JP2003090077A - Connecting construction between manhole and sewer main pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting construction between a manhole 1 and a sewer main pipe 2 which is able to greatly displace a sewer main pipe 2 relative to the manhole 1 and also able to provide a watertight elastic connection between the sewer main pipe 2 from the inner side of the manhole 1 and a connecting hole made in the manhole 1. SOLUTION: An inserting portion 21 of the sewer main pipe 2 is loosely fitted to an attaching hole 12 provided in a side wall 11 of the manhole 1 and this is a connecting construction between the manhole 1 and the sewer main pipe 2 for making a watertight connection for a ring-shaped gap 20, and has a joint pipe 3 having a diameter smaller than an attaching hole and larger than the sewer main pipe 2, and one end is hardly adhered watertight to one end of the joint pipe 3 with an inner diameter externally fitted to an inserting portion 21, an assembly body 30 with a boot 4 forming a cylindrical gap 10 to the inner periphery of the joint pipe 3 is inserted from the inside of the manhole 1 to the ring-shaped gap 20, other end of the boot 4 and the other end 22 of the inserting portion 21 are hardly adhered watertight, and mortar 5 is filled in the ring-shaped gap 20 between the attaching hole 12 and the joint pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for elastically connecting a sewer main to a side wall of a sewer manhole in a watertight manner, and particularly to a manhole and a sewer main that can be installed from inside the manhole. Regarding connection structure.

[0002]

2. Description of the Related Art Centrifugal reinforced concrete pipes (also called fume pipes), sewage main pipes such as ceramic pipes or vinyl chloride pipes are connected to the side walls of a sewer manhole which serves as a rainwater chamber or a wastewater chamber. To connect this sewer main, insert the tip of the sewer main into the mounting hole drilled in the side wall of the sewer manhole, and insert it between the inner circumference of the mounting hole and the outer circumference of the tip of the sewer main. It was watertightly filled with a fixing material such as mortar.

When an external force is applied to the connecting portion between the manhole and the main sewer pipe due to an earthquake or vibration due to a heavy vehicle, the mortar and the like at the connecting portion is damaged and the sealing performance is impaired, causing sewage leakage. Therefore, as shown in FIG. 18, between the inner circumference of the mounting hole 12 formed in the side wall 11 of the manhole 1 and the outer circumference of the end portion (insertion portion 21) of the sewer main 2, a cylindrical rubber-based elastic material is provided. There has been proposed an elastic connection structure in which a sewer main 2 is displaced with respect to a manhole 1 by connecting them with a seal member (boot) A and fixing them with a fastening band B and a wedge C, and elastically connecting them.

[0004]

In recent years, the propulsion method (shielding method) has been widely adopted for burying the sewer main 2,
The size of the vertical shaft 1A to be dug to install the manhole 1 is small from the viewpoint of efficiency. For this reason, the gap between the earth retaining sheet pile 1B of the vertical shaft 1A and the side wall 11 of the manhole 1 is narrow, and it is difficult for the builder F to enter the vertical shaft 1A and perform the connection work between the manhole 1 and the sewer main 2. It has become.

It is an object of the present invention to provide a connection structure for a manhole and a sewer main, which facilitates a watertight elastic connection between the inside of the manhole and the connection hole formed in the manhole. It is in.

[0006]

According to a first aspect of the present invention, an insertion portion, which is an end portion of a sewer main, is loosely fitted into a mounting hole formed in a side wall of a manhole, and the mounting hole and the insertion hole are inserted. A connection structure of a manhole and a sewer main that water-tightly connect an annular gap with a section, a joint pipe having a diameter smaller than the mounting hole and larger than the sewer main, and one end of the joint pipe An assembly with a boot that is watertightly fixed to one end and has an inner diameter that is externally fitted to the insertion portion and that forms a cylindrical space with the inner circumference of the joint pipe is provided from inside the manhole. Insert one end of the assembled body into the annular gap first, fix the other end of the boot and the other end of the insertion portion in a watertight manner, and fill the annular gap between the mounting hole and the joint pipe with a filler. It is characterized by filling.

[0007]

According to the invention described in claim 1, a mounting hole having a diameter larger than that of the main sewer is bored from the inside of the manhole, and the end (insertion portion) of the main sewer is inserted into the mounting hole from the outside of the manhole.
Plug in. Next, the assembly of the joint pipe and the boot is inserted into the annular gap between the mounting hole and the insertion portion from the inside of the manhole, and the other end of the boot is watertightly fixed to the other end of the sewer main by the fixing means. Further, the filling material is filled from the inside of the manhole into the annular gap between the mounting hole and the joint pipe.

