JP2000213054A - Existing old pipe regenerating construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an existing old pipe regenerating construction method capable of dispensing with works for mounting and dismounting a mounting member of a back-filling material pouring nozzle and filling a back-filling material into a clearance between an existing old pipe and a lining pipe while confirming its filling situation. SOLUTION: A timbering device 1 is inserted into a lining pipe 3 newly provided in an existing old pipe 2, and an annular frame is supported in the lining pipe 3 by a support means 13. Three or more hollow rod bodies 141, 141', 141' are arranged in a row in the longitudinal direction of the lining pipe 3, their tips are inserted into a pouring hole of the lining pipe 3, a back-filling material supply hose 4 is connected to a connection end at a basic end of the hollow rod body 141 in an intermediate part, and basic ends of the front and rear hollow rod bodies 141', 141' are left open. The back-filling material is discharged from a back-filling material discharge port in the vicinity of a tip of the hollow rod body 141 in the intermediate part, and the back-filling material is filled into a clearance between the existing old pipe 2 and the lining pipe 3 while confirming its filling situation based on an outflow condition of the back-filling material from the basic ends of the front and rear hollow rod bodies 141', 141'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an existing pipe rehabilitation method.

[0002]

2. Description of the Related Art Conventionally, as described in, for example, Japanese Patent Publication No. 3-48392, a new lining pipe such as a spiral pipe is inserted into an existing aging pipe, and the existing aging pipe and the new lining pipe are connected. There is known an old pipe rehabilitation method in which a backfill material is injected and filled into a gap between the pipes.

[0003] In such existing aging pipe rehabilitation method, Japanese Patent Application Laid-Open Nos. 10-121565 and 10-1 are disclosed.
A supporting device as described in JP 21566 is used. That is, when filling and filling the gap between the existing aging pipe and the new lining pipe with the backfill material, the shoring device is inserted into the new lining pipe, and the supporting device is provided by the support means provided on the shoring device. Is installed in the newly installed lining pipe so as to oppose the filling pressure of the backfill material.

[0004] When filling the gap between the existing aging pipe and the new lining pipe with the backfill material, as shown in FIG. 6, the backing material is inserted into the existing aging pipe (a) and the existing aging pipe (a). Insert the nozzle (e) at the end of the backing material supply hose (d) from one end of the lining pipe (b) into the gap (c) between the existing aging pipe (b) and the lining pipe (b). The backfill material was injected and filled. In FIG. 6, (f) is a valve provided in the nozzle (e).

Alternatively, as shown in FIG. 7, an injection hole (g) is pierced into a new lining tube (b) by using a tool such as a cylindrical saw having a saw blade at its tip, and the lining tube (b) is pierced. The mounting member (h) of the injection nozzle is attached to the inner surface of the device by welding or the like, the injection nozzle is mounted on the mounting member (h), and the backfill material is filled.

[0006]

However, as shown in FIG. 6, the gap between one end of the existing aging pipe (a) and the lining pipe (b) and the gap between the existing aging pipe (a) and the lining pipe (b). When filling the backfill material by inserting the nozzle (e) at the end of the backfill material supply hose (d) into (c),
When the construction distance of the existing deteriorated pipe (a) is long, it may be difficult to inject and fill the entire area by filling the backfill material from one end of the existing deteriorated pipe (a) and the lining pipe (b).

As shown in FIG. 7, an injection hole (g) is formed in the lining pipe (b), and a mounting member (h) of the injection nozzle is attached by welding or the like, and the injection member is mounted on the mounting member (h). When the backfill material is injected and filled by attaching the nozzle, it is necessary to remove the mounting member (h) and close the injection hole (g) after the injection and filling.

The present invention has been made in view of the above-mentioned problems in the conventional existing pipe rehabilitation method, and an object of the present invention is to solve the above problems and to provide a backfill material injection nozzle. There is no need to install or remove the mounting members, and to provide an existing pipe rehabilitation method that can fill the gap between the existing pipe and the lining pipe while checking the filling condition. is there.

