KR200182579Y1 - Large diameter pipeline unexcavated internal repair method - Google Patents

Abstract

1.1 Field of Technology

Total repair method including part repair and middle part of large diameter pipeline

1.2 Purpose of devising

In the case of repairing the inner diameter of large diameter pipe, especially when repairing the stepped part of the joint, the purpose of reinforcing the strength of the repair material by adding stainless wire mesh in addition to the conventional basic repair material, and improving the index property by adding the cylindrical water-expandable rubber band. .

1.3 Composition of the devise

The present invention attaches a nonwoven fabric to the inner wall of both end portions of the pipeline including the joint portion of the pipeline and repairs the stainless wire mesh in a cylindrical state with the intended width of the repaired width rather than the width of the nonwoven fabric. Part of the upper part is overlapped, and the edges of both ends of the outer surface of the stainless steel wire are wrapped around the cylindrical water-expanded rubber bands. Epoxy-sprayed or applied epoxy for surface cleaning, fiber-reinforced epoxy or resin-sprayed or applied for surface treatment, and then hardened for a predetermined time and completed for the stepped and flared portions of the joints and for both ends of the joints, respectively. Stainless steel for easy installation The U-shaped groove of several millimeters depth is formed in the inner side of several centimeters from the ends of the stainless steel wire mesh and the stainless steel wire mesh so that the stainless steel wire mesh is positioned on the tension side of the repairing material so as to have the function of reinforcing the spacer and the rigidity.

1.4 Effect of Design

The present invention has the effect of reinforcing the strength of the water-retaining material and improving the indexability by additionally installing a stainless steel wire mesh and a cylindrical water-expandable rubber band when repairing the large diameter pipe.

Description

Large diameter pipeline unexcavated internal repair method

The present invention is to apply the partial repair method to the joint gap of the pipeline and the unevenness of the pipe in the relatively large diameter pipeline that the worker can enter and repair in the unexcavated internal repair method of the large diameter pipeline. This is a pipeline repair method including the entire repair method for the purpose of preventing damage, scour or corrosion due to aging and sewage flow.In addition to the basic materials used previously, stainless steel wire mesh and cylindrical water can be used. The present invention relates to a non-excavated inner surface repair method of a large diameter conduit that reinforces the strength of the repair material and improves the exponential property by adding an expansion rubber band to repair the joint part or the whole of the conduit in the conduit.

The pipelines are often subject to impact loads due to frequent upland pressure or heavy traffic, and ground subsidence may occur, resulting in soil contamination due to leakage caused by external factors. Steps and gaps are severely progressed at abnormal parts of the joint of the pipeline, and in order to cope with problems such as the pipeline being broken when these phenomena are not repaired, a relatively large diameter pipeline can be repaired by a worker. In this case, there is a method of applying only ordinary cement mortar to the repair part of the joint or applying epoxy or resin only. The first method of applying general cement mortar only includes frequent vibration of vehicles passing through the ground road where the pipeline is buried. Cement mortar is added or added by ground subsidence There is a problem that does not meet the required level, such as the dropping of Le, and the second method of repairing by applying epoxy or resin only is the same as the case of concrete without bare steel when compared to concrete, In order to minimize the loss of the passage area of sewage, it was necessary to add steel reinforcement material and improve it with high strength repairing material as in the case of reinforced concrete.

The present invention is a method for repairing a worker by entering the conduit for the entire repair method including the partial repair of the joint and the middle part of the conduit in order to correct the problems of the conventional method as described above. Although cement mortar or epoxy or resin was applied to repair the concrete, it is similar to concrete-free concrete. When repairing the inner surface of the pipeline, it is restricted to several millimeters of thickness in order to minimize the reduction of the cross-sectional area of sewage. Fiber reinforced special cement mortar or epoxy was used to reinforce the strength of the repair material as much as possible. Also, stainless steel wire mesh is advantageous to reinforce to the base shape of the pipeline, especially the stepped part, on the tension side of the fiber reinforced special cement mortar or epoxy. Add it to Reinforce the strength of the ash, and wrap the cylindrical water-expanded rubber band around the edges of both ends of the stainless steel wire mesh to improve the exponential properties in case of external vibration or impact load or ground subsidence after pipe repair. The final finishing surface of the repair material has a purpose of improving durability against wear by finishing with fiber reinforced epoxy or resin.

1 is a state in which a portion of the internal repair method is applied to the entire repair site including a partial repair site of the pipe joint and the middle of the pipeline.

FIG. 2 is a cross sectional view taken along the line A-A of FIG. 1; FIG.

FIG. 3 is a detailed view of FIG. 1B. FIG.

4 is a detailed view of FIG. 2C;

^* Explanation of symbols for main parts of the drawings

1: Pipe line 3: Pipe line part repair part

5: Overall repair part of middle part of pipeline 7: Joint grouting

9: nonwoven fabric 11,11 ': stainless steel wire mesh (wire mesh)

13: U-shaped groove 15: Cylindrical water-expandable rubber band

17: fixed wire

19: Fiber reinforced special cement mortar or epoxy

21: fiber reinforced epoxy or resin

Referring to the accompanying drawings with respect to the configuration of the subject innovation in detail as follows.

