JP2001271591A - Multi-function pipe for jacking and joint for multi- function pipe for jacking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-function pipe for jacking and its joint suited to lay a pipeline including an auxiliary pipe for realizing the multi-functional use. SOLUTION: This multi-function pipe 11 for jacking has a double pipe consisting of a main pipe 12 and an armoring pipe 13 as a basic construction, an auxiliary pipe 14 is arranged between the main pipe 12 and the armoring pipe 13, as a filler 15 around the pipe, a mortar layer 15a is formed, the auxiliary pipe 14 is arranged simply, definitely and as one united body. In this way, the multi-function pipe 11c for jacking is jointed by inserting a socket 21 for the posterior multi-function pipe 11c for propulsion to the socket 21 of the anterior multi-function pipe 1c for propulsion without using welding for jointing on the job site, at the same time, the auxiliary pipe 14 is jointed and a pipeline including the auxiliary pipe is installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multifunctional pipe for propulsion and a multifunctional pipe joint for propulsion used in a propulsion method for joining a main pipe to a preceding main pipe.

[0002]

2. Description of the Related Art Hitherto, the following are mainly known as propulsion methods, and a propulsion pipe and a propulsion pipe joint suitable for each method have been developed.

(A) Propulsion method using a sheath tube: A fume tube or a steel tube having a diameter larger than the main tube is used, and after the sheath tube has been completely pushed, the main tube is inserted or pulled in to continuously connect the main tube. This is a propulsion method based on two-stage construction in which welding and joining are performed jointly. Mortar or the like is filled between the main pipe and the sheath pipe by local injection.

(B) Propulsion method using cast iron pipe for propulsion: One pipe end of the main pipe serves as a receiving port, a joint part such as a rubber ring or a press ring is built in the inner surface, and the other pipe end is connected with a plug. This is a propulsion method in which the front and rear pipes in the propulsion direction are fitted as mouths. The outer surface other than the joint is covered with reinforced concrete, and a steel flange for receiving pressure against the propulsion load is disposed at the end.

(C) Propulsion method using a steel pipe for propulsion: A double steel pipe in which a steel pipe larger in diameter than the main pipe is used as a sheath pipe and integrated.
Both ends of the main pipe are exposed in advance from the sheath pipe, a material filled with a material such as mortar between the main pipe and the sheath pipe is manufactured, and the main pipes exposed from the sheath pipe are welded to each other in the starting shaft. In this method, an exposed portion including a welded portion is coated with an anticorrosion coating and the like and then propelled. In this method, welding and propulsion are alternately repeated in a starting shaft.

On the other hand, in a pipeline laid by a propulsion method using a propulsion pipe and a propulsion pipe joint, for example, an auxiliary pipe such as a cable pipe for transmitting power and information for operation control and maintenance. Laying is being done.

As an example, the laying of a pipeline including a cable pipe by the propulsion method (a) will be described with reference to FIGS. FIG. 16 is a diagram showing an example of propulsion construction of a sheath tube, FIG. 17 is a diagram showing an example of propulsion construction of a main tube in a sheath tube, and FIG. 18 is an example of propulsion construction of an auxiliary tube in a sheath tube. FIG. 19 is a cross-sectional view taken along line AA of FIG.

[0008] As shown in FIG.
In addition, a starting shaft 2 and a reaching shaft 3 are provided. Starting shaft 2
A sheath pipe 4 is drawn in and laid to the middle of the planned pipe line 5 between the shaft 3 and the reaching shaft 3 by propulsion construction.

During the propulsion work, the single-sheath tube 4a is suspended in the starting shaft 2 by a hoist crane (not shown) or the like and placed horizontally at a predetermined position. Then, the single sheath tube 4 a is propelled along the predetermined pipeline 5 by the hydraulic jack 6.

[0010] A leading pipe 7 is joined to the front of the sheath pipe 4, and a predetermined pipeline 5 is excavated by an excavator mounted on the tip of the leading pipe 7 to lay the pipeline. The sheath tube 4 uses a fume tube or a steel tube having a larger diameter than the main tube.

As shown in FIG. 17, after the pushing of the sheath tube 4 is completed, the main tube single tube 8a is inserted or pulled into the sheath tube 4 to continuously weld and join the main tube single tube 8a. 8 is temporarily provided.

As shown in FIG. 18, after the pushing of the main pipe is completed, the auxiliary pipe single pipe 10a is inserted or pulled into the sheath pipe 4 to continuously weld and join the auxiliary pipe single pipe 10a. The pipe 10 is laid. Generally, a plurality of auxiliary pipes 10 are temporarily provided.

After laying the main tube 8 and the auxiliary tube 10 in the tube, the sheath tube 4 is filled with a filler material 9 such as mortar between the sheath tube 4, the main tube 8 and the auxiliary tube 10, as shown in FIG. To complete the construction. The pipeline retains strength by filling with the filler material 9 to ensure earthquake resistance.

[0014]

However, the pipeline laid by the above-mentioned propulsion method (a), (b), and (c) is generally provided separately from the main pipe, such as an auxiliary pipe such as a cable pipe. It is laid independently and has problems in terms of construction methods and costs. Further, the strength of the joint for joining the main pipes has not yet been satisfied.

[0015] The propulsion method using the sheath pipe of (a) is a two-step construction method in which the main pipe is drawn in and joined after the completion of the propulsion of the sheath pipe, and a step of locally injecting a filler between the main pipe and the sheath pipe. Need to be included, the construction period becomes very long and the construction cost increases. When laying an auxiliary pipe such as a cable pipe on this,
Furthermore, a sheath tube with a sufficiently large diameter is adopted for the main tube, and an auxiliary pipe is temporarily installed between the inner surface of the sheath tube and the outer surface of the main tube on site.
Thereafter, the whole must be integrated by filling with mortar or the like. Therefore, the size of the propulsion pipe becomes large, and there are many on-site work processes such as filling a filler such as mortar on the site. Therefore, there are many practical problems in terms of construction quality, construction period, and construction cost.

The propulsion method using a cast iron pipe for propulsion in (b)
Deformation concentration at the joint at the time of propulsion causes a decrease in the reliability of sealing of the rubber ring, and since it is a mere insertion joint, poor control of the direction of propulsion due to insufficient bending stiffness has a large effect on construction efficiency. Therefore, it is difficult to arrange an auxiliary pipe such as a dedicated cable pipe at or near the pipe.
Particularly, in the cast iron pipe for propulsion, since the outer diameter of the propulsion pipe is set according to the outermost diameter of the joint part which becomes extremely thick, it is difficult to provide an auxiliary pipe for multifunctionalization in the pipe body. .

In the case where the mortar layer is disposed on the exterior mortar layer, the strength of the cast iron pipe is lost, for example, the thickness of the entire propulsion pipe becomes larger, and if the exterior pipe is not used, the strength of the thickened mortar layer cannot be secured.

Further, since the joint portion after the construction is in a propelled state, the joint portion has lower strength and rigidity than the pipe body and is a starting point of damage damage such as breakage against displacement of the surrounding ground due to a large-scale earthquake or the like. And it is difficult to secure high reliability as a pipeline system. In addition, uneven deformation and aging deterioration due to the construction of the rubber ring, and further, sliding deterioration of the rubber ring due to repeated seismic loads are remarkable, and the water stoppage durability may be extremely low.

In the method (c) using a steel pipe for propulsion, a double steel pipe in which a steel pipe having a diameter larger than the main pipe is used as a sheath pipe is applied, and the on-site joining is butt welding, which is expensive as a pipeline system. Although reliability can be ensured, it is difficult to provide a multifunctional auxiliary pipe in the pipe with the structure as it is. Therefore, it cannot be applied to a pipeline that requires laying an auxiliary pipe such as a cable pipe for transmitting power and information.

