JP2003129507A - Connecting structure between manhole and sewage main - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure between a manhole and a sewage main capable of increasing relative displacement of a connecting section between a side wall of the manhole and the sewage main and, facilitating the work from the inside of the manhole. SOLUTION: The connecting structure between the manhole 1 and the sewage main 2 capable of ensuring a free movement of a free fitting section inserted by freely fitting an insertion section 21 of the sewage main 2 into a mounting hole 13 bored in the side wall 11 of the manhole and, connecting the free fitting section in a water-right state puts on a cylinder section 31 fitted to the insertion section 21 of the sewage main from the outside and adhered thereto with an adhesive 4 and a joint 3 consisting of a collar section 32 equipped with an abutting surface 33 formed in the end of the cylinder section 31, approaching an interior wall surface 14 of the manhole 1 and a packing 5 mounted on the abutting surface 33 by surrounding the cylinder 31.

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 a manhole for sewerage and a sewer main with a gap provided at a connection portion between the manhole for sewerage and a main sewer connected to a side wall of the manhole.

[0002]

2. Description of the Related Art Plastic pipes such as vinyl chloride, centrifugal reinforced concrete pipes (fume pipes), and sewage main pipes such as porcelain pipes are connected to the side wall of a sewer manhole that serves as a rainwater or sewage system. In the conventional connection structure between a manhole and a main sewer, the main sewer is fixed to the manhole with a material having a small elasticity such as mortar, or is connected with a sealing material having a limited elastic deformation. For this reason, loads such as shearing force, pulling force, compressive force, and torsional force are applied to the connection part due to earthquakes, crustal movements, and heavy vehicles passing over the buried position of the sewage mains. There was a problem that the connection part of the pipe to the manhole was damaged, the edge of the sealing surface was cut off, and infiltration water occurred.

As shown in FIG. 13, the connection of the main sewer pipe is performed by loosely fitting an end portion (insertion portion) 21 into a mounting hole 13 formed in a side wall 11 of a sewer manhole 1 so that the inside of the mounting hole 13 is An annular gap 20 is formed between the circumference and the outer circumference of the insertion portion 21 of the main sewer pipe 2, and a rubber boot B is fastened in a watertight manner. The boot B has one end fastened to the inner wall of the mounting hole 13 with a fastening ring C and the other end fastened to the outer periphery of the insertion portion 21 with a fastening band D.

[0004]

In this structure, since the void S is formed inside the boot B, the void S is filled with the mortar M to prevent the solid matter from invading and accumulating, and to improve the appearance of the construction. It prevents the decline. Therefore, there is a problem that the tolerance for the displacement required by the loose fitting portion is reduced.

An object of the present invention is to increase the relative displacement between the side wall of the manhole and the connection between the sewer main and
It is to provide a connection structure between a manhole and a sewer main pipe, which can be easily installed from the inside of the manhole.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an end portion (insertion portion) of a sewer main pipe is loosely fitted into a mounting hole provided in a side wall of a manhole to allow relative displacement, and the loose fitting portion is watertight. A connection structure for connecting a manhole connected to a sewage pipe and a sewer main pipe, wherein the loose fitting portion is provided with a tubular portion that is externally fitted and bonded to the end portion, and a contact surface that abuts an inner wall surface of the manhole. It is characterized in that a joint including a collar portion and a packing attached to the corresponding contact surface so as to surround the tubular portion is installed.

[0007]

According to the present invention, there is provided a tubular portion which is externally fitted and bonded to the end portion of the main sewer pipe, and a flange portion which is formed at the tip of the tubular portion on the center side of the manhole and extends along the inner wall of the manhole. A joint consisting of a packing attached to the outer surface of the manhole of the collar portion so as to surround the tubular portion is adhered to the end of the sewer main and pressed against the inner wall of the manhole.

Therefore, the sewer main can be displaced in a large range with respect to the side wall of the manhole. As a result, due to earthquakes, crustal movements, and loads caused by heavy vehicles passing over the buried location of the sewer main, the connection of the sewer main to the manhole may be damaged or the sealing surface may be cut off. It can be effectively prevented.

According to the second aspect of the invention, since the sewer main pipe and the joint are made of plastic such as vinyl chloride, they can be easily bonded.

In the invention according to claim 3, the main sewer is
Centrifugal force is a reinforced concrete pipe or a ceramic pipe, the joint is made of plastic such as vinyl chloride, and a plastic collar such as vinyl chloride is fastened to the end of the main sewer pipe, and the collar and the tubular portion are fitted together. It is characterized by being bonded. Therefore, the joint made of plastic can be easily bonded and connected to the sewer main of a different material.

