DE10315560B3 - Stabilising waste water pipework, comprises cutting a reversibly formed pipe axially, rolling it up and placing it in the pipe, unrolling it and sealing it at its edges - Google Patents

Abstract

A process for stabilising a waste water shaft (10) in the ground, which has a cylindrical section (12) with an inner diameter D at its lower end, and an opening with a diameter d at its upper end, comprises cutting a reversibly deformable pipe with a diameter between d and D in the axial direction, so at least two cut edges are formed. The cut open pipe is then rolled up to reduce the original diameter, so its outer diameter is 5d. The rolled up pipe (20) is then placed in the shaft via the opening (16) and unrolled. The unrolled pipe is then connected at its cut edges and the base (18), so it is water tight. The rolled up pipe is formed from a right angular section. The pipe is glass fibre reinforced and at least one layer consists of a glass fibre reinforced synthetic resin.

Description

The invention relates to a method for the remediation of a sewage shaft placed in a floor (in the ground). An exemplary construction of a known sewage shaft is in 1 shown. The sewage shaft 10 includes a lower, cylindrical section 12 (with three superimposed segments 12a . b and c ) and an upper, tapered section 14 with an upper opening (inlet and inspection opening) 16 , A floor area (a sole) of the shaft 10 with channel has the reference symbol 18 ,

To a sewer system, including associated shafts high demands made. At the same time, the parts are subject extreme stress, especially extreme corrosive Attack. Pumping Stations are also subject to considerable mechanical stress, for example due to loads the one above out Roadway.

A significant proportion of the example Wastewater manholes in operation in Europe are defective. The shafts are destroyed so far especially corroded and broken that the wastewater only partially deliberately removed becomes.

The renovation of a sewage shaft requires a big one Expenditure. The floor area around the sewage shaft must be excavated over a large area, to get access to the sewage shaft. The repair work last days. The impact on the infrastructure is correspondingly high.

The invention is intended to be a simplified renovation opportunity for one Wastewater shaft can be specified without sacrificing the necessary security to have to. A main task is to make the remedial measure faster carry out to be able to and thus achieve a lower traffic load. simultaneously the costs should also be reduced.

The invention proceeds from the following Basic ideas from: With the previous renovation concepts, the existing (old) shaft completely demolished. This requires appropriate Civil engineering projects. In principle you can however the existing shafts remain in the ground. You just have to be renewed on the inside. activities for coating the inner walls of shafts are however complex. Moreover is access via the mostly tapered opening area difficult in the lid. For this reason, a so-called "relining", as is the case with the Example with sewers is known. There is a new one in a worn sewage pipe Sewage pipe (with a correspondingly smaller diameter) simply pulled in.

In order to be able to use this refurbishment option, which is almost optimal from a technical point of view, also for sewage shafts, the invention makes use of the following consideration:
The "replacement pipe" which is to be assembled in the defective sewage shaft must have an outer diameter which corresponds at most to the inner diameter of the existing shaft section. The diameter of this "relining pipe" will usually be smaller than the inner diameter of the shaft section to be lined. However, it will again be larger than the inside diameter of the opening of the sewage shaft. In order to be able to pass such a pipe through the opening of the sewage shaft, the invention provides the following features:
A pipe is used, the dimensions of which essentially correspond to the dimensions of the replacement pipe to be formed in the sewage shaft. This tube is cut open in the axial direction and rolled up. Rolled up should be understood to mean that the outside diameter of the pipe tapers until the rolled pipe can be passed through the opening of the sewage shaft. If it is through the opening, it can be relaxed again. The interface is then closed again. The pipe has then more or less returned to its original shape and size.

It is easy to see that not every pipe can be used for this. Rather, only such pipes are used that have a suitable ductility exhibit. In particular, the deformability should be reversible, so that the tube after winding up more or less automatically again unrolled.

The method according to the invention has the decisive one The advantage that almost no civil engineering work is necessary. The The cover of the sewage shaft is removed, the lining pipe introduced and connected in an appropriate manner, as below is still described.

• – ein reversibel verformbares Rohr mit einem Durchmesser ≥ d und ≤ D wird in Axialrichtung so aufgeschnitten, dass mindestens zwei, axial verlaufende Schnittkanten gebildet werden,
• – das aufgeschnittene Rohr wird unter Verringerung seines ursprünglichen Durchmessers so aufgerollt, dass sein Außendurchmesser ≤ d beträgt,
• – das aufgerollte Rohr wird anschließend durch die Öffnung des Abwasserschachtes in den Abwasserschacht transportiert und wieder entrollt,
• – das entrollte Rohr wird im Bereich seiner Schnittkanten sowie an seinem unteren Ende mit der Sohle wasserdicht verbunden.