[0008]

As a result, all the work of installing a manhole in a narrow shaft and elastically connecting the sewer mains can be performed from within the manhole, and the construction is easy. Further, since the insertion portion of the sewage main is elastically held in the joint pipe fixed to the mounting hole via the boot and the tubular space, the sewage 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 present invention, one end of the boot has a flange portion and a tubular edge portion extending an outer edge of the collar portion to the other end side, and the tubular edge portion is externally attached to one end of the joint pipe. It is characterized by fitting. With this configuration, one end of the boot and one end of the insertion portion can be accurately and concentrically arranged, and the cylindrical space can be formed uniformly over the entire circumference and the entire length. For this reason, the allowable relative displacement with respect to the manhole can be increased even with respect to the load in which the sewer main moves in the axial direction, which is effective in preventing damage to the connection part of the sewer main to the manhole due to an earthquake or the like.

According to the third aspect of the invention, one end or the other end of the boot is fixed by the fastening band. The fastening band is made of stainless steel, and is externally fitted to one end of the boot that is fitted to one end of the joint pipe, and the two are watertightly fixed by tightening a screw. The fastening band at the other end is loosened when the assembly is inserted, the assembly is inserted, and then the other end of the boot is fastened to the other end of the insertion portion.

According to the fourth aspect of the invention, the elastic ring is fitted on the other end side of the cylindrical space. With this elastic ring, it is possible to eliminate the problem that foreign matter such as dust is stuck in the cylindrical space.

According to the fifth aspect of the present invention, a notch for inserting a tightening tool is provided at the other end of the joint pipe. In order to prevent protrusion into the manhole, with the other end of the joint pipe,
The other end of the boot and the other end of the insertion portion are set to be substantially flush with the inner wall surface of the manhole. Therefore, it is difficult to insert a tightening tool when tightening the fastening band for water-tightly fixing the other end of the boot to the other end of the insertion portion. By forming the notch as in the present invention, the fastening operation of the fastening band can be easily performed.

The invention according to claim 6 is characterized in that the notch is closed with a waterproof member after tightening a fastening band for watertightly fixing the other end of the boot to the other end of the insertion portion. Fillers such as mortar are not completely waterproof, and a short-circuit inundation channel is likely to be formed over time through the notch. With this configuration, it is possible to prevent, for a long period of time, a problem that water from the filling material enters the manhole through the notch.

According to a seventh aspect of the present invention, the insertion portion, which is the end of the sewer main, is loosely fitted into the attachment hole provided in the side wall of the manhole, and the annular gap between the attachment hole and the insertion portion is watertight. The connection structure between the manhole and the main sewer pipe is connected to the annular gap, and a joint pipe with a diameter smaller than the mounting hole and a diameter larger than the main sewer pipe is inserted into the annular gap, and the manhole is placed between the joint pipe and the main sewer pipe. It is characterized in that an annular elastic packing is fitted from the inside to form a tubular space and sealing is performed, and a filling material is filled in an annular gap between the mounting hole and the joint pipe.

With this construction, the manhole is installed in a narrow shaft, and all the work of elastically connecting the sewer mains can be performed from within the manhole, so that the construction is easy. Also, since the insertion part of the sewage main is elastically held in the joint pipe fixed to the mounting hole via the tubular space supported by the annular elastic packing, the sewage main can be used in a large range with respect to the side wall of the manhole. Can be displaced.
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.

In the invention according to claim 8, an annular holding member is attached to one end of the joint pipe. This facilitates the work of fitting the joint pipe from the inside of the manhole into the annular gap between the mounting hole and the insertion portion while maintaining the concentricity with the insertion portion. Further, the cylindrical space can be made uniform over the entire circumference, and the work of inserting the annular elastic packing can be performed smoothly.

According to a ninth aspect of the present invention, the annular holding member is a foam resin ring attached to one end of the joint pipe. When the annular holding member is made of foamed resin, the strength is appropriate, the cost is low, and the practicality is high.