The present invention has been made to solve the above problems, and when laying a pipeline including an auxiliary pipe for realizing a multi-function by a propulsion method, shortening the entire construction period, To provide a multifunctional pipe for propulsion and a multifunctional pipe joint for propulsion capable of facilitating construction, laying an auxiliary pipe at the same time as the main pipe, and further maintaining the strength of a joint for joining the main pipes more than the main pipe. With the goal.

[0021]

Means for Solving the Problems The invention of claim 1 of the present application is
A propulsion pipe used in a propulsion method of connecting main pipes to each other and laying a pipeline, wherein the propulsion pipe has a basic structure of a double pipe consisting of a main pipe and an outer pipe, and is provided between the main pipe and the outer pipe. This is a multifunctional propulsion pipe characterized in that an auxiliary pipe is integrally disposed in the propulsion pipe.

According to the multifunctional propulsion pipe of the present invention, the propulsion pipe has a basic structure of a double pipe consisting of a main pipe and an outer pipe, and an auxiliary pipe is integrally disposed between the main pipe and the outer pipe. Therefore, in the pipeline where the propulsion pipe is laid by the propulsion method, for example, a plurality of cable pipes used for transmitting power and information for operation control and maintenance are used as auxiliary pipes, and It can be joined at the same time by pressurizing the jack for use.

When the multifunctional pipe for propulsion according to the present invention is joined by propulsion construction, a pipe provided with a groove for inner surface welding or a groove for outer surface welding at an end of the main pipe may be used to connect adjacent main pipes. Butt welding can be performed to form an integrated structure as a weld joint.

Further, the main pipe having a spigot at one end and a receiving port at the other end as a joint is provided with a receiving propulsion multifunctional pipe adjacent to a receiving propulsion multifunctional pipe at a receiving joint. The spigot joint of the functional pipe can be press-fitted and inserted by a propulsion jack or the like to form an integrated structure as a press-fitting joint.

Further, after fitting and insertion, the main pipes can be butt-welded on the inner surface by a receiving ring joint and a spigot ring joint to form an integrated structure.

As described above, since the main pipe after construction has an integral structure as a joint having sufficient strength, the basic structure is a double pipe consisting of the main pipe and the outer pipe, and The multifunctional pipe for propulsion of the present invention in which the auxiliary pipe is integrally disposed between the pipes provides high reliability and safety required for laying a pipeline by propulsion construction. That is, the static strength (tensile, compressive,
(E.g., bending strength) is equivalent to or higher than the pipe, low cycle fatigue strength is equal to or higher than the pipe, and buckling (compression and bending) is equal to or higher than the pipe. Pipes are provided for seismic ground motion (repeated ground strain, slip) and ground deformation (buoyancy due to liquefaction, lateral flow, fault displacement), which are forms of load input acting on buried pipes during large-scale earthquakes. Can have the performance to do.

For example, a steel pipe has a fracture ductility of about 30% and a uniform elongation at which a maximum load is generated is also about 15%. Therefore, if the joint strength is equal to or higher than the pipe body, a large displacement can be absorbed in the entire pipe line. .

Therefore, the joint portion is not deformed or destroyed by a large displacement load such as tension, compression and bending acting on the pipeline, and the sealing property is maintained.
ADVANTAGE OF THE INVENTION According to this invention, the ductile strength of the material which a pipe body part has as a whole pipe system including a joint part can be fully exhibited. The auxiliary pipe to be attached is also integrated with the main pipe,
Piping is performed at the same time as main pipe joining.

According to a second aspect of the present invention, in the first aspect of the present invention, an auxiliary pipe is integrally disposed between the main pipe and the outer pipe via a filler. By filling a filler such as mortar, the auxiliary pipe can be simply and reliably arranged integrally.

Therefore, the multifunctional pipe for propulsion according to the present invention has sufficient pipe strength and pipe rigidity against propulsion load and external force after construction when laying a pipe by the propulsion method.
High reliability is ensured, construction efficiency is improved, and functions such as protection of the main pipe having a double pipe basic structure can be sufficiently exhibited.

According to a third aspect of the present invention, in the first or second aspect, the main pipe is provided with a spigot at one end and a socket at the other end as a joint. Is what you do.

The main pipe used in the present invention is a joint having a spigot and a receptacle formed by processing the end of the main pipe itself, and being welded to the tip of the main pipe or having the same material or a different material as the main pipe. A spigot ring and a spigot ring are provided on the outer surface of the end of the main pipe.
Includes one provided with a receiving ring on the inner surface of the end. The spout ring and the spout ring can be made of the same material as the main pipe or of a different material. These joints are previously provided integrally with the main pipe by welding or the like off-line. Therefore, it is possible to secure strength enough to withstand propulsion work, it is easy to press-fit with a propulsion jack or the like, and it is possible to secure high reliability and high sealing performance.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the receiving port has a tapered surface formed on an inner surface, and saw-tooth-shaped projections formed in the circumferential direction of the tapered surface are spaced apart in the axial direction. The spigot is formed with a tapered surface on the outer surface, and a plurality of saw blade-shaped protrusions formed in the circumferential direction of the tapered surface are provided at intervals in the axial direction. After the spigot of the other main pipe is fitted into the spigot of the pipe, the spigot and spigot of the spigot are engaged with each other and remain.

According to the present invention, it is possible to firmly press-fit with a propulsion jack or the like, and furthermore, after press-fitting and joining, the projections of the spigot and the receptacle are made to mesh with each other and remain, so that they can be pulled out. And sealability can be improved.

According to a fifth aspect of the present invention, in the third or fourth aspect, the spigot or socket is made of a shape memory alloy.

According to the present invention, since the spigot or the receiving port is made of a shape memory alloy, the function of the shape memory alloy can be sufficiently exhibited, the connection can be made firmly, and the sealing property can be further enhanced.

According to a sixth aspect of the present invention, in the third, fourth and fifth aspects of the invention, the spigot comprises a spigot ring and the receptacle comprises a receptacle ring. According to the present invention, when the trailing propulsion pipe is joined and propelled to the leading propulsion pipe, the spout ring of the trailing propulsion pipe is press-fitted into the receiving ring of the preceding propulsion pipe by a propulsion jack or the like. The joint can be reinforced and propelled by the ring.

Therefore, the joint is reinforced at least to the same extent as the main pipe, and the bending rigidity is secured, so that this propulsion pipe is applied to the propulsion method to carry out the same joining and propulsion work described above. A pipe line can be formed in the propulsion pipe to be repeated in sequence without reducing the controllability of the direction of propulsion.

According to a seventh aspect of the present invention, there is provided a multi-purpose propulsion pipe joint for joining the multi-function propulsion pipe according to the first or second aspect of the present invention, wherein the main pipe of the adjacent multi-function propulsion pipe is provided. The joint between the pipes is inner groove welding, and a heat insulating layer is formed so that a spacer pipe composed of a short outer pipe, a short auxiliary pipe, and a filler filling therebetween is covered with the inner groove welding portion of the main pipes. It is attached via a backing, and the short outer tube and the short auxiliary tube of the spacer tube are joined to the outer tube and the auxiliary tube of the multifunctional propulsion tube.

According to the present invention, the spacer pipe is attached via the heat insulating layer backing so as to cover the back side of the inner groove welding portion between the main pipes of the adjacent multi-functional propulsion pipes. Since the short auxiliary pipe is joined to the outer pipe and the auxiliary pipe of the multifunctional propulsion pipe, it is easy to join the adjacent propulsion pipe on site.

According to an eighth aspect of the present invention, there is provided a multi-purpose propulsion pipe joint for joining the multi-function propulsion pipes according to the first or second aspect of the present invention, wherein the propulsion multi-function pipe is connected to a propulsion multi-function pipe. The joining of the pipes is outer groove welding, and a spacer pipe made of a short armored pipe, a short auxiliary pipe, and a filler filling the space therebetween is attached so as to cover the outer groove welding, The outer pipe and the short auxiliary pipe are joined to the outer pipe and the auxiliary pipe of the propulsion pipe.

