JPH08165702A - Pipe line construction method - Google Patents

Abstract

PURPOSE: To form a continuous cable conduit at the same time as the construction work of a pipe line in the ground. CONSTITUTION: After a plurality of pipe bases 1 formed by penetrating cable conduit small holes 3 at least in the longitudinal direction are connected in the longitudinal direction, pipe lining materials 10 formed by impregnating curable resin into them are inverted to insert them into the small holes 3 with fluid pressure, and the hard resin infiltrated into the pipe lining materials 10 is solidified in a state to push them against the inside circumferential walls of the small holes 3. When a pipe line is constructed, if a plurality of pipe bases 1 are connected, a plurality of small holes 3 are linked to form a cable conduit 8 in the pipe bases 1, and since the conduit 8 is monolithically lined with the pipe lining materials 10, even if there uneven steps in joint sections of the pipe bases 1 thereafter, the pipe lining materials 10 are deformed in accordance with the uneven steps to ensure the continuous cable conduit 8. For that pourpose, disconnection of the cable passing through the cable conduit 8 is prevented. The cable conduit 8 is formed at the same time as the construction work of the pipe line in the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention lays a pipeline in the ground by connecting in the length direction a plurality of pipe bases formed by penetrating small holes for cable passage in at least the length direction. Regarding construction method.

[0002]

2. Description of the Related Art In recent years, multimedia has come into the limelight, but in order to realize this multimedia, it is necessary to solve the problem of laying cables such as optical fibers for communication.

By the way, as a method of laying the cable, for example, a method of laying the cable at the same time when the sewer pipe is buried in the ground is conceivable. In that case, the cable is installed on a plurality of pipe bases to support the sewer pipe. A small hole for passing a wire is formed in advance, and a plurality of pipe bases are connected in a straight line in the lengthwise direction when burying a sewer pipe to form a passage for a cable passing line that is composed of continuous small holes. It is also possible.

[0004]

However, in reality, the sewer pipe buried in a straight line in the ground is curved over time due to earth pressure. In the case of the above method, a step is formed at the connecting portion of the pipe base. There is a possibility that a cable will be generated and the cable passed through the small hole will be broken.

The present invention has been made in view of the above problems, and an object of the present invention is to lay a pipeline in which a continuous cable passage can be formed at the same time as laying a pipeline in the ground. To provide a construction method.

[0006]

In order to achieve the above object, the invention according to claim 1 has a plurality of pipe bases formed by penetrating small holes for cable passage in at least the length direction. , The tube lining material impregnated with a curable resin is reversed and inserted into the small hole by fluid pressure, and the tube lining material is pressed against the inner peripheral wall of the small hole,
It is characterized in that the curable resin impregnated in this is cured.

According to a second aspect of the present invention, in the first aspect of the present invention, each pipe base is provided with a large hole for a main pipe in a central portion thereof in a longitudinal direction, and a plurality of pipe bases are provided. After connecting in the length direction, a pipe lining material impregnated with a curable resin is reversely inserted into the small hole and the large hole by fluid pressure, and each pipe lining material is inserted into the inner wall of each of the small hole and the large hole. It is characterized in that the curable resin impregnated in each pipe lining material is cured while being pressed to.

According to a third aspect of the invention, in the first aspect of the invention, the plurality of pipe bases are connected by a pipe joint fitted in the small hole.

According to a fourth aspect of the invention, in the second aspect of the invention, the plurality of pipe bases are connected by pipe joints fitted into the small hole and the large hole, respectively.

According to a fifth aspect of the invention, in the first or second aspect of the invention, a convex portion is formed at one end of each of the pipe bases and a concave portion is formed at the other end of the pipe bases. It is characterized by connecting according to the combination.

[0011]

According to the first aspect of the present invention, when a plurality of pipe bases are connected in the lengthwise direction when the pipe is buried in the ground, small holes for cable passage are formed in these pipe bases. A continuous passage for cable passage is formed, and this passage is lined up and integrated by a pipe lining material that is then reversed and inserted into the pipe to harden it. Even if some level difference occurs, the pipe lining material is deformed according to the level difference, and a continuous cable passage is secured.
Therefore, disconnection of the cable passed through the cable passage can be reliably prevented.

