JP2012136865A - Connector of manhole and rehabilitated pipe and installation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector of a manhole and a rehabilitated pipe which prevents damage to an end of the rehabilitated pipe even in the case that the rehabilitated pipe connected to the manhole is dislocated in a diagonal direction to the manhole due to earthquake or the like, allowing for installation by work operation only inside the existing manhole.SOLUTION: A connector body 30 comprises a manhole fixing part 31 which is in close contact with the inner wall surface of a manhole 50 to be fixed, a rehabilitated pipe fixing part 32 which is in close contact with the outer peripheral wall of the rehabilitated pipe to be fixed, and a bellows part 33 having a bent portion which is disposed between the manhole fixing part 31 and the rehabilitated pipe fixing part 32. The connector body 30 is integrally formed of an elastic material. A part of the connector body 30 which is exposed to inside the manhole 50 is covered with a cover member 10. The bellows part has a protective member 20.

Description

  The present invention relates to a connection tool between a rehabilitation pipe and a manhole that are newly formed along an inner wall surface of an existing sewer pipe that has become obsolete, and an installation method thereof.

  When a sewer pipe that has deteriorated due to aging is used as a new sewer pipe, a new sewer pipe (hereinafter referred to as "rehabilitation") is constructed along the inner wall surface of the old existing sewer pipe for the convenience of construction. A method of forming a tube) is widely used.

  A connector for connecting a rehabilitation pipe and a manhole has already been proposed so that the rehabilitation pipe is not damaged at the connection portion between the manhole and the rehabilitation pipe even when the rehabilitation pipe moves due to an earthquake or the like.

  FIG. 15 shows the configuration of a conventional connector between such a manhole and a rehabilitation pipe.

  In FIG. 15, a sewer pipe connection port 51 is provided at the bottom of the manhole 50, and an old existing sewer pipe 60 is connected to the sewer pipe connection port 51. Inside the sewer pipe 60, a rehabilitation pipe 70 is formed along its inner wall surface. A rubber ring 80 for earthquake resistance is disposed between the outer peripheral wall at the end of the rehabilitation pipe 70 and the manhole 50.

  An enlarged view of the rubber ring 80 is shown in FIG.

  As shown in FIG. 16, the end portion of the rehabilitating tube 70 is supported in contact with the rubber ring 80, and the end surface of the rehabilitating tube 70 is exposed to the inner wall surface 52 side of the manhole 50. Yes.

  In the conventional connector (rubber ring 80) between the manhole and the rehabilitation pipe constructed as described above, even when the rehabilitation pipe 70 moves in the length direction due to an earthquake or the like, it is shown in FIG. As described above, since the position of the end portion of the rehabilitating tube 70 is moved, an excessive force is not applied to the end portion of the rehabilitating tube 70, and therefore the breakage of the end portion of the rehabilitating tube 70 can be prevented.

  However, in the conventional connection tool between the manhole 50 and the rehabilitation pipe 70, when the rehabilitation pipe 70 moves so as to be inclined with respect to the manhole 50 in an earthquake or the like, the end of the rehabilitation pipe 70. Therefore, there is a possibility that an excessive force is applied to the end of the rehabilitation pipe and the end portion of the rehabilitation pipe is damaged.

  In order to solve the above problems, the present invention is interposed between a rehabilitation pipe formed along an inner wall surface of an existing sewer pipe connected to a sewer pipe connection port of a manhole and the manhole. A connecting tool body and a rehabilitation pipe comprising a connecting tool body and a cover member that covers a portion of the connecting tool body that is exposed to the inside of the manhole. A substantially hollow disk-shaped manhole fixing part that is tightly fixed to the inner wall surface of the peripheral part of the sewer pipe connection port, a cylindrical rehabilitation pipe fixing part that is closely fixed to the outer peripheral wall of the rehabilitation pipe, and the rehabilitation pipe fixing part And the manhole fixing portion, and the manhole fixing portion, the bellows portion, and the rehabilitating tube fixing portion are elastic. Integrated with material The cover member covering the portion exposed to the inside of the manhole of the connector body and fixed to the inner wall surface of the manhole is on the surface side extending from the rehabilitation pipe side to the inner wall surface side of the manhole. The cross-sectional shape is a gentle curve. Here, a bellows part protection member may be interposed between the cover member that covers the connector main body and the bellows part.

