WO2003038330A1

WO2003038330A1 - Method for filling open cavities and for securing cables, empty pipes or similar lines in the bottom area of waste water pipes by using a filling compound

Info

Publication number: WO2003038330A1
Application number: PCT/DE2002/004001
Authority: WO
Inventors: Michael Henze
Original assignee: Michael Henze
Priority date: 2001-10-30
Filing date: 2002-10-24
Publication date: 2003-05-08
Also published as: DE10295022D2

Abstract

The invention relates to a method for filling cavities and gaps and for securing lines in the bottom area of inaccessible waste water pipes by using a liquid filling compound (13), which is introduced into the pipe (1), between the contour of the periphery of the remaining free pipe inner cross-section and the outer radially expandable lateral surface of a swelling body (12), which is pressurized with an internal pressure and which is pressed against the contour of the periphery of the remaining pipe inner cross-section until the filling compound (13) is hardened. The inventive method is characterized in that, during an inversion procedure, an expandable tube (12) is turned inside out into the wastewater channel pipe (1) whereby pushing the filling compound (13) in front of the turned fold (10) in the bottom area (5) of the wastewater channel pipe (1) while displacing it against the pipe gradient serving as a free surface so that the filling compound (13) covers the lines (4) and completely fills the cavities and gaps until the lines (4) are covered, while being pressed, by the turned outer side of the tube lateral surface (12). After the filling compound (13) hardens, the tube (12) is either removed from the channel (1) or is hardened itself while remaining as an additional lining inside the channel (1).

Description

Process for filling open cavities and for fastening cables, empty pipes or other lines in the bottom area of sewage pipes by means of a filling compound

The invention describes a method for the continuous filling of open cavities and spaces and for the attachment of cables, empty pipes or other additional lines or devices in the sole area along the inner wall of non-accessible sewer pipes, and also in those in which linings and coatings on the Inner wall run or are attached to it or are only attached by the method, by means of a liquid filler added in the tube and hardening after a certain time, which has adhesive properties, between the contour of the circumference of the remaining free inner tube cross section and the outer radially expandable Jacket of a swelling body which is under internal pressure and expands in the pipe and which presses down on the contour of the circumference of the remaining free pipe inner cross section at least until the filling compound has hardened.

Underground cables and telecommunication lines with copper wires have been known since the invention of electricity and the telephone. In the meantime, this technology has undergone a revolutionary development. Especially since the computer technology accessible to everyone and the current establishment of a global communication network, there has been an enormous need for transmission and transmission capacities that the market is currently unable to meet. This is supported by the considerable efforts to liberalize the telecommunications market and the associated privatizations state monopolistic telephone companies. The resulting international competition has created a booming market that is urgently looking for new and additional data paths.

The underground cable fixed network is and remains the backbone of the data supply, especially since the technology has not stopped in this area, and today, through fiber optic technology, also called fiber optic technology, the safest way to transmit larger outputs with the best quality can. For this reason in particular, the market is concentrating particularly on this area and modernizing and expanding the worldwide fixed cable network in town and country with enormous investments. The laying work required in this context is usually still carried out in the conventional open trench construction method and, due to the increasingly ruthless competitive behavior of the companies, must be carried out faster and cheaper. There is therefore an intensive search for new cable laying methods that are more economical to use, avoid chaotic construction site operations, as has been the case up to now, especially in cities, and also take into account people's increased environmental awareness. Therefore, more and more people are turning to trenchless construction methods, which are also called NODIG processes.

For this reason, this very innovative technology has developed well in recent years and has meanwhile produced a wide variety of processes and techniques.

With one of the most economical and fastest implementable concepts for a cable laying, the use of existing ways is in or out

Disposal pipes, especially in sewers.

The best known at the moment are the cable laying methods by means of robots which can be moved remotely in the sewer pipe and which, by means of hook and dowel technology or by means of tensioning rings and plug-in clamps attached to them, fasten suitable cables directly to the inner wall of the sewer.

