JPS60192087A - Embedded pipe propelling 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] This research is for the purpose of burying pipes for sewage, cables, etc. underground in the civil engineering project I, and is a method for promoting buried pipes as a small-diameter promotion method that can correct the holes. It relates to construction methods and equipment.

The small-diameter propulsion method is a propulsion method that uses steel pipes and humid pipes of 250φ to 1,000φ. Conventionally, when holes are formed during small-diameter propulsion, in order to correct this, a propulsion device as shown in Figure 1 is used. had not been used. In Figure 1, 1
i7J' outside/17s2 is an inner tube, the front side of the inner tube 2 is the screw shaft 2b, the tip side is the axle) head 2a, and the inclined head 2a has a center riser 2ee inside the outer tube 1.
This prevents the tip from wobbling. During normal excavation, both the outer pipe and the inner pipe are fed while rotating in opposite directions, but if a bend in the hole occurs, the rotation is stopped and the shaft is propelled as it is. In this case, the tilting head 2a is eccentrically corrected diagonally upward in the drawing, so that it is rotated and propelled again. The excavated soil passes between the outer pipe 1 and the inner pipe 2 and is discharged by the screw shaft 2b.

In addition to the method shown in Fig. 1, conventional buried pipe propulsion methods capable of repairing bent holes + 'E E'J include the OK mole method (TH propulsion method); This is a double pipe construction method that is propelled by a screw shaft.

According to this 2M↓ pipe construction method, the sand diameter that can be rolled out with an auger set inside the outer pipe is about 30 meters at most.
If the boulders are large, it will be impossible to discharge them with an auger.

The present invention has been made in view of the above-mentioned circumstances, and includes a bit having an inclined cutting surface at the tip and an inclined surface at the outer diameter portion of the tip, a sheath tube fixed by welding or the like, and sequentially extended and propelled. The sheath tube is rotated and propelled while sending jet water into the bit]
7. To provide a buried pipe propulsion method and its device, which is characterized in that when a hole bends, the deviation of a target such as a light emitting diode installed at the tip of the sheath pipe is measured and corrected using a transit or a laser theodolite at the rear of the polling machine. This will be explained in detail below based on the attached drawings. 2g2 diagram (a)
3 is a cross-sectional view of a bit showing an embodiment of the present invention, (B) is a longitudinal sectional view thereof, FIG. 3 is an explanatory diagram of the arrangement of the device of the present invention, and FIG.
Figures (A) to (E) are explanatory diagrams of the buried pipe propulsion method of the present invention.

The bit 3 of the present invention has an inclined cutting surface 3a at the tip that is inclined by α degrees with respect to the cross section, and one surface on the outer diameter part of the tip that is 0 degrees with respect to the axis.
A tip 3C of a carbide bit or the like is fixed at the tip.The bit 3 is fixed by welding or the like to the tip of the ψ white bone 4 of the steel pipe.

A water pipe 6 is connected to the nozzle 5 in the bit 3 and sends jet water, and is fixedly installed along the entire length of the cannula tube, and as shown in Fig. is connected to the water pump 11 with a hose 6a or the like.

In addition, a luminescent iode 8 (LE
D-2 type) is provided, and connected to the light emitting diode etc. 8, it is disposed and fixed over the entire length inside the measurement tube 7, 11, and threshold value 4. -8 Self-emitting diode, etc. is the 4th
As shown in the figure, it has two LED measurement points: a center target 8a and a planetary target 8b, and a third
As shown in the figure, a transit or laser 7 odolite 10 set behind the bowing machine 9 is used to locate the upper L1 target 8 [L18 b c2) 'FiA (S'l
'(l: tUllI L TE is set to be repaired as described below.

The device of the present invention is used in the West IM as shown in FIG. Transit or Hazard Theodolite 1 to watch the eccentricity of the targets 8a and 8b above the tt + i
0 is set. Inside the starting shaft 12 or starting shaft 12
A water supply pump 11 is installed near the water pump 11 to supply water from a water source or water notch (not shown) to the nozzle 5 at the light end through a hose 6a and a water pipe 6.

Figure 4 is a NI) clear diagram of an embodiment of the construction method of the present invention.
(a) Normal excavation: The sheath pipe (propulsion pipe) 4 is rotated clockwise or counterclockwise to propel the excavation while sending jet water from the water pipe 6. In this case, water is ejected from the nozzle 5 at the tip of the water pipe 6, so the earth and sand that has entered the sheath pipe 4 smoothly passes through the sheath pipe 4 and is discharged into the starting shaft 12, and the sheath pipe 4 is 1α 1. The position remains unchanged from the initial set position. That is, the planet 1 no target 8b is observed above the center target 8ω in the center.

