JP2001020664A - Hume pipe for pipe jacking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the frictional resistance of a ground and a Hume pipe for pipe jacking by concentrically discharging a skid towards the outer circumferential side of the bending of the pipe having a highest frictional-resistance value at a curve pipe-jacking position. SOLUTION: In the Hume pipe 1 for pipe jacking in which a joint collar 3 is fixed integrally to one joining section 14 at one end in the pipe-shaft direction while a spigot 16 is formed in the other joining section 15 at the other end, injection pipes 13 injecting a skid are arranged radially in the circumferential direction on the joint collar 3 side, and a pipe line body 2a in which a pipe member as an arcuate cylindrical body, in which supply ports are bored in a base in response to the injection pipes 13 while discharge openings are formed in a side face on the anti-pipe-jacking direction side, is connected in a ring shape slightly smaller than the outside diameter of a Hume pipe body 11, interposing a partition wall 4 is arranged at the positions of the injection pipes 13. A skid reservoir 6 shaven in an annular shape is formed adjacent to the pipe line body 2a on the discharge opening side, a partition plate 41 is arranged at the space of the partition wall 4 and the skid reservoir 6 is divided into the plurality, and the outer circumferential surface of the pipe line body 2a is covered with one side of a cylindrical cover having approximately the same outside diameter as the outside diameter of the Hume pipe body 11 and one side of the cover is welded while the other side of the cover is disposed in the upper section of the slid reservoir 6 in an eave shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion fume pipe used for a propulsion method for pushing a propulsion fume pipe into the ground in construction work of an underground structure.

[0002]

2. Description of the Related Art Conventionally, in the propulsion method, when the frictional resistance between the ground and the propulsion pipe increases, the pipe is damaged by the thrust of the jack and cannot be propelled. Therefore, in order to reduce the frictional resistance between the ground and the propulsion pipe, a lubricant injection hole is provided on the outer peripheral surface of the propulsion pipe, and the lubricant is injected from the injection hole toward the ground. The quality of work not only depends on the propulsion speed and distance, but also affects land subsidence, uneven earth pressure, meandering, etc., and the following measures have been taken. (1) A method in which the position of the injection hole is rotated and joined for each connection pipe, a lubricating material is injected from each of the injection holes, and the lubricating material spreads all around 360 ° (see FIG. 13). A method is used in which a plurality of injection holes are provided on the entire circumference, a lubricant is supplied from the plurality of injection holes, and the lubricant spreads over the entire circumference (see FIG. 14). There is also a method of (3) increasing the amount of lubricating material injected. (4) Furthermore, Japanese Utility Model Publication No. 7-38466 and Japanese Patent Publication No. 6-6055
There is also one described in Japanese Patent Publication No.

[0003]

However, the conventional technique has the following problems. In the case of the above (1), the arrangement position of the injection hole changes for each pipe to be joined,
At the time of construction, rotation work of the pipe is required, and it is necessary to inject a lubricating material from respective injection holes provided separately from each other, and there is a problem that the operation is troublesome. In the case of the above (2), in order to enhance the effect, a large number of injection holes are provided in the tube, but this has a problem that the strength of the tube is reduced. In addition, it is necessary to inject the lubricant from each of the injection holes that are arranged apart from each other, which is troublesome. In the case of (3), the amount of lubricant used increases and the cost increases. Further, since the lubricating material is injected in the same direction, there is a problem that the lubricating material does not cover the entire circumference. (4) In order to solve the above problem, the invention described in Japanese Utility Model Publication No. 7-38466 was used as an effective means. However,
In this invention, although the sliding material is discharged from the circulation groove on the outer periphery of the pipe, as the earth and sand flow back into the groove during propulsion, there is a possibility that the flow of the sliding material may be obstructed. Insufficient structure to discharge. In addition,
No. 60556 discloses that a covering member arranged on the same surface as the outer periphery of a fume pipe is provided with a through hole for allowing a lubricant to flow out in a lubricant flowing groove, and allows the lubricant to flow out from the through hole during propulsion. Then, the frictional resistance between the propulsion pipe and the ground was reduced to enable long-distance propulsion. However, when the pressure of the sliding material injected into the covering member was reduced, similar to the above-mentioned Japanese Utility Model Publication No. 7-38466,
At the time of propulsion, earth and sand may flow backward from the through hole to the covering member, obstructing the flow of the lubricating material, and the propulsion operation may not be smooth. Furthermore, in the case of curve propulsion, since the propulsion fume tube is propelled while bending up and down and right and left, the outer peripheral side of the propulsion fume tube bend always has a large frictional resistance value, and the lubricant is concentrated at that point. Could not be done.
As a result, there is a problem that the propulsion work of the predetermined reach distance cannot be performed. In order to solve the above problems, the present invention, when approaching a curve propulsion point during construction work by the propulsion method, concentrates the sliding material toward the outer peripheral side of the pipe bend having the highest frictional resistance value. Discharge to reduce the frictional resistance between the ground and the fume tube for propulsion, preventing an increase in propulsion,
The purpose of the present invention is to provide a fume tube for propulsion that can minimize the effects of land subsidence, uneven earth pressure, meandering propulsion, etc., and obtain a propulsion method as designed.