The disadvantage of this method is that this type of installation can only be used in ducts that are structurally intact for a long time, since many of the known ones Sewer test, repair and refurbishment procedures can no longer be used in the presence of such a cable laying or the cable system must then be removed from the sewer beforehand. Furthermore, due to their filigree and bulky construction, such installations represent an obstacle to the wastewater and the solids disposed of in it, which considerably increases the possibility of sewer blockage. This is also the reason why such installations will always be found at the apex of sewer pipes, where only in the event of special bad weather events does the receiving water exceed the sewer capacity and the cable system is flushed with waste water. Added to this is the fact that not all sewer cleaning methods can be used, for example those which, with tools rotating, usually mechanically machine the entire circumference of the pipe with the help of high-pressure water flushing.

The existing and later added house connection lines also represent a major problem. These can flow into the sewer practically along the entire pipe route, from shaft to shaft, at any position in the upper half of the pipe, from 9 a.m. to 3 p.m. of the circumference, or later on from the outside , often uncontrollable, struck. These inlet connections have to be circumvented at certain intervals with the cable system to be installed, for which a very conscientious, precise and therefore complex previous project planning and subsequent documentation is required. Even during the later cable operation, the cable routes must be traversed at regular and relatively short intervals with a channel camera and checked for their proper condition. Any indicative defects in the installation must be identified and remedied at an early stage in order to prevent possible malfunctions.

The aforementioned restrictions and the continuing need to use the entire sewer network for cable laying at all times has led to

Using the hose method.

This process with its variants has been used in the sewer for years for a variety of purposes in the area of sewer maintenance and -

Renovation used.

On the one hand, this can be done with a long-distance lining process, a So-called hose relining processes are carried out by pulling or turning an at least radially stretchable rehabilitation hose into the sewer pipe from shaft to shaft over the entire length of a sewer system, expanding it with water, steam or air and pressing it against the inner wall of the duct as far as possible and then due to its composition of materials usually with the support of additional energy sources, such as heat or UV radiation, is cured to form a statically stable inner lining. The jacket of the renovation hoses usually consists of an impregnable, textile carrier material made of felt and / or glass fiber, which is covered at least on one side with a gas- and liquid-dic membrane or can also be firmly connected to it ^' . The carrier material of the hoses is fully impregnated with a liquid synthetic resin that has a correspondingly long pot life until it hardens or hardens, at the latest before it is introduced into the sewer pipe to be renovated, at the factory or on the construction site, at the latest after the impregnation process, a membrane, usually in the form of a clear plastic film, should at least encase the carrier material from the outside, so that no resin can escape from the hose into the environment. If the hose is pulled into the sewer due to the process, it must also be equipped with a continuous hose membrane on the inside, so that the impregnated carrier material remains gas and liquid-tight from the outside and inside against negative external and internal influences and the expansion process with the internal one Membrane is made possible. Or the hose is inverted into the pipe to be rehabilitated under simultaneous internal pressure, whereby the outer hose jacket side with the membrane becomes the inside of the hose and the inner wet, resin-soaked side of the hose jacket in the sewer pipe becomes the outside of the hose as a result of the slip process and at the same time due to. Internal pressure in the hose on the duct wall comes into contact.

There are two installation options for the latter method. One variant provides for the resin-impregnated carrier material to be pressed wet directly against the ⁽ anal wall) to be renovated and thus to be additionally glued to the sewer structure. The second variant provides for an additional one in the sewer insert the tubular, gas- and liquid-tight membrane, also called "preliner", lengthwise and only then insert the actual renovation hose into it and thus into the sewer. Here, on the other hand, the soaked carrier material comes to lie directly on the inside of the preliner and Both of these are pressed by the internal pressure in the inner tube membrane from this onto the channel wall.This variant is intended to deliberately prevent the impregnated carrier material from being associated with the most restrictive channel conditions, such as moisture and dirt, but in a predetermined material - To enclose and soak quality between two membrane films and at least to secure until after it has hardened.