[0009]

SUMMARY OF THE INVENTION The present invention provides a supporter having an annular frame which is inserted and installed in a lining pipe newly installed in an existing aging pipe, and supporting means for supporting the annular frame in the lining pipe. An existing aging pipe rehabilitation method using a device, wherein the supporting device includes a hollow rod provided with an external thread on an outer surface screwed into a screw hole provided in the annular frame, and rotating the hollow rod. By doing so, it is possible to advance and retreat from the inside of the annular frame to the outside, a backfill material discharge port is provided near the outer end of the hollow rod of the annular frame, and the inside of the annular frame of the hollow rod is provided. Using a support having a connection port that can be connected to one end of a backfill material supply hose at the base end, insert the support device into a lining pipe newly installed in an existing aging pipe, and support the annular frame. Due to the inside of the lining pipe Supporting, arranging three or more hollow rods in the longitudinal direction of the lining pipe, inserting their tips into the injection holes of the lining pipe, and supplying backfill material to the connection port at the base end of the hollow rod in the middle part. A hose is connected, and the base ends of the front and rear hollow rods are left open, and the backfill material is discharged from the backfill discharge port near the distal end of the hollow rod in the middle part, and the base ends of the front and rear hollow rods are connected. A method of rehabilitating an old pipe which fills a gap between the old pipe and the lining pipe while confirming the filling state from the outflow state of the backfill material from the pipe.

In the present invention, a spiral pipe formed by spirally winding a strip and connecting edges of adjacent strips may be used as the newly provided lining pipe. May be used.

[0011] The band of the spiral tube can be formed from a material obtained by reinforcing a resin such as vinyl chloride resin, polyethylene, polypropylene, polycarbonate, polyester, or a synthetic resin thereof with glass fibers, for example, by an extrusion molding method.

[0012]

The rehabilitating method for an old pipe according to the present invention has a hollow rod having an external thread provided on an outer surface screwed into a screw hole provided in the annular frame as the support device, and rotating the hollow rod. By doing so, it is possible to advance and retreat from the inside of the annular frame to the outside, a backfill material discharge port is provided near the outer end of the hollow rod of the annular frame, and the inside of the annular frame of the hollow rod is provided. Using a support having a connection port that can be connected to one end of a backfill material supply hose at the base end, insert the support device into a lining pipe newly installed in an existing aging pipe, and support the annular frame. And three or more hollow rods are arranged in the longitudinal direction of the lining pipe, and their distal ends are inserted into the injection holes of the lining pipe. Backing material supply hoe And the base ends of the front and rear hollow rods are left open, and the backfill material is discharged from a backfill material discharge port near the front end of the hollow rod in the middle part, and the base ends of the front and rear hollow rods are discharged from the base ends of the front and rear hollow rods. Filling the gap between the existing aging pipe and the lining pipe with the backfill material while checking the filling state from the outflow state of the backfill material, as in the past, filling the backfill material Mounting of nozzle mounting members,
Removal work is unnecessary, and the backfill material from the base end of the front and rear hollow rods flows out only when the hollow rods in the middle part are fully filled from the front and rear hollow rods, so it is constant at that time The gap between the existing aging pipe and the lining pipe in the section can be used as a guide when the backfill material is sufficiently filled.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of the existing aging pipe rehabilitation method of the present invention together with an example of a shoring device to be used. In FIG. 1, A is a shoring device, 1
Is an octagonal annular frame of the support device A, and the annular frame 1 is composed of a plurality of main members 11 and a bent joint 12,
The annular frame 1 is formed by inserting and fitting both ends of the main member 11 into the socket of the bent joint 12. Main member 1
The size of the annular frame 1 can be changed by adjusting the insertion depth into the bending joint 12 or by using the main members 11 having different lengths.

Reference numeral 2 denotes an existing aging pipe having a circular cross section to be rehabilitated, and reference numeral 3 denotes a lining pipe having a circular cross section newly installed in the existing aging pipe 2. The lining tube 3 is a spiral tube formed by spirally winding the band 32 and connecting the edges of adjacent bands. As shown in FIG. 2, the belt-like body 32 is provided with connecting ridges 3 near both ends of one surface of the substrate 321.
22 and a connecting ridge 323 are provided.
A rib 324 is provided in a protruding manner, and a reinforcing material having a W-shaped cross section is fitted between the ribs 324. The adjacent connecting projections 322 are connected by being inserted and fitted into the connection recesses 323 to form a spiral tube.

Reference numerals 13 and 14 denote support means provided on the annular frame 1. The support means 13 is for supporting the annular frame 1 in the lining tube 3. The support means 13 includes a rod 131 having an external thread provided on the outer surface thereof and a contact member 133 having a rod receiver 132. The rod 131 is an annular frame 1
Is screwed into a screw hole provided in the main member 11 of FIG.
A short-sided prism-shaped spanner hook 1311 is provided at a base end inside the annular frame 1 of the rod 131, and a distal end outside the annular frame 1 of the rod 131 is rotatably housed in a rod receiver 132.