According to this, the invention in its most general embodiment relates to a method for the remediation of a sewage shaft placed in a floor with a cylindrical section of an inner diameter D at least at the lower end adjacent to a base and with an opening of a diameter d at the upper end, with the following steps:

• A reversibly deformable tube with a diameter ≥ d and ≤ D is cut open in the axial direction in such a way that at least two axially extending cutting edges are formed,
• The cut tube is rolled up, reducing its original diameter, so that its outside diameter is ≤ d,
• - The rolled pipe is then through the opening of the sewage shaft in the Ab water shaft transported and unrolled again,
• - The unrolled pipe is connected in a watertight manner in the area of its cut edges and at its lower end to the sole.

Usually, the upper section of the sewage shaft provided with the opening will be designed in the manner of a dome, as in 1 shown.

It is basically possible to use the procedure described so that the pipe is cut open several times and the Individual parts through the opening guided , if necessary after prior upsetting. A disadvantage here is that afterwards Several interfaces have to be reconnected, reducing the risk of Leaks increase.

An alternative to using a Pipe, which is cut open and rolled up, represents the use a rectangular plate, which is rolled up and through the opening of the Wastewater shaft is introduced. The further process steps are then identical to the procedure in which a cut Pipe is used to line the sewage shaft.

In this respect, the following information applies especially regarding the material selection and material properties of the pipe a corresponding plate.

For example, a plastic pipe can be used in which the plastic is reinforced with glass fibers. The plastic tube can be multi-layered, with at least one Layer can consist of a glass fiber reinforced synthetic resin. This Synthetic resin can be a polyester resin, but also a vinyl ester resin his. Such resins for the production of plastic pipes are known.

For the use of the invention Resins in combination with, for example, are particularly suitable Glass fibers in the hardened State a modulus of elasticity of, for example,> 1,500 MPa,> 2,500 MPa and in particular> 3,000 MPa.

The concrete choice of materials as well the material thickness, if necessary, the formation of individual layers of the pipe wall is selected so that the tube can be deformed so that it fits through the opening. The original Diameter usually around 30-80 reduced (according to the shaft opening).

The tube / plate can have a wall thickness of 2-10 mm, for example 5-7 mm. It can be an exterior and have inner layer of pure resin (each with <1 mm wall thickness, also <0.5 mm wall thickness) and at least one with fibers, such as glass fibers, and / or fillers such as quartz sand or calcium carbonate mixed resin intermediate layer.

The unrolled pipe can then in Area of corresponding edges (cut edges) are glued. It is also possible to laminate the edges. Corresponding connections can also in the transition area to the sole in order to maintain waterproof connections and an uncontrolled outflow to prevent waste water.

Before the described "relining" of the sewage shaft can, if necessary, also the sole (the bottom) of the Sewage shaft to be renovated. In the floor area there is in particular a So-called channel formed, which the supply and discharge of Sewage over Corresponding sewer lines are used.

For the renovation of the floor area the old sole can be broken out and removed. Possibly but a new sole area is only launched. It depends whether / which connection lines are available.

The invention provides, first of all annular Cut open frames with an outer diameter ≤ D and ≥ d, to fold and through the opening to introduce into the sewage shaft, then unfold the frame to an endless frame again connect and place horizontally in the sole area. "Wrinkles" is representative for every Kind of cross-sectional reduction of the frame. It is also possible to Roll up the frame as described above using the tube.

Then a multi-part The base plate should be laid on the frame so that cutouts remain. A channel is then inserted into these cutouts, which through the shaft opening tracked becomes. The channel should be laid so that there is a Largely flat upper sole surface together with the adjacent sections of the soleplate and Framework results.

These parts (frame, soleplate and Channels) are then connected to each other in a watertight manner and later to the tracked relining pipe connected.

The channel can be removed during assembly hung in the cutouts become. Later For example, the channel is glued to the base plate.

The frame can be a so-called angular frame be the first leg running parallel to the sole and one from the outer edge of the first leg in the direction of the shaft opening protruding second Leg. Such a frame can be the soleplate or sections of the Take up the soleplate well because of the horizontal leg as a support surface is being used.

In general, the invention includes Use of a pipe cut open in the axial direction for renovation a sewage shaft, the renovation for example after the procedure described is carried out.