These aforementioned hose methods for sewer rehabilitation are now also being used in practice for additional cables and / or empty pipe laying, but only make sense in sewer sections in need of refurbishment, where the aforementioned robotic laying techniques cannot be used precisely because of the acute or later need for refurbishment. This form of cable laying is therefore subject to a restriction that it always involves a complete renovation, ie a complete renewal of the sewer pipe, and therefore use in intact ducts is not recommended due to the hose material, which is relatively expensive for this purpose. According to the prior art, cables or corresponding installation pipes, for example, are added to the outside of the rehabilitation hoses on the construction site and pressed by them during the hose installation onto the inner wall of the sewer and, after the hose sheath has hardened, are more or less positively fixed between the hose and the sewer wall. Depending on the hose method and additional aids, the cables or installation pipes can be laid on site before the renovation hose is inserted in the base area of the sewer or previously fixed in the apex area. However, they can also be inserted into the channel at the same time as the hose and attached by the channel itself. Corresponding publications, such as DE 198 11 955, DE 197 01 787 and DE 198 25 325, describe possible design variants for this in detail. The disadvantage of this method is that, for the sake of simplicity, you only install the pure cable or empty pipes with a renovation hose or you cover a cable / empty pipe section already laid in the duct with the same, which remains the same, behind the renovation hose between the outside The hose jacket and the inner wall of the sewer create cavities and gaps that are not desirable in the sewer rehabilitation industry due to the implementation regulations. A good representation of this situation is shown in the drawings for the utility model DE 298 11 512 and the patent US 5,305,798. These voids and gaps support the migration of the hose lining with penetrating groundwater from the outside and corresponding root ingrowth. Subsequent spraying or foaming of the cavities from the sewer shafts is practically impossible due to the large lengths of 50 m on average. The technical regulations and standards state that the hose material must be pressed against the duct wall. The above parts, which may also include such a cable / conduit installation, had to be milled flush with the duct wall using complex, remote-controlled robot processes prior to hose renovation and existing cable systems would therefore have to be dismantled before such renovation. Furthermore, the static strength of the entire renovation hose after it has hardened is greatly limited by the indentation in these areas, which in turn would require a lot of effort from the factory to reinforce the hose material in these areas.

If an inversion hose with preliner is used for renovation and cable / conduit laying and the cable / conduit section is between preliner and duct wall, the aforementioned problems remain. If there is a cable / empty pipe section between the preliner and the renovation hose, the static problem remains at least until the preliner becomes defective at some point, at the latest due to aging, and any water and roots that may be present can penetrate the existing cavity and space.

This has led to the development of special, compact empty tube modules, which usually provide several empty tubes side by side as a flat package and have a flat, lenticular overall cross-section and thus better adapt to the inner channel geometry and thereby leave virtually no remaining voids between the hose and channel wall. The disadvantage is that these modules are very expensive to manufacture at the customer's special request and often have to be additionally impregnated separately on the construction site in a specially specified watering system before they can be fed into the hose process. See also the technical descriptions and drawings in the utility model applications DE 299 10 196 and 298 16 103. The handling, in particular of the impregnated modules, is also very great due to their necessary length with regard to the existing construction site area on the shaft in the middle of, for example, a main traffic street in a big city cumbersome and difficult. So soaking these modules on site is very lengthy and comes into conflict with the possible pot life of the resin in weather conditions that are not always foreseeable.

A further hose rehabilitation method for the cable and / or empty pipe laying is known that at least one longitudinally welded and stretchable PE-HD sealing membrane, which is covered on one side with area knobs with round knobs, pulls into the sewer pipe as a hose, seals the hose ends in the shafts and seals pressed against the inside wall of the duct under internal pressure with the knobs and with cables and / or conduits placed lengthways in between. The annular space defined by the knobs between the sealing membrane and the duct wall, in which the cables and / or empty pipes are also laid, is then completely filled with a special filling compound. The internal pressure in the hose is only released when the filling compound has hardened.

Disadvantages of this method are that this method always involves a very complex complete renovation of the entire duct, and the wall cross-section and the wall thickness of the annular space are more or less used or filled, depending on the number and diameter of the cables or conduits. No filler can therefore reach these points, which leads to a very critical restriction of the static strength of the Hose leads. Because a serious static strength check can only be carried out with a hardened round pipe with a uniform wall thickness and material quality, within a certain tolerance range.

