JPS596983B2 - Sewer pipe repair method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a repair method for inspecting joints of sewer pipes such as Hume pipes and concrete pipes and repairing cracks. The present invention relates to a method for repairing a sewer pipe having a pipe diameter as large as possible.

As is well known, the penetration rate of public sewage systems in Japan is far lower than that of Western countries, and the current situation is that only about 30 sewer systems have been installed domestically. It is.

On the other hand, due to the fear of low branch techniques due to a lack of skilled technicians, insufficient budget for the construction of wire, etc., in conventional wire construction, the joints of the pipe bodies are almost incomplete, that is, after the construction of the wire, Without proper geometry, gaps were created at the joints, which caused various problems.

In other words, if groundwater is located higher than the pipe or the water pressure is high, it may enter the pipe through an incomplete joint, and the waste water, including this intrusion, will be discharged at the final treatment plant. Aeration treatment, chemical treatment, etc. were recommended, and the beneficiary residents had to bear the extra treatment costs.

In addition, if groundwater is located at a location lower than the culvert, or if the soil outside the culvert has a low moisture level, it may leak out of the culvert through imperfect joints, and this leakage may contaminate the soil and groundwater. This has had a negative impact on the human body both directly and indirectly.

As mentioned above, if underground water intrusion or sewage leakage b5 is detected, there would be no problem if it could be easily repaired, but in reality this cannot be done easily. is the reality.

In other words, the sewage contains not only feces and small water, but also other domestic wastewater, various bacteria generated from these, etc.) Therefore, the transparency is extremely low by 1 degree, and this requires a great deal of labor and expense to repair. It takes time, and it is difficult to confirm whether complete repair has been achieved, and this tendency is even more severe when the flow rate is high.

The present invention has been made with attention to the above points, and its purpose is to carry out repairs and inspections without interrupting the flow of sewage in the pipes, that is, without interrupting the flow of wastewater within the pipes, i.e., while maintaining the function of the sewer pipes. Another object of the present invention is to provide a method for repairing sewer pipes, which can drain a limited amount of sewage accumulated in the small frame body, dog frame body, and middle frame body to the outside of the said frame body by pumping up. The purpose is to provide a method for repairing sewer pipes, which makes the inside of the frame empty, thereby allowing easy, quick, and good repair and inspection.Another purpose is to reduce costs by simplifying the structure. To provide a method for repairing a sewer pipe, which can be carried out at a low cost and the total repair cost can be reduced.

Next, an example of the present invention that can achieve the above object will be described in detail with reference to the accompanying drawings.

Reference numeral 1 designates a small frame body, which is composed of a back plate 11 and left and right side plates 12, as shown in Figs. 1 to 3, and a line connecting the front and lower surfaces of the left and right side plates 12 is formed in an arc shape. That is, the arcuate edge 12
aQ5 is formed.

Further, the left and right side plates 12 of this small frame body 1 are formed approximately in the shape of a circle.

13 indicates a packing plate, which is connected to the arcuate edge 12
It is attached to the lower edge of the back plate 11 starting from a.

2 indicates a large frame body, and as shown in FIGS. 4 to 6, there are left and right side plates 21 whose arcuate edges 21a are lines connecting the front and rear surfaces to the bottom surface, and a water pipe 22 connected near the bottom between the left and right side plates 21. and a plurality of connecting rods 23 connecting the left and right side plates 21,
The left and right side plates 21 are formed in the shape of approximately 1 yen.

Further, a packing plate 24 is attached to the arcuate edge 21a.

In Figures 7 and 8, P is a pipe, 1 is a small frame body, 2 is a dog frame body, and 3 is a tightening machine, and the tightening machine 3 in this example is a turnbuckle. The model is used in

That is, 31 and 32 are screw rods, 33 is a rotating pipe 34 which is a contact plate to the pipe conduit P, and 35 is a press plate for the small frame body 1 and the large frame body 2; In the case of a dog frame 2, it is formed so as to abut from the upper edge of the back plate 11 to the back surface and the upper edges of the left and right side plates 12, and in the case of the dog frame 2, it is formed so as to abut on the upper edges of the left and right side plates 21. has been done.

4 indicates the middle frame body, and as shown in FIGS. 9 and 10, the front and rear plates 41
and a left and right side plate 42, and a lower part 42 of the left and right side plate 42.
a is formed in an arc shape, and a lower part 42a forming an arc shape
and a packing plate 43 at the bottom of the left front and rear plate 41.
b5 is attached.

In FIG. 11, P indicates a pipe, 4 indicates a middle frame body, and 3 indicates a tightening machine 05 similar to that shown in FIGS. 7 and 8 described above.

Next, explaining the repair method, when using the small frame body 1, as shown in FIG. At the same time, the packing plate 13 is pressed against the circumferential side by the tightening machine 3.

In such a case, the inside of the small frame 1 is blocked from the sewage flow S by the back plate 11 and left and right side plates 12, and the sewage flows around the outside of the small frame 1.

Next, the sewage accumulated in the small frame body 1 is pumped up and discharged to the outside of the small frame body 1 to make the interior empty, and then it enters the small frame body 1 or flows outside the small frame body 1. After completing the repair work, the small frame body 1 is moved to the opposite side and repaired in the same manner as described above.

In the case of using the large frame body 2, as shown in FIG. Pressure contact.

In this case, the space between the left and right side plates 21 is cut off from the sewage flow S, and the sewage flows through the water pipe 22.

Next, after pumping up the sewage accumulated between the left and right side plates 21 and discharging it outside the large frame body 2 to make the interior empty, it enters the large frame body 2 or repairs from the outside of the large frame body 2. It is.

