JPS6059297A - Embedding pipe accelerating method and apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention can be used in civil engineering work to install underground pipes for sewage, cables, etc. This invention relates to a buried pipe propulsion method using a polling machine for burial and its device.

The conventional buried pipe propulsion method, which uses an auger shaft as an inner pipe inside an outer pipe, is used to bury small diameter pipes of about 400φ to i, oooφ. A polling machine (usually a power swivel type that can rotate and feed the inner and outer tubes) is installed on 3 f.
) to feed the outer tube 4a and inner tube 4b (ocher shaft) at the same time in reverse rotation to drill the pilot hole, connect the pilot tube 4 at (1)), and remove the enlarged bit 5 after reaching at (C). Opening, fdl, (el) to expand the hole, take the sheath pipe or humid pipe, and perform auxiliary propulsion with the jack 6 from the reach hole 2 side.However, if the buried pipe is about 400φ In some cases, the drilling hole is not necessary.[7] If a hole bends during drilling of the pilot hole, it cannot be corrected, so a raccoon-set drill propulsion device as shown in Figure 2 is used to correct it. In Fig. 2, 7 is an outer tube, and 8 is an inner tube.On the near side of the inner tube, the screw shaft 8b tip 4411 is a tilted head 8&, and the tilted head 8a has a center riser 8cf inside the outer tube. , hL prevents the tip from swinging out. During normal drilling, the outer tube 7 and inner tube 8 are rotated in opposite directions while feeding both, but if the hole bends, the rotation is stopped. If the excavated earth is fed as it is, the tilting rod 8a will be eccentrically corrected diagonally upward in the drawing in this figure, so it will be rotated and fed again. It is discharged to the starting shaft by the screw shaft 8b.However, when the hole bend correction using the conventional buried pipe propulsion device tube as shown in Fig. 2 is performed, when the ground to be excavated is a gravel layer mixed with cobbles, if the cobbles are thick, the cobbles Not only is it difficult to excavate unless excavation is done while crushing the waste, but it is also difficult to carry out construction due to the difficulty of discharging the water using a screw r. In many cases, the ground near the river is a gravel layer of cobblestones, and it is necessary to create a natural slope for the buried pipe, so repairing bent holes is a necessary condition. It could not be constructed using the construction method using the buried pipe propulsion device.

The present invention has been made in view of the above-mentioned circumstances, and a down-the-hole drill is attached to the tip of the auger shaft inside an outer tube that has an eccentric hole and a whipstock with a cutting tip fixed to the cutting portion of the tip. Insert the inner tube, and during normal excavation, reverse the inner tube and outer +F to each other, simultaneously fully feed both ICC, operate the down-the-hole drill, and excavate, and during eccentric excavation, use the eccentric hole f of the above-mentioned whipstock. The object of the present invention is to provide a buried pipe propulsion construction method and its device, which are characterized by the fact that the holes can be corrected by using the same method.

The following will be explained in detail based on FIG. 3 and subsequent figures.

The buried pipe propulsion device of the present invention has an eccentric hole as shown in FIG. (Left before (+l)
I) is an auger shaft 11a having spiral blades on the outer periphery of the shaft.
The inner tube 11 whose tip is a down-the-hole drill 9
It is inserted through. Figure 4 is a partially cutaway perspective view of a conventionally used down-the-hole drill, and Figure 5 (a
) is a perspective view of a town-the-hole drill used in the present invention (t14), but the structure of the down-the-hole drill 9 used in the present invention is as follows (differently) There is.

Conventionally used in Figure 4) 1. The internal structure of the 17-piece down-the-hole drill is the same as that of an air hammer used in civil engineering work, etc., with 15 being pulp for controlling air, 14 cylinder liners, 13 being a piston, and 12 being a drill hit. The supplied pressure air follows the valve 15 to move the piston 13 back and forth, and then passes through the hole at the tip of the drill pin 12, passes through the groove 12af on the outer periphery, and is discharged to the near side (+1111 to the left in the drawing). The piston 13 moves back and forth and hits the shank 12b of the Z) remover drill pit) 12 to apply an impact force.

The down-the-hole drill 91- used in the present invention shown in FIG. 5fa) is provided with a center riser 14a on the outer periphery of the cylinder liner 14 of the down-the-hole drill 17 shown in FIG.

)” ') 9 Fill with drill bit 16
(Drill pit for cutting soil and rocks) 16 Groove 1 on the outer periphery
The auger 'f passes through the gap between the outer tube 10 and the cylinder liner 14 (this gap is secured by the center riser 14a shown in FIG. 5 fa), as shown in FIG.
The helical blade of the nlllla is used to discharge the ball into the starting shaft (number 1 in Figure 21) in the direction of the ball cylinder machine. ) Drill bit 1 as shown
6 The excavated surface 16c at the tip is A5'l at right angles to the +ll1t center.
A large number of hard nuts 16b are implanted. In Fig. 5+bl, 16e is an air hole, 16d is an air hole;
However, when large boulders or rocks are crushed, the crushed powder and air exit the VCC.