According to the second aspect of the present invention, when a plurality of pipe bases are connected in the length direction, a continuous main passage is formed at the same time as a cable passage passage in which large holes for the main pipe are continuous. When the main passage is lined with a pipe lining material which is then inverted and inserted and hardened, the main pipe constitutes the main pipe as it is, so that it is not necessary to separately prepare the main pipe. Further, thereafter, even if some level difference occurs in the connecting portion of the pipe base due to earth pressure, the pipe lining material is deformed according to the level difference to secure a continuous main passage,
Fluid leakage from the main passage is reliably prevented.

Further, according to the invention of claim 3, the pipe base is provided with a pipe joint fitted in the small hole,
According to the invention described in claim 4, since the pipe joints are fitted into the small hole and the large hole respectively, and according to the invention described in claim 5, they are connected by the concave and convex fitting, respectively. Are connected in a straight line to each other, and even if they are subjected to some earth pressure, there is no step at the connecting portion.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

<First Embodiment> FIG. 1 is a perspective view of a pipe base used in the method of the present invention, FIG. 2 is a sectional view showing the pipe base before connection, and FIG. 3 is a connecting portion of the pipe base. FIG. 4 is an enlarged detailed view of portion A of FIG. 3, and FIG. 5 is a sectional view showing a lining operation for the pipe base.

A pipe base 1 having a predetermined length shown in FIG. 1 is integrally molded in a square pole shape with lightweight concrete or the like, and a large hole 2 for a main pipe is provided in a central portion of the large diameter hole 2 in the longitudinal direction. In the periphery (four corners) of the same, four small holes 3 for cable passage are also provided so as to extend in parallel to each other in the length direction.
Then, as shown in FIG. 2, fitting holes 2a and 3a which are continuous with the large hole 2 and the small hole 3 are formed at both ends of the pipe base 1, respectively.

When laying a pipeline, a plurality of pipe bases 1 are provided in a groove (not shown) formed by excavating soil.
Are aligned and connected to each other. That is, as shown in FIG. 2, the large and small plastic pipe joints 4 and 5 inserted into the fitting holes 2a and 3a formed in one pipe base 1 and the fitting holes formed in the other pipe base 1 are inserted. By fitting into 2a and 3a, two adjacent pipe bases 1 are connected as shown in FIG.
Similarly, a plurality of pipe bases 1 are connected in a straight line in the length direction as shown in FIG. As shown in detail in FIG. 4, the large holes 2 and small holes 3 of each pipe base 1 contain sand or small stones 6 having a relatively large particle size.

When a plurality of pipe bases 1 are linearly connected as described above, a plurality of large holes 2 are connected to form one main passage 7 as shown in FIG. Similarly, a plurality of small holes 3 are connected to form four cable passages 8, and pipe lining materials 9 and 10 of different sizes are reversely inserted into the passages 7 and 8 by fluid pressure. Each of the lining materials 9 and 10 is formed by impregnating a tubular resin absorbent material made of a nonwoven fabric such as polyester, nylon, polypropylene, or acrylic with a thermosetting resin such as polyester resin or epoxy resin.

As described above, the pipe lining material 9, 10
When the pipes are inserted into the respective passages 7 and 8 over their entire length, the pipe lining materials 9 and 10 are expanded by the fluid pressure and pressed against the inner peripheral walls of the passages 7 and 8 by any means ( For example, when the pipe lining materials 9 and 10 are heated using hot water, hot air, etc., the thermosetting resin impregnated therein is cured, and the passages 7 and 8 are formed by the cured pipe linings 9 and 10. The inner peripheral wall is lined and integrated. As described above, the sand or pebbles 6 having a relatively large particle size is provided around the large holes 2 and the small holes 3 of each pipe base 1.
Etc., the thermosetting resin excessively impregnated in the pipe lining materials 9 and 10 permeates around the large holes 2 and the small holes 3 of the pipe base 1 to be hardened, whereby the pipe lining materials 9 and 10 are hardened. The inner peripheral wall of the large hole 2 and the small hole 3 tightly adhere 10 to each other.

