JPH0718189B2 - Old manhole renewal method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a method for renewing an aged manhole.

[Conventional technology]

Conventionally, when renewing an aged pipe, a new pipe is directly inserted into the aged pipe without excavating the aged pipe, and a method of renewing the pipeline is widely adopted in urban areas.

[Problems of conventional technology]

By the way, when the manholes that are placed at important points along the pipeline are also deteriorated at the same time, renewal of this part is not done by excavating the manhole part and replacing it with a new manhole as in the conventional method. However, construction is often difficult due to traffic obstacles and land use restrictions.

[Problems to be Solved by the Invention]

In view of the above problems, the present invention has been made for the purpose of obtaining a construction method capable of quickly renewing a manhole at the same time with a minimum construction area when a renewal pipeline is laid.

[Technology that has solved the problem]

That is, according to the method for renewing an aged manhole of the present invention, in the manhole of the rehabilitating pipe in which the rehabilitating pipe is inserted and disposed in the existing aged pipe, the manhole has an outer diameter slightly smaller than the inner diameter of the manhole and the lower end receives the outer surface of the rehabilitating pipe. A tube provided with a U-shaped cutout is inserted into the manhole, the straightening tube is received in the U-shaped cutout portion, and the outer circumferential upper surface of the straightening tube is incised, and both sides and the lower surface of the straightening tube, A filling material is filled in a gap between the inner surface of the pipe and the inner surface of the pipe.

〔Example〕

 Next, an embodiment of the present invention will be described.

1 to 4 are explanatory views showing an embodiment of the present invention.

In FIG. 1, the straightening pipe 1 is laid in advance so as to penetrate the lower part of the aging manhole 2.

When renewing this manhole 2, first, scaffolds 2A ... 2A protruding into the old manhole 2 are removed, and a pipe 3 having an outer diameter d slightly smaller than the inner diameter D of this manhole 2 is prepared. As shown, a U-shaped notch 4 for receiving the straightening tube 1 is formed at the lower end 3A of the tube 3.

Next, the pipe 3 is vertically inserted into the aging manhole 2 and is arranged so as to straddle the correction pipe 1 as shown in FIG.

At this time, the opening 1A may be preliminarily incised in the upper portion of the rectification tube 1, or the opening 1A may be incised after the tube 3 is inserted.

Thereafter, as shown in FIG. 4, a filling material 5 such as mortar is filled on the inner surface of the tube 3 which will be a renewal manhole and both side surfaces and the bottom surface of the correction tube 1.

As a result, the old manhole 2 is renewed.

In addition, the pipe 3 that becomes the renewal manhole 2 is a preformed FW
Tube or fume tube is used, and the scaffolding protrusion is previously formed on the inner surface.
It is also possible to use a preformed 3B ... 3B.

Further, in FIG. 4, 6 is a waterproof material filled between the pipe 3 and the calibration pipe 1, and putty epoxy or the like is used. Reference numeral 7 denotes a filling material filled between the pipe 3 and the inner surface of the aging manhole 2, which is mortar or air mortar filling.

[Action]

In the present invention, the aging manhole 2 is rectified by the pipe 3 inserted therein and is fitted into the upper portion of the rectification pipe 1, so that water leakage and the like at the manhole portion is also prevented.

〔effect〕

As described above, when the old manhole is renewed, since it is only necessary to insert a new pipe into the old manhole as described above, the work of excavating the surrounding earth and sand is completely unnecessary, the construction period is very short, and the repair pipe is After inserting, all you have to do is work in the manhole, so there is no danger of causing traffic problems in the surroundings.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an old manhole, FIG. 2 is a perspective view of a pipe to be a repair manhole, FIG. 3 is a cross-sectional view showing an inserted state of the pipe, and FIG. 4 is a cross-sectional view showing a protruding state.

Claims (1)

[Claims] Claim: What is claimed is: 1. In a manhole of a rehabilitating pipe, in which a rehabilitating pipe is inserted and arranged in an existing aged pipe, an outer diameter slightly smaller than the inner diameter of the manhole and a lower end of which receives the outer surface of the rehabilitating pipe
Insert the tube with the character notch into the manhole,
An aging characterized by receiving a straightening pipe in a U-shaped notch portion, cutting out the outer peripheral upper surface of the straightening pipe, and filling a gap between both sides and lower surface of the straightening pipe and the inner surface of the pipe. Manhole renewal method.