JPH0738466Y2 - Hume pipe for propulsion method - Google Patents

Description

[Detailed description of the device] [Contents] Outline Industrial field of use Conventional technology Problems to be solved by the device Means for solving the problem Action Example Effect of the device [Overview] Underground such as underground walkway, water and sewer Regarding the fume pipes that are used by adding multiple fume pipes for the propulsion method in the construction work of the structure, the lubricant can be evenly distributed around the outer periphery of the fume pipe during the construction work at the rear of the propulsion, and thus the propulsion speed. The purpose is to provide a fume pipe for a propulsion method with a simple structure that can not only speed up the work, but also can sufficiently cope with ground subsidence, uneven earth pressure, propulsion meandering, etc. In the drilled fume tube for propulsion method, a plurality of fume tubes for propulsion method 1 ... can be added together to propel the ground, and a plurality of fume tubes for propulsion method 1 ... At the uppermost position of the outer peripheral surface, two lubricant injection holes 2a and 2b are bored at intervals in the axial direction of the fume pipe 1 ... And the pouring ports of the holes 2a and 2b are vertically upward. A lubricant which is configured to face toward and which is communicated with the lubricant injection holes 2a, 2b at least at the position where the lubricant injection holes are formed on the distal end side and which is formed endlessly over the outer circumference of the fume tube 1 ... A flow channel 3 is provided, and the lubricant flow channel 3 is viewed from the tip side of the fume tube 1 ...
The rear side groove wall 4 is formed in an upward slope from the lower end portion 5 toward the upper end portion 6, and the lubricant flow groove 3 is made of steel except for the ring-shaped opening 11 on the rear side groove wall 4 side. A space 20 is formed between the cover member 12 and the bottom surface of the lubricant flowing groove 3 in the lubricant flowing groove 3 covered with the cover member 12.

[Industrial application] The present invention relates to a fume pipe used as a fume pipe for a propulsion method in the construction work of underground structures such as underground walkways and water and sewer systems.

[Prior Art] In the propulsion method, if the frictional resistance between the ground and the fume tube for the propulsion method becomes large, the fume tube may be damaged by the jack thrust and the propulsion cannot be performed.

Therefore, in order to reduce the frictional resistance between the ground and the Hume pipe,
It is generally practiced to provide a lubricant injection hole on the outer peripheral surface of the fume tube and inject the lubricant into the ground through the injection hole.

The quality of this lubricant injection work not only affects the propulsion speed, but also affects ground subsidence, uneven earth pressure, propulsion meandering, and the like.

Therefore, conventionally, increasing the number of the lubricant injection holes,
Alternatively, it is devised so that the lubricant can be evenly distributed around the outer surface of the fume tube by increasing the injection amount from the predetermined lubricant injection holes without increasing the number of lubricant injection holes. .

[Problems to be Solved by the Invention] However, increasing the number of lubricant injection holes or increasing the injection amount from a predetermined lubricant injection hole without increasing the number of lubricant injection holes It was extremely difficult to inject the lubricant evenly around the outer surface of the fume pipe in the work of injecting the lubricant.

The present invention was devised in view of these problems, and the lubricant can be evenly distributed around the outer surface of the fume pipe during the construction work by the propulsion method, and thus the propulsion speed can be increased. It is an object of the present invention to provide a fume pipe for a propulsion structure having a simple structure that can sufficiently cope with ground subsidence, uneven earth pressure, propulsive meandering, and the like.

[Means for Solving the Problems] The fume tube for propulsion method according to the present invention is a fume tube for propulsion method in which a lubricant injection hole is formed in the outer periphery, and a plurality of fume tubes for propulsion method 1 ... A plurality of fume pipes for propulsion method 1 ... which can be jointly propelled in the natural ground, at the uppermost position of the outer peripheral surface, and at two positions with a gap in the axial direction of the fume pipes 1 ... The injection holes 2a, 2b are bored, and the pouring outlets of the holes 2a, 2b are configured to go vertically upward, and at least at the tip end side of the lubricant injection hole drilling position, the lubricant injection hole 2a, The fume tube 1 is provided with a lubricant flowing groove 3 formed in an endless shape around the outer periphery of the fume tube 1, and the lubricant flowing groove 3 is seen from the tip side of the fume tube 1.
The rear side groove wall 4 is formed in an upward slope from the lower end portion 5 toward the upper end portion 6, and the lubricant flow groove 3 is made of steel except for the ring-shaped opening 11 on the rear side groove wall 4 side. A space 20 is formed between the cover member 12 and the bottom surface of the lubricant flowing groove 3 in the lubricant flowing groove 3 covered with the cover member 12.