According to the tenth aspect of the present invention, the insertion portion, which is the end of the sewer main, is loosely fitted into the attachment hole provided in the side wall of the manhole, and the annular gap between the attachment hole and the insertion portion is watertight. A connecting structure for connecting a manhole and a main sewer pipe, wherein the annular gap has a smaller diameter than the mounting hole and a larger diameter than the main sewer pipe, and an annular holding member having an insertion portion and a sealing action at the tip. Insert a fitting pipe provided with it, and insert an elastic body from inside the manhole between the fitting pipe and the main sewer pipe to form a cylindrical space, and fill the annular gap between the mounting hole and the fitting pipe with filler. Is characterized by.

In this construction, the annular holding member secures the seal and concentricity between one end of the joint pipe and the main sewer pipe, and a plurality of elastic bodies form a cylindrical space. Therefore, as compared with the annular elastic packing, the plurality of elastic bodies can be easily inserted, and the cylindrical space can be formed with a simple tool.

According to the eleventh aspect of the invention, a locking member that engages with the inner wall of the manhole is provided at the other end of the joint pipe. Although the locking member is not an essential component of this invention,
With the locking member, there is an advantage that the assembly of the joint pipe and the boot can be appropriately and quickly inserted from the inside of the manhole into the annular gap between the mounting hole and the insertion portion. As described in the twelfth aspect, the locking member is inexpensive and highly practical if it is a locking plate provided one above and one below.

In a thirteenth aspect of the present invention, a resin layer is provided on the outer periphery of the joint pipe to improve compatibility with a filler such as mortar. As a result, the joint pipe can be firmly fixed to the mounting hole, and the durability of the seal is improved.

[0022]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the first invention according to claims 1 to 4 will be described with reference to FIGS. FIG. 1 shows a construction for installing a sewer manhole 1. The sewer manhole 1 is a reinforced concrete structure that constitutes a rainwater box or a sewage box, and is formed in a box shape in advance. The manhole 1 is installed by suspending it with a crane or the like in a shaft 1A dug in a setting place and earthed by a sheet pile 1B.
Subsequently, a substantially circular mounting hole 12 is drilled from the inside at a predetermined position on the side wall 11 of the manhole 1.

The main sewer pipe 2 is a water pipe such as a reinforced concrete pipe, a ceramic pipe or a vinyl chloride pipe, and has a circular cross section. The sewage main 2 is buried from the starting shaft dug away from the shaft 1A to a shield machine (neither is shown).
Then, while digging the side shaft, the sewer main 2 of a predetermined length is inserted into the side shaft. The sewage mains 2 are connected by a collar to advance the side shaft so that the tip projects to a set position in the shaft 1A.

The tip of the main sewer pipe 2 protruding into the vertical shaft 1A serves as an insertion portion 21 concentrically inserted into the mounting hole 12. A cylindrical annular gap 20 is formed between the mounting hole 12 and the insertion portion 21. To connect the manhole 1 and the main sewer pipe 2 of the present invention, as shown in FIG. 2, insert the assembled body 30 of the joint pipe 3 and the boot 4 into the annular gap 20 between the mounting hole 12 and the insertion portion 21. By.

The joint pipe 3 is made of stainless steel, iron or resin, has a smaller diameter than the mounting hole 12 and a larger diameter than the main sewer pipe 2, and has a total length somewhat longer than the thickness of the side wall 11. In this embodiment, as shown in FIG. 3, locking plates 32, 32 as locking members are vertically provided at the inner end (the other end) 31 of the manhole 1 of the joint pipe 3 so as to vertically project. The locking member is not an indispensable constituent element of the present invention, but if it exists, there is an advantage that the construction becomes easy. The locking plate 32 may be one or three or more.

The boot 4 is made of rubber, has an inner diameter capable of being smoothly fitted to the insertion portion 21, and has a tubular portion 41 having substantially the same length as the joint pipe 3. A flange 42 having an outer diameter larger than the outer diameter of the joint pipe 3 is provided at the outer end (one end) of the manhole 1 of the tubular portion 41. A cylindrical edge portion 43 extends from the outer edge of the collar portion 42 toward the other end. A taper portion 44 is provided on the inner periphery of the collar portion 42 to facilitate insertion. The cylindrical edge portion 43 is fitted onto one end 33 of the joint pipe 3 and is watertightly fastened by a fastening band 45 in which a fastener is attached to a stainless steel band.