According to the present invention, the spacer pipe is attached so as to cover the outer groove welding portion between the main pipes of the adjacent propulsion pipes, and the short outer pipe and the short auxiliary pipe of the spacer pipe are combined with each other. Since the outer pipe and the auxiliary pipe are connected to each other, it is easy to connect the adjacent multi-functional propulsion pipe on site.

According to a ninth aspect of the present invention, there is provided a multi-function propulsion pipe joint for joining a multi-function propulsion pipe according to the third, fourth, fifth or sixth aspect of the present invention, wherein A stuffing box is provided on at least one side of the contact portion between the spigot joint and the receiving joint, and a seal rubber ring is disposed therein.

The contact portion between the adjacent spout joint and the receiving joint is more reliably sealed by the arrangement of the seal rubber ring. The dimensions are set so that the compression ratio of the seal rubber ring is 10 to 50%.

An invention according to claim 10 of the present application is a multi-functional propulsion pipe joint for joining the multi-function propulsion pipe according to claim 3, 4, 5, or 6; Characterized in that a water-absorbing swelling rubber is arranged at the contact portion of the slab.
ADVANTAGE OF THE INVENTION According to this invention, in the ground with a high groundwater level, the high sealing property with respect to earth and sand and infiltration water at the time of propulsion can be ensured by the high contact surface pressure of expanded rubber.

According to an eleventh aspect of the present invention, there is provided a multifunctional propulsion pipe joint for joining a multifunctional propulsion pipe according to the third, fourth, fifth or sixth aspect of the present invention, wherein The joint between the joint and the receiving joint is joined by one or more of press fitting, shrink fitting, cold fitting, and bonding.

According to the present invention, the spigot joint and the socket joint can be firmly joined by one or more of the means of press-fitting, shrink fitting, cold fitting, and adhesion, and the sealing property can be further enhanced. Therefore, it can be joined by a wide range of means and is practically convenient.

[0048]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a multi-purpose propulsion pipe is used as a propulsion pipe used in a propulsion method in which main pipes are joined to each other to form a pipeline. In general, the construction method using the propulsion method involves the installation of a starting shaft and a reaching shaft on the ground, and press-fitting a sewer buried from the starting shaft to the reaching shaft, and the propulsion pipe buried by jack pressurization first. It is pushed while excavating with the conduit. The joining of the leading propulsion pipe and the trailing propulsion pipe is performed in the starting shaft, and after the joining, the pipe is propelled by jack pressurization. The above-mentioned joining and propelling operations are sequentially repeated for the propulsion pipes that follow, thereby forming pipes. In general, dedicated pipes for water and sewage, gas, oil, telegraph and telephone, electric power, and the like are provided in the pipes.

It is known that, by the above-described propulsion method using a sheath pipe, a pipe is formed by combining these dedicated pipes in one pipe, but the dedicated pipes are independent of each other, Pipes are sequentially propelled. Therefore, in order to facilitate insertion or retraction of the jack for propulsion or the like by pressurization during propulsion, the sheath tube is made larger than necessary.
In addition, after the construction,
In order to maintain the strength, the gap between the sheath tube and the dedicated tube is filled with a filler such as mortar and integrated. However, the filling of mortar etc. is an on-site work.

Therefore, in the present invention, the propulsion pipe is used as a multi-functional propulsion pipe, the basic structure is a double pipe consisting of a main pipe and an outer pipe, and a special pipe that can be combined with the main pipe as an auxiliary pipe is a mortar. Filling materials such as etc. are integrated and arranged, and when applied to the propulsion method, the main pipe and the auxiliary pipe can be jointed at the same time, eliminating the work of filling materials on-site, the propulsion multifunctional pipe itself It is compact.

FIG. 1 is a partially cutaway side view showing an example of an embodiment of a propulsion pipe according to the present invention, and FIG. 2 is a sectional view taken along line BB of FIG.
It is sectional drawing by a line arrow. The multifunctional pipe for propulsion according to the present invention has a basic structure of a double pipe composed of a main pipe and an outer pipe, and has a multifunctional pipe as an auxiliary pipe. Here, a case where a steel pipe is used for the multifunctional pipe for propulsion will be described in detail.

In FIG. 1 and FIG.
a has a double pipe consisting of a main pipe 12 and an outer pipe 13 as a basic structure, and an auxiliary pipe 14 is arranged between the main pipe 12 and the outer pipe 13;
Around this is filled a filler 15 and arranged integrally. Using mortar as the filler 15, the mortar layer 1
5a is formed, and the auxiliary pipe 14 is simply and reliably integrated.

The propulsion multifunctional pipe 11a is a pipe applied when laying a pipeline in the ground by the propulsion method, and the propulsion multifunctional pipe 11a is configured as described above.
Dedicated pipes for water and sewage, gas, oil, telegraph and telephone, electric power, etc. applied to pipes can be properly combined with one multifunctional propulsion pipe 11 and integrally handled.

A steel pipe is used for the multifunctional pipe 11a for propulsion. In addition to steel pipes, other metal pipes, composite material pipes, composite structure pipes, and resin pipes can be used. Usually, the pipe diameter (for example, φ900 to 2000)
mm) is used.

The main pipe 12 is an ordinary carbon steel pipe for piping. However, it is not limited to this, and usually,
All pipes that are used as dedicated pipes for water and sewage, gas, oil, telegraph telephone, electric power, etc. can be applied. In addition, main pipe 12
Alternatively, a corrosion-resistant material such as stainless steel may be used, and the inner anticorrosion layer may be omitted.

The outer pipe 13 comes into direct contact with the ground during propulsion, and usually a steel pipe is used. However, the present invention is not limited to this, and other metal pipes, composite material pipes, composite structure pipes, and resin pipes can be applied. As will be described later, a steel pipe provided with projections in the circumferential direction can be used for the outer casing 13 in order to increase the integration strength of the mortar layer 15a and the outer casing 13.

The auxiliary pipe 14 is disposed between the main pipe 12 and the outer pipe 13, and is filled with a filler 15 to be integrally disposed. A mortar layer 15a is formed by using mortar as the filler 15, and the auxiliary pipe 14 is simply and surely arranged integrally.

In this case, four large and small cable dedicated pipes used for transmitting power and information for operation control and maintenance of the pipe are arranged on the auxiliary pipe 14. The number, shape, type, and the like of the auxiliary tubes 14 can be determined as needed.

On the other hand, at the ends 12a and 12b of the main pipe 12, an inner surface welding groove 16 is provided, and the multifunctional pipe 11 for propulsion is provided.
a, when the main pipes are joined to each other,
(Called a bevel) so that the pipeline can be laid. At the time of joining between main officers, the outer pipe 13 and the auxiliary pipe 14 are shorter than the main pipe 12 due to main pipe welding.

The welded portion by the inner surface welding groove 16 is attached to a spacer tube to be described later via a heat insulating layer backing so as to cover the inner surface groove welding portion between the main tubes of the adjacent multifunctional propulsion tubes. By joining the short outer tube and the short auxiliary tube of the spacer tube to the outer tube and the auxiliary tube of the multifunctional propulsion tube, it is possible to easily join the adjacent multifunctional propulsion tubes on site.

The inner and outer surfaces of the main pipe 12 are provided with anticorrosion coating layers 17 and 18. The inner and outer anticorrosion coating layers 17 and 18 of the main pipe 12 are made of a material such as polyethylene, polyurethane, coal tar enamel or FRP, and they are formed at the stage of manufacturing a multifunctional pipe for propulsion at a factory.

The embodiment shown in FIGS. 1 and 2 is a multifunctional propulsion pipe 11a on the premise that the main pipes are joined by butt inner surface welding at the time of propulsion construction, and the following effects are obtained.

Propulsion multifunctional pipe 11 in which auxiliary pipe 14 is arranged
a is manufactured off-line, and in the field work, the propulsion multifunctional pipe 11
a can be made simple joining to shorten the working time. Here, in the starting shaft, after the main pipes are joined by inner surface butt welding to ensure sufficient strength,
Propulsion with jacks and the like is facilitated.