[0004]

According to a first aspect of the present invention, there is provided a fume tube for propulsion according to the present invention, wherein a joint collar 3 is integrally fixed to one joint 14 at one end in the axial direction of the tube. At the same time, in the propulsion fume tube 1 forming an insertion port 16 at the other joint 15 at the other end, the joint collar 3
On the side, an injection pipe 13 for injecting a lubricating material is radially arranged in the circumferential direction. At the position of the injection pipe 13, a supply port 22 is formed on the bottom surface corresponding to the injection pipe 13, and a non-propelled pipe is provided. A pipe body 2a formed by connecting an arc-shaped tubular member 2 having a discharge hole 21 on the side surface in the direction side to a ring shape with a diameter slightly smaller than the outer diameter of the fume tube main body 11 with a partition wall 4 interposed therebetween. Place the discharge hole
On the 21 side, adjacent to the pipe body 2a, a lubricating material pool 6 cut in an annular shape is formed, and a partition plate 41 is arranged at intervals of the partition walls 4 to divide the lubricating material reservoir 6 into a plurality of pieces. One side of a cylindrical cover 5 having an outer diameter substantially equal to the outer diameter of the fume tube main body 11 is coated and welded to the outer peripheral surface of the pipe body 2a.
Is characterized in that the other side is disposed in an eave-like shape above the lubricating material pool 6. Further, in the propulsion fume pipe according to the second aspect of the present invention, the lubricant reservoir 6 according to the first aspect communicates with the discharge hole 21 on the discharge hole 21 side of the pipe 2 between the adjacent partition walls 4. It is characterized in that a plurality of narrow recesses 61 are formed. Further, in the propulsion fume pipe according to the third aspect of the present invention, the injection pipes 13a to 13d of the first aspect are provided with branch pipe valves 72 to 75 connected to the main pipe 71 of the supply device 7 with the supply pipe 76. Opening and closing of the branch pipe valves 72 to 75 is performed by an electromagnetic valve that opens and closes electrically, so that the discharge amount of the lubricant from the lubricant reservoir 6 can be adjusted.

[0005]

The propulsion fume pipe 1 is provided with an injection pipe 13 extending from the inner surface of the propulsion fume pipe 1 to the pipe member 2.
After passing through the pipe member 2, the lubricant injected from the injection pipe 13 is filled in the lubricant pools 6 and 61, the upper portions of which are covered in eaves by the cover 5. Then, the lubricating material is accumulated in the lubricating material pool 6,6
1 is discharged outside the propulsion fume tube 1. Since the injection pipes 13 for supplying the lubricating material K are arranged radially in the plurality of divided pipe bodies 2a, the operation of injecting the lubricating material into the lubricating material injection pipe 13 is performed by a worker. It is formed at one position of the body 2a. During the propulsion operation of the propulsion fume tube 1, the valve inside the bend of the propulsion fume tube 1 is closed at the curve point, and the valve on the outer peripheral side of the bend of the tube having the highest frictional resistance is opened. Intensively discharge lubricant. Then, the lubricating material can be concentrated and discharged to a place where the frictional resistance value becomes highest corresponding to the bending of the pipe. In this valve opening / closing operation, an operator may directly perform the valve opening / closing operation, or may use an electromagnetic valve that opens and closes electrically.
In addition, since the upper part of the lubricating material pool is covered with an eaves-like cover, even if soil or the like enters the lubricating material reservoir, it is possible to avoid a situation where the discharge holes in the direction opposite to the propulsion direction are clogged, and the discharge of the lubricating material is obstructed. It can be performed smoothly without using.