As shown in FIG. 4, the assembly 30 is inserted into the annular gap 20 until the locking plates 32, 32 come into contact with the inner wall of the manhole 1. Subsequently, the other end 46 of the tubular portion 41 is fastened to the outer periphery of the other end 22 of the insertion portion 21 with the fastening band 47. As shown in FIG. 2, the fastening band 47 is attached to the outer circumference of the other end 46 of the tubular portion 41 in a loosened state in advance, so that the construction can be performed efficiently. In this construction, the tubular portion 41 of the boot 4 is externally fitted to the insertion portion 21, and the collar portion 42 has a function of keeping the assembled body 30 coaxial with the sewer main pipe 2. Locking plate 32,
32 is effective for positioning the insertion position of the assembly 30.

Subsequently, as shown in FIG. 5, the annular gap 20 between the joint pipe 3 and the mounting hole 12 is filled with the mortar 5. As a result, the joint pipe 3 fixed to the side wall 11 of the manhole 1 with the mortar 5 is elastically connected in a watertight manner via the boot 4, and has the cylindrical space 10 and is largely movable in the rotational direction, the radial direction and the axial direction. A displaceable sewer main 2 connection structure is obtained.

FIG. 6 shows a second embodiment of the first invention, in which an elastic ring 40 is fitted to prevent foreign matters such as dust from clogging the cylindrical space 10 between the joint pipe 3 and the boot 4. . When the cylindrical space 10 is clogged with foreign matter such as dust, the allowable range of displacement of the sewer main 2 with respect to the manhole 1 is reduced. If the elastic ring 40 is formed of a hollow elastomer, it can be easily fitted into the tubular space 10.

As a result, earthquakes, crustal movements, manholes 1
Alternatively, when a heavy vehicle passes over the buried position of the sewer main line 2, shearing force, tensile force, compressive force,
Even if a load such as a twisting force is applied, it is possible to prevent a problem that the connection part of the sewer main pipe 2 to the manhole 1 is damaged, the edge of the sealing surface is cut off, and water is flooded.

7 to 9 show the first aspect of the fifth and sixth aspects.
3rd Example of invention is shown. In order to prevent protrusion into the manhole 1 and ensure smooth drainage, the other end 31 of the joint pipe 3
The other end 46 of the tubular portion 41 of the boot 4 and the other end 22 of the insertion portion 21 are set to be substantially flush with the inner wall surface 1C of the manhole 1. For this reason, when tightening the fastening band 47 at the construction site, the tightening work becomes difficult.

In this embodiment, a substantially rectangular notch 38 is provided on the upper side of the other end 31 of the joint pipe 3, and the locking plate 32 is provided on the lower side.
Only one is provided. As shown in FIG. 8, the notch 38 serves as a window into which the wrench 6 is inserted and rotated when tightening the fastening bolt 48 of the fastening band 47 with the wrench 6. With this configuration, the tightening work of the fastening bolt 48 can be facilitated. The shape of the notch 38 may be another shape such as an arc shape.

Mortar 5 commonly used as a filler
Has water permeability, the presence of the notch 38 tends to form a flooded channel through which groundwater permeates with time. In this embodiment, a rubber waterproof member 39 is fitted in the notch 38. As a result, it is possible to prevent the formation of a short-circuited water inflow path in the notch 38, and it is possible to effectively prevent water inflow over a long period of time.

In this embodiment, an epoxy waterproof layer 51 is formed on the manhole 1 side of the mortar 5. This makes it possible to prevent the infiltration of groundwater through the mortar 5 for a long period of time. Also in this embodiment, a plurality of locking plates 32 may be provided.

FIG. 10 shows the second invention according to claims 7-9.
~ It demonstrates with FIG. In the present invention, the connection structure between the manhole 1 and the main sewer pipe 2 is performed by inserting the joint pipe 3 from the inside of the manhole 1 into the annular gap 20 between the mounting hole 12 and the insertion portion 21, as shown in FIG. Joint pipe 3
A tip holding ring 34 made of foamed resin or rubber is attached to one end 33 of the. The tip holding ring 34 has a substantially rectangular cross section, and an inclined surface 35 is formed at the inner peripheral angle at one end to facilitate insertion.

FIG. 11 shows a state in which the joint pipe 3 is inserted into the mounting hole 12, in which the locking plates 32, 32 come into contact with the inner side surface of the side wall 11 and the distal end retaining ring 34 acts to insert the joint pipe 3 into the mounting hole 12. A cylindrical space 10 is formed concentrically with the portion 21. Next, as shown in FIG. 12, the annular elastic packing 7 is press-fitted from the manhole 1 into the cylindrical space 10 by the press-fitting machine 70. In this embodiment, the annular elastic packing 7 has a semi-cylindrical tubular portion 71 at the front end thereof, and the inner and outer circumferences of the ring-shaped elastic packing 7 improve the sealing property and facilitate the deformation.
2, 73 are circumferentially provided, and a jig mounting recess 74 is provided at the rear end.