The propulsion multifunctional pipe 11a has a basic structure of a double pipe consisting of a main pipe 12 and an outer pipe 13, and an auxiliary pipe 14 is integrally formed between the main pipe 12 and the outer pipe 13 by a filler 15 such as mortar. It can be manufactured off-line with sufficient consideration of the pipe strength and pipe rigidity against propulsion load and external force after construction. Therefore, by appropriately determining the size of the pipe diameter, the arrangement of auxiliary pipes, etc., it is possible to make the multifunctional propulsion pipe itself compact, minimize the cross-sectional area of the pipeline, and accompanying jacks for propulsion construction. Capacity etc. can be reduced.

Further, since the multifunctional pipe for propulsion 11a does not need to be filled with the filler 15 on site, the time required for the propulsion work can be reduced.

FIG. 3 is a partially cutaway side view showing another embodiment of the multifunctional tube for propulsion of the present invention. 1 are denoted by the same reference numerals, and a part of the description is omitted. In FIG. 3, the multifunctional tube for propulsion 11b has a basic structure of a double tube composed of a main tube 12 and an outer tube 13, an auxiliary tube 14 is arranged between the main tube 12 and the outer tube 13, and a filler is provided therearound. The mortar layer 15a is formed by using mortar as 15, and the auxiliary pipe 14 is simply and surely arranged integrally.

An outer welding groove 19 is provided at the ends 12a and 12b of the main pipe 12, and when the main pipes are joined to each other by the multi-function propulsion pipe 11b, the pipes are laid by joining the outer faces by butt welding. I do. In the welded portion with the outer surface welding groove 19, a spacer tube to be described later is attached so as to cover the outer surface groove welding portion between the main tubes of the adjacent multifunctional propulsion tubes, and the short outer tube and the short auxiliary tube of the spacer tube are attached. This makes it possible to join the adjacent multi-functional propulsion pipes on-site easily by joining the propulsion multi-function pipe to the outer pipe and the auxiliary pipe.

According to the multifunctional propulsion pipe 11b, since the main pipes are joined by outer surface butt welding in the starting shaft and the strength is sufficiently increased, and then the propulsion is performed, the propulsion by the jack or the like can be easily performed. it can.

FIG. 4 is a partially cutaway side view showing another embodiment of the multi-purpose tube for propulsion of the present invention, and FIG. 5 is a cross-sectional view taken along line CC of FIG. 1 are denoted by the same reference numerals, and a part of the description is omitted. In FIG. 4, the multifunctional pipe for propulsion 11c has a basic structure of a double pipe composed of a main pipe 12 and an outer pipe 13, an auxiliary pipe 14 is arranged between the main pipe 12 and the outer pipe 13, and a filler is provided therearound. Fifteen
The mortar layer 15a is formed by using a mortar, and the auxiliary pipe 14 is simply and surely arranged integrally.

As shown in FIG. 5, auxiliary pipes 14 having a constant diameter are arranged at equal pitches in the circumferential direction. As the auxiliary pipe 14, a cable dedicated pipe is used. The propulsion multifunctional pipe 11c is provided with a spigot 20 as a joint at one end 12a of the main pipe 12 and a receiving port 21 at the other end 12b so that adjacent multifunctional pipes for propulsion can be joined at the time of propulsion. I have.

As a result, the multifunctional propulsion pipe 11c is
At the time of joining the main pipes, the joint 21 is inserted by inserting the receptacle 21 of the following multifunctional pipe for propulsion 11c into the receptacle 21 of the multifunctional pipe for propulsion 11c without welding on site. Pipes can be laid.

On the inner surface of the socket 21 provided at one end of the main pipe 12, a multi-stage cylindrical taper is reduced in diameter from the distal end to the inner surface, and the outer surface of the socket 20 is provided from the distal end. The diameter of the pipe is increased in the depth direction, the two pipes are fitted and inserted by press fitting, and the main pipes are joined to each other.

That is, the receiving port 21 has a tapered surface 22b formed on the inner surface, and a plurality of saw blade-shaped protrusions 23b formed in the circumferential direction of the tapered surface 22b are provided at intervals in the axial direction. On the other hand, the spigot 20 has a tapered surface 22a formed on the outer surface thereof, and a plurality of saw blade-shaped protrusions 23a formed in the circumferential direction of the tapered surface 22a are provided at intervals in the axial direction. Therefore, after inserting the spigot 21 of the following propulsion multifunctional tube 11c into the socket 21 of the preceding multifunctional tube 11c and press-fitting the same, the projection 23b of the socket 21 and the projection of the spigot 21 are formed. 23a mesh with each other and remain.

As described above, the projections 23b,
Since the members 23a mesh with each other, a large pull-out preventing force is generated.

After the press-fitting, the surfaces perpendicular to the pipe axes at the tapered end portions of the receiving port 21 and the spout 20 contact each other on the inner diameter side and the outer diameter side, and the propulsion load is transferred from the receiving port 21 to the spout 20. , Or from the outlet 20 to the receiving port 21.

Further, after the press-fitting, the propulsion multifunction pipe 11c which follows the auxiliary pipe reception side of the preceding multifunction pipe 11c for propulsion.
Anti-corrosion coating layer 1 on the inner surface at the joint of the propulsion multifunctional propulsion pipe for the preceding and following propulsion pipes
7. A structure in which each end face of the mortar layer 15a and the outer tube 13 is in close contact with each other.

Usually, the main pipe has a nominal diameter of 900 mm to 20 mm.
A size of 00 mm is applied, but dimensions such as a total length and a nominal diameter can be widely applied according to actual construction specifications.

On the other hand, the anticorrosion coating layers on the inner and outer surfaces of the main pipe including the spigot and the receiving port are made of a material such as polyethylene, polyurethane, coal tar enamel or FRP. It is formed continuously from the tube to the end with the spigot and spout.

The outer tube 13 constituting the double tube
In consideration of the dimensions of the main pipe 12, the outer diameter is determined by the outer diameter of the main pipe, the thickness of the mortar filling layer, and the thickness of the outer pipe.

Normally, the thickness of the outer pipe 13 is set to be equal to or less than the thickness of the main pipe, and the thickness of the mortar layer 15a is set to 2 to 30 times the thickness of the main pipe depending on the application. The strength and rigidity required for the pipe, such as the burial depth and the laying environment, are set in comprehensive consideration.

Further, the mortar layer 15 a
In order to increase the integral strength of the outer tube 13 and the outer tube 13, a steel tube provided with a projection 24 in the circumferential direction is used. The lengths of the outer tube 13, the mortar layer 15a, and the outer anticorrosion layer 17 are longer than the main tube on the receiving side and shorter on the spigot side, and are set so as to be in close contact with each other with a constant surface pressure after press-fitting. 4 and 5, a shape memory alloy can be used for the spigot 20 and the socket 21 provided at the ends 12a and 12b of the main pipe 12.

A shape memory alloy such as a Ti—Ni alloy is used.
By utilizing the contraction of the inner diameter of the socket 1, the spigot 21 can be tightly connected. The same effect can be obtained by using a shape memory alloy for the port ring when the port ring is used for the port and a port ring for the port, which will be described later.

FIG. 6 is a longitudinal sectional view showing an example of a different shape of the auxiliary pipe used in the present invention, FIG. 7 is a longitudinal sectional view showing an example of a multipurpose use of the auxiliary pipe used in the present invention, and FIG. It is a longitudinal section showing an example in which a heat insulation layer was provided around the main pipe used for the present invention. Parts common to those in FIG. 5 are denoted by the same reference numerals, and a part of the description is omitted.

In FIG. 6, the auxiliary pipe 14 is used as a cable pipe, and circular cable pipes 25a and 25 having different pipe diameters.
b, non-circular cable tubes 26a, 26b, 26c
Are arbitrarily arranged in the circumferential direction.

As is apparent from the above description, the auxiliary pipe 14 used in the present invention may have a different pipe diameter, a non-circular pipe, or the like, and may be disposed in the multi-function propulsion pipe as required.