According to the fourth aspect of the invention, a seal ring is provided on the fitting surface between the cylindrical portion and the end portion to improve the watertightness.

According to a fifth aspect of the present invention, there is provided a connection structure for connecting a manhole and a sewer main pipe, which allows relative displacement by loosely fitting an end portion of the sewer main pipe into a mounting hole provided on a side wall of the manhole. A joint including a tubular portion externally fitted to the end portion and a flange portion having a contact surface that abuts on an inner wall surface of the manhole is installed in a loose fitting portion between the mounting hole and the end portion. With this configuration, it is possible to effectively prevent the trouble that the connection part of the main sewer pipe to the manhole is damaged or the sealing surface is cut off at a place where watertightness is not necessary or important.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The first embodiment of the present invention shown in FIGS.
Description will be given together with examples. The sewer manhole 1 is a concrete structure that constitutes a rainwater chamber or a wastewater chamber, and has a cylindrical side wall 11 and a flat bottom wall 12. Side wall 11
A mounting hole 13 is drilled in a circular shape in the lower part of, and an insertion portion 21 which is an end portion of the main sewer 2 is loosely fitted therein.

A circular vinyl chloride pipe is used as the main sewer pipe 2, and an annular gap 20 is formed between the outer periphery of the insertion portion 21 and the inner periphery of the mounting hole 13, and the annular gap 20 is formed in the insertion portion 21.
A joint 3 made of vinyl chloride for watertightly closing the manhole 1 side is adhered by an adhesive 4. In addition,
The joint 3 may be made of plastic other than vinyl chloride.

As shown in FIG. 2, the joint 3 is composed of a tubular portion 31 fitted onto the insertion portion 21 and a flange portion 32 provided at the end of the tubular portion 31 on the center side of the manhole. Collar part 32
The outer surface of the manhole is a contact surface 33 that contacts or approaches the inner wall surface 14 of the side wall 11. Abutment surface 3
3, a groove 34 is formed concentrically with the tubular portion 31,
A rubber packing 5 is fitted in the groove 34. In the joint 3, the tubular portion 31 is externally fitted to the insertion portion 21 and adhered and fixed thereto, and the packing 5 is pressed against the inner wall surface 14 to maintain watertightness.

3 to 6 show the steps of constructing the connection structure of the manhole 1 and the main sewer 2 of the present invention. As shown in FIG. 3, the mounting hole 13 is drilled in the side wall 11 of the manhole 1, and the insertion portion 21 of the main sewer 2 is inserted concentrically. Next, as shown in FIG. 4, the outer periphery of the insertion portion 21 is cleaned to remove the cylindrical portion 31.
The joint 3 having the adhesive 4 applied to the inner peripheral surface thereof is externally fitted to the insertion portion 21.

Next, as shown in FIG. 5, a batten 41 is applied to the collar portion 32 from the inside, and is held for a certain period of time until the adhesive 4 is hardened by a jack or screw pressing means 42. When the adhesive 4 hardens and the batten 41 is removed, the tubular portion 31 of the joint 3 is fixed to the insertion portion 21 of the main sewer pipe 2 as shown in FIG.

As a result, the connecting portion between the side wall 11 of the manhole 1 and the insertion portion 21 of the main sewer 2 can be modified so that the displacement amount becomes large. As a result, earthquakes, crustal movements,
Even if a load such as a shearing force, a pulling force, a compressing force, or a twisting force is applied to the connecting portion due to a heavy vehicle passing over the buried position of the sewage main 2, the manhole 1 of the sewage main 2
It is possible to prevent problems such as damage to the connection part to the front end, breakage of the sealing surface edge, and water infiltration.

FIG. 7 shows a second embodiment of the present invention. In this embodiment, since the main sewer pipe 2 is a fume pipe, the joint 3 made of plastic such as vinyl chloride cannot be directly bonded. Therefore, fix the collar 6 made of plastic such as vinyl chloride on the outer periphery of the insertion portion 21,
The tubular portion 31 of the joint 3 is externally fitted to the collar 6 and the fitting portion is bonded.

In this embodiment, the collar 6 includes brackets 62, 62 at both ends of semi-cylindrical bodies 61, 61 obtained by dividing a cylinder into two.
Is provided, and the brackets 62, 62 are butted against each other,
It is fastened with a fastener 63 composed of a nut. With this configuration, the same effect as that of the first embodiment can be obtained. A waterproof ring may be provided between the collar 6 and the outer circumference of the main sewer pipe 2.