  In addition, as a method of installing the connection tool between the manhole and the rehabilitation pipe as described above, the present invention includes an inner wall surface of the peripheral portion of the sewer pipe connection port of the manhole and the existing sewer that is exposed on the inner wall surface side. A first step of excavating an end portion of a pipe from the inside of the manhole to secure a space in which the connector main body can be installed, and the connector main body is disposed in the space formed by the first step. A second step, a third step of forming the rehabilitation pipe along the inner wall surface of the existing sewer pipe, and a fourth step of closely fixing the rehabilitation pipe fixing portion to the outer peripheral wall of the end portion of the rehabilitation pipe. And a fifth step of covering the connector main body with the cover member and fixing the cover member and the manhole fixing portion of the connector main body to the inner wall surface of the manhole. . Here, the second step may further include a step of attaching a bellows part protection member to the bellows part of the connector main body.

  According to the present invention, even when the rehabilitation pipe connected to the manhole moves so as to be inclined with respect to the manhole due to an earthquake or the like, it is possible to prevent the end of the rehabilitation pipe from being damaged, only inside the existing manhole. It is possible to provide a manhole and rehabilitation pipe connector that can be installed by the operation in the above.

It is a disassembled perspective view which shows the structure of Example 1 of this invention. It is explanatory drawing of a structure of the connection tool main body 30 shown in FIG. It is explanatory drawing of a structure of the connection tool main body 30 shown in FIG. It is explanatory drawing of a structure of the bellows part protection member 20 shown in FIG. It is explanatory drawing of a structure of the bellows part protection member 20 shown in FIG. It is explanatory drawing of a structure of the cover member 10 shown in FIG. It is explanatory drawing of operation | movement of Example 1 of this invention. It is explanatory drawing of operation | movement of Example 1 of this invention. It is explanatory drawing of operation | movement of Example 1 of this invention. It is explanatory drawing of the installation method of Example 1 of this invention. It is explanatory drawing of the installation method of Example 1 of this invention. It is explanatory drawing of the installation method of Example 1 of this invention. It is explanatory drawing of the installation method of Example 1 of this invention. It is explanatory drawing of the installation method of Example 1 of this invention. It is sectional drawing which shows the structure of the connection tool of the conventional manhole and the renovated pipe. It is explanatory drawing of the connection tool of the conventional manhole and the renovated pipe. It is explanatory drawing of the connection tool of the conventional manhole and the renovated pipe.

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

  FIG. 1 is an exploded perspective view showing the configuration of the first embodiment of the present invention. As shown in FIG. 1, the first embodiment includes a cover member 10, a bellows part protection member 20, and a connector main body 30. Reference numeral 50 denotes a manhole.

  Hereinafter, each part of the first embodiment will be described in detail with reference to the drawings.

  2 and 3 are diagrams showing the configuration of the connector main body 30. FIG. FIG. 2A is a view as seen from above, and 52 indicates the inner wall surface of the manhole. 2B is a side view, and FIG. 2C is a perspective view. 3A is a front view, and FIG. 3B is a cross-sectional view.

  As shown in FIGS. 2 and 3, the connector main body 30 is provided on the outer wall of the rehabilitating pipe and the substantially hollow disk-shaped manhole fixing portion 31 that is curved so as to be tightly fixed to the inner wall surface 52 of the manhole. Cylindrical rehabilitation pipe fixing part 32 capable of tight fixation, and a bellows part formed such that the cross-sectional shape disposed between rehabilitation pipe fixing part 32 and manhole fixing part 31 has a bent part. 33. In addition, the connector main body 30 which consists of this manhole fixing | fixed part 31, the rehabilitation pipe | tube fixing | fixed part 32, and the bellows part 33 is integrally formed by elastic materials, such as rubber | gum.

