JPH08144308A - Work method for connection part between manhole and sewage pipe - Google Patents

Abstract

PURPOSE: To facilitate work and increase water stop performance of a sticking part between a manhole and a sewage pipe by eliminating adhesion of water content and resulting poor adhesion produced when adhesive agent is applied onto the manhole when the sticking part is installed between the manhole and the sewage pipe using a rubber joint. CONSTITUTION: Using a rubber joint 7 provided at least a tube part 8 and a flange part 9 installed extendedly in radial-direction on the tube part 8, an adhesive sheet 5 is stuck on the outer wall surfaces of a manhole 1 so that it surrounds a through hole 3. Also a sewage pipe 14 is inserted into the through hole 3 of the manhole 1, the tube part 8 is inserted co-axially into the end part of the sewage pipe 14, and an adhesive layer 12 is provided between the inner side of the tube part 8 and the sewage pipe 14 so as to stick the flange part 9 to the outer wall surfaces of the manhole 1 through the adhesive sheet 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a joint between a manhole and a sewer pipe.

[0002]

2. Description of the Related Art At a joint portion between a manhole and a sewer pipe, a through hole having a diameter larger than an outer diameter of the sewer pipe to be used is formed on an outer wall of the manhole, and the sewer pipe is mounted in the through hole. Mortar is placed around the sewer pipe without a gap. However, in this construction method, when the joint between the manhole and the mortar and the joint between the mortar and the sewer pipe is weak, water seeps out from this joint portion,
The bottom of sewer pipes and manholes could become unstable, and the pipes could bend and cause water leakage.

As a method for solving this problem, the applicant of the present invention has disclosed a construction method schematically shown in FIG. 4 in Japanese Utility Model Publication No. 4-29190. That is, the rubber joint 7 is used when constructing the joint between the manhole 1 and the sewer pipe 14. The joint 7 includes a cylindrical portion 8, a flange portion 9 extending in the radial direction of the cylindrical portion 8, and a cylindrical portion 8
And a pair of projecting portions 10A and 10B that project to the opposite side. First, the through hole 3 is formed on the outer wall surface of the manhole 1.
An adhesive is applied in a ring shape so as to surround the periphery of, and the solvent of this adhesive is dried to form the adhesive layer 4.

Next, the sewer pipe 14 is inserted into the through hole 3 of the manhole 1, and the cylindrical portion 8 is coaxially inserted into the end of the sewer pipe 14. A butyl rubber adhesive layer 12 is provided between the inside of the cylindrical portion 8 and the sewer pipe 14, and a fastening rubber band 13 is tightened from above. The butyl rubber-based pressure-sensitive adhesive layer 11 on the back surface of the flange portion 9 is placed on and adhered to the adhesive layer 4. The protrusions 10A, 10B of the joint 7 are inserted into the through holes 3, and mortar is cast around the sewer pipe 14 and the protrusions to solidify the mortar.

[0005]

However, the above-mentioned construction method has the following problems. That is, when the butyl rubber adhesive layer 11 of the flange portion 9 is attached to the outer wall surface of the manhole, an adhesive is applied to the manhole and the solvent is dried to form the adhesive layer 4, The sticking work is performed from above the agent layer 4. However, the place where this joint is constructed is in the ground formed by excavation of the ground, and the humidity is high, and especially when there is groundwater, the outer wall surface of the manhole gets wet and it is difficult to attach the flange portion. In this case, the adhesive cannot be applied unless the moisture on the outer wall surface is dried by the flame of a burner or the like.

Further, it is necessary to leave the adhesive for 2 to 5 minutes until the solvent is dried by applying the adhesive onto the manhole, but if moisture adheres to the adhesive layer during this leaving time, it remains as it is. If the flange part of the joint was pasted, the adhesion would be poor and water leakage could occur. But,
It is extremely complicated to remove the water adhering to the adhesive layer one by one, which requires a great deal of trouble.

An object of the present invention is to attach water generated when an adhesive is applied onto a manhole when a joint portion between a manhole and a sewer pipe is constructed by using a rubber joint as described above. Another problem is to solve the problem of poor adhesion due to this, to facilitate this construction, and to further improve the water blocking performance of this bonded portion.

[0008]

SUMMARY OF THE INVENTION The present invention is a method of constructing a joint between a concrete manhole and a sewer pipe: at least a tubular portion and a flange extending radially of the tubular portion. Using a rubber joint with a section, attach an adhesive sheet and release paper to the outer wall of the manhole so as to surround the through hole of the manhole, insert the sewer pipe into the through hole of the manhole, and connect the end of the sewer pipe. Coaxially insert the tubular portion in, to provide an adhesive layer between the inside of the tubular portion and the sewer pipe, peel off the release paper, the flange portion and the outer wall surface of the manhole the adhesive sheet. The present invention relates to a construction method, which is characterized by interposing and adhering.

[0009]

The present inventor has variously studied the material and amount of solvent for the method of applying and drying the adhesive on the outer wall surface of the manhole. It was difficult to solve the problem of adhesion.

