JP2021179159A - Repairing method of medium and large diameter pipelines using the same materials - Google Patents

Abstract

To provide an economical and safe repairing method of pipelines for repair and rehabilitation of pipelines of small to large diameters, in which a formwork is made of a flexible material, and which is possible to use the same or the same system of material as the pipeline by using a multi-pump.SOLUTION: A highly flexible, free-standing, simple formwork 6, to which filling nozzles 4, filling pipes 2 and adjusting jacks are pre-attached without being assembled on site, is adjusted in size using an adjustment jack and transported to a repair point of an existing pipe 9, and, after mounted and set up, is connected to a filling pipe 2 to repair and rehabilitate by press-fitting the same system of material as the existing pipe 9.SELECTED DRAWING: Figure 1

Description

The present invention relates to the simplification of repair / repair of existing pipelines that have deteriorated over time, cracked or damaged.

As a method of repairing small and medium diameter pipes, crimping and hardening of reinforcing materials have been widely used.
However, these methods require specialized skills and knowledge, and also require specialized machines and equipment, so there was a problem with widespread use.

Further, since the reinforcing material is a resin-based material, the strength is maintained by being the same as that of a plastic-based material such as vinyl chloride. In addition to being supported only by strength, separation and peeling occur between the resin and different materials because they are not identified.
In addition, since it is a special material and construction method, the construction cost tends to be very expensive, and sometimes it is more expensive than the excavation work to be newly constructed by excavation.

With the conventional construction method, the construction time is much shorter than the excavation work, but unless the construction situation is too much, the excavation work is the mainstream, and the expensive construction cost is borne by the national and local governments, which hinders the spread. There is.
In addition, since it is difficult to excavate and construct a new excavation work due to a shortage of personnel nationwide, it does not require special materials, technology, or equipment, and it can be repaired easily, quickly, and cheaply with materials that are ubiquitous and equipment that is ubiquitous. It is made to be able to do.

JP 2011-143608

"Catalog of pipeline rehabilitation method", Kubota-Chemix Co., Ltd.

According to the above construction method, when repairing a pipe that has deteriorated or damaged over time, it is expensive because it is repaired from the inside, so there is no need to excavate soil or the facility cannot be used for a long period of time. It was evaluated, but it is not without problems.

The construction method of the present invention does not lose the good points of those rehabilitation construction methods, and also comes from the peculiarities that are the disadvantages of those construction methods, without the need for special technology, special materials, or special equipment. It eliminates the high construction cost, and provides the ability to construct with simple knowledge and technology without the need for special equipment with general materials.

In the construction method according to the present invention, a self-standing simple formwork 6 (hereinafter referred to as a formwork) made of a highly flexible and elastic material is processed as shown in drawings and the like, and is contracted by an adjustment jackie 7 to a place to be repaired. It is carried by the special carrier 14 of FIG. 7 developed from the above, the injection position is confirmed at the injection port, the adjustment jackie 7 is extended and fixed, the filling pipe 2 is attached, and then the repair material is injected by the pump.

Effect of the present invention

In the present invention, since the repair material can be a general material conforming to the existing piping, it is inexpensive and easy to procure, and since the same or similar material as the existing piping can be used, the strength is increased. Separation / peeling can also be prevented.
In addition, as shown in Fig. 9, when earth and sand flow out around the pipe, the material can be press-fitted and filled into the space, but with other rehabilitation methods, the space remains as it is just by putting a repair material on the inner surface of the pipe, so there is a risk of collapse. There is a problem with the remaining safety.

In addition, since no special technology is required, it is easy to secure workers, and since no special materials or equipment is required, it is possible to reduce costs and personnel, and since the materials are also general materials, the final cost is significantly high. Is suppressed.
Of course, unlike excavation work, the equipment cannot be used for a long period of time, and the work is simplified, so the construction period can be greatly shortened.

Three views when installing the filling pipe in the existing pipe Cross-sectional view of the installation status of the formwork in the existing piping Side view of filling port and filling pipe, etc. Cross-sectional view of the inner and outer surfaces of the formwork at the time of installation Side view and front view of formwork and how to use the valve Adjustment Jackie installation drawing Three views of the transport bed for the inside of the pipe Damage situation diagram of existing Hume pipe (example) Repair status diagram of existing Hume pipe (example) Formwork production drawing Explanation of construction method Explanation of construction method

1 and 5 to 9 show examples of the pipe repair method according to the present invention.
As for the structure and configuration, a self-supporting simple formwork 6 having a cylindrical shape made of a highly flexible and elastic material with a size that matches the pipe diameter of the existing pipe 9 and an X-shaped fixing adjustment on both ends of the formwork 6 It has a structure in which a jackie 7 is attached and a repair material is press-fitted / filled with a pipe 2 and a valve 3.5.

At the parts requiring repair of the existing pipe 9, as shown in FIG. 11, the circular form 6 made of a highly flexible and elastic material is cut and processed to a size suitable for the diameter of the existing pipe 9, and the adjustment jackie 7 is formed. After mounting, the adjustment jackie 7 is reduced, the diameter of the formwork 6 is reduced, the formwork 6 is carried to the required repair location by the special carrier 14, the installation position is confirmed using the filling port, and then the adjustment jackie 7 is extended and the formwork is extended. 6 is fixed.

After attaching the filling pipe 2 and the valves 3 and 5 to the fixed form 6 as shown in FIGS. 11 and 12, the pump and the filling pipe 2 were connected and selected using the filling hose 1. The repair material is press-fitted and filled with a pump. (The pump described in Japanese Patent No. 4604281 is accurate.)

1 Filling hose 2 Filling pipe 3 Stop valve 4 Filling nozzle 5 Inspection valve (also used as an emergency auxiliary valve)
6 Self-supporting simple formwork 7 Adjustment Jackie 8 Adjustment frame 9 Existing piping 10 Joint 11 Flange 12 Jackie base 13 Formwork joint 14 Special carrier 15 Wheels

Claims (6)

By making the formwork with flexible material, it can be expanded and contracted for easy handling, and by using a multi-pump that simultaneously sucks and pumps various materials, it cracks due to deterioration of the pipeline. A construction method that features easy construction with the same pipeline and one material regardless of the type and size of the pipe. A construction method that simplifies construction by manufacturing formwork from flexible materials. A method of rehabilitating pipelines using a multi-pump that simultaneously sucks and pumps various materials. Rehabilitation construction method for pipelines that supports various sizes and materials regardless of the dimensions and materials of the pipeline. A pipeline rehabilitation construction method that is characterized by the fact that it is simplified and the construction time can be shortened by using a flexible material. A construction method that uses a special arc-shaped bedboard for transporting supplies or moving workers at circular (tube-shaped) construction sites such as pipelines.

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