g4.3 tnu1 (a) ~ (dl is the opening of the embodiment of the construction method of the present invention, or when jl is normally tl + 1, the starting shaft (
(See Figure 11.1) Using a polling machine with K. 16 (normally a power swivel quiff is used), rotate the inner tube 11 clockwise and the outer tube 0 counterclockwise as shown in al. Open the axis of the auger and supply pressure to the down-the-hole drill 9 that has been disassembled at the tip of the auger 11a of the pipe 11.
1, operate the down-the-hole drill 9 to strike with the drill bit 16, and fully feed the inner and outer tubes. In this case, the down-the-ball drill 9 is inserted through the eccentric hole of the whip stock [Ob] at the tip of the outer tube 10, but the whip stock 10b moves the eccentric hole axis C-D to the drilling axis E-D.
Since it rotates while changing the axis C-1, the drill pit (16) also rotates while changing the axis C-1 as shown in Fig. 3.
The hole is excavated while changing the diameter of -i, and the same outer diameter as the above-mentioned whip stock 10b is drilled. In the case of normal excavation shown in FIG. 3(a), the hole is drilled with the drill bit 16 of the Townser Hole Drill 9, and the tip 10a of the whip stock 10b at the tip of the outer tube 10 is not used.

[blade]] If the hole bends during drilling, in order to correct the axis of the eccentric hole of the whipstock 10b, move the center seam in the direction in which it should be eccentric (upward in Fig. 3), 1 (In a stationary state, operate the down-the-hole drill 9 to excavate eccentrically while rotating only the inner pipe 11, and stop the inner pipe 11 when a certain amount of eccentricity is reached.

The position of the whip stock lOb shown in FIG. After retreating (to the left in Figure th1), first perform eccentric drilling as shown in (C) and rotate and feed the outer pipe at the halfway point of the unsa hole drill 9. In this state, the whip stock 10b is drilling 17. The outer diameter of the drilling hole is
It is 17 times sharper than the above whip stock lOb outside.

Next, as shown in fdl, by feeding the outer tube 10 non-rotating to a state where normal excavation is performed, e) eccentricity 4- can be corrected, and the normal excavation is returned to after correction of degree. . In addition, when correcting hole bending shown in FIGS. 3(b) to 3(d), when rotating and feeding the down-the-hole drill 5) and the whip stock 101 in a stationary state, unlike the normal drilling described above, Excavation is performed using the tip loa.

As explained in detail above, according to the present invention, it is possible to correct hole bending with a simple structure, and even when large cobbles are scattered in a gravel layer mixed with cobbles, which was difficult in the past, it is possible to correct the hole bending. It is possible to bury it.

[Brief explanation of the drawing]

Figure 1 ial ~ (el is a conventional buried pipe) - explanatory diagram of the method,
Figure 2 is an explanation of the conventional eccentrically capable propulsion device (Fig.
Figure 3 (al~(dl is an explanatory diagram of an embodiment of the construction method of the present invention,
Fig. 4 is a partially cutaway perspective view of a conventionally used down-the-hole drill, Fig. 5 fa) is a perspective view of a down-the-hole drill used in the present invention, and fb) is a perspective view of a drill bit used in the down-the-hole drill. It is a diagram. 1... Starting shaft, 2... Arrival shaft, 3...
...Borlink machine, 4a, 7, lO...
Outer tube, 4 & 11... Inner 'F4.8b...
・Screw M, 8c, 14a---center riser, lOa---chip,], Ob---
- Whip stock, IJa... Auger shaft, 9... Down the hole drill, 14...
...Cylinder liner 12.16...1 drill bit, 16b...P-carbide tip 16c...
...Drilling surface patent applicant Koken Drilling Industry Co., Ltd.

Claims (1)

[Claims] (1) In the method of installing a buried pipe in the ground between the bore link 5 installed in the L-advance shaft and the reaching shaft, a whipstock with an eccentric hole and a cutting tip fixed to the cutting part at the tip is used. Insert the inner tube, which is a dowser hole drill with an auger shaft on the front side 1 and a center riser on the outer periphery of the cylinder liner, into the outer tube installed at the tip, operate the down-the-hole drill, and drill. When the hole is bent or on the hour, the whipstock's bias I [> Axis of the hole L, ? Expand! Because of E, the eccentricity is set in the 1-ideal direction, and with the outer tube stationary, the down-the-hole drill is operated while rotating the inward chisel to dig eccentrically, and the part outside the specified distance is also retreated without rotating. After that, first
uiif core drilling, bu v down the ball drill, rotate and feed the above outer tube halfway, then pc the outer tube is not rotated again and feeds in the state of ox to correct the hole bending. Characteristic underground pipe propulsion method. (2+ In addition to making an eccentric hole, the outer tube is equipped with a whipstock with a cutting tip fixed on the cutting part at the tip.The front side is the auger shaft, and the tip of the outer tube is attached to the outer circumference of the cylinder liner VC center riser. A down-the-hole drill provided is used to pass through the four pipes within the ward, a poling machine is used to rotate the inner and outer pipes in opposite directions, and both are fed, and the down-the-hole drill is used to strike the pipes. Buried pipe propulsion device with all features.