JPH02285123A - Renewing construction for obsolete manhole - Google Patents

Abstract

PURPOSE:To easily renew a manhole by insetting a pipe with a U-shaped notch, into the manhole, to set the U-shaped notch section to be received by a regenerated pipe, and by cutting the upper side surface of the regenerated pipe to be opened, to fill up a space with a filler. CONSTITUTION:The lower end section 3A of the pipe 3 of an outer diameter D slightly smaller than the inner diameter of a manhole is provided with a U-shaped notch section 4 for receiving a regenerated pipe 1. After that, the pipe 3 is inserted into an obsolete manhole 2 and is set to cross over the regener ated pipe 1. After that, previously on the upper side section of the pipe 1, an opening section 1A is formed to be cut, or after the pipe 3 is inserted into, the opening section 1A is formed to be cut. Then, the internal surface of the pipe 3, and both the side surfaces and the bottom surface of the pipe 1 are filled up with the filler of mortar or the like. As a result, work for excavating peripheral earth is not required, and the term of construction can be shortened.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a method for renewing old manholes.

[Conventional technology]

Conventionally, when replacing old pipes, a construction method has been widely adopted in urban areas in which a new pipe is inserted into the old pipe without digging up the old pipe, thereby renewing the pipe.

[Problems with conventional technology]

By the way, if the manholes placed at key points along the pipeline also become obsolete, the method of updating these parts is to dig them up and replace them with new manholes, as in the conventional construction method. , construction is often difficult due to traffic obstacles, land use restrictions, etc.

[Problem to be solved by the invention]

This invention was made in view of the above-mentioned problems, with the aim of providing a construction method that can quickly renew manholes while minimizing the construction area when a replacement pipeline is laid.

[Technology that led to solving the problem]

That is, the method for renewing a dilapidated manhole of the present invention is a manhole for a rehabilitated pipeline in which a rehabilitated pipe is inserted into an existing dilapidated pipe. Inserting a pipe provided with a U-shaped notch into the manhole, receiving the rehabilitated pipe in the U-shaped notch, and incising the upper surface of the outer periphery of the rehabilitated pipe,
It is characterized in that a filler is filled in the gaps between both sides and the lower surface before correction and the inner surface of the tube.

〔Example〕

Next, the present invention will be explained in detail.

FIGS. 1 to 4 are explanatory diagrams showing the state of implementation of this invention.

In FIG. 1, the rehabilitation pipe l has been laid in advance so as to pass through the lower part of the aged manhole 2.

When renewing this manhole 2, first remove the scaffolding 2A...2A etc. that protrudes into the old manhole 2, and
A tube 3 is prepared, and as shown in FIG. 2, a U-shaped notch 4 for receiving the repaired tube 1 is formed in the lower end 3A of this tube 3.

Next, this pipe 3 is inserted vertically into the aged manhole 2 and placed so as to straddle the rehabilitated pipe 1, as shown in FIG.

At this time, an opening IA may be previously cut in the upper side of the rehabilitation tube 1, or the opening IA may be cut after the tube 3 is inserted.

Thereafter, as shown in FIG. 4, the inner surface of the pipe 3 that will become the renewed manhole, and both sides and bottom of the repaired pipe 1 are filled with a filler 5 such as mortar.

As a result, the old manhole 2 will be renewed.

In addition, the pipe 3 that will become the updated manhole 2 is a pre-formed F.
It is also possible to use a W tube or a Huum tube with scaffold projections 3B...3B formed on the inner surface in advance.

Moreover, in FIG. 4, 6 is a waterproof material filled between the pipe 3 and the repaired pipe 1, and putty epoxy or the like is used. Further, 7 indicates a filling material filled between the pipe 3 and the inner surface of the aged manhole 2, and is filled with mortar or air mortar.

[Effect]

In the present invention, the old manhole 2 is repaired by the pipe 3 inserted therein and fitted into the upper part of the repair pipe 1, so that water leakage in the manhole portion is also prevented.

〔effect〕

As explained above, when renewing an old manhole, this invention only requires inserting a new pipe into the old manhole, so there is no need to dig up the surrounding earth and sand, and the construction period is very short. After inserting the manhole, all the work is done inside the manhole, so there is no risk of causing traffic disturbances in the surrounding area.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a dilapidated manhole, Fig. 2 is a perspective view of a pipe that will become a rehabilitation manhole, Fig. 3 is a cross-sectional view showing the inserted state of the pipe, and Fig. 4 is a cross-sectional view showing the protruding state. /[ffi

Claims (1)

[Claims] (1) In a manhole for a rehabilitated pipeline that is constructed by inserting a rehabilitated pipe into an existing aging pipe, the manhole has an outer diameter slightly smaller than the inner diameter of the manhole, and a U-shaped notch is provided at the lower end to receive the outer surface of the rehabilitated pipe. The repaired pipe is inserted into the manhole, the repaired pipe is received in the U-shaped notch, the upper surface of the outer periphery of the repaired pipe is incised, and the gap between both sides and lower surface of the repaired pipe and the inner surface of the pipe is filled. A method for renewing aging manholes characterized by filling them with filler.