  4A and 4B are diagrams showing the configuration of the bellows part protection member 20, wherein FIG. 4A is a perspective view, FIG. 4B is a front view, and FIG. 4C is a cross-sectional view. The bellows portion protection member 20 is made of a deformable material such as rubber or sponge. In the first embodiment, the bellows portion protection member 20 is formed in a shape having a cylindrical side surface portion 22 and a hollow disk-shaped upper surface portion 21. Has been. The reason why it is formed in such a shape is to facilitate attachment of the connector main body 30 to the bellows portion 33 as shown in FIG. Therefore, the shape of the bellows portion protection member 20 is not limited to the shape shown in FIGS.

  6A and 6B are diagrams illustrating the configuration of the cover member 10, where FIG. 6A is a view seen from above, FIG. 6B is a front view, FIG. 6C is a perspective view seen from the front side, and FIG. It is the perspective view seen from the side. This cover member 10 is disposed to cover the exposed part of the connector body 10 inside the manhole, and protects the connector body 10 from being damaged by dust or the like in the sewage. It has a function to do.

  As shown in FIGS. 6B, 6 </ b> C, and 6 </ b> D, in the first embodiment, the cover member 10 has a shape in which the lower side is chipped. This is because, in the installation work of Example 1, the portion of the connector main body 30 corresponding to the missing portion is installed so as not to be exposed inside the manhole. Further, the reason why the back surface side of the cover member 10 is curved is that it is in close contact with the inner wall surface 52 of the manhole 50 in the same manner as the manhole fixing portion 31 of the connector main body 30. is there.

  Furthermore, the shape of the surface side of the cover member 10 is formed such that the cross-sectional shape from the inner rehabilitation pipe side to the inner wall surface side of the outer manhole is a gentle curve (see the cross-sectional shape in FIG. 7). ). This is to prevent dust or the like in the sewage from adhering to the surface of the cover member 10.

  In the first embodiment configured as described above, as shown in FIG. 7, the manhole fixing portion 31 of the connector main body 30 and the cover member 10 are both attached to the inner wall surface 52 of the manhole 50 by a plurality of fixing bolts 34. The rehabilitation pipe fixing part 32 is fixed so as to be in close contact with the outer peripheral wall of the rehabilitation pipe 32 by a fixing band 35.

  When the present Example 1 configured as described above is interposed between the manhole 50 and the rehabilitation pipe 70, even if the rehabilitation pipe 70 moves inward of the manhole 50 as shown in FIG. Even if the rehabilitation tube 70 moves outward of the manhole 50 as shown in FIG. 8, or even if the rehabilitation tube 70 moves so as to be inclined with respect to the manhole 50 as shown in FIG. Therefore, an excessive force is not applied to the end portion of the rehabilitation tube 70, and therefore, the end portion of the rehabilitation tube 70 is not damaged.

  Next, the installation method of the present Example 1 is demonstrated using FIGS. In addition, regarding the installation work of the present Example 1 demonstrated below, all the work can be performed inside the existing manhole.

  First, as a preparation, in order to secure a space for installing a machine tool for excavating the inner wall surface 52 around the sewer pipe connection port 51 of the manhole 50, the bottom surface portion 53 of the manhole 50 has a predetermined depth. Just do the vine work.

  Next, as shown in FIG. 10B, the hole excavator 90 is installed, and the inner wall surface of the manhole 50 around the sewer pipe connection port 51 and the end of the existing sewer pipe 60 are bored within a predetermined range. The space which can dig and install the connector main body 30 which concerns on the present Example 1 is ensured.

  Furthermore, as shown in FIG. 11A, the anchors 54 for the fixing bolts of the connector main body 30 and the cover member 10 are driven into the prepared holes 52a opened in the inner wall surface 52 of the manhole by the drilling drill 91.

  Next, as shown in FIG. 11B, the connector main body 30 with the bellows part protection member 20 attached is attached to the inner wall surface 52 of the manhole 50. At this time, the manhole fixing portion 31 is temporarily fixed to the inner wall surface 52 with a double-sided adhesive tape or the like. Next, as shown in FIG. 12A, the fixing band 35 is loosened and attached to the rehabilitation pipe fixing portion 32.