A spanner hook 1311 at the base end of the rod 131
By rotating the rod 131 with a spanner.
The contact member 133 advances and retreats with respect to the annular frame 1. The contact member 133 is pressed against the inner surface of the lining tube 3 by screwing the rod 131, and when the contact member 133 is loosened, the contact member 133 is separated from the inner surface of the lining tube 3. Rod 1 of each support means 13
By screwing 31, the annular frame 1 is supported inside the lining tube 3.

The support means 14 is used to connect the annular frame 1 to the lining tube 3
And for supporting it inside the existing aging pipe 2. The support means 14 includes a hollow rod 141 having an external thread provided on the outer surface thereof, and a contact member 143 having a screw hole fitting 142. The hollow rod 141 is screwed into a screw hole provided in the main member 11 of the annular frame 1 and the screw hole fitting 142. A connection port 1411 that can be connected to one end of the backing material supply hose 4 is provided at a base end inside the annular frame 1 of the hollow rod 141, and a discharge port 1412 is provided at a distal end outside the annular frame 1 of the hollow rod 141. Is provided. In addition, 41 is a coupler provided at one end of the hose 4, 42 is a valve connected to the coupler 41, and the valve 42 is connected to the connection port 1411.

By rotating the hollow rod 141, the rod 131 advances and retreats with respect to the annular frame 1 and the screw hole fitting 142, and the hollow rod 141 is screwed into the hollow rod 141.
1 is pressed into the inner surface of the existing aging pipe 2 through the injection hole 31 of the lining pipe 3, the annular frame 1 is supported on the existing aging pipe 2, and the screw hole fitting 142 is connected to the hollow rod 1.
By screwing the contact member into the lining tube 41, the contact member 143 is pressed against the inner surface of the lining tube 3, the annular frame 1 is supported inside the lining tube 3, and the space between the existing aging tube 2 and the lining tube 3 is maintained. Has become. Conversely, when the screw hole fitting 142 is loosened, the contact member 143 separates from the inner surface of the lining tube 3, and when the hollow rod 141 is loosened, the hollow rod 141 is loosened.
Is separated from the inner surface of the existing aging pipe 2.

As shown in FIG. 1, the shoring device A is inserted into the lining pipe 3 newly installed in the existing aging pipe 2, and the annular frame 1 of the shoring device A is inserted into the lining pipe 3 by the support means 13. While supporting, the annular frame 1 is supported in the existing aging pipe 2 and the lining pipe 3 by the support means 14, and the interval between the existing aging pipe 2 and the lining pipe 3 is maintained.

In the existing pipe rehabilitation method of this example,
As shown in FIG. 3, three or more hollow rods 141 ', 14
1, 141 ′ are arranged in the longitudinal direction of the lining tube 3. The valve 42 provided at one end of the backing material supply hose 4 is connected to the connection port 1411 at the base end of the hollow rod 141 in the middle, and the base ends of the front and rear hollow rods 141 ′ and 141 ′ are opened. deep.

In this state, as shown in FIG. 3, by opening the valve 42, the hollow rod 14 at the intermediate portion is opened.
A backfill material such as mortar is discharged in the direction of arrow a from the backfill material discharge port 1412 near the front end of No. 1 and arrows of the backfill material from the base end of the backfill material from the front and rear hollow rods 141 ′ and 141 ′. The backfill material is filled into the gap between the existing deteriorated pipe 2 and the lining pipe 3 while checking the outflow state in the direction b.

Thus, the backfill material flows out from the base ends of the front and rear hollow rods 141 ', 141' only when the hollow rods 141 in the middle part are sufficiently filled from the hollow rods 141 ', 141' in front and rear. At this time, the gap between the existing aging pipe 2 and the lining pipe 3 in a certain section can be filled with the backfill material.

FIG. 4 is a cross-sectional view showing another example of the existing pipe rehabilitation method of the present invention, together with another example of a supporting device used. The shoring device B shown in FIG. 4 is used for an existing deteriorated pipe 2b and a lining pipe 3b having a substantially square cross section.

The octagonal annular frame 1b of the support device B is composed of a plurality of main members 11b and a bent joint 12b, and both ends of the main member 11b are inserted and fitted into the sockets of the bent joint 12b. Thereby, an annular frame 1b is formed. Other structures are the same as those described with reference to FIG.

