JP2000291835A - Connection structure between underground structures and pipelines - Google Patents

Abstract

(57) [Abstract] [Problem] It has a simple structure and is excellent in workability. A side wall of a handhole has a side wall.
1 are integrally provided.
The connection member 30 has a cylindrical connection main body 31 and an inner end and an outer diameter larger than the connection main body 31 and concentric with the connection main body 31 at an end of the connection main body 31 on the inner side of the handhole 10. And a body pipe 21 constituting an end of the buried conduit 20 is inserted into and joined to the connection main body 31. In the collar 33 of the connecting member 30, fixing plates 42 to which ends of six sheath pipes 40 laid in the buried pipe 20 are respectively fitted are fitted.
It is fixed to 0.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between an underground structure such as a handhole and a manhole, a buried conduit buried underground, and an internal conduit laid in the buried conduit. .

[0002]

2. Description of the Related Art Recently, in a buried pipeline buried underground,
A sheath pipe is laid as an internal pipe, and a communication cable, a power cable, and the like are inserted into the sheath pipe. In this case, the end of the buried pipeline is fixed to an underground structure such as a manhole or a handhole, and the end of the sheath pipeline laid inside the buried pipeline is also an underground structure. Need to be fixed to The connection structure of the buried pipeline and the sheath pipeline to the underground structure is disclosed in, for example, Japanese Utility Model Registration No. 3049157.

FIG. 3 shows an example of a connection structure of a buried pipeline and a sheath pipeline to an underground structure. In this connection structure,
The end of the buried conduit 50 is connected to a hollow rectangular parallelepiped handhole 10 provided in the ground for connecting cables and performing maintenance and inspection work. An opening 11 a is provided in the side wall 11 of the handhole 10, and a duct sleeve 52 forming the buried conduit 50 is provided in the opening 11 a.
Are connected. The duct sleeve 52 is disposed so as to protrude from the hand hole 10, and the end of the body tube 51 constituting the buried conduit 50 has a rubber ring 56 fitted to the end of the duct sleeve 52. Are slidably connected. A plurality of body tubes 51 constituting the buried conduit 50 are sequentially connected to the duct sleeve 52 in the axial direction. Buried pipeline 50
Inside, a sheath conduit 62 through which an optical fiber cable 61 is inserted is laid.

[0004] A flange 52 a is provided at the base end of the duct sleeve 52, and the flange 52 a is attached to the inner surface of the side wall 11 of the handhole 10 by a bolt 53. Side wall 11 of handhole 10
A mortar material 54 is filled between the opening 11 a provided in the first and the duct sleeve 52. Duct sleeve 5 protruding outside from side wall 11 of hand hole 10
The two parts are covered by protective concrete 55.

[0005] A fixing plate 6 for fixing an end of a sheath conduit 62 passing through the buried conduit 50 is provided in an end of the duct sleeve 52 located in the opening 11 a of the handhole 10.
3 are provided. The fixed plate 63 has a pair of disk-shaped plate members 63a and a ring-shaped elastic body 63b arranged between outer peripheral edges of both plate members 63a, and the elastic body 63b bulges outward. As a result, both plate members 63a are fixed close to each other. And the elastic body 6
3b is pressed against the inner peripheral surface of the duct sleeve 52 so that the fixing plate 63
Is fixed inside.

[0006]

In such a connection structure, the mortar material is inserted into the opening 11a with the flange portion 52a of the duct sleeve 52 attached to the side wall 11 of the handhole 10 by the bolt 53. It is necessary to provide a protective concrete 55 which fills the duct sleeve 52 and covers the duct sleeve 52, and there is a problem that the work is not easy. In particular, since the flange portion 52a is provided in the duct sleeve 52, the opening 11a of the side wall 11 in which the mortar material 54 is filled is covered with the flange portion 52a. Not easy. Moreover, the filled mortar material 54
There is also a problem that it takes a long time to cure the oil and the working efficiency is poor.

The fixing plate 63 is connected to the duct sleeve 52.
Is attached to the handhole 10, and the body tube 51 is slidably joined to the duct sleeve 52. Then, the pair of plate members 6 are placed in the narrow handhole 10.
The elastic body 63b is expanded by bringing the 3a close to each other, thereby fixing the elastic body 63b in the duct sleeve 52, and there is a problem that the work is not easy.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a connection structure between an underground structure and a pipeline having a simple structure and excellent workability. .

[0009]

According to the present invention, a connection structure between an underground structure and a pipeline according to the present invention includes an underground structure, a buried pipeline buried in the ground, and an interior laid in the buried pipeline. A connection structure with a pipeline, a cylindrical connection main body penetrating the side wall of the underground structure, and an end of the connection main body on the inner side of the underground structure, A connection member having a large inner diameter and an outer diameter and having a collar provided concentrically with the connection main body is integrally attached to a side wall of the underground structure in advance, and the connection member is embedded in the connection main body of the connection member. The end of the conduit is inserted and joined, and a fixing plate to which the end of the internal conduit is attached is fitted and fixed in the collar of the connecting member.