When the passages 7 and 8 are lined as described above, the passage 7 constitutes a main pipe such as a sewer pipe as it is, so that it is not necessary to separately prepare a main pipe.
Significant cost reduction can be achieved. Further, since the four passages 8 formed around the main passage 7 constitute a cable passage, it is possible to pass a cable such as a communication optical fiber or a cable TV cord through the passage 8. It can contribute to the realization of multimedia.

By the way, since the plurality of pipe bases 1 are connected by the pipe joints 4 and 5, a step is unlikely to occur at these connecting portions, but the pipe base 1 is subjected to a large earth pressure to cause a step at the connecting portions. Even if the above occurs, the flexible pipe lining materials 9 and 10 are deformed according to the step to secure the continuous main pipe passage 7 and the continuous cable passage 8 respectively. Therefore, even if there is a slight step in the connecting portion of the pipe base 1,
There is no problem such as fluid leaking from the main passage 7 or disconnection of the cable passing through the cable passage 8.

As described above, according to this embodiment, the continuous main passage 7 and the continuous cable passage 8 can be simultaneously formed.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7
Is a perspective view of the pipe base used in this embodiment, and FIG. 8 is a cross-sectional view showing the lining work for the pipe base. In these figures, the same elements as those shown in FIGS. Attached.

The construction method according to this embodiment differs from the first embodiment only in the method of connecting the pipe base 1. That is, as shown in FIG. 6 and FIG. 7, each pipe base 1 is integrally formed in the shape of a quadrangular prism as in the first embodiment, and a large hole 2 for the main pipe is provided in the center thereof in the longitudinal direction. Around the large hole 2 (four corners), four small holes 3 for cable passage are also provided in the lengthwise direction. One end surface of the pipe base 1 is as shown in FIG. A regular octagonal columnar convex portion 1a is projected around the large hole 2, and a concave portion 1b having a regular octagonal cross section is formed around the large hole 2 at the other end as shown in FIG.

Thus, in laying a pipeline, a plurality of pipe bases 1 are arranged in a straight line and connected to each other. As shown in FIG. 8, two adjacent pipe bases 1 are The convex portion 1a protruding from the end surface of the other pipe base 1 is fitted into the concave portion 1b formed on the end surface of the one pipe base 1 (recessed and convex fitting) to be connected to each other.

When a plurality of pipe bases 1 are connected in a straight line as described above, a plurality of large holes 2 are formed as shown in FIG.
As in the first embodiment, the pipe lining materials 9 and 10 of different sizes are fluidized in the main pipe passage 7 formed by connecting a plurality of small holes 3 and the cable passage passage 8 formed by connecting a plurality of small holes 3. The passages 7 and 8 are lined at their inner peripheral walls by the pipe lining materials 9 and 10 because they are inverted and inserted by pressure and hardened. Therefore, also in this embodiment, the same effect as that of the first embodiment can be obtained.

<Third Embodiment> Next, a third embodiment of the present invention will be described with reference to FIG.

FIG. 9 is a longitudinal sectional view of the pipe base 11 and the conduit 20 installed therein. A recess 11a having a semicircular cross section is formed on the upper surface of each pipe base 11, and the recess 11 is formed.
Two small holes 13 for cable passage are provided at both lower ends of a in the longitudinal direction (direction perpendicular to the paper surface of FIG. 9).

When laying the pipeline, the first
Similarly to the second embodiment, a plurality of pipe bases 11 are aligned and connected in a straight line, and a pipe 20 is installed and laid in the recess 11a as illustrated. Further, in the cable passage 18 formed by connecting a plurality of small holes 13, a pipe lining material (not shown) is reversely inserted by fluid pressure and then cured as in the first and second embodiments. The passage 18 for cable passage is integrated by lining the inner peripheral surface thereof with a pipe lining.

Therefore, in this embodiment as well, even if a slight step is formed in the connecting portion of the pipe base 11, the passage 18 for the cable passage in which the pipe lining material is continuous is ensured.
There is no problem such as disconnection of a cable (not shown) passed through the cable passage 18.

<Fourth Embodiment> Next, a fourth embodiment of the present invention will be described with reference to FIG.