In FIG. 7, the auxiliary pipe 14 is used as a pipe having a different purpose, and a power cable pipe 27a, a communication cable pipe 27b, a utility transport pipe 27c, and a spare pipe 27d are arbitrarily arranged in the circumferential direction.

As is apparent from the above description, as the auxiliary pipe 14 used in the present invention, a plurality of pipes having different purposes can be arranged in the multifunctional propulsion pipe as required.

In FIG. 8, a heat insulating layer 28 is formed on the outer peripheral surface of the main pipe 12 having the inner and outer anticorrosion layers. Heat insulation layer 2
An auxiliary pipe 14 is disposed between the outer pipe 8 and the outer pipe 13, and is filled with a filler 15, and the auxiliary pipe 14 is integrally fixed.

The heat insulating layer 28 formed on the outer peripheral surface of the main pipe 12
This is effective when the heat insulating layer 28 is formed on the entire main pipe and the main pipe 12 handles a material having a high temperature such as hot water supply. When the main pipes of the adjacent multi-functional propulsion pipes are joined to each other by internal groove welding, a case where the heat insulating layer 28 is formed on a part of the main pipe, for example, a short outer pipe, a short auxiliary pipe, and a A spacer tube made of a filling material for filling the inner surface groove welding portion is attached via a heat insulating layer so as to cover the inner surface groove welding portion, and a short outer tube and a short auxiliary tube of the spacer tube are an outer tube and an auxiliary tube of a multifunctional propulsion tube. Can be joined.

FIG. 9 is a view showing an example of a multifunctional propulsion tube having a receiving ring and a spout ring. 4 are denoted by the same reference numerals, and a part of the description is omitted. In FIG. 9, the multi-functional propulsion pipe 11d has a basic structure of a double pipe consisting of a main pipe 12 and an outer pipe 13, an auxiliary pipe 14 is arranged between the main pipe 12 and the outer pipe 13, and a filler is provided therearound. Fifteen
And are arranged integrally. The mortar layer 15a is formed by using mortar as the filler 15, and the auxiliary pipe 14 is simply and reliably disposed integrally.

The multifunctional tube for propulsion 11d according to the present invention has a spigot ring 29 attached to the outer surface of the main tube 11 near the tip end 12c by welding. Reference numeral 30a is a welded portion.
A receiving ring 31 is attached to the outer surface near the rear end 12d by welding. Reference numeral 30b is a welded portion.
Here, fillet welding is performed.

[0092] The distal ends 12c and 12d are provided with inner grooves 16a and 16b for circumferential welding from the inner surface.
The grooves 16a and 16b are reverse V grooves.

The multifunctional pipe 11d for propulsion is applied to the propulsion method, and the spigot ring 29 of the multifunctional pipe for subsequent propulsion is press-fitted to the receiving ring 31 of the multifunctional pipe for propulsion by the jack for propulsion. The joint can be reinforced and propelled by the ring. Therefore, the joint is reinforced at least as much as the main pipe, and the bending rigidity is secured, so the joint and propulsion work between the multifunctional pipe for advance propulsion and the multifunctional pipe for subsequent propulsion in the starting shaft is performed. , Can be performed simply, quickly and without deteriorating the direction controllability of the propulsion.

The multi-functional propulsion pipe 11d has both ends 1
Since the internal welding grooves 16a and 16b are provided on 2a and 12b, the internal welding groove 16b of the preceding propulsion pipe and the internal welding groove 16a of the following propulsion pipe are abutted at the time of press fitting. After the propulsion work, an integrated structure is formed by butt welding from the inside to absorb the displacement of the surrounding ground on average,
Large displacement can be absorbed in the entire pipeline, and high seismic resistance can be secured even in soft ground.

Next, a multi-functional propulsion pipe joint when the multi-functional propulsion pipe shown in the embodiment shown in FIGS. 1 to 9 is used in a propulsion method will be described in detail.

FIG. 10 is a partially cutaway side view showing one embodiment of the multifunctional pipe joint for propulsion. Multifunctional fittings for propulsion 3
2 is provided with an inner surface welding groove 16 at the end portions 12a, 12b of the main pipes 12 of the adjacent multifunctional pipe 11a for propulsion, and when joining the main pipes, inner butt welding (referred to as an inverted V groove). )
It is applied when laying a pipeline by joining. The main propulsion multifunctional pipe 11a is made shorter than the main pipe 12 because the outer pipe 13 and the auxiliary pipe 14 are used for main pipe welding.

A spacer tube 35 is attached to the welded portion 33 having the inner surface butt welded via a heat insulating layer backing 34 so as to cover the welded portion 33 from the back side, and the short outer tube 36 and the short auxiliary tube 37 of the spacer tube 35 are propelled. To the outer tube 13 and the auxiliary tube 14 of the multifunctional tube 11a. Arrows indicate the direction of propulsion. Code 3
Reference numeral 8a is a shrink tube having an anticorrosion function.

Spacer tube 3 prepared offline in advance
Since it is sufficient to attach the welded portion 5 having the inner surface butt-welded to the back surface 5 from the back side, it is possible to quickly join the adjacent multi-functional propulsion pipes on site. Spacer tube 35
In general, a two-piece type is used for quick and easy installation.

FIG. 11 is a partially cut-away side view showing another embodiment of the multifunctional pipe joint for propulsion.

The multifunctional pipe joint 39 for propulsion is provided with an outer surface welding groove 19 at the ends 12a and 12b of the main pipes 12 of the adjacent multifunctional pipes for propulsion 11b.
It is applied to the case where the pipes are laid by joining by outer surface butt welding (referred to as V groove). This main multifunctional pipe for propulsion 1
In FIG. 1b, the outer pipe 13 and the auxiliary pipe 14 are shorter than the main pipe 12 for main pipe welding.

A spacer tube 41 is attached to the welded portion 40 having the outer surface butt-welded so as to cover the weld portion 40.
The short outer pipe 42 and the short auxiliary pipe 43 are the multifunctional pipe 1 for propulsion.
1b is joined to the outer tube 13 and the auxiliary tube 14. Arrows indicate the direction of propulsion. Reference numeral 38b is a shrink tube having a function of an anticorrosion layer.

Spacer tube 4 prepared offline in advance
Since it is sufficient to mount the first multifunction pipe 1 so as to cover the welded portion 40 where the outer surface is butt-welded, it is possible to quickly join the adjacent multifunctional pipes for propulsion on site. In general, a two-piece spacer tube 41 is used for quick and easy installation.

FIG. 12 is a sectional side view of a main part showing another embodiment using a multifunctional pipe joint for propulsion. The multifunctional pipe joint 44 for propulsion includes the spigot joint 20a at the main pipe end 12a (not shown) of the multifunctional pipe 11c for propulsion, and the receiving joint 2 at the main pipe end 12b.
1a, when the main pipes of the adjacent multi-function propulsion pipes 11c are joined to each other, the splice joint 2 of the multi-function pipe 11c for propulsion that follows the reception joint 21a of the multi-function pipe 11c for advance propulsion.
0b is inserted and joined, and applied when laying a pipeline. Here, the receiving joint 2 of the multifunctional pipe 11c for advance propulsion is used.
Spout joint 20b of multifunctional pipe for propulsion 11c following 1a
Is set, the assembly of the press-fitting joint is completed by centering, insertion and press-fitting by the propulsion jack, and the multifunctional pipe for forward propulsion 11c and the multifunctional pipe for propulsion 11c that follow are integrated.

The inner surface of the receiving joint 21a has a multi-stage cylindrical taper whose diameter is reduced in the depth direction from the distal end, and the outer surface of the spigot joint 20b is expanded in the depth direction from the distal side, and both are fitted by press-fitting. The main pipes are inserted and joined together. A tapered surface 22b is formed on the inner surface of the receiving joint 21a, and a plurality of saw blade-shaped projections 23b formed in the circumferential direction of the tapered surface 22b are provided at intervals in the axial direction. On the other hand, the spigot joint 20b has a tapered surface 22a formed on the outer surface thereof, and saw-shaped protrusions 23 formed in the circumferential direction of the tapered surface 22a.
a are provided at intervals in the axial direction.