After press-fitting the annular elastic packing 7, FIG.
3, an annular gap 20 between the joint pipe 3 and the mounting hole 12
With mortar 5. As a result, the joint pipe 3 fixed to the side wall 11 of the manhole 1 with the mortar 5 is water-tightly elastically connected to the joint pipe 3 via the tip holding ring 34 and the annular elastic packing 7, and has the cylindrical space 10 in the rotational direction, A connection structure of the main sewer pipe 2 that can be largely displaced in the radial direction and the axial direction is obtained.

As shown in FIG. 13, if an epoxy resin layer 37 that is well compatible with the mortar 5 is provided on the outer circumference of the joint pipe 3, it is effective to secure a seal. Furthermore, the joint pipe 3
A stopper ring 36 is fitted on the inner circumference of the. The function of the stopper ring 36 is to press the press-fitted annular elastic packing 7 against the main sewer pipe 2 to increase the sealing property.

FIG. 14 shows a second embodiment of the second invention.
In this embodiment, a plurality of annular elastic packings 7 are press-fitted in series in the cylindrical space 10. With this configuration, there is an advantage that the sealing performance can be secured even when the sewer main pipe 2 is pulled and displaced in the withdrawal direction. It is also effective to form the annular elastic packing 7 with water-expanded rubber to improve the sealing property.

FIG. 15 shows a third embodiment of the second invention.
In this embodiment, the insertion portion 21 of the sewer main pipe 2 having a predetermined length is cut to assemble the joint pipe 3 and the annular elastic packing 7 with the assembled body 5.
Forming 0. The assembly 50 is connected to the end of the main sewer 2 by a stainless steel collar 26 fitted on the cut end of the insertion part 21. According to this method, construction at the construction site becomes easier.

16 and 17 show the third invention. In the present invention, instead of the annular elastic packing 7, a plurality of rubber rod-shaped elastic bodies 8 are press-fitted into the cylindrical space 10 at equal intervals by the fasteners 9 with the screws 91. In this configuration, the joint pipe 3 and the insertion portion 21 are sealed by the rubber tip holding ring 3
4 and the tubular space 10 is formed by a plurality of rubber rod-shaped elastic bodies 8. The present invention has an advantage that a simple jig can be used for press-fitting the elastic body 8.

[Brief description of drawings]

FIG. 1 is a connection construction diagram of a manhole and a sewer main of the first invention.

FIG. 2 is a connection construction diagram of the manhole of the first invention and the main sewer pipe.

FIG. 3 is a front view (a) and a sectional view (b) of the joint pipe.

FIG. 4 is a connection construction diagram of the manhole and the sewer main of the first invention.

FIG. 5 is a connection construction diagram of the manhole and the sewer main of the first invention.

FIG. 6 is a sectional view of a connection structure between a manhole and a sewer main according to a second embodiment of the first invention.

FIG. 7 is a sectional view of a connection structure between a manhole and a sewer main according to a third embodiment of the first invention.

FIG. 8 is a perspective view of a connection structure between a joint pipe and a sewer main pipe according to a third embodiment of the first invention.

FIG. 9 is a perspective view of a joint pipe of a third embodiment of the first invention.

FIG. 10 is a connection construction diagram of the manhole and the sewer main of the second invention.

FIG. 11 is a connection construction diagram of the manhole and the sewer main of the second invention.

FIG. 12 is a connection construction diagram of the manhole and the sewer main of the second invention.

FIG. 13 is a cross-sectional view of a connection structure between a manhole and a sewer main of the second invention.

FIG. 14 is a connection construction diagram of the manhole and the sewer main of the second embodiment of the second invention.

FIG. 15 is a connection construction diagram of the manhole and the sewer main of the third embodiment of the second invention.

FIG. 16 is a connection construction diagram of the manhole and the sewer main of the third invention.

FIG. 17 is a connection construction diagram of the manhole and the sewer main of the third invention.

FIG. 18 is a connection construction diagram of a conventional manhole and a main sewer pipe.

