe, wherein one end of the earth removing member and the other end of the rod are connected to the propulsion head of the propulsion device.