Compared to the robot method described at the beginning, however, all cable installation methods together with a renovation hose have the advantage that the installed cable system is protected in or behind the hose jacket of the renovation hose and is protected from the harsh sewer operation and can therefore continue to be carried out as usual, as no bulky, protruding filigree parts into the actual sewer space and means a possible obstacle for the waste water and its contained solids. In addition, with renovation hoses, cable installations can also be carried out advantageously in the bottom of sewer pipes, where no house connections on the route open into the sewer. This also has the advantage that no complex cable laying plans have to be drawn up about the exact position and position of the attached cables, since the position of the sole is always defined by the sewer pipe and can therefore be seen at any time from the conventional floor plans of the sewer inventory documentation.

On the other hand, the hose method can also be used as a pure-bred cable and / or empty pipe installation method and can therefore be used primarily in channels that do not require renovation. The prior art knows both the possibility of doing this with a hose to be drawn in and with a hose to be pushed in. The principle works the same as for hose rehabilitation, except that it is not a rehabilitation hose hardening in the sewer, but a simple assembly hose, i.e. also a flexible, at least radially expandable and liquid and gas-tight hose, e.g. made of a thin plastic or a rubber-like one Material that is pressed against the inside of the duct under internal pressure. The cable / empty pipe package to be installed corresponds, as already described in more detail in the previous paragraph, again to a special, factory-made cable / empty pipe module, which additionally has resin before being inserted into the sewer pipe must be soaked, comes to lie in the channel between the tube and the channel wall and is pressed through the tube to the channel wall and glued by means of the resin. If the module has been glued by curing the resin, this causes the module to separate from the hose due to different material properties, and the hose can be removed from the channel again after the internal pressure has been removed. Such hoses are either disposable and have to be disposed of afterwards, or can be used for other purposes.

In addition to the already known disadvantages of the very complex production and handling of the modules, this variant of the hose method has the advantage over the robot method that installation is also not recommended in ducts in need of acute renovation, but with less stringent conditions also in later rehabilitation ducts can take place, because due to the very flat, smooth and conformable gluing of the module almost all test, shut-off, repair and renovation procedures etc. can be used in the duct, if not exactly in the wall area on which the module is laid, repairs are required. In this version, too, the duct operation can be carried out almost without restriction, since no disruptive parts protrude into the duct. Mechanical cleaning methods are also not recommended here. If a module is not installed in the base, it is also necessary to plan and document the installation route in a similar way as with the robot method.

The invention is based on the object of avoiding the disadvantages of the prior art mentioned above and of providing a technically solid, easy to handle and economically advantageous, i.e. competitive method to specify that at least in the bottom area of a sewer pipe, the subsequent installation of a cable / empty pipe route by filling open cavities and gaps by means of a filler material under conditions acceptable for cable and sewer operation without

a. only largely intact channels or only in need of hose renovation for the installation, b. the installation represents a significant obstacle to the operation of the sewer and its known methods of operation and repair, or may be damaged by the harsh duct conditions or the methods of operation and repair, c. existing or later to be installed side inlets lead to increased effort or can become a danger to the installed cable system, d. Voids and / or gaps remain in the area of the cable route, e. Static restrictions and / or hindrances arise in the area of the cable route when using a renovation hose, f. complex and difficult to handle cable / conduit modules must be used, g. the cable / conduit modules must be soaked before being placed in the duct.

This object is achieved by a method of the type mentioned at the outset, which is characterized in that a stretchable, gas and liquid-tight hose is turned inside out in the sewer pipe by means of internal pressure in a form-fitting and largely wrinkle-free manner and thereby the excess, liquid filling material pushes in front of the pleat in the bottom area of the sewer pipe against the pipe gradient as a free mirror so that the filling material covers the cables, empty pipes or other additional lines or devices running in the sole along the pipe wall and fills the open voids and gaps formed by them until the cables, empty pipes or other additional lines or devices are covered by the turned outside of the hose jacket under compression without air and the hose after the filler has hardened either the channel again is removed, or cures itself and remains in the channel as additional lining. Description of the invention:

The invention describes a method by means of which a cable / conduit module into which cables or other lines, e.g. for telecommunications, can be drawn in or blown in the sole area of a non-accessible sewer pipe attached to the sewer wall by a radially expandable, gas and liquid-tight and flexible hose starting in a shaft connection (starting shaft) under internal pressure in the inverting process continuously at least until is introduced to the next following shaft (target shaft) and thereby pushes a sufficient amount of backfill liquid added in the sewer pipe as a free mirror in front of the evergreen on the bottom of the sewer against the pipe gradient. The filling liquid fills all open cavities and gaps, which are formed by the cable / conduit module and the sewer base opposite the cover by the hose jacket, before the hose jacket has placed and pressed on the contour of the inner wall of the channel under internal pressure.