Therefore, after inserting the spigot joint 20b of the succeeding multi-function pipe 11c into the socket joint 21a of the preceding multi-function pipe 11c and press-fitting the same, the socket joint 2
The projection 23b of 1a and the projection 23a of the spigot joint 20b mesh with each other and remain, thereby generating a large pull-out preventing force.

As will be described later, the multi-functional propulsion fitting 44 is provided with a cylindrical taper 51a whose diameter is reduced in the depth direction from the distal end side on the inner surface of the receiving joint, and is provided on the outer surface of the spigot joint from the distal end side. It is also possible to provide a cylindrical taper 51b whose diameter is increased in the direction, and join the joint by one or more of means by press-fitting, shrink fitting, cold fitting, and bonding.

According to the propulsion multifunctional pipe joint 44, when the main pipes are press-fitted to each other, the preceding propulsion multifunctional pipe 11
c, both ends of the auxiliary pipe 14 of the following multifunctional pipe for propulsion 11c are joined, and the anticorrosion coating layer 17 on the inner surface at the joint portion of the multifunctional pipe for propulsion 11c of the preceding and following propulsion pipes,
The mortar layer 15a and each end face of the outer tube 13 are in close contact with each other.

On the other hand, the anticorrosion coating layers 17 and 18 on the inner and outer surfaces of the main pipe including the spigot joint 20b and the receiving joint 21a are made of polyethylene, polyurethane, coal tar enamel or FR.
P, etc., which are multifunctional tubes for propulsion 11c
Is formed continuously from the main pipe to the end having the spout joint and the spout joint at the factory manufacturing stage.

As an example, when a carbon steel pipe for piping is applied to the main pipe, the spigot joint 20b of the multifunctional pipe 11c for trailing propulsion is connected to the receiving joint 21a of the multifunctional pipe 11c for preceding propulsion.
The total length of the joint after press-fitting is 0.2 to 2.0
The thickness and the thickness are 1.2 to 5.0 times that of the main pipe, and the taper of the press-fit surface is 1/8 to 1/32. Here, after the press-fitting, the projection 23b of the socket joint 21a and the spigot joint 20
The protrusions 23a of b are engaged with each other and remain to generate a large pull-out preventing force.

The thickness of the joint at the press-fitting portion is 0.5 to 2.0 times the thickness of the main pipe at the front end of the socket and the spigot. Is provided. In this press-fit joint, the compressive force at the time of propulsion and the compressive force due to bending load are borne by both contact surfaces of the distal end surface of the spigot joint 20b on the inner surface side of the joint and the innermost end surface of the receiving joint 21a. In addition, the tensile load is borne by the shear force and the contact friction force at the root of the projection 23a due to the engagement between the projection 23a and the projection 23b. Therefore, each part of the joint is dimensioned so that local buckling or breakage due to these loads, and furthermore, no pull-out occurs.Also, even with repeated propulsion loads, allowance should be made so that cracks and sagging of the contact surface do not occur. Projections 23a, 23b
Is set.

Further, since the outer anticorrosion coating layer 18 of the press-fitting joint formed by joining the receiving joint 21a and the spigot joint 20b is also press-fitted to each other, the joining can be performed by applying an adhesive or the like to the joining surface in advance. Can be assured.

Further, a resin mortar or the like is applied to the end surfaces of the mortar layer 15a of the multifunctional tube for leading propulsion 11c and the multifunctional tube for trailing propulsion 11c to integrate them. Further, the ends of the outer tube 13 of the multifunctional pipe for leading propulsion 11c and the multifunctional pipe for trailing propulsion 11c are subjected to partial welding or the like as necessary, so that the multifunctional pipe for leading propulsion 11c and the multifunctional pipe for trailing propulsion are used. The integration of the functional tube 11c can be further strengthened.

As described above, the multifunctional pipe joint for propulsion 44
By omitting the welding process in the on-site propulsion work, the conventional propulsion work can be significantly speeded up and high reliability of the pipeline can be secured.

FIG. 13 is a side sectional view showing another embodiment of the multifunctional pipe joint for propulsion. Parts common to those in FIG. 9 are denoted by the same reference numerals, and a part of the description is omitted.

The multifunctional pipe joint 45 for propulsion has a spout ring joint 29a at the main pipe end 12c (not shown) of the preceding multifunctional pipe 11d for propulsion, and the receiving ring joint 31 at the main pipe end 12d.
a, the main propulsion pipe 11d is connected to the adjacent propulsion multifunction pipe 11d when the main pipes are joined to each other.
Multifunctional pipe 11 following the receiving ring joint 31a
This is applied when the spout ring joint 29b of d is inserted and joined to lay a pipe.

The inner surface of the receiving ring joint 31a has a multi-stage cylindrical taper whose diameter is reduced in the depth direction from the distal end side, and the outer surface of the spigot ring joint 29b is expanded in the depth direction from the distal end side. Are fitted and the main pipes are joined to each other.

The multi-function pipe joint 45 for propulsion is press-fitted to the receiving ring joint 31a of the multi-function pipe 11d for leading propulsion and the spigot ring joint 29b of the multi-function pipe 11d for subsequent propulsion with a jack for propulsion. The joint is reinforced and propelled by the ring joint.

Further, a stuffing box 46 is provided at a contact portion between the receiving ring joint 31a and the spigot ring joint 29b, and a seal rubber ring 47 is disposed therein. The outer surface of the ring joint formed by press-fitting the receiving ring joint 31a and the spigot ring joint 29b is provided with the anticorrosion coating layer 18.

When the main pipes 12 are press-fitted to each other, the propulsion multi-function pipe joint 45 is connected to the propulsion multi-function pipe 11d.
Both ends of the auxiliary pipe 14 of the following multifunctional pipe for propulsion 11d and the auxiliary pipe 14 of the following multifunctional pipe for propulsion 11d are joined, and the inner anticorrosion coating layer 17 and the outer anticorrosion at the junction of the propulsive multifunctional pipe propulsion pipe 11d of the preceding and following propulsion The end faces of the coating layer 18, the mortar layer 15a, and the outer tube 13 are in close contact with each other.

According to the multifunctional pipe joint 45 for propulsion, the spigot ring 29b of the multifunctional pipe 11d for subsequent propulsion is press-fitted to the receiving ring joint 31a of the multifunctional pipe 11d for propulsion by the jack for propulsion. The joint is reinforced by the above-mentioned ring joint to be equal to or more than the main pipe, and the bending rigidity is secured, so that the multifunctional pipe 11d for forward propulsion and the multifunctional pipe 11d for subsequent propulsion in the starting shaft are The propulsion operation can be performed reliably, simply, and quickly without reducing the controllability of the direction of the propulsion.

The multi-functional propulsion pipe 11d is provided at both ends 1
Since the inner welding grooves 16a and 16b are provided on 2c and 12d, the inner welding groove 16b of the multifunctional pipe 11d for leading propulsion and the inner groove 16a for welding the inner pipe 16 of the following propulsion pipe 11d at the time of press fitting. After the propulsion work, the joint structure is integrated by butt welding from the inner surface side after the propulsion work, so that the displacement of the surrounding ground can be absorbed on average, and large displacement can be absorbed as a whole pipe line. Also, high seismic resistance can be secured. Reference numeral 53 denotes a welded portion formed by butting the inner surfaces.

According to the multifunctional fitting 45 for propulsion,
The joint is reinforced at least as much as the main pipe, and the bending rigidity is secured. Therefore, the multifunctional pipe for advanced propulsion 11d in the starting shaft
Work of joining and propulsion with the multifunctional pipe 11d for
The operation can be performed reliably, simply, and quickly without reducing the controllability of the direction of propulsion.

