JPS5811298A - Method and apparatus for embedding pipe according to non-opening drilling method - 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 provides a management installation method and apparatus using a trenchless construction method.
4 related to c, 11° Relatively small diameter (IGOOA or less) gas pipes, water pipes, etc. on roads with heavy traffic or in urban areas
A non-m1 construction method (conventional) is known for burying. The ζO construction method generally involves laying a bi-lodge pipe from the starting shaft to the destination shaft, and then advancing the buried pipe along the pilot pipe. There are several known methods of propulsion for underground pipes, but
Typical 140 types include the excavation type and the multi-stage consolidation type. The excavation type attaches a cutter head to the tip of the buried pipe, rotates the cutter head simultaneously, and launches the %5IWk pipe from the shaft side using an axial jack. Sequential press-in is 5KL, and this method is suitable for relatively vertical soils. However, according to this method, if the excavation distance becomes long, equipment such as propulsion jacks will become larger, and it will also become difficult to discharge the soil using the screw conveyor inserted into the pilot pipe.
There is a limit to the excavation distance.

The multi-stage consolidation method is a method in which a multi-stage consolidation head is set at the tip of a buried pipe, and the pilot pipe is pressed into the guide along with the jacking of the starting shaft, and is an effective method for soft ground. However, even with this method, as the excavation distance increases, underground resistance increases, and the jacking capacity must be increased, making long-distance excavation difficult in any case.

The present invention has been proposed as a result of examination in view of the above circumstances. After installing a pilot pipe in 41, the pipe body should be buried along this pilot pipe, depending on the soil quality. The object of the present invention is to provide a new method and device for installing a scissor tube over a long distance.

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. First, in the present invention, as shown in FIG. 1) Reaching from the shaft (2) i to the pilot pipe (3)
bury it. Next, in the present invention, this pilot pipe (3
) is attached to the tip of the excavation head (4).

Figure 4 shows the details of this drilling head (4).
This drilling head (4) consists of a hole expansion bit φ) and a short sheath pipe (6
) and these are swivel joints (7)
connected via.

This swivel joint (7) includes a boss (8) whose one end is fixed in the hole expanding bit (5), and a radial ball bearing that is provided in the housing (9) and pivotally supports the boss (8). nl car and taber roll bearing (6)
It is composed of (to) and〉.

The hole expanding bit (5) is attached to the housing (
9) indicates that it can be rotated.

Also, the above-mentioned hole expansion pit) (5) 0 previous IIaK#i, the above-mentioned Peitz) tube (3) toI&IEiia4$tii1
Leg 1k, solenoid connection part a◆, hole expansion bit (5) s
A water injection hole (2) leading to K is formed, and as shown in FIGS. 5 and 6, soil intake rows are formed in the vicinity of the bit (2) provided in the front m, respectively.

On the other hand, in Fig. 4, 4 is an earth discharge pipe) This discharge pipe 4 is inserted from the inside of the hole expanding bit (5) through the bush (2) and through the center of the hole in the boss (8). , sheath tube (6)
It extends to the rear of the The hole-expanding bit side of this discharge pipe (E) is bent downward, and the insertion port (2) faces in the opposite direction to the turning direction of the hole-expanding bit (5), as will be described later. Makyu Export (6) Confucian Exhaust Pipe - Ku in! ! A connecting pipe is connected to the first part), and a jet pump (not shown) is connected to the armpit connecting pipe.

Note that the upper INK of the sheath tube (6) is provided with an anti-friction agent spout.

In the present invention, such a drilling head (4) can be connected to 1M!
After installing the tip IiK of the pilot pipe (3) through (b), as shown in Figure 2E and Fuki 3,
)K! Installed excavation * (31) K Therefore, rotate the pilot pipe 0) and start standing @ (1) I
I K pull the turtle closer. With this, the swivel joint (
7), only the hole-expanding bit (5) is rotated and the hole is expanded and drilled in the horizontal direction. At the same time, in the present invention, the rear end of the sheath tOIO, which has been joined by welding and has a predetermined length, is pressed on the rear end of the short sheath pipe (6) with a jack (32), and a hole expansion pin (57K thrust is applied). In addition, in this example, as the hole expansion progresses, the jack (32) and the press ring (33) assist the stator.
) through space? (J4) is interposed.

On the other hand, in the present invention, the excavated earth is removed near the bit.
Insert hole expansion pin from Japan and Korea (S), PIQ
Water is supplied from the water injection hole (2) through the K pilot pipe (0), and the discharged soil becomes a slurry in the hole expansion bit (5). In addition, by operating the jet pump connected to the connecting pipe of the discharge pipe, negative pressure is applied to the distal end of the discharge pipe), and the slurry-like O waste is suctioned from the suction port and discharged. It passes through the earthen pipe and is discharged to the rear of the sheath pipe.

Furthermore, the antifriction agent is poured out from the antifriction agent spout onto the outer periphery of the tube, thereby reducing syslast.

As explained above, according to the present invention, after installing the pilot pipe at I#, when installing the pipe body along this pilot pipe, Attach it to the tip of the pipe) and start: Pull the KIIK and at the same time let the sheath expansion bit take the sheath pipe, and excavate and remove soil through the inside of the sheath pipe and
It is possible to excavate a long distance in one expansion process without using a large jack, etc., and without being affected by the soil quality. This is one of the most effective inventions, such as the one that allows the installation of a single tube body.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are schematic diagrams showing working conditions using the device according to the present invention, Figure 4 is a cross-sectional view of the device according to the present invention, and Figure S is the A-M arrow in Figure 4. l! 6 is a view taken along arrow II-B in FIG. S. In the figure, (1) is the starting shaft, (2) is the arrival shaft, (3) a-no (Iput pipe), (4) is the drilling head, (5) is the hole expansion pit, and (7) is the swivel shaft. α◆ is the connection part, -Hiro soil intake, ■ is the discharge pipe and % (2) is the suction port. Patent applicant Nippon Kokan Co., Ltd.

Claims (1)

[Claims] (1) From the starting shaft to the arrival shaft
Connect a hole-expanding bit to the end of this pilot pipe and a sheath pipe to the rear end of this hole-expanding bit in the newly installed 4% vertical shaft, and while rotating only the hole-expanding bit once through the pilot pipe. This method for installing a pipe by a non-trench method is characterized by drawing it into a starting shaft 11, letting the sheath pipe be taken by an axillary expansion bit when it is inside, and discharging the excavated soil to the outside through the inside of the sheath pipe. Q) Pie kit tube and OW on the front m part! The hole-expanding bit (K) is composed of a hole-expanding bit having a hole and a sheath pipe connected to the hole-expanding bit via a suiperuge l-in F.
It is characterized by forming a soil intake port and disposing a soil discharge pipe extending from the inside of the ζ0 expansion bit through the 0 shaft core portion to the sheath pipe opening. Management installation equipment using trenchless construction method.