The filler has adhesive properties that achieve the greatest strength and adhesion with curing. The curing time, i.e. the pot life of the backfill liquid must be adjustable so that curing only begins after the turning process and can advantageously be accelerated by heating as required. Heating the liquid can e.g. by heating the module itself by flowing hot water or hot air through the empty pipes, or by heating the pressure medium of the hose.

The filling liquid itself can preferably be a two-component plastic with a suitable viscosity, for example an epoxy resin, or it can also be other adhesives and filling compounds according to the specific requirements. The cable / empty pipe module consists of one or more commercially available, suitable for this application and depending on the process variant additionally specified cable installation pipes, all of which are preferably arranged parallel to one another and according to certain, usually regular length sections are coupled together at a small distance. The distance enables the individual cable installation pipes of the module to flow around better with the filling liquid. This module is drawn in by the method according to the invention on the base of the channel at least over the entire length of a channel post. At the sewer pipe erides, even before the junction with the sewer shafts, the individual empty pipes of the module are advantageously sunk with a flat transition in previously made slots in the sewer wall of the base and guided in this way into the adjoining shaft area. The ^' slots with the inserted empty pipes are then closed flush with the inside wall of the duct using a suitable mortar. This laying of the module in the sole wall is also recommended throughout the entire shaft area, in order to achieve a professional, ie solid and unobstructed laying for the sewer operation, since the method according to the invention cannot always be used in this area. Depending on requirements, the empty pipes are guided in this way into the following section or through the shaft banquet (lateral treads) to the shaft wall and on or in slots in this up to a possible distributor / branch or connection device.

The inverting process is now prepared by inserting the inversion tube with its inverted pleat in the starting shaft into the starting area of the sewer pipe and pressing it against the inside wall of the sewer pipe, thereby sealing the interior of the sewer pipe, at least in the sole area, against the starting shaft. Since all sewers are laid on a slope, the slip process is always carried out against the slope, so that the starting shaft is always at a low level in relation to the target shaft. Before the actual advancing inverting process begins, a sufficient amount of liquid filling material is placed behind the inverting pleat from the starting shaft via a filler pipe with funnel, which was previously inserted into the pipe connection of the starting shaft together with the ready-to-fit hose and temporarily clamped there with the hose Hose on the sole of the free Channel space filled. Since the sewer slope increases in the direction of the sink, the filling liquid will not be able to flow off in the direction of the target shaft, but will always be available with the highest liquid level as a free level in front of the sink gap.

When filling is complete, the filler pipe with funnel between the hose and the sewer pipe can be pulled out and completely removed from the shaft. The amount of filler liquid entered should be such that the liquid level in the stowage area of the slip gaps always covers the cable / empty tube module during the entire slip process, so that the contour of the inner surface of the channel in the sole area is always below the highest liquid level of the filler material. This ensures that all parts of the cable system that protrude into the duct and the resulting voids and gaps flow around the filling liquid, are filled up without air pockets and are covered high enough.

It is up to the user to choose a procedure that may be different according to his individual needs in practical application. Another option would be to transport the backfill liquid from the target shaft using a pump and a supply hose to the pleat, where, if it is a two-component material, mixing the components first and only in the required amount, controlled and monitored by a TV inspection camera to fill in the sewer. The hose, the mixing device and the camera would then move continuously in the direction of the target shaft at a suitable distance from one another or the latter two would be pulled. A camera observation for checking, controlling and documenting the putting and filling process on site would generally be recommended in order to be able to guarantee and document a correct position of the module and a sufficient and qualitatively perfect filling and thus laying of the module before curing.

