DE3501620A1 - Method for laying thermoplastic pipes - Google Patents

Abstract

The invention relates to a method for laying thermoplastic pipes by the relining method, the plastic pipe being pushed through an opening into a pipeline to be sealed. In order to provide a method by which thermoplastic pipes, in particular thin-walled thermoplastic pipes, can be introduced into the pipeline by the relining method even with a small bending radius, i.e. using small foundation-pit openings, it is proposed that the plastic pipe be flattened, bent and rounded again before being inserted into the line.

Description

The invention relates to a method for laying

thermoplastic pipes in the relining process, whereby the Plastic pipe pushed into a pipe to be sealed through an opening will.

When renovating leaky gas, water and sewer pipes increasingly thermoplastic plastic pipes in the so-called relining process used.

To the inside width of the pipeline to be rehabilitated, if possible To keep them large, tubes that are very thin-walled are used. The disadvantage it is here that these thin-walled tubes only with very large bending radii in Let the pipeline to be rehabilitated, i.e. to be sealed, be pulled in. With deep-seated Long construction pits are therefore required for the installation of the plastic pipes. If the bending radius is too tight, the plastic pipe flattens out in the bent area or buckles or even kinks and thus damage occurs, dib a make further use impossible.

The object of the invention is therefore to create a method with the thermoplastic plastic pipes, especially thin-walled thermoplastic Plastic pipes in the relining process also with a tight bending radius, i.e.

using small excavation openings in the pipeline can be.

This object is achieved according to the invention in that the plastic pipes be flattened, bent and rounded again before insertion into the line.

The solution according to the invention uses the flexibility of the pipe wall, the deformation possibly still by a Warming assisted can be. By continuously pulling in or pushing the pipe in a Device bent flattened and rounded again after passing the bend. This method makes it possible to use the existing manholes in sewers, i.e. there is no need for civil engineering work to produce long construction pits to be carried out as they are otherwise necessary for the introduction of the thin-walled pipes, to maintain large bending radii. In the method according to the invention After the pipe has been flattened, it is bent and can then be pushed into the excavation or the manhole to be introduced shortly before the introduction into the pipe again to be rounded. Because, as mentioned at the beginning, this is the flexibility of the pipe wall is exploited or the pipe wall is heated before the flattening occurs no damage, as would otherwise occur when the bending radius is exceeded, i.e. too narrow a radius would be expected.

It has been shown that the method according to the invention thereby only small construction pits are necessary or the sewer shafts can be used, also a rehabilitation of gas, water and sewer lines in streets and crossings with high traffic.

Claims (2)

Method for laying thermoplastic plastic pipes Patent claims 1. Process for laying thermoplastic plastic pipes using the relining process, wherein the plastic pipe is pushed into a pipeline to be sealed through an opening is, characterized in that the plastic pipe prior to insertion into the line is flattened, bent and rounded again. 2. The method according to claim 1, characterized in that the plastic pipe immediately before flattening and qqf. the rounding is heated.