LU87239A1 - Sewer-pipe repair method - uses synthetic resin tube reinforced by honeycomb support - Google Patents

Abstract

The method repairs a defective sewer-pipe, imparting chemical and mechanical strength in addition to rendering it watertight. A reinforced synthetic resin tube (3) enclosed in a watertight flexible one (1) is installed over the entire internal pipe surface. The resin tube is reinforced by a honeycomb-section support (2). Its cells can be open (2'), closed (2"), or alternately open and closed.

Description

DESCRIPTIVE MEMORY FILED IN SUPPORT OF A PATENT INVENTION APPLICATION IN THE GRAND DUCHY OF LUXEMBOURG

Ardel International S.A.

Forum Royal, 16 rue des Bains Boulevard Royal-Avenue de la Porte Neuve Luxembourg

Process for making a degraded sewer pipe located below the level of the water table waterproof and mechanically and chemically resistant.

The present invention relates to sewer pipes and more generally existing network pipes requiring the rehabilitation of their mechanical performance to crushing, breakage and sealing and being below the level of the water table with, as result, groundwater penetration inside the pipeline.

According to a patent application jointly filed by the holder, a process for making a degraded and mechanically ^ tight and chemically resistant sewer pipe consists in applying a synthetic resin pipe to the entire internal surface of the pipe to be treated reinforced and lined with a tube made of waterproof flexible material, the frame of the synthetic resin pipe consists of a honeycomb support.

The result of this process has proven to be satisfactory, but it seemed advantageous according to the present invention to provide this process with an improvement, in particular in the case of pipes degraded to the point of giving rise to large leaks of penetrating water. .

According to the invention, the improved method is characterized in that the assembly, a flexible and sealed flexible tube, made of synthetic resin with its honeycomb support, is covered with an envelope of synthetic material of thin heat-shrinkable thickness and perforated with a multitude of holes.

Still according to the invention, the section of the holes is triangular and the vertices of the triangles form tear points.

To illustrate the invention, the attached schematic drawing shows, by way of example only, in:

Figure 1 half a portion of synthetic resin pipe with flexible flexible tube, honeycomb support and envelope of synthetic material, before implementation, and

Figure 2 a plan view of a portion of heat shrinkable and perforated synthetic envelope.

We see in Figure 1 the flexible watertight tube 1, the synthetic resin pipe 2 with so.n frame 3, consisting of a honeycomb support- with open cells, and the heat-shrinkable synthetic envelope 4. -

In Figure 2 we see the synthetic casing 4 provided with a series of holes 5 of. triangular section with breaking points 6.

After implementation and during the hot polymerization of the synthetic resin, the synthetic shrink wrap will tear - which is facilitated by the initiation of ruptures - and destroy itself. The synthetic resin is released without ever having been in contact with water, clings to the internal wall of the pipe and infiltrates into the cracks by keeping the structure under pressure during the hot polymerization.

Claims (2)

1. Method for rendering a degraded sewer pipe waterproof and mechanically and chemically resistant, consisting in the application over the entire internal surface of the pipe to be treated of a pipe (3) made of reinforced synthetic resin and lined with a tube made of waterproof flexible material · (1), the reinforcement of said synthetic resin pipe (2) being constituted by a honeycomb support (3), characterized in that the assembly, waterproof flexible tube (1) and synthetic resin pipe (2) with its alveolar support (3), is covered with an envelope (4) of thin synthetic material, heat shrinkable and perforated with a multitude of holes (5). 2. Method according to claim 1, character ized in that the holes (5) have a triangular section and the vertices of the triangles form incipient fractures (6).