Normally, the abnormal part of the pipe line (1) has a step and a gap at the same time at the joint part, and may be aged, scoured, or broken up to the middle part of the pipe part (1). It can be divided into total maintenance for the whole maintenance part (5) including the part.

For example, in the case of a typical case, a cavity due to scour of backfilled soil due to the flow of sewage is created between the gaps of the joints, and in this part, the cavity grouting is first performed until the surface flattened with the inner surface of the pipeline 1. After 7), it is cured for a predetermined time.

When the cavity grouting 7 is omitted, the nonwoven fabric 9 is attached to both end portions of the conduit 1 including the joint, and the thickness of the steel wire is relatively thin in the part where the step and the gap of the joint are present. It consists of one to three ply, and is installed primarily the stainless steel wire mesh 11 for the stepped and uneven parts that can be easily installed in the shape of the bent portion. A stainless steel wire mesh 11 'is installed on both ends of the joint of the pipeline 1 so that a part of the end of the stepped and unrolled stainless steel wire 11 is pressed and overlapped. The stainless steel wire mesh 11 'is composed of one layer of relatively thick steel wire, but is planned to be slightly wider than the width of the nonwoven fabric 9 so that the stainless steel wire mesh 11' for both ends of the joint is formed. It is installed so that the upper part overlaps about 10 centimeters in a cylindrical state, and the cylindrical water-expanded rubber band 15 is wrapped around the edges of both ends of the stainless wire mesh 11 'outer surface, and in the case of site construction Overlapping stainless steel at the top using a plier, a tool normally used to open the wire mesh 11 'to elastically adhere the inner wall of the conduit 1 The transverse iron wires abutting on the wire mesh 11 'are fixed to each other, and the wires 11 and 11' are fixed to each other by fixing wires 17, and the stainless steel wire meshes 11 and 11 'have a predetermined thickness from the inner wall of the pipeline 1. After spun or apply fiber reinforced special cement mortar or epoxy (19) to the extent that it is covered, the surface is cleaned, and then spun or apply fiber reinforced epoxy or resin (21) to finish the surface and harden it for a predetermined time. .

Here, since the step and gap between the top, bottom, left and right are not constant in the step part of the joint part of the conventional pipe part 1, since the eccentricity is often acted by one stainless wire mesh integrated, the pipe part of the pipe part 1 Separate stainless wire meshes (11, 11 ') were applied between both ends and joints to overcome these eccentric effects, and the stainless wire mesh (11') was removed from the inner wall of the pipeline (1). In order to position them evenly at several millimeters apart, U-shaped grooves 13 of several millimeters deep are formed inside the centimeters from both ends of the stainless wire mesh 11 ', and then on the inner wall of the pipeline 1 When installed, the stainless steel wire meshes 11 and 11 'are installed on the tension side of the repairing material a few millimeters away from the inner wall of the pipe 1, so that the case of reinforced concrete If its own to form a U-shaped groove (13) not only have the function of reinforcement is also have a function for reinforcing the rigidity of the stainless steel wire mesh (11 ').

The above method was mainly described in the case of partial repair for abnormal parts of the pipe line (1), but in the case of the overall repair including the middle part of the pipe line, if the extension is carried out in the same way, the whole repair method construction is performed. do.

The present invention is for the large diameter pipelines with large diameter of the pipeline (1), when the worker enters the repair site directly in the pipeline, the fiber reinforcement special cement is used not only for the partial repair of the pipe joint but also for the whole repair including the middle of the pipeline. Mortar or epoxy is used, and stainless steel wire mesh is added to reinforce the strength of the repairing material, and the cylindrical water-expanded rubber band is wound around the edges of both ends of the stainless steel wire mesh to improve the exponential properties. The surface finish with resin is expected to reduce the wear caused by the continuous flow of sewage, thereby improving the durability.

Claims (1)

In the case of the whole repair including joint part repair and middle part of large diameter pipeline, non-woven fabric attached to the inner part of both ends including the joint part of the pipe, especially when repairing the stepped part of the joint, divided into the joint part of the pipe and part of both ends However, stainless steel wire meshes are integrally installed, cylindrical water-expandable rubber bands are wound around both edges of the outer surface of the stainless steel wire mesh, and fibers are poured so that the stainless steel wire mesh is covered by a predetermined thickness from the inner wall of the pipeline. Stainless steel wire mesh and stainless steel wire made of reinforcement special cement mortar or epoxy, and fiber reinforced epoxy or resin applied for surface finishing. Stainless steel U-shaped groove formed on the mesh Large-diameter inner pipe trenchless repair method, characterized in that with a separation material Greater rigidity reinforcement function of the wire mesh.