JPS60258339A - Connection of attachment pipe to underground pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for connecting an attached pipe such as a domestic drain pipe to an underground pipe such as a main drain pipe.

``Prior art'' When attempting to connect an attached pipe such as a household drain pipe to an underground pipe (main pipe) such as a main drainage pipe, conventionally, the main pipe was located 2 to 3 feet from the ground surface. When buried at a depth of 3 m, the diameter of the cut opening is usually small and the depth of the hole is shallow.
As shown in Figure 8, excavation was carried out (Figures a and b) to expose the connecting part 3 of the main pipe 2, and while looking directly at it by getting down there,
Connect the mounting pipe 5 using mortar 4 (Figures c and d) and backfill it (Figure 8), but if it is buried at a depth of 4 to 5 m or more, the diameter of the cut-out opening The first step is to build a 2 to 3 m. A spare pipe is buried at the bottom level of the hole to connect to the manhole to which the main pipe is connected, and then a mounting pipe is connected to the spare pipe. The attached pipe is bypassed and connected to the main pipe via a pipe and a manhole.

``Problems to be solved by the invention'' However, although excavation in the above-mentioned method is essential for reliable connection work, due to severe housing conditions, etc.
There may be cases where even a depth of 3m is not permissible,
In addition, it is originally an expensive work, and especially in the case of 4 to 5 m, the cost of bypass piping is added as described above.

``Means for Solving Problems'' The present invention was developed in view of the circumstances on paper, and its gist is that the drilling position on the ground surface is determined by positioning signals from sensors such as television cameras placed in the main pipe. After deciding,
Use a polling machine to drill a hole up to the main pipe position, then replace the cutting blade and drill a hole in the main pipe to match the diameter of the attachment pipe, which is smaller than the diameter of the perforation. After removing the polling machine, remove the hole from the hole to the attachment pipe. Insert the tip into the hole to make a temporary connection, then pour the gap filling fixing material to a predetermined height rising from the temporary connection to fix it, and backfill with soil above it. Inside the pipe, a coagulant injection seal using a pipe leak sealing bunker is attached to the connection part, and the pipe opening is plugged with a water stop plug. - Connection of the attached pipe to the main pipe without requiring an incision The point is that it made it possible.

"Effect", "Example" This will be explained in detail below based on the drawings.

That is, FIGS. 1 to 6 show the construction procedure of the present invention,
First, a positioning signal is sent to the ground surface from a sensor installed in a television camera 3° placed in the main pipe 2, and the drilling position by the polling machine 31 is determined (FIG. 1).

Drill a hole 32 with a polling machine 31 up to the main pipe 2 position (second
figure).

In this case, if there are defects such as cavitation due to water leakage or soft ground at the part where the main pipe 2 is buried, 4 in front of the main pipe 2
It is advisable to stop drilling at a depth of 0 to 50 cm and perform root hardening by injecting cement milk or chemical solution.

Next, replace the cutting blade with a smaller diameter one that matches the diameter of the mounting pipe 5", make a hole in the main pipe 2, remove the polling machine 31, insert the mounting pipe 5" through the hole 32, and cut the tip of the cutting blade. into the hole to make a temporary connection (Fig. 3).

A predetermined height (40 to 50ca) from the temporary connection part.
A gap-filling fixing material 33 such as mortar is poured into the gap (about 100 mm) to fix it (Fig. 4), and at the same time, soil is backfilled above it (Fig. 5).

On the other hand, a leak sealing backer 34 is arranged inside the main pipe 2, and a water stop plug 35 made of a pneumatic expansion bag or the like is dropped into the opening of the mounting pipe 5 to seal it. After that, a coagulant is injected and sealed, and the connection is plugged from the inside to complete the main connection (Fig. 6).

The above-mentioned television camera 30 and pipe leakage sealing bunker 34 are both existing devices that move inside the main pipe 2 by being pulled by a wire 36, and the explanation will be as follows.

That is, in order to conduct an internal inspection of the pipe line for flaws or fundamental damage within the main pipe, a sealed camera, such as a television camera, equipped with an illumination unit and moved inside the pipe line has been devised. Once a crack or sprue in the pipe is found and its exact location is shown, a hole is drilled near the sprue and the coagulant is pumped through the conduit.
The sprue can be repaired by sealing the pipe.

As such a pipe leakage sealing machine, for example, the Japanese Patent Publication No. 51
-16650. The leak sealing machine has a pair of hollow casings covered with air-tight inflatable skins, and a skid is installed adjacent to one end of each skinned casing. and the other end of each casing is placed opposite the center ring. Connecting devices such as bolts are threaded through hollow sections of the casing from one skid to the other, bolting the entire device together. The inflatable skin covering the casing is closed at both ends by tightening the skinds together, and the skid is closed by tightening the diagonally serrated edges of the distal end of the casing. The skins, along with the overlapping sections, are tightened to each casing.