When the inner frame 4 is used, the packing plate 43 of the lower part 42a having an arc shape is brought into contact with the center of the inner bottom of the pipe P as shown in FIG. .

In this case, the inside of the middle frame body 4 is cut off from the wastewater flow S, and the wastewater flows through the outside of the middle frame body 4.

Next, repairs are carried out in the same manner as in Figures 7 and 8, but when using any of the above-mentioned small frame 1, large frame 2, and middle frame 4, not only repair but also inspection is required. This can sometimes be done as well as during repairs.

Figures 12 to 15 show examples in which the members constituting the small frame 1, the large frame 2, and the middle frame 4 can be disassembled and reassembled, thereby facilitating entry and exit through a manhole. 1, the left and right side plates 12 are separably and watertightly fitted into grooves 11a formed in the back plate 11, and in the large frame 2, water pipes 22 are fitted in through holes 21a and 2lb formed in the left and right side plates 21. The connecting rod 23b'5 is separably and watertightly fitted to the connecting rod 23b'5.

Further, in the middle frame body 4, left and right side plates 42b3 are separably and watertightly fitted into grooves 41a formed in the front and rear plates 41.

The groove 11a, the through holes 21a and 2lb, and the groove 4 provided in the front
In either case of 1a, a rubber packing is fitted inside these so that watertightness is maintained.

In addition, in the case where the packing plate 13 of the small frame body 1 is configured to be disassembled and assembled in this manner, the packing plate 13 of the small frame body 1 is divided into three parts, and the middle frame body 4 is divided into three parts.
The packing plate 43 is divided into four parts, and the ends of the divided parts are each formed into a thin shape with a thickness of ↓2, and the thinly formed parts are overlapped with each other to achieve watertightness. ing.

Furthermore, the tightening machine 3 may be of a turnbuckle type as shown in the illustration, but may also be a set of hydraulic or pneumatic fluid cylinders.

In addition, in the present invention, a drain pipe for inspection is provided at the upper part of the back plate 11 of the small frame body 1 or the left and right side plates 12 at one place where the back plate 11 or the left and right side plates 12 fall, and the drain pipe is connected to the inside of the small frame body 1 from the pipe. In some cases, the amount of water leakage can be inspected.

In other words, as the level of leakage water rises, the amount discharged from the drain pipe is received in a beaker, and by determining the amount and time that it flows into the beaker, for example, if 5 cc flows in in 1 minute, 300 cc in 1 hour. It turns out that there is a water leak.

(Note: The amount of water leakage 03 mentioned above is determined in relation to the contact area of the packing sheet 13 with the pipe and the volume of the small frame body 1 below the inner hole of the drain pipe.

Since the present invention is constructed as described above, it is possible to achieve effects such as being able to carry out repairs and inspections easily, quickly, efficiently, and at low cost while maintaining the function as a sewer pipe.

[Brief explanation of the drawing]

The drawings show an example of the method of the present invention, in which FIG. 1 is a plan view of a small frame, FIG. 2 is a side view of the same, FIG. 3 is a front view of the same, and FIG. 4 is a plan view of a large frame. Figure 5 is a side view of the same as the above, Figure 6 is a front view of the same as the above, Figures 7 and 8 are explanatory diagrams at the time of repair, Figure 9 is a plan view of the middle frame, and Figure 10 is the same as the above. FIG. 11 is an explanatory diagram at the time of repair, FIGS. 12 to 15 are examples of a structure that can be assembled and disassembled, FIG. 12 is a plan view of a small frame body, and FIG. 13 is a plan view for a large frame body,
FIG. 14 is a plan view of the middle frame body, and FIG. 15 is a partially longitudinally sectional front view of the same. 1-... Small frame body, 11... Back plate, 12a
-...Arc-shaped edge, 12-...Right and left side plates, 1
3-... Packing plate, 2-... Large frame body, 21... Left and right side plates, 21a-... Arc-shaped edge, 22... Water pipe , 23-...Connecting rod, 24-...Packing plate, 4-...
・Middle frame body, 41...Front and rear plates, 42...
Left and right side plates, 42a... lower part, 43...
packing plate.

Claims (1)

[Scope of Claims] 1. An arc 1-shaped edge formed by a front edge and a lower edge connected thereto is connected by a back plate to the backs of left and right side plates formed into approximately 1 of a circle, and the arc-shaped edge Using a small frame body with a packing plate fixed to it, it is brought into contact with the lower half of the inside of the pipe at the location that requires repair via the packing plate, and is pressed against the pipe by a tightening machine. Then, the sewage is allowed to flow through the outside of the back plate and the left and right side panels, and the sewage accumulated inside the small frame body is discharged into the flowing sewage using a pump, and repair work is carried out. The left and right side plates having arcuate edges approximately in the shape of an i are connected by a plurality of connecting rods and connected near the bottom via a water pipe, and packing plates are fixed to the arcuate edges of the left and right side plates. Using a large frame body, contact the lower half of the inner side of the pipe via a packing plate, and press it against the pipe with a tightening machine to prevent wastewater from flowing through the water pipe. The middle frame is constructed by draining accumulated waste water using a pump for repair, and connecting left and right side plates with arcuate lower edges by front and rear plates, and fixing packing plates to the front and rear edges and the lower parts of the left and right side plates. The pipe is pressed against the central part of the inner bottom of the pipe through a packing plate, and the tightening machine is used to press the pipe against the pipe, preventing the sewage from flowing outside the middle frame. The small frame body, the large frame body,
A sewer pipe repair method characterized by repairing while appropriately using the middle frame body.