Further, the stuffing box 46 is provided at the contact portion between the receiving ring joint 31a and the spigot ring joint 29b, and the sealing rubber ring 47 is disposed therein, so that the sealing performance is further ensured. Seal rubber ring 47
Are set so that the compression ratio is 10 to 50%.

Further, as will be described later, a water-absorbing expanded rubber can be disposed at the joint of the propulsion multifunctional pipe propulsion pipe 11d of the preceding and succeeding propulsion pipes, if necessary.

FIG. 14 is a side sectional view showing another embodiment of the multifunctional pipe joint for propulsion. 13 are denoted by the same reference numerals, and a part of the description is omitted. The multi-functional propulsion pipe joint 48 is provided with a spout ring joint 49a at the main pipe end 12c (not shown) and a receiving ring joint 50a at the main pipe end 12d of the preceding multi-function pipe 11e. At the time of joining the main pipes with the multi-function propulsion pipe 11e, the receiving ring joint 50a of the multi-function pipe 11e for advance propulsion is used.
Ring joint 49 of multifunctional pipe 11e for propulsion to follow
This is applied to the case where b is inserted and joined to lay a pipeline.

On the inner surface of the receiving ring joint 50a, a cylindrical taper 51a is reduced in diameter from the distal end to the inner side, and on the outer surface of the spigot ring joint 49b, a cylindrical taper 51b is expanded from the distal end to the inner side. The main pipes are joined together by press-fitting.

The joint between the spigot joint 49b and the receiving joint 50a of the adjacent multi-function propulsion pipe 11e is joined by press-fitting and bonding.

The joining portion between the spigot ring joint 49b and the receiving joint 50a is not limited to the press-fitting / adhering means, but can be joined by one or more of press-fitting, shrink fitting, cold fitting, and bonding means. These means can be appropriately selected as needed.

The multifunctional pipe joint 48 for propulsion is formed by press-fitting and bonding the spigot ring joint 49b of the multifunctional pipe 11e for trailing propulsion with the jack for propulsion to the receiving ring joint 50a of the multifunctional pipe 11e for preceding propulsion. Then, the joint is reinforced and propelled by the press-fit ring joint.

Further, an anticorrosion coating layer 18 is formed on the outer surface of the ring joint formed by press-fitting and bonding the receiving ring joint 50a and the spigot ring joint 49b.

When the main pipes 12 are press-fitted and adhered to each other, the propulsion multifunctional pipe joint 48 assists the auxiliary pipe 14 of the preceding multifunction pipe 11e and the propulsion multifunction pipe 11e that follows. Both ends of the pipe 14 are joined, and the inner anticorrosion coating layer 1 at the junction of the preceding and following multifunctional propulsion pipes 11e for propulsion is provided.
7. Each end face of the outer anticorrosion coating layer 18, the mortar layer 15a and the outer pipe 13 is in close contact.

Further, a water-absorbing and expanding rubber 52 is disposed at the joint of the preceding and following multi-function propulsion pipes 11e for propulsion, and even when propelled on the ground having a high groundwater level, the contact surface of the water-absorbing and expanding rubber 52 is high. The pressure improves the sealing performance against earth and sand and infiltration water.

Further, as the multifunctional pipe joint 48 for propulsion, the above-mentioned stuffing box 46 may be provided, and the seal rubber ring 47 may be disposed therein.

The multi-function propulsion fitting 44 described above is provided with a cylindrical taper 51a whose diameter is reduced in the depth direction from the distal end on the inner surface of the receiving joint, and is expanded in the depth direction from the distal end on the outer surface of the spigot joint. It is also possible to provide a cylindrical taper 51b having a diameter, and join the joints by one or more of means of press-fitting, shrink fitting, cold fitting, and bonding.

As is clear from the above embodiments, the present invention has the following effects. The multi-functional propulsion pipe has a basic structure of a double pipe consisting of a main pipe and an outer pipe, and an auxiliary pipe is integrally arranged between the main pipe and the outer pipe. Alternatively, a tube having an integrated structure of a main tube and an outer tube in which an auxiliary tube is disposed therebetween and a gap is fixed by a filler such as mortar can be propelled. Therefore, in the repeated propulsion process, the work of filling the filler such as mortar on the site is unnecessary, and the efficiency of the propulsion construction can be improved. In addition, the auxiliary pipe such as a cable dedicated pipe is connected and laid at the same time as the main pipe connection, so that the propulsion construction process can be greatly reduced.

[0136] The main pipe of the multi-functional propulsion pipe, which is provided with a socket and a spigot at the end as a joint, can eliminate the need for on-site welding, so that it can be subjected to working environments such as rain, snow, or vibration. Since it is difficult to do so, the construction period can be shortened drastically along with the continuation of the propulsion work, the service period of expensive large-scale equipment accompanying the propulsion work can be shortened, and the construction cost can be significantly reduced by eliminating the welding process.

In order to show an example of the effect, the time required for one propulsion process in a state where the work of arranging the auxiliary pipe on site was omitted was examined. When the total working time of the conventional external welding propulsion method using a propulsion pipe is 100%, the propulsion method using a multifunctional pipe for propulsion according to the present invention (referred to as rapid construction method), without welding, and in the case of batch internal welding The total working time was plotted. The result is shown in FIG.

FIG. 15 is a diagram showing an example of a comparison of the working time between the propulsion method using the multifunctional pipe for propulsion of the present invention and the conventional welding method for outer surface welding of the propulsion pipe. Both the present invention and the conventional propulsion pipe used a double pipe type propulsion pipe.

As is clear from FIG. 15, when the total working time of the conventional outer surface welding propulsion method using the propulsion pipe is 100%, the total working time of the rapid construction method using the propulsion pipe of the present invention is the case where welding is performed. Was about 87% and about 52% without welding. As a breakdown, in the present invention example, the work time is shortened because there is no mortar filling and installation of the outer tube spacer (joint ring) on site, and the work time is shortened in the case of no welding joint. Is remarkable.

The multifunctional pipe for propulsion according to the present invention has the remarkable effect because the above-mentioned double pipe has a basic structure and the auxiliary pipe can be simultaneously formed.

Since a filler such as mortar is filled between the main pipe and the outer pipe and is firmly integrated, the strength of the auxiliary pipe such as a cable dedicated pipe at the time of piping and propulsion construction is high.

Since the press-fit joint integrated with the main pipe exhibits a high sealing property, the reliability of the integrated auxiliary pipe is also high.

After the propulsion work, the joint becomes an integral structure with the main pipe, and can exhibit the same rigidity and strength as the main pipe. Therefore, the displacement of the surrounding ground can be absorbed on average, and the large displacement can be absorbed as the whole pipe line. Therefore, high earthquake resistance can be ensured even in soft ground. Since the main pipe joint has high rigidity, deformation of the auxiliary pipe joint is also prevented.

The present invention can be applied to a case where the main pipe is made of a stainless steel material, a stainless clad material, or a stainless steel lining.

On the other hand, with the stricter water quality regulations year by year, if the inner surface of the pipe that comes in contact with water is made of stainless steel, it is much more sanitary than organic materials, It is ideal for pipelines for supplying safe water that can meet the needs of water users.

Since the joint is press-fitted and assembled using the propelling compressive force as it is, no special assembling apparatus or space is required, and since the contact surface between the spout and the spout is tapered, the spout is inserted into the spout. Since the centering of the tube shaft is performed only by inserting, no special centering device is required.

Basically, there are no fitting parts, main pipe, outer pipe,
Since the filler and joints such as mortar are integrated,
Pipe joining work is very simple, high efficiency and high construction quality.

The joint is integrally formed with the main pipe (abset processing,
Since both machining and welding can be applied, there are many joint materials, and there is a wide range of material choices for structural optimization.

[0149]

As described above, the multifunctional propulsion pipe of the present invention has a basic structure of a double pipe consisting of a main pipe and an outer pipe, and an auxiliary pipe is integrally disposed between the main pipe and the outer pipe. When laying a pipeline including auxiliary pipes that are to be multifunctional by the propulsion method using it, the entire construction period is shortened, construction is facilitated, and auxiliary pipes are installed. It can be laid at the same time as the main pipe, and the strength of the joint that joins the main pipes can be retained more than the main pipe.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing an example of an embodiment of a propulsion pipe according to the present invention.