[0006]

1 to 12 relate to an embodiment of the present invention. The first embodiment will be described with reference to FIGS. 1 to 6. In the propulsion fume tube 1 of the present invention, the joint collar 3 is integrally fixed to one joint 14 at one end in the axial direction of the tube and the other end of the other end. An insertion port 16 is formed in the joint 15. On the joint collar 3 side, near the joint collar 3, an injection pipe 13 for injecting a lubricating material is radially arranged in a circumferential direction. The position of the injection pipe 13 is
The fume pipe main body is formed by interposing the arc-shaped tubular member 2 having the supply port 22 formed on the bottom surface corresponding to 3 and the discharge hole 21 on the side surface on the non-propulsion direction side with the partition wall 4 interposed therebetween. A pipe body 2a connected in a ring shape slightly smaller in diameter than the outer diameter of 11 is arranged. Further, a lubricating material pool 6 cut in an annular shape is formed adjacent to the pipe body 2a on the discharge hole 21 side, and partition plates 41 are arranged at intervals of the partition walls 4 to divide the lubricating material reservoir 6 into a plurality. Split,
One side of a cylindrical cover 5 having an outer diameter substantially equal to the outer diameter of the fume tube main body 11 is coated and welded to the outer peripheral surface of the pipe body 2a, and the other side of the cover 5 It is characterized by being arranged in an eaves shape on the upper part. On the other end side of the injection pipe 13, a hole 14 communicating with the inside of the fume tube main body 11 is formed. After the lubricant is injected, the hole 14 is closed with a sealing member (not shown) having the same shape as the hole 14. Alternatively, it is closed by injecting mortar (not shown). 7 and 8 showing the second embodiment without providing the lubricating material reservoir 6 in an annularly continuous shape.
As shown in the figure, the discharge hole of the pipe 2 between the adjacent partition walls 4
A plurality of narrow recesses 61 communicating with the discharge holes 21 may be formed on the 21 side. Further, as shown in FIGS. 9 to 12, branch valves 72 to 75 connected to the main pipe 71 of the supply device 7 are connected to the plurality of injection pipes 13a to 13d via the supply pipe 76, and Opening and closing of the valves 72 to 75 is performed by an electromagnetic valve that opens and closes electrically, so that the amount of the sliding material discharged from the sliding material reservoir 6 can be adjusted. At the curve point, the valve inside the bend of the pipe is closed, and the valve on the outer peripheral side of the bend of the pipe having the highest frictional resistance is opened to discharge the lubricant intensively. In this way, it is possible to supply the lubricating material in a concentrated manner at the point where the frictional resistance value becomes highest corresponding to the bending of the pipe. For the valve opening / closing operation, a worker may directly perform the valve opening / closing operation, or may use an electromagnetic valve that opens and closes electrically. Further, in order to facilitate the propulsion operation of the propulsion fume tube 1, the propulsion fume tube according to the present invention is provided at an appropriate position in the propulsion fume tube row having no lubricating material discharge structure in accordance with the propulsion extension and the size of the curve. May be appropriately mixed and arranged.