[0010] A step is provided between the connecting body of the connecting member and the collar, the step being in contact with the fixing plate, and a bolt for fixing the fixing plate is screwed to the step. Screw holes are provided.

[0011]

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

FIG. 1 is a sectional view showing an example of an embodiment of a connection structure between an underground structure and a pipeline according to the present invention. In this connection structure, each of the handhole 10 which is an underground structure, the end of the buried pipeline 20, and the six sheath pipelines 40 as internal pipelines laid in the buried pipeline 20. The ends are connected to each other. An optical fiber cable is inserted into each of the sheath conduits 40.
The handhole 10 is a hollow rectangular parallelepiped concrete structure buried in the ground in order to perform a connection operation, a maintenance inspection operation, and the like of an optical fiber cable inserted into each of the sheath tubes 41.

The buried conduit 20 and each sheath conduit 40 are shown in FIG.
Is laid between the hand hole 10 shown in FIG. 1 and another hand hole arranged at an appropriate distance from the hand hole 10. The buried conduit 20 and each sheath conduit 40 are connected to a duct sleeve forming an end of the buried conduit 20 in another handhole 10, and are connected to a sheath tube constituting an end of each sheath conduit 40. The duct sleeves are connected to each other, the body tubes 21 constituting the buried conduit 20 are sequentially connected to the duct sleeves, and the sheath tubes 41 constituting the respective sheath conduits 40 are respectively connected to the respective duct sleeves for the sheath tube. Are sequentially connected. In this case, the connection between the body tube 21 constituting the buried conduit 20 and the sheath tube 41 constituting each of the sheath conduits 40 is alternately performed. Then, as shown in FIG. 1, the body pipe 21 forming the end of the buried pipe 40 is
Are connected to the handhole 10, and the ends of the sheath tubes 41 constituting the respective sheath conduits 40 are connected to the handhole 10.

Each body pipe 21 constituting the buried conduit 20
Is provided with a receptacle at one end, and an insertion port at the other end of the other body tube 21 where the receptacle is not provided is inserted and connected to the receptacle. A large number of ribs 21a, each of which protrudes outward along the circumferential direction, are provided on the outer peripheral surface of the body tube 21 at equal intervals in the axial direction.

The handhole 10 is made of concrete in a predetermined hollow rectangular parallelepiped in advance at a factory, and is brought into the site.
When the handhole 11 is manufactured in a factory, the side wall 11 of the “0” is provided with a connecting member 30 integrally attached thereto. The connection member 30 has a cylindrical connection body 31 into which the end of the body tube 21 is inserted and connected. The connection body 31 is provided on the side wall 11 of the handhole 10.
And is concentric with a cylindrical opening 11a provided so as to penetrate the side wall 11, and is arranged so that one end protrudes from the side wall 11 to the outside. I have.

At the end of the connection body 31 located inside the handhole 10, a thick step portion 3 protruding outward is provided.
2 is provided concentrically with the connection main body 31, and a short cylindrical collar 33 is provided concentrically with the connection main body 31 following the step 32. This color 33
Are larger than the outer diameter and the inner diameter of the connection body 31, respectively, and the outer diameter of the collar 33 is equal to the outer diameter of the step portion 32. The end face of the collar 33 is connected to the handhole 10 to which the connecting member 30 is attached.
Are flush with the inner side surface of the side wall 11 and open toward the inside of the handhole 10. Color 33
The disk-shaped fixing plate 42 attached to each of the sheath tubes 41 forming the six sheath tube channels 40 via the sheath tube duct sleeve 44 is fitted into the inside of the tube. I have.

Such a connecting member 30 is attached integrally with the handhole 10 when the handhole 10 is manufactured in a factory. The connection member 30 has an opening 11 provided in the side wall 11 such that an opening end face of the collar 33 is flush with an inner side surface of the side wall 11 of the handhole 10.
a and is fixed concentrically in the mortar 12. The end of the connection main body 31 located on the opposite side to the end where the step portion 32 is provided protrudes outside from the side wall 11 of the hand hole 10, and the connection member 30 penetrates the side wall 11 of the hand hole 10. It is attached in the state where it was done.

An end of the body tube 21 is inserted into and joined to an end of the connection body 31 of the connection member 30. At the end of the body tube 21 inserted into the connection main body 31 of the connection member 30, an annular bonding member 22 pressed against the inner peripheral surface of the connection main body 31 in a watertight manner is provided with a pair of adjacent ribs 21a. They are fitted in a state sandwiched between them. The joining member 22 is formed of an elastic rubber ring or the like.

FIG. 2 is a front view of the connecting member 30. Six screw holes 34 each having a thread groove on the inner peripheral surface thereof are provided in the stepped portion 32 disposed in the inner back portion of the collar 33, respectively, in a state along the axial direction of the connection main body portion 31. They are provided at equal intervals in the circumferential direction. Each screw hole 3
4 open into the collar 33 respectively.