FIG. 8 shows a third embodiment of the present invention. In this embodiment, a notch groove 35 is formed outside the outer peripheral edge of the collar portion 32 of the joint 3. This notch groove 35 is
After the joint 3 is attached, a sealing material 7 such as mortar, water-stopping mortar, or rubber packing is filled. As a result, in addition to the packing 5, the sealing material 7 provides a water blocking effect. Watertightness may be ensured only by the sealing material 7 instead of the packing 5.

FIG. 9 shows a fourth embodiment of the present invention. The packing 5A has a rectangular cross section, and has a circumferential projection 51 on the contact surface with the side wall 11. The ridge 51 improves the sealing property. The packing 5B has a lip 52 in the circumferential direction. The packing 5 may be formed of butyl rubber having adhesiveness or water-expandable rubber.

FIG. 10 shows a fifth embodiment of the present invention.
In this embodiment, a corrugation 36 is provided concentrically on the inner peripheral side of the collar portion 32 of the joint 3. Thereby, the inner circumference of the collar portion 32 can be deformed in accordance with the axial displacement of the sewer main pipe 2, and the contactability of the collar portion 32 to the inner wall surface 14 is maintained. As a result, it becomes easy to maintain water tightness.

FIG. 11 shows a sixth embodiment of the present invention.
In this embodiment, a groove 37 is formed on the inner circumference of the tubular portion 31 of the joint 3 and / or the outer circumference of the insertion portion 21, and a waterproof seal ring 38 is fitted therein. The waterproof seal ring 38 has the function of improving the water tightness between the outer periphery of the insertion portion 21 of the main sewer 2 and the tubular portion 31.

FIG. 12 shows a seventh embodiment of the present invention.
In this embodiment, the adhesive 4 and the packing 5 are omitted. With this structure, the structure of the joint 3 is simple and can be manufactured at low cost, and the construction is easy. Therefore, it is suitable for applications in which watertightness is not necessary or watertightness is low.

[Brief description of drawings]

FIG. 1 is a sectional view showing a connection structure between a manhole and a main sewer pipe of the present invention.

FIG. 2 is a side view and a plan view of a joint.

FIG. 3 is a process drawing of the present invention.

FIG. 4 is a construction process diagram of the present invention.

FIG. 5 is a construction process diagram of the present invention.

FIG. 6 is a construction process diagram of the present invention.

FIG. 7 is a sectional view and a side view of the second embodiment.

FIG. 8 is a sectional view of a third embodiment.

FIG. 9 is a sectional view of a fourth embodiment.

FIG. 10 is a sectional view of a fifth embodiment.

FIG. 11 is a sectional view of a sixth embodiment.

FIG. 12 is a sectional view of a seventh embodiment.

FIG. 13 is a perspective view showing a conventional connection structure between a manhole and a main sewer pipe.

[Explanation of symbols]

1 manhole 11 Side wall 13 mounting holes 2 Sewage main 20 annular gap 21 Insertion part (end part) 3 joints 31 tube 32 Collar 33 Contact surface 38 Waterproof Seal Ring 4 adhesive 5 packing 6 colors

Claims (5)

[Claims] 1. The relative displacement is allowed by loosely fitting the end of the main sewer into a mounting hole provided in the side wall of the manhole,
A connecting structure for connecting a loose fitting portion in a watertight manner to a sewer main pipe, wherein the loose fitting portion has a tubular portion that is externally fitted and bonded to the end portion.
A manhole and a sewer main, characterized in that a joint composed of a collar portion having an abutting surface that abuts an inner wall surface of the manhole and a packing attached around the tubular portion is attached to the abutting surface. Connection structure. 2. The connection structure for a manhole and a sewer main according to claim 1, wherein the sewer main and the joint are made of plastic. 3. The connection structure between a manhole and a sewer main according to claim 1, wherein the sewer main is a centrifugal reinforced concrete pipe or a ceramic pipe, and the joint is made of plastic. A connection structure between a manhole and a sewer main, characterized in that a plastic collar is fastened to an end of the pipe, and the collar and the tubular portion are fitted and adhered to each other. 4. A manhole according to claim 1, wherein the manhole is connected to the main sewer pipe, and a seal ring is provided on a fitting surface between the tubular portion and the end portion. Connection structure with the main sewer. 5. A connection structure between a manhole and a sewer main pipe, which allows relative displacement by allowing an end portion of the sewer main pipe to be loosely fitted in a mounting hole provided in a side wall of the manhole, wherein the mounting hole and the end portion. A manhole and a sewage book, characterized in that a joint consisting of a tubular part to be externally fitted to the end part and a brim part having an abutment surface abutting against an inner wall surface of the manhole is installed in a loose fitting part of Connection structure with pipe.