The above features of the invention can be modified in many ways without the leave the general idea of the invention. So it is possible to use a pipe which, after laying in the sewage shaft, is at a distance from the inner wall of the old shaft. Such an annular space can then be backfilled. However, it is also possible to choose a pipe with an outside diameter that actually corresponds to the inside diameter of the old sewage shaft, so that after the refurbishment the two lie more or less flat on each other.

Although polyester tubes with at least one Reinforcement layer (reinforcement: especially glass fibers) special Can also have advantages Pipes made of other materials are used, provided they are required flexibility (Deformability). For example, metal pipes are also conceivable or pipes made of composite materials.

The lining of the sewage shaft with a plastic inner skin (formed by the tube respectively the plate) can over itself the entire height of the sewage shaft or above extend a part. It can several corresponding lining parts can also be arranged one above the other.

Regarding the formation of the sole can also prepared soles can be cut open (to pass them through the shaft opening introduce to can). These parts are then connected on the bottom side, for example glued or laminated.

Further features of the invention result from the features of the subclaims as well as the other registration documents.

The invention is illustrated below additional graphic representations explained.

2 shows the top view of a glass fiber reinforced polyester tube manufactured in a centrifugal process with an outer diameter of 0.9 D, where D is the inner diameter of the cylindrical section 12 of the shaft 10 is.

The inside diameter of the shaft opening 16 is indicated by d.

This in 2 tube shown is now cut in the axial direction and, as in 3 shown, rolled up until the outer diameter is 0.9 d, so that the rolled pipe 20 through the opening 16 in the shaft 10 can be introduced. The wound pipe can be used for better handling 20 be held with a strap or the like.

The pipe 20 can be on the bottom (in the area of the sole 18 ) are set up and unrolled again. In the 3 Cut edges to be recognized are then glued together. The result is the cylindrical section 12 of the sewage shaft 10 with a kind of "inner skin" 20 provided, namely the described polyester tube.

In the manner described above, in particular before the relining tube is introduced 20 also the sole area 18 to be renewed.

Claims (16)

Procedure for remediation of a placed in a floor Sewage shaft with a cylindrical section of an inner diameter D at least at the lower end adjacent to a sole and with an opening Diameter d at the top, with the following steps: 1.1 a reversibly deformable pipe with a diameter ≥ d and ≤ D is used in Cut open the axial direction so that at least two axially running Cut edges are formed, 1.2 the cut tube is rolled up, reducing its original diameter, that its outside diameter Is 5d, 1.3 the rolled tube is then through the opening of the Wastewater shaft transported into the wastewater shaft and again unrolled, 1.4 the unrolled pipe is in the area of its cut edges as well as waterproof connected to the sole at its lower end. The method of claim 1, wherein the rolled up Pipe is formed from a rectangular plate. The method of claim 1 using a glass fiber reinforced Plastic pipe. The method of claim 1 using a multilayer plastic pipe, in which at least one layer consists of at least one glass fiber reinforced synthetic resin. The method of claim 1, wherein the unrolled Tube is glued in the area of corresponding edges. The method of claim 1, wherein the corresponding Edges of the tube formed after unrolling are laminated. The method of claim 1, wherein the unrolled Tube is glued to the sole. The method of claim 1, wherein the unrolled Tube is laminated to the sole. The method of claim 1 using a Rohres, which is so deformable that its original Can reduce diameter when rolling up to 20-70%. The method of claim 1 using formation of a tube formed from a polyester resin with a modulus of elasticity in the hardened state> 1,500 MPa, in particular> 3000 MPa. The method of claim 1, wherein before the tube introduced into the sewage shaft the bottom of the sewage shaft is being renovated. A method according to claim 11 with the following steps, if necessary after breaking out and removing the old sole: 12.1 an annular Frames with an outer diameter ≤ D and ≥ d are cut open, folded and through the opening introduced into the sewer shaft, unfolded and placed horizontally in the sole area, 12.2 then a multi-part sole plate laid on the frame so that cutouts remain, 12.3 a channel is tracked through the opening and in the area of the cutouts so that there is largely a flat upper sole surface reveals 12.4 adjacent sections of frame, sole plate and channels are then connected watertight. The method of claim 12 using a Curd which is hung in the cutouts. The method of claim 12 using a Frame with a first leg running parallel to the sole and one from the outer edge of the first leg in the direction of the opening of the sewage shaft protruding second leg. Use one cut open in the axial direction Pipe for the renovation of a sewage shaft. Use according to claim 15 with the proviso that the renovation with a method according to at least one of claims 1 to 14 performed becomes.