The fixing plate 42 to which the six sheath tube duct sleeves 44 are attached is formed in a disk shape that can be fitted concentrically into the collar 33 of the connecting member 30. And is brought into contact with the step portion 32.

The connecting member 30 is attached to the outer peripheral edge of the fixing plate 42.
Six bolt insertion holes 42a are provided at equal intervals in the circumferential direction so as to face the respective screw holes 34 provided in the connection main body 31 of FIG. A bolt 43 is inserted into each of the bolt insertion holes 42a.
Are screw-coupled to respective screw holes 34 provided in the flange portion 32 of the connection member 30.

The handhole 10 manufactured at the factory with the connecting member 30 attached to the side wall 11 is transported to a predetermined installation site and installed. Then, the end of the buried conduit 20 and the respective ends of the six sheath conduits 40 are connected to other handholes, respectively, and thereafter, the connection between the body pipe 21 and the other body pipe 21 is performed. And the six sheath tubes 41
The connection with each of the other six sheath tubes 41 is sequentially repeated, and the buried pipeline 20 and each of the sheath pipelines 40 are sequentially constructed. Then, the body tube 21 constituting the end of the buried conduit 20 and the sheath tubes 41 constituting the end of each of the sheath conduits 40 are respectively attached to the handhole 10 installed underground.

In this case, a pair of ribs 21a provided at the insertion portion of the body tube 21 connected to the handhole 10 are provided.
The annular joining member 22 is fitted between the joining members 2 and
The insertion opening of the body tube 21 into which the fitting 2 is fitted is inserted into the connection main body 31 of the connection member 30 attached to the side wall 11 of the handhole 10. The body tube 21 is joined to the connecting body 31 of the connecting member 30 by pressing the joining member 22 formed of a rubber ring or the like against the inner peripheral surface of the connecting body 31 of the connecting member 30.
In addition, the joining member 22 is pressed against the inner peripheral surface of the connection body 31 of the connection member 30 to seal the connection between the connection body 31 and the body tube 21 in a watertight manner.

Body tube 21 inserted into connection member 30
When the end reaches the inside of the collar 33 through the connection main body 31, that part is cut. Therefore, when connecting the final end of the buried pipeline 20 to the handhole 10, a slide tube or the like for adjusting the length of the buried pipeline 20 becomes unnecessary.

On the other hand, the fixing plates 42 form the respective duct sleeves 44 for the respective sheath pipes, which constitute the respective ends of the six sheath pipe channels 40.
Is fitted into the collar 33 of the connecting member 30, and each of the sheath tube duct sleeves 44 and each of the sheath tubes 4 are attached.
1 are connected to each other. Then, with the fixing plate 42 abutting against the end face of the step portion 32, the bolts 43 are inserted into the respective bolt insertion holes 42a provided in the fixing plate 42, and the bolts 43 It is screwed into the screw hole 34. Thus, the six sheath conduits 4
The fixing plate 42 to which each of the ends 0 is attached is attached to the connecting member 30 integrated with the handhole 10.

[0026]

As described above, according to the connection structure of the present invention, the end of the buried conduit is connected to the connection member previously attached to the underground structure, and the connection member is connected to the sheath pipe. Since the fixing plate to which the end of the road is attached is attached, the construction work at the site is easy and the construction period can be shortened.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of an embodiment of a connection structure between an underground structure and a pipeline according to the present invention.

FIG. 2 is a front view of a connection member used for the connection structure.

FIG. 3 is a cross-sectional view showing an example of a conventional connection structure between an underground structure and a pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hand hole 11 Side wall 11a Opening 12 Mortar 20 Buried conduit 21 Body pipe 22 Joining member 30 Connecting member 31 Connection main body part 32 Step part 33 Collar 34 Screw hole 40 Sheath pipe 41 Sheath pipe 42 Fixing plate 43 Bolt 44 Sheath pipe Sleeve duct

Claims (2)

[Claims] 1. A connection structure between an underground structure, a buried pipeline buried in the ground, and an internal pipeline laid in the buried pipeline, wherein the cylinder penetrates a side wall of the underground structure. Shaped connection body,
A connection member having a collar whose inner diameter and outer diameter are larger than the connection body and are provided concentrically with the connection body at an inner end of the underground structure in the connection body. The end of the buried conduit is inserted and joined into the connecting body of the connecting member, and the end of the internal conduit is inserted into the collar of the connecting member. A connection structure between an underground structure and a pipeline, wherein a fixing plate to which the underground structure is attached is fitted and fixed. 2. A step portion for contacting the fixing plate is provided between the connection main body portion of the connection member and the collar, and a bolt for fixing the fixing plate is provided on the step portion. The connection structure between an underground structure and a pipeline according to claim 1, wherein a screw hole to be screw-connected is provided.