[Operation] According to the fume pipe 1 for propulsion method according to the present invention, not only the front conduit but also a plurality of fume pipes 1 connected to the front conduit.
Also in ..., at the uppermost position of the outer peripheral surface thereof, two lubricant injection holes 2a and 2b are provided at intervals in the axial direction of the fume tube 1.

Further, at least the lubricant injection holes 2a and 2b at the tip end side of the fume pipe 1 are communicated with the lubricant injection holes 2a and 2b, and the lubricant is formed endlessly around the outer circumference of the fume pipe 1. The distribution groove 3 was provided.

Therefore, the lubricant 10 can be evenly distributed on the outer peripheral surface of the fume pipe 1, and the lubricant 10 effectively acts to reduce the frictional resistance between the ground and the fume pipe, thereby reducing the propulsion force. Not only can it be prevented, the propulsion speed can be further increased, and the effects of ground subsidence, uneven earth pressure, meandering of propulsion, etc. can be minimized, and a propulsion method as designed can be obtained.

[Embodiment] The present invention will be described below based on an embodiment shown in the drawings.

In the drawings, reference numeral 1 indicates a fume tube for a propulsion method.

And, as can be seen from FIG. 3, the fume tube 1.
.. is added to propel the ground.

Here, at the uppermost position of the outer peripheral surface of the fume tube 1 for propulsion method, two lubricant injection holes 2a, 2b are formed at intervals in the axial direction of the fume tube.

Further, as described above, the lubricant injection holes 2a and 2b are bored at the uppermost position on the outer peripheral surface of the fume tube 1 for propulsion method, and the pouring outlet of the bore (perforation direction of the bore) is vertically upward. It is configured to go in the direction.

Therefore, the lubricant poured from the lubricant injection holes 2a and 2b is poured upward from the uppermost position of the fume tube 1.

Further, at the drilling position of the lubricant injection hole 2a on the tip end side, there is provided a lubricant flow groove 3 communicating with the lubricant injection hole 2a and formed in an endless shape over the outer circumference of the fume tube 1. ing.

Here, the shape of the lubricant flow groove 3 will be described with reference to FIG. 2 of the drawings. The lubricant flow groove 3 is formed in a substantially concave shape, and when viewed from the tip of the fume tube 1, the lubricant flow groove 3 is formed. The rear groove wall 4 of the flow groove 3 is formed as an upward slope from the lower end 5 to the upper end 6.

In this embodiment, at the position where the lubricant injection hole 2a is formed on the distal end side, the lubricant injection groove 2a communicating with the lubricant injection hole 2a and formed in an endless shape over the outer circumference of the fume tube 1 is formed. However, the present invention is not limited to this, and the lubricant distribution groove 3 may be provided at the position where the lubricant injection hole 2b on the rear end side is formed.

In the above, the use state of the present invention will be described. The propulsion jack 8 set on the oscillation standing pile 7 sequentially pushes the fume pipes 1 ... into the natural ground 9 to construct a predetermined underground pipe line. However, in order to reduce the frictional resistance with the natural ground 9 when pushing the fume pipe 1 into the natural ground 9 and increase the speed of the propulsion force, the lubricant injection hole 2a,
The lubricant 10 is injected between the ground 9 and the fume tube 1 from 2b.

At this time, the lubricant 10 injected from the lubricant injection hole 2a on the tip side
Circulates inside the lubricant flow groove 3 which is discharged from the lubricant injection hole 2a and communicates with the lubricant injection hole 2a. It will be evenly injected between the surfaces.

Therefore, the lubricant 10 works effectively, does not reduce the propulsion speed of the fume tube 1 but speeds it up, and is not affected by ground subsidence or uneven earth pressure, and does not cause propulsion meandering or the like.

Further, in this embodiment, the lubricant injection holes 2a and 2b are formed not only in the tip conduit of the fume tube 1 but also in the additional fume tubes 1 ... While propelling.

Therefore, during propulsion, the lubricant 10 can be intensively injected not only in the vicinity of the front conduit, but also in the place where the ground resistance and the fume pipe have increased the friction resistance in the place where the ground subsidence, uneven earth pressure, meandering, etc. have occurred. .

As a result, the frictional resistance with the natural ground 9 can be further reduced, and the speed of the propulsion force can be further increased.

By the way, since the rear groove wall 4 of the lubricant flow groove 3 is formed as an upward slope from the lower end 5 toward the upper end 6, the resistance of the groove wall 4 in the propelling direction of the fume tube 1 is increased. It is supposed to be as little as possible.

Moreover, as the fume tube 1 advances, the lubricant 10 is easily left in the ground 9.

Further, as shown in FIG. 5, the lubricant flow groove 3 is covered with an annular cover member 12 on the rear side groove wall 4 side thereof, leaving a link-shaped opening 11.