  In this state, an operation of forming the rehabilitation pipe 70 inside the existing sewer pipe 60 is performed, and the rehabilitation pipe fixing portion 32 is fixed to the end portion of the rehabilitation pipe 70 using the fixing band 35 as shown in FIG. Closely fixed to the outer peripheral wall.

  Next, as shown in FIG. 13A, the cover member 10 and the manhole fixing portion 31 of the connector main body 30 are closely fixed to the inner wall surface 52 of the manhole 50 using a plurality of fixing bolts 34, and FIG. Set to the state shown in b).

  Finally, as shown in FIG. 14, in the preparatory lifting operation, an invert 55 is installed in the suspended portion, and a mortar 56 is disposed in the gap between the invert 55 and the bottom surface portion 53 of the manhole 50, The caulking material is disposed at the step portion between the end portion of the tube 70 and the invert 55 to complete the operation.

  According to the installation work of the first embodiment only in the existing manhole as described above, the first embodiment can be installed in a state where the connector main body 30 is not exposed inside the manhole 50.

DESCRIPTION OF SYMBOLS 10 Cover member 20 Bellows part protection member 21 Upper surface part 22 Side surface part 30 Connection tool main body 31 Manhole fixing | fixed part 32 Rehabilitation pipe fixing part 33 Bellows part 34 Fixing bolt 35 Fixing band 50 Manhole 51 Sewer pipe connection port 52 Inner wall surface 52a Pilot hole 53 Bottom portion 54 Anchor 55 Invert 56 Mortar 57 Caulking material 60 Existing sewer pipe 70 Rehabilitation pipe 80 Rubber ring

Claims (4)

The rehabilitation pipe formed along the inner wall surface of the existing sewer pipe connected to the manhole sewer pipe connection port and the connection tool main body interposed between the manhole, the manhole of the connection tool main body It is a connecting tool between a manhole and a rehabilitation pipe composed of a cover member covering a portion exposed to the inside,
The connector main body includes a substantially hollow disk-shaped manhole fixing portion that is closely fixed to the inner wall surface of the peripheral portion of the manhole sewer pipe connection port, and a cylindrical rehabilitation tube that is closely fixed to the outer peripheral wall of the rehabilitation tube. A fixing portion, and a bellows portion in which a cross-sectional shape disposed between the rehabilitation tube fixing portion and the manhole fixing portion has a bent portion, and the manhole fixing portion and the bellows portion And the rehabilitation pipe fixing part are integrally formed of an elastic material,
The cover member that covers the portion of the connector body that is exposed inside the manhole and is fixed to the inner wall surface of the manhole has a cross-section on the surface side from the rehabilitation pipe side to the inner wall surface side of the manhole. A connector for a manhole and a rehabilitation pipe, characterized in that the shape is a gentle curve.   The connector for connecting a manhole and a rehabilitation pipe according to claim 1, wherein a bellows part protecting member is interposed between the cover member covering the connector main body and the bellows part. An installation method for installing the connection tool between the manhole and the rehabilitation pipe according to claim 1 by construction only in the existing manhole,
The inner wall surface of the peripheral part of the sewer pipe connection port of the manhole and the end part of the existing sewer pipe exposed on the inner wall surface side are excavated from the inside of the manhole to secure a space in which the connector main body can be installed. A first step of:
A second step of disposing the connector main body in the space formed by the first step;
A third step of forming the rehabilitation pipe along an inner wall surface of the existing sewer pipe;
A fourth step of closely fixing the rehabilitation pipe fixing part to the outer peripheral wall of the end of the rehabilitation pipe;
A fifth step of covering the connector main body with the cover member and fixing the cover member and a manhole fixing portion of the connector main body to an inner wall surface of the manhole. How to install the tool.   The said 2nd process further includes the process of mounting | wearing the said bellows part of the said connector main body with the bellows part protection member, The installation of the connector of the manhole and renovation pipe | tube of Claim 3 characterized by the above-mentioned. Method.

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