(B) Occurrence of hole surface curling (upward)...The measurement is carried out by moving upwards as shown in the figure (B). Since the center target 8a is observed to have moved upward by t in the ta←te≠teitsu size image, it is necessary to correct the hole surface 9 downward.

(c)~0) Correcting the hole surface - Set it in the correcting direction (downward as shown in the figure), and move it forward while swinging left and right as shown in the figure.The inclined cutting surface of the bit 3 3a
The hole surface curvature is corrected downward by the action of the inclined surface 3b, and (e) the original direction as shown in the figure ((b) the same direction as shown)
Return to If the bend cannot be corrected with the above operations, send water from the water pipe: ii! 'If the swing propulsion is carried out with full reduction or stop, the inside of the tip tapered portion 3d will easily become clogged with earth and sand, so this can be corrected.

(e) When measuring in the illustrated state, the target is moved completely above the target (states (a) to (b)) and observed as described above.

In addition, in order to connect the sheath tubes 4 one after another, it is necessary to connect them by means such as welding so that the connecting portions do not loosen even when the sheath tubes 4 are swing-propelled.

As described above in detail, the present invention provides the following effects.

■ Since it does not rely on a double pipe with an auger set inside the outer pipe, it can be propelled even on sandy ground mixed with cobbles, including large-diameter gravel.

■ Since it is a single-tube type with sheath pipes connected by welding, it is a simple and inexpensive device with fewer failures.

■ Measurement of hole surface can be carried out by installing a measuring tube inside the sheath tube and a light emitting diode (LED), etc., so even if the sheath tube is clogged with earth and sand, measurements can be made reliably and , whenever you need it.

Sometimes you can figure out the direction of correction.

■ By combining swing drilling, rotary drilling, and the orientation of the inclined cutting surface at the tip of the bit, it is possible to perform hole correction drilling.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional eccentric buried pipe propulsion device, and FIG. 2 is a cross-sectional view of a bit showing an embodiment of the present invention.
(I) is a sectional view of the same introduction, Figure 3 is an explanatory diagram of the arrangement of the device of the present invention, and Figure 4 is an explanation of the buried pipe propulsion method of the present invention. Yes. I...outer tube, 2...inner tube, 3...bit, 3a...
・Incline cutting in, 3b...slanted surface, 3c...
・Chip, 3d--Deva part, 4--Sheath tube, 5
--Nosle, 6... Water supply bone, 6a --- Hose, 7
...6111 official, 8...light emitting diode, etc., 8a
... Center target, 8b -- Planeta patent applicant Mining 01 Drilling Industry Co., Ltd. Representative Patent attorney Hide Sato Akimi Seven Drawings

Claims (1)

[Claims] (11) A bit whose tip has an inclined cutting surface inclined with respect to the cross section and one side of the outer diameter part of the tip has an inclined surface inclined with respect to the axis is fixed to the sheath pipe by welding or the like. , While sending jet water from the water pipe to the nozzle opened in the bit, rotate and propel the sheath pipe with a poling machine. 1. Hole hole detection:
At the start of drilling, use a transit or laser theodolite set at the rear of the polling machine to observe the deviation of a target such as a light emitting diode set at the tip of the measuring tube, and when correcting a hole, use the inclined surface of the vj1 tip bit in the hole correction direction. A buried pipe propulsion construction method characterized in that the water is set in the water pipe and swing propulsion is carried out while sending jet water, and if this cannot correct the problem, the amount of water sent to the water pipe is completely reduced or stopped and swing propulsion is carried out. (2) Inclined tip of the sheath tube with respect to the cross section -tf
fl I! ill Tfrr f-4E m OIRn
'IsK tn L Thi -1+: lbh +
l゜, f % I 4 Wia It is fixed by Viratra welding etc. which is a sloped surface, and jet water is sprayed into the bit.
A nozzle for 11 was attached to the tip of the water pipe at the tip inside the sheath tube, the water tube was arranged over the entire length inside the sheath tube, a light emitting diode, etc. was attached to the tip inside the sheath tube, and it was connected to the light emitting diode, etc.
A buried pipe characterized in that a 411 fixed pipe is arranged over the entire length inside the sheath pipe, and the poles of all the sheath pipes connected by welding or the like are gradually attached, and both of the poles are arranged so that jet water is sent to the water pipe by a pump. Propulsion device.