FIG. 2 is a sectional view taken along line BB of FIG. 1;

FIG. 3 is a partially cutaway side view showing another embodiment of the multifunctional propulsion tube of the present invention according to the present invention.

FIG. 4 is a partially cutaway side view showing another embodiment of the multifunctional tube for propulsion of the present invention.

FIG. 5 is a sectional view taken along line CC of FIG. 4;

FIG. 6 is a longitudinal sectional view showing an example of a different shape of an auxiliary pipe used in the present invention. ,

FIG. 7 is a longitudinal sectional view showing an example of a multipurpose use of an auxiliary pipe used in the present invention.

FIG. 8 is a longitudinal sectional view showing an example in which a heat insulating layer is provided around a main pipe used in the present invention.

FIG. 9 is a diagram showing an example of a multifunctional propulsion tube having a receiving ring and a spout ring according to the present invention.

FIG. 10 is a partially cutaway side view showing one embodiment of the multifunctional pipe joint for propulsion according to the present invention.

FIG. 11 is a partially cutaway side view showing another embodiment of the multi-purpose propulsion fitting according to the present invention.

FIG. 12 is a side sectional view showing a main part of another embodiment of the multi-purpose pipe joint for propulsion according to the present invention.

FIG. 13 is a side sectional view showing another embodiment of the multifunctional fitting for propulsion according to the present invention.

FIG. 14 is a side sectional view showing another embodiment of the multi-functional propulsion fitting according to the present invention.

FIG. 15 is a diagram showing an example of a comparison of the working time between the propulsion method using the multifunctional pipe for propulsion of the present invention and the conventional welding method for outer surface welding of the propulsion pipe.

FIG. 16 is a diagram showing an example of a conventional sheath pipe propulsion construction.

FIG. 17 is a view showing an example of a conventional propulsion construction of a main pipe in a sheath pipe.

FIG. 18 is a view showing an example of a conventional propulsion construction of an auxiliary pipe in a sheath pipe.

FIG. 19 is a sectional view taken along line AA of FIG. 18;

[Explanation of symbols]

11a, 11b, 11c, 11d, 11e Multifunctional pipe for propulsion 12 Main pipe 12a, 12b End 12c, 12d Tip 13 Exterior pipe 14 Auxiliary pipe 15 Filler 15a Mortar layer 16, 16a, 16b Inner groove 17 for welding Inner anticorrosion coating layer 18 Outer anticorrosion coating layer 19 Outer surface welding groove 20 Spout 20a, 20b Spout joint 21 Receptacle 21a, 22b Receptacle joint 22a, 22b Tapered surface 23a, 23b Projection (saw blade) 24 Projection (Exterior pipe) 26a, 26b, 26c Cable pipe 27a Power cable pipe 27b Communication cable pipe 27c Utility transport pipe 27d Preliminary pipe 28 Heat insulation layer 29, 49 Spacing ring 29a, 29b, 49a, 49b Spacing ring joint 30a, 30b Welding Part 31, 50 Inlet ring 31a, 31b, 50a, 50b Inlet ring Hands 32, 39, 44, 45, 48 Multifunctional pipe joints for propulsion 33, 53 Welded portion (internal butt welding) 34 Backing of heat insulation layer 35, 41 Spacer tube 36, 42 Short outer tube 37, 43 Short auxiliary tube 38a, 38b Shrink tube 40 Weld (outside butt welding) 46 Stuffing box 47 Seal rubber ring 51a, 51b Cylindrical taper 52 Water-absorbing expansion rubber

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F16L 39/00 F16L 39/00 // F16L 1/024 1/02 E (72) Inventor Eiji Matsuyama Tokyo 1-1-2 Marunouchi, Chiyoda-ku Nihon Kokan Co., Ltd. (72) Inventor Masaki Yoshikawa 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. 1-2-1 Marunouchi Nihon Kokan Co., Ltd. F-term (reference) 2D054 AC18 AD27 AD28 3H013 BA02 FA01 FA04 3H015 GA05 3H111 AA01 CA14 CA17 CA23 CB28 DB16 3J106 AB04 BA01 BB01 BC04 BD01 BE29 CA02 CA20 EA03 EB01 EC01 EC06

Claims (11)

[Claims] 1. A propulsion pipe used in a propulsion method for laying a conduit by joining main pipes, wherein the propulsion pipe has a basic structure of a double pipe consisting of a main pipe and an outer pipe. A multifunctional propulsion pipe characterized in that an auxiliary pipe is integrally arranged between the outer pipe and the outer pipe. 2. The multifunctional propulsion pipe according to claim 1, wherein an auxiliary pipe is integrally disposed between the main pipe and the outer pipe via a filler. 3. The multifunctional pipe for propulsion according to claim 1, wherein the main pipe is provided with a spigot at one end and a socket at the other end as a joint. 4. The receiving port has a tapered surface formed on the inner surface, a plurality of saw blade-shaped projections formed in the circumferential direction of the tapered surface at intervals in the axial direction, and the slot is tapered on the outer surface. The surface is formed, and a plurality of saw blade-shaped protrusions formed in the circumferential direction of the tapered surface are provided at intervals in the axial direction, and at the time of joining the main pipes, at the socket of one main pipe. 4. The multifunctional propulsion pipe according to claim 3, wherein after the spigot of the other main pipe is fitted, the projections of the socket and the spigot mesh with each other and remain. 5. The multifunctional tube for propulsion according to claim 3, wherein the spigot or the receiving port is made of a shape memory alloy. 6. The multifunctional propulsion pipe according to claim 3, wherein the spigot comprises a spigot ring and the spout comprises a spout ring. 7. A multi-functional propulsion pipe joint to which the multi-function propulsion pipe according to claim 1 or 2 is joined, wherein the main pipes of adjacent multi-function propulsion pipes are joined with an inner groove. It is welding, and a spacer pipe comprising a short outer pipe, a short auxiliary pipe, and a filler filling between them is attached via a heat insulating layer backing so as to cover the back side of the inner groove welding portion between the main pipes. A multifunctional joint for propulsion, characterized in that the short outer tube and the short auxiliary tube of the spacer tube are joined to the outer tube and the auxiliary tube of the multifunctional tube for propulsion. 8. A multi-functional propulsion pipe joint to which the multi-function propulsion pipe according to claim 1 or 2 is joined, wherein the main pipes of adjacent multi-function propulsion pipes are joined with an outer groove. It is welding, and a spacer pipe made of a short outer pipe, a short auxiliary pipe, and a filler filling between them is attached so as to cover the outer surface groove welding portion, and the short outer pipe and the short auxiliary pipe of the spacer pipe are attached. A multifunctional fitting for propulsion characterized in that it is joined to an outer pipe and an auxiliary pipe of the multifunctional pipe for propulsion. 9. A propulsion multifunction pipe joint to which the multifunction propulsion pipe according to claim 3, 4, 5, or 6 is joined, wherein an adjacent spout joint and an adjacent spout joint are provided. A multifunction pipe joint for propulsion, characterized in that a stuffing box is provided on at least one side of a contact portion with a sealing rubber ring. 10. A multi-functional propulsion joint to which the multi-function propulsion pipe according to claim 3, 4, 5, or 6 is joined, wherein a water absorbing expansion occurs at a contact portion of the outer pipe. Multifunctional pipe joint for propulsion characterized by having rubber arranged. 11. A multi-purpose propulsion pipe joint to which the multi-function propulsion pipe according to claim 3, 4, 5, or 6 is joined, wherein a difference between adjacent multi-function propulsion pipes is provided. A multifunctional pipe joint for propulsion, characterized in that a joint between a mouth joint and a receiving joint is joined by one or more means of press-fitting, shrink fitting, cold fitting, and bonding.