The overlapping portions of the skids are angled from the distal end of the casing and are tightened to uniformly press the skin against the diagonally serrated edges of the casing. On both sides of the center ring,
They have similar overlapping edges for simultaneously tightening and sealing the other end of the inflation skin to the other end of each casing in the same manner. The unit can be easily disassembled by loosening the bolts that pass through the skids, and worn and damaged parts can be replaced and replaced.

It can be assembled by tightening the bolts. Accordingly, there is no need to cut the inflatable skin to avoid the common trouble of tearing or abrasion of the inflatable skin in situations where the inflatable skin is rapidly manipulated. Air is compressed and directed through the casing, expanding the inflatable skin and creating a space between the center ring and the interior of the tube.

Air is also blocked by a pair of inflatable skins and a rapidly solidifying crouching agent is pumped through the center ring for sealing action, as shown in FIG. 7 in tube 11. This bunker 10
FIG. Here, the pair of skins 12 in the inflated state are normally flat annular skins or sleeves, but they are bags that are immediately inflated by air pressure. At each end of the packer 10 there are skin eyes 3 and 14 with a plurality of skid legs for sliding the packer 10 into the tube 11 without inflating the skin 12. A center ring 16 is placed between the inflatable skins 12 and has a pair of medicinal fluid outlets 17 attached thereto.

A hose 18 with a coupling device 20 is shown entering one end of the packer IO and connects to and passes through the casing 1 located below the skin 12.
Air pressure or other fluid pressure lines. However, this casing is not visible in this view. Thus, by pumping pressure through hose 18, the two skins 12 simultaneously expand and contract simultaneously. A pair of other hoses 21 and 22 are also shown entering the bunker 10 and pass tarauching chemicals to seal flaws and sprues within the tube 11.

Hoses 18. 21 and 22 are pipes 11, which are mostly underground pipes.
The hose 18 leads to the surface or entrance of an underground pipe where equipment for delivering pneumatic and chemical agents to the hoses 21 and 22 is located.

The chemical agent entering the hoses 21 and 22 passes through the chemical outlet 17 and the ring 16 to the tube 11. Fills the space 23 created between the ring 16 and the two skins. Bolts 24 are threaded from skid 14 to skid 13 to bolt the device together with nuts 25. This packer reliably indicates the exact location of the sprue and, if possible,
The location of the slit in the tube 11 is determined using a device such as a sealed television camera with a target to position the packer over the spot so that the ring 16 is directly above its sprue. The skin 12 is expanded by air pressure through the hose 18 to provide a space 23 blocking the sprue, and the chemical agent is under enough pressure to be forced into the sprue of the pipe. The drug is then injected through the hoses 21 and 22 and the drug solution outlet 17.

Preferably, the chemical agent quickly coagulates or solidifies, so that the packer can be moved to the next sprue location in the pipe.

"Effects of the Invention" The above-mentioned feature of the present invention is that trenching is not required.
Since no excavation is required, there are various advantages listed below.

i) Less traffic nuisance.

ii) Time can be shortened.

iii) Cost is low.

iv) Space (the space for construction may be small)■)
Construction machinery is small and simple.

vi) There are few construction workers.

[Brief explanation of drawings]

1 to 6 are procedural diagrams of the present invention, FIG. 7 is an explanatory diagram of a pipe leakage sealing machine, and FIGS. 8 a to 8 are explanatory diagrams of conventional connection procedures. Explanation of symbols 1... Cutting, 2... Main, 3... Connection, 4...
・Mortar, 5...Mounting pipe, 5'...Mounting pipe, 10
...Backer, 11...Tube, 12...Skin, 1
3.14...Skid, 16...Ring, 17...
・Medical solution outlet, 18...hose, 21.22...hose, 24...bolt, 25...nando, 30...
・TV camera, 31...Polling machine, 32...
perforation, 33... void, gap filling fixing material, 34... packer for pipe leakage sealing, 35... water stop plug, 36.
・・Wayanso 774 Ntsun l Noff, 3Δ Rira' 30 1-Pun Natsu V Nbi 0゜uβ〃 C1

Claims (1)

[Claims] After determining the drilling position on the ground surface using positioning signals from sensors such as TV cameras placed inside the main pipe, use a polling machine to drill the hole up to the main pipe position, then replace the cutting blade and install a pipe smaller than the diameter of the hole. Drill a hole in the main pipe according to the diameter of the hole, and after removing the polling machine, insert the mounting pipe through the hole and insert the tip into the hole to make a temporary connection. Pour the void filling fixing material to fix it, and backfill with soil above it.Meanwhile, inside the main pipe, install a coagulant injection seal with a pipe leak sealing packer at the connection part to seal the pipe opening. A method for connecting an installation pipe to an underground pipe, which is characterized in that it is connected to an underground pipe while being plugged.