Therefore, the idea of examining the adhesive was changed, and attention was paid to the process of assembling the manhole. That is,
An adhesive was applied in advance on the outer wall surface of the manhole on the ground, and a pressure-sensitive adhesive sheet was stuck on this, and the surface of the pressure-sensitive adhesive sheet was protected with release paper. In this state, the manhole was housed in an underground construction site, the release paper was peeled off underground, and an attempt was made to stick the flange portion of the joint on the adhesive sheet of the manhole. As a result, no water adhered to the pressure-sensitive adhesive sheet, and no adhesion failure occurred. Moreover, the construction can be performed extremely easily, and the water stopping performance of the flange portion has been further improved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a perspective view showing the periphery of the joint portion of the manhole 1, and FIG. 1B is a sectional view showing the periphery of the through hole 3 of the manhole 1. A through hole 3 for joining is formed in the manhole 1. When manufacturing the prefabricated manhole 1 in a factory, a ring-shaped adhesive is applied around the through hole 3 on the outer wall surface of the manhole 1, and the adhesive is dried to form the adhesive layer 4. Adhesive sheet 5
The ring-shaped sheet 2 composed of
It is affixed so as to surround the periphery of the so that the state shown in FIG.

FIG. 2 (a) is a perspective view showing the rubber joint 7, and FIG. 2 (b) is a plan view of the joint 7 as seen from the protruding portion. The joint 7 includes a cylindrical portion 8, a flange portion 9 extending in the radial direction of the tubular portion 8, and a pair of projecting portions 10A and 10B projecting to the opposite side of the tubular portion 8. . The outer diameter of the protruding portion is slightly smaller than the inner diameter of the through hole 3.

After installing the manhole 1 of FIG. 1 in the ground as shown in FIG. 3, a sewer pipe 14 composed of a fume pipe or the like is provided.
Is inserted into the through hole 3. At this time, the end of the sewer pipe 14 is inserted into the cavity 20 of the joint 7, and the cylindrical portion 8 is coaxially inserted into the end of the sewer pipe 14. A butyl rubber adhesive layer 12 is provided between the inside of the cylindrical portion 8 and the sewer pipe 14, and a fastening rubber band 13 is tightened from above. Insert the protrusions 10A, 10B of the joint 7 into the through hole 3,
A mortar 15 is cast around the sewer pipe 14 and the protrusion to solidify the mortar.

Here, according to the present invention, the release paper 6 is peeled from the pressure sensitive adhesive sheet 5 to expose the pressure sensitive adhesive sheet 5, and the butyl rubber pressure sensitive adhesive layer on the back surface of the flange portion 9 is formed on the pressure sensitive adhesive sheet 5. Paste 11. This construction step includes the steps of peeling the release paper and crimping the flange portion 9, and can be completed in an extremely short time, so that the adhesive force does not decrease due to the adhesion of water.

As the pressure-sensitive adhesive sheet 5, a sheet made of a butyl rubber-based pressure-sensitive adhesive is particularly preferable from the viewpoint of adhesion to the concrete. In addition, the sewer pipe 14 through the through hole 3
After being inserted into the inside, the relative positions of the sewer pipe 14 and the through hole 3 may shift due to factors such as ground subsidence. Therefore, in order to absorb such deformation, it is preferable to provide a deformable portion in the cylindrical portion 8. It is preferable to provide a bellows as the deformable portion. Furthermore, for the same reason, the protrusions 10A, 10B
It is also possible to make the protrusion easily deformed by forming a notch in it.

[0016]

As described above, according to the present invention, when the joint portion between the manhole and the sewer pipe is constructed by using the rubber joint, the moisture between the flange portion and the manhole is prevented. No adhesion or residue occurred, and no adhesion failure occurred. Moreover, the construction can be performed extremely easily, and the water stopping performance of the flange portion has been further improved.

[Brief description of drawings]

FIG. 1A is a perspective view showing the periphery of a joint portion of a manhole 1, and FIG. 1B is a sectional view showing the periphery of a through hole 3 of the manhole 1.

FIG. 2A is a perspective view showing a joint 7, and FIG.
[Fig. 6] is a plan view of the joint 7 as seen from the protruding portion.

FIG. 3 is a sectional view showing a structure of a joint portion between a manhole 1 and a sewer pipe 14 according to the present invention.

FIG. 4 is a cross-sectional view showing a structure of a joint portion between a manhole 1 and a sewer pipe 14 according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 3 Through hole 4 Adhesive layer 5 Adhesive sheet 6 Release paper 7 Rubber joint 8 Cylindrical part 9 Flange part 10A, 10B Projection part 11, 12 Butyl rubber adhesive layer 13 Fastening rubber band 14 Sewer pipe

Claims (1)

[Claims] 1. A method for constructing a joint between a concrete manhole and a sewer pipe, the rubber joint comprising at least a tubular portion and a flange portion extending in the radial direction of the tubular portion. Using an adhesive sheet and release paper on the outer wall of the manhole so as to surround the through hole of the manhole, the sewer pipe is inserted into the through hole of the manhole, at the end of the sewer pipe. The tubular portion is coaxially inserted, an adhesive layer is provided between the inside of the tubular portion and the sewer pipe, the release paper is peeled off, and the flange portion and the outer wall surface of the manhole are A method for constructing a joint between a manhole and a sewer pipe, which is characterized in that an adhesive sheet is used for adhesion.