Then, the cover member is provided in the coated lubricant flow groove 3.
A space 20 is formed between 12 and the bottom surface of the lubricant flow groove 3,
The lubricant 10 is accumulated in the space 20 so that the lubricant 10 can easily flow out further.

Here, this cover member 12 is attached by the cover member.
12 may be attached to the outer peripheral surface of the fume tube 1 in the vicinity of the lubricant flow groove 3 and fixed by a connecting material such as a screw or fixed by an adhesive.

When attaching the cover member 12, the fume tube 1
It is important that the outer peripheral surface of the cover member 12 and the outer peripheral surface of the cover member 12 be flush with each other.

In this way, if most of the lubricant flow groove 3 is covered with the space member 20 by the cover member 12, the ground 9 enters the lubricant flow groove 3 during the work, and this lubricant flow groove 3 It is possible to prevent the groove 3 from being filled, the lubricant 10 can be made to circulate the entire circumference of the flow groove 3, and the lubricant 10 can be spread to the rear side in the propelling direction of the fume tube 1. Therefore, there is an advantage that the frictional resistance with the natural ground 9 can be further reduced and the speed of the propulsion force can be further increased.

[Effects of the Invention] Thus, the present invention has the above-described configuration.

Further, in the case of the fume pipe for the propulsion method according to the present invention, by providing the lubricant distribution groove in an endless state and in a ring shape on the outer circumference of the fume pipe, even if the lubricant is injected from one lubricant injection hole, The lubricant will go around the entire fume tube.

If the lubricant covers the entire circumference of the fume tube, the frictional resistance between the fume tube and the ground can be significantly reduced.

This can reduce waste of the lubricant injection amount.

Furthermore, the propulsion speed can be increased, the daily advance amount can be increased, and the construction cost can be reduced.

In addition, the effective action of the lubricant can reduce the influence on the ground subsidence, uneven soil pressure, propulsion meandering, and the like.

Further, it is possible to enhance the adaptability to curve promotion.

In addition, the original push propulsion equipment can be downsized, and excessive equipment can be eliminated to reduce equipment costs.

Further, when the lubricant is injected, the lubricant can be surely circulated, so that it can effectively function against water stoppage and road subsidence.

Further, since the lubricant flow groove is covered by the annular cover member with a ring-shaped opening on the rear side groove wall side thereof so as to have a predetermined space portion, the ground material may be damaged during the work. It is possible to prevent the lubricant from entering the flow groove and filling the flow groove of the lubricant, and the lubricant can be made to go around the entire circumference of the flow groove. It is possible to further reduce the frictional resistance with the natural ground and further increase the speed of the propulsion force.

[Brief description of drawings]

1 is a perspective view showing a fume tube for a propulsion method with a cover member according to the present invention removed, FIG. 2 (A),
(B) is an enlarged view thereof, FIG. 3 is a schematic view showing an outline of the propulsion method, FIG. 4 is a perspective view showing a conventional fume tube for the propulsion method, and FIG. 5 is a partially enlarged schematic view of the present invention. . 1 …… Hume pipe 2a, 2b …… Sliding material injection hole 3 …… Sliding material circulation groove 4 …… Rear side groove wall 5 …… Rear side groove wall lower end portion 6 …… Rear side groove wall upper end portion 7 …… Starting up Pile 8 …… Jack for propulsion 9 …… Solid ground 10 …… Sliding material 11 …… Opening 12 …… Cover member 20 …… Space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Fujimura 7-8 Sakaemachi, Kashiwazaki City, Niigata Prefecture Fujimura Hume Tube Co., Ltd. (56) Bibliography 58-129987 (JP, U) 154092 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A fume pipe for a propulsion method having a lubricant injection hole formed on the outer periphery thereof, wherein a plurality of the fume pipes (1 ...) For a propulsion method are spliced to enable propulsion in a natural ground. At the uppermost position of the outer peripheral surface of the fume pipe (1 ...) for propulsion method, two lubricant injection holes (2a, 2b) are provided at intervals in the axial direction of the fume pipe (1 ...). The holes (2a, 2b) are formed so that the spouts of the holes (2a, 2b) are directed vertically upward, and at least the lubricant injection holes (2a, 2b) are formed at the tip side of the lubricant injection holes. Communication, fume tube (1 ...
・) A lubricant flow groove (3) formed in an endless shape is provided over the outer circumference, and the rear groove wall (4) of the lubricant flow groove (3) is seen from the tip side of the fume pipe (1 ...). A groove formed in an upward slope from the lower end portion (5) toward the upper end portion (6), and the lubricant flow groove (3) leaves a ring-shaped opening (11) on the rear side groove wall (4) side. And a space portion between the cover member (12) and the bottom surface of the lubricant flow groove (3) in the lubricant flow groove (3) covered with the steel cover member (12). Fume pipe for propulsion method, characterized in that