[0007]

Since the present invention is configured as described above, the following effects can be obtained. (1) The outer peripheral side of the bending of the propulsion fume tube constantly has a large frictional resistance, so that the lubricating material can be discharged intensively at that portion, so that long-distance propulsion can be performed with the designed thrust. Therefore, no excessive force acts on the propulsion fume tube, so that there is no breakage, breakage, breakage, or the like of the body. (2) Since the cover covers the upper part of the lubricating material pool like an eave, even if soil etc. enters the lubricating material reservoir during backfilling, it will not block the discharge hole in the direction opposite to the propulsion direction at all. . Therefore, since the lubricating material can be smoothly discharged out of the pipe through the discharge hole, no excessive force acts on the propulsion pipe. (3) Since the lubrication material injection hole is located at one location of the pipeline, the worker can perform the injection work at one location of the pipeline. . Therefore, the lubricating material injection operation can be performed efficiently. Also,
When it is necessary to inject lubricant into each part of the lubricant filler pipe, the valve can be opened and closed more efficiently by using a solenoid valve that opens and closes electrically to regulate the amount of lubricant discharged. Lubricant injection work can be performed.

[Brief description of the drawings]

FIG. 1 is a front view of a propulsion fume tube of the present invention.

FIG. 2 is an AA end view of the present invention.

FIG. 3 is a sectional view taken along line BB of the present invention.

FIG. 4 is a front view around the partition wall of the present invention.

FIG. 5 is a cross-sectional view taken along the line CC of a partition wall according to the present invention.

FIG. 6 is a cross-sectional view taken along the line DD of the periphery of the partition wall of the present invention.

FIG. 7 is a front view of a propulsion fume tube according to a second embodiment of the present invention.

FIG. 8 is an EE sectional view of the propulsion fume tube of the present invention.

FIG. 9 is a mounting state diagram of the lubricating material supply device of the present invention.

FIG. 10 is a propulsion state diagram.

FIG. 11 is a view showing a state in which the sliding material is discharged when the branch pipe valve on the curve side is opened.

FIG. 12 is an explanatory diagram of a lubricant supply device.

FIG. 13 is an explanatory diagram of a conventional example.

FIG. 14 is an explanatory view of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Propulsion fume pipe 11 Fume pipe main body 12 Injection hole 13, 13a, 13b, 13c, 13d Injection pipe 14 Injection hole entrance 2 Pipe line 2a Pipe body 21 Drain hole 22 Supply port 3 Joint collar 4 Partition wall 5 Cover 6, Slip material pool 61 Recess 7 Slip material supply device 71 Main pipe 72, 73, 74, 75 Branch pipe valve 76 Supply pipe K Slip material

Claims (3)

[Claims] 1. A joint collar 3 is integrally fixed to one joint 14 at one end in the pipe axial direction, and the other joint at the other end.
In the propulsion fume pipe 1 which forms an insertion port 16 at 15, an injection pipe 13 for injecting a lubricating material is radially arranged on the joint collar 3 side in a circumferential direction. ,
A supply port 22 is drilled on the bottom surface corresponding to the injection pipe 13 and an arc-shaped tubular member 2 having a discharge hole 21 on a side surface on the non-propelling direction side is interposed with a partition wall 4 therebetween. Fume tube body
Pipe body 2a connected in a ring shape slightly smaller in diameter than the outer diameter of 11
Is formed adjacent to the pipe body 2a on the discharge hole 21 side, and a lubricating material pool 6 cut in an annular shape is formed, and a partition plate 41 is disposed at intervals of the partition walls 4 to form the lubricating material reservoir 6. It is divided into a plurality of parts, and one side of a cylindrical cover 5 having substantially the same outer diameter as the outer diameter of the fume tube main body 11 is coated and welded to the outer peripheral surface of the pipe body 2a, and the other side of the cover 5 is A propulsion fume tube characterized by being disposed in an eaves-like manner above a lubricating material reservoir 6. 2. The lubricant pool 6 includes a plurality of narrow recesses 61 communicating with the discharge holes 21 on the discharge hole 21 side of the pipe 2 between adjacent partition walls 4. Item 3. A propulsion fume tube according to item 1. 3. Branch pipe valves 72 to 75 connected to the main pipe 71 of the supply device 7 are connected to the injection pipes 13a to 13d via a supply pipe 76, and the opening and closing of the branch pipe valves 72 to 75 are performed electrically. The propulsion fume tube according to claim 1, wherein the amount of the sliding material discharged from the sliding material reservoir (6) can be adjusted by a solenoid valve that opens and closes in a controlled manner.