[Explanation of symbols]

1 manhole 10 cylindrical space 11 Side wall 12 mounting holes 2 Sewage main 20 annular gap 21 Insert 22 The other end of the insertion part 3 joint pipe 30 Assembly of joint pipe and boot 32 Locking plate (locking member) 33 One end of joint pipe 34 Tip retaining ring (annular retaining member) 37 Resin layer 38 Notches 39 Waterproof material 4 boots 40 elastic ring 42 collar part 43 Cylinder edge 45, 47 Fastening band 46 the other end of the cylinder 48 fastening bolts 5 Mortar (filler) 7 Ring elastic packing 8 elastic body

Claims (13)

[Claims] 1. A manhole for watertightly connecting an annular gap between the mounting hole and the insertion portion by loosely fitting an insertion portion which is an end portion of the sewer main into a mounting hole provided on a side wall of the manhole. A connection structure with a main sewer pipe, which is smaller in diameter than the mounting hole and larger in diameter than the main sewer pipe, and one end of which is water-tightly fixed to one end of the joint pipe and is inserted into the insertion portion. An assembly having an inner diameter to be fitted externally and a boot forming a cylindrical space with the inner circumference of the joint pipe is inserted into the annular gap from inside the manhole with one end of the assembly first. A manhole and a sewer main, characterized in that the other end of the boot and the other end of the insertion part are watertightly fixed, and an annular gap between the mounting hole and the joint pipe is filled with a filler. Connection structure. 2. The connection structure between a manhole and a sewer main according to claim 1, wherein one end of the boot has a collar portion and a tubular edge portion that extends an outer edge of the collar portion to the other end side. A connection structure between a manhole and a main sewer, wherein the cylindrical edge portion is fitted onto one end of the joint pipe. 3. The connection structure for a manhole and a sewer main according to claim 1, wherein one end or the other end of the boot is fixed by a fastening band. Connection structure with. 4. The manhole according to any one of claims 1 to 3, wherein an elastic ring is fitted to the other end of the cylindrical space, and the manhole is connected to the main sewer pipe. Connection structure with the main sewer. 5. The connection structure between the manhole and the main sewer pipe according to claim 1, wherein the other end of the joint pipe is provided with the other end of the boot and the other end of the insertion portion. A connection structure between a manhole and a main sewer, comprising a notch for tightening the fastening band for watertightly fixing. 6. The connection structure between a manhole and a sewer main according to claim 5, further comprising a waterproof member for closing the notch, the connection structure between the manhole and the sewer main. 7. A manhole for watertightly connecting an annular gap between the mounting hole and the insertion part by loosely fitting an insertion part which is an end of the sewer main into a mounting hole provided on a side wall of the manhole. In the connection structure with the sewage main, in the annular gap, while inserting a joint pipe having a diameter smaller than the mounting hole and larger than the sewage main, a manhole between the joint pipe and the sewage main An annular elastic packing is fitted from inside to form a tubular space and seal,
A connection structure between a manhole and a main sewer, wherein an annular gap between the mounting hole and the joint pipe is filled with a filler. 8. The connection structure between a manhole and a sewer main according to claim 7, wherein an annular holding member is attached to one end of the joint pipe. 9. The connection structure between a manhole and a sewer main according to claim 7, wherein the annular holding member is a foam resin ring attached to one end of the joint pipe. And the connection structure with the main sewer. 10. A mounting hole provided on a side wall of a manhole,
It is a connection structure between a sewer main and a manhole that watertightly connects the annular gap between the mounting hole and the insertion part by loosely fitting the insertion part that is the end of the sewage main, and in the annular gap. , A diameter smaller than the mounting hole and larger than the sewage main pipe, and insert a joint pipe having an annular holding member having a sealing action with the insertion portion at the tip, and the joint pipe and the sewage main pipe A connection between the manhole and the main sewer pipe, characterized in that an elastic body is fitted from inside the manhole to form a cylindrical space, and a filling material is filled in an annular gap between the mounting hole and the joint pipe. Construction. 11. A connection structure for connecting a manhole and a sewer main according to claim 1, wherein a locking member that engages with an inner wall of the manhole is provided at the other end of the joint pipe. Characteristic manhole and sewer main connection structure. 12. The connection structure between a manhole and a sewer main according to claim 1, wherein the locking member is a locking plate provided one above and one below. Connection structure between the manhole and the main sewer pipe. 13. The connection structure for a manhole and a sewer main according to claim 1, wherein a resin layer is provided on the outer circumference of the joint pipe. Connection structure with.