FIG. 10 is a vertical cross-sectional view of a U-shaped groove. The U-shaped groove is formed by connecting a plurality of pipe bases 21 in a straight line, and each pipe base 21 has a U-shaped groove 21a. Along the vertical direction (the direction perpendicular to the plane of FIG. 10),
Below the groove 21a, a small hole 1 for passing a cable of different diameters
Similarly, 2 and 24 are provided so as to extend in the longitudinal direction.

When laying the U-shaped groove, a plurality of pipe bases 21 are aligned and connected in a straight line as in the first to third embodiments, and a plurality of small holes 23, 24 are connected. The formed cable connection 28, 29 has a first
As in the third embodiment, the pipe lining material (not shown) is reversely inserted by fluid pressure and then hardened, and the cable passages 28 and 29 are integrated by lining their inner peripheral surfaces with the pipe lining material. To be done.

Therefore, also in this embodiment, it is possible to surely prevent the occurrence of troubles such as disconnection of the cables (not shown) passed through the cable passages 28 and 29. FIG.
At 0, 30 is a lid that covers the upper surface of the groove 21a.

[0035]

As is apparent from the above description, according to the present invention, after connecting a plurality of pipe bases formed by penetrating at least a small hole for cable passage in the length direction in the length direction, , A pipe lining material impregnated with a curable resin is reversely inserted into the small hole by fluid pressure, and the pipe lining material is pressed against the inner peripheral wall of the small hole to cure the curable resin impregnated therein. Since it is made possible, a continuous cable passage can be formed at the same time as the work of laying the pipeline in the ground, and it is possible to reliably prevent disconnection of the cable passed through the cable passage. The effect of being able to be obtained is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a pipe base used in a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state before connection of the pipe base used in the first embodiment of the present invention.

FIG. 3 is a sectional view of a connecting portion of a pipe base used in the first embodiment of the present invention.

FIG. 4 is an enlarged detailed view of a portion A of FIG.

FIG. 5 is a cross-sectional view showing a lining operation for the pipe base used in the first embodiment of the present invention.

FIG. 6 is a perspective view of a pipe base used in a second embodiment of the present invention.

FIG. 7 is a perspective view of a pipe base used in a second embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a lining operation for a pipe base used in the second embodiment of the present invention.

FIG. 9 is a vertical cross-sectional view of a pipe base and a pipeline installed therein according to a third embodiment of the present invention.

FIG. 10 is a vertical sectional view of a U-shaped groove showing a fourth embodiment of the present invention.

[Explanation of symbols]

 1 pipe base 1a convex part 1b concave part 2 large hole for main pipe 3 small hole for cable passage 4,5 pipe joint 7 passage for main pipe 8 passage for cable passage 9,10 pipe lining material 11,21 pipe base 13,23, 24 Small hole for cable passage 18, 28 Cable passage

Claims (5)

[Claims] 1. A pipe lining material formed by impregnating a curable resin after connecting a plurality of pipe bases formed by penetrating small holes for cable passage in at least the length direction and impregnating a curable resin. A pipe laying method, wherein the pipe lining material is reversely inserted into the hole by fluid pressure and the curable resin impregnated in the pipe lining material is cured while the pipe lining material is pressed against the inner peripheral wall of the small hole. 2. A pipe formed by forming a large hole for a main pipe in a longitudinal direction at a central portion of each pipe base, connecting a plurality of pipe bases in the longitudinal direction, and impregnating a curable resin. The lining material is reversely inserted into the small hole and the large hole by fluid pressure, respectively, and the curable resin impregnated in each pipe lining material is pressed while each pipe lining material is pressed against each inner peripheral wall of the small hole and the large hole. The pipeline laying method according to claim 1, characterized in that it is cured. 3. The pipeline laying method according to claim 1, wherein the plurality of pipe bases are connected by a pipe joint fitted in the small hole. 4. The pipeline laying method according to claim 2, wherein the plurality of pipe bases are connected by pipe joints fitted in the small holes and the large holes, respectively. 5. A projection is provided at one end of each pipe base,
The pipeline laying method according to claim 1 or 2, wherein a recess is formed at each of the other ends, and adjacent pipe bases are connected by recessed fitting.