The annular frame 1b of the shoring device B has the structure shown in FIG.
The same support means (not shown) as shown in FIG.
Is provided. The hollow rod 15 is provided on its outer surface with a male screw which is screwed into a screw hole provided in the main member 11b of the annular frame 1b, and is rotatable from the inside of the annular frame 1b toward the injection hole of the lining tube 3b. And
A backfill discharge port 152 is provided near the distal end.
A valve 42 of the hose 4 can be connected to a connection port 151 at the base end of the hollow rod 15 via a coupler 41.

As shown in FIG. 4, the support device B of the present invention
Is inserted into the lining pipe 3b newly installed in the existing aging pipe 2b, and the annular frame 1b of the support device B is supported on the lining pipe 3b by supporting means (not shown).

In this example of the existing pipe rehabilitation method,
As shown in FIG. 5, three or more hollow rods 15 ', 15,
15 'are arranged in the longitudinal direction of the lining tube. The valve 42 provided at one end of the backing material supply hose 4 is connected to the connection port 151 at the base end of the hollow rod 15 in the middle part, and the base ends of the front and rear hollow rods 15 ', 15' are opened. deep.

In such a state, as shown in FIG. 5, by opening the valve 42, the hollow rod 15 at the intermediate portion is opened.
The backfill material such as mortar is discharged in the direction of arrow c from the backfill material discharge port 152 near the front end, and the backfill material arrow d from the base end of the backfill material from the front and rear hollow rods 15 ', 15'. The backfill material is filled into the gap between the existing aging pipe 2b and the lining pipe 3b while checking the outflow state in the direction.

As a result, the backfill material flows out from the base ends of the front and rear hollow rods 15 ', 15' only when the hollow rods 15 ', 15' are fully filled from the hollow rod 15 in the middle part. At this time, the gap between the existing aging pipe 2 and the lining pipe 3 in a certain section can be filled with the backfill material. The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration of the present invention is not limited to the illustrated embodiment.
Design changes that do not depart from the gist of the present invention are included in the present invention.

[0030]

Since the existing pipe rehabilitation method of the present invention is as described above, there is no need to attach and remove the mounting member for the backfill material injection nozzle, and the existing pipe in a certain section is not required. The gap between the lining tube and the backing material can be sufficiently filled.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of an existing aging pipe rehabilitation method of the present invention together with an example of a shoring device used therein.

FIG. 2 is a cross-sectional view showing an example of a strip used for forming a new lining pipe according to the present invention.

FIG. 3 is an explanatory diagram of an existing pipe rehabilitation method of the present invention using the support device shown in FIG. 1;

FIG. 4 is a cross-sectional view illustrating an example of an existing deteriorated pipe rehabilitation method of the present invention together with an example of a support device used therein.

5 is a cross-sectional view illustrating another example of the existing pipe rehabilitation method of the present invention using the support device shown in FIG.

FIG. 6 is an explanatory view showing a conventional old pipe rehabilitation method.

FIG. 7 is an explanatory view showing a conventional existing pipe rehabilitation method.

[Explanation of symbols]

 A, B Supporting equipment 1, 1b Annular frame 2, 2b Existing aging pipe 3, 2b Lining pipe 4 Hose 11, 11b Main member 12, 12b Bend joint 13, 14, Support means 15, 15 ', 141, 141' Hollow rod 31 injection hole 41 coupler 42 valve 151, 1411 connection port 152, 1412 discharge port 131 rod 132 rod receiver

Claims (1)

[Claims] 1. An existing pipe rehabilitation using a supporting device including an annular frame inserted into a lining pipe newly installed in an existing aging pipe and supporting means for supporting the annular frame in the lining pipe. In the method, the supporting device includes a hollow rod provided with a male screw on an outer surface screwed into a screw hole provided in the annular frame, and the hollow rod is rotated to rotate the hollow rod inside the annular frame. The hollow rod is provided with a backing material discharge port near the outer end of the hollow frame, and a backfill material supply port is provided at a base end inside the hollow frame of the hollow rod. Using a hose provided with a connection port that can be connected to one end of the hose, insert the shoring device into the lining pipe newly installed in the existing aging pipe,
The annular frame is supported in the lining tube by a support means, and three or more hollow rods are arranged in the longitudinal direction of the lining tube, and their tips are inserted into the injection holes of the lining tube, and the hollow rod in the middle portion is formed. The backing material supply hose is connected to the connection port at the base end of the hollow rod, and the base ends of the front and rear hollow rods are left open, and the backing material discharge port near the front end of the hollow rod at the intermediate portion is used. And filling the gap between the existing deteriorated pipe and the lining pipe with the backfill material while checking the filling state from the outflow state of the backfill material from the base ends of the front and rear hollow rods. Aged pipe rehabilitation method characterized by the following.