The continuous everting process can now begin by the tube laying itself inside the sewer pipe under inverted pressure, always along the pipe expands further and lies with its turned jacket side press on the inside wall of the duct and the protruding parts of the cable / conduit module, where it is positively and / or non-positively covered and fixed, while the pleat pushes the excess filling material through the entire pipe in front of it , The leading filler covers the cables and / or empty pipes laid in the sole, flows around them and fills up any voids and gaps in the sole between the hose and the inner wall of the duct before the duct wall and thus also the sole is covered by the turned hose jacket and remains fixed there under pressure. In the channel bottom, the cable system with the cavities and gaps formed for the channel wall with the hose jacket is still covered under the liquid level of the filler, which ensures that there are no air pockets between the hose jacket and the filling liquid. Only when the inverted pleat has reached the target shaft is the actual inverted process completed, the remaining filling liquid can be removed from the process and disposed of. The turned hose is kept under pressure until at least the filling liquid in the pipe has hardened. Depending on the design variants and further configuration of the inventive idea, which are described in more detail below, the hose is now either removed from the channel again or remains in the same as additional lining.

If a simple liquid and gas-tight, flexible mounting hose, for example made of rubber or plastic, is used as the hose, the method according to the invention can be used as an important variant as a pure cable / empty pipe fastening method, and can therefore be used wherever the duct does not have one has structural defects that require a complete overhaul, for example where hose relining is to be considered. Statistically speaking, this affects approx. 80% of the canal sections, which is the largest and therefore most economically interesting application area and market share. The specification compared to the basic inventive method consists only in the fact that an assembly hose is used which does not harden itself and because of its material properties after contact with the After hardening, the filling compound does not form a connection with it, and even experiences a deliberate separation. The cables / conduit devices pressed through the hose to the duct wall are glued or cast directly to the sole wall by means of the filling and adhesive compound after they have hardened. In this case, the assembly hose is removed from the sewer after the resin has hardened and, depending on the material quality, either disposed of as a disposable hose or reused for the next installation section. It is particularly important in this variant that the channel must first be cleaned thoroughly in the channel bottom with a high-pressure flush. The canal with all its inlets should also be out of operation and should not have any penetrating water from the outside and excessively stagnant water in possible pipe sinks.

It is particularly advantageous in this variant if the cables and / or empty pipes, either each one or more as a parallel, flat package, are covered with a resin-impregnable coating, for example a fleece made of polyester needle felt. To protect this coating from its impregnation against dirt, moisture and wetness in the sewer, the cable and / or empty tube package can additionally be surrounded by a protective cover in the form of a thin, loose film tube which extends from the target shaft from the cable and / or The hose package is continuously pulled down in accordance with the everting process so that it is no longer in the area of the filling compound and thus releases the coating at the corresponding point in the channel for the impregnation when it is reached and flooded by the filling material. The coating thus soaked up during the attachment process with the Verfullmasse and always provides a defined, ^'conformal coating thickness securely around the facilities of the cable system around. This is important in order to shield the cable system from the aggressive duct operating conditions later in any case. The cable system is cast in the filler material without air inclusions and in the sole with the duct wall solidly connected to a unit, in an area of the duct where there are no house inlets or may be retrofitted later. The process, in particular in this variant, is optimized if the filling compound behind the hose is additionally heated during the pressing, which, for example in the case of 2-component epoxy resins, leads to faster curing of the filler and quicker and more economical fastening of the cable / conduit section. Such heating is achieved by laying empty pipes through which a heated medium, for example hot water, steam or warm air, flows during their fastening process.

Compared to the known cable laying methods described, this method certainly brings advantages in terms of easier handling, economy and quality. At the same time, with this variant, the base of the corresponding channel is newly coated using the filler, which is certainly an advantageous additional synergy effect and the structural condition of the channel and its operating conditions, e.g. the hydraulics, by the way improved. This variant can therefore also be used to a certain extent in sewers in need of renovation, as long as no extensive measures in the form of hose reeling are required. Individual defects in the fighter and crown area of the channel can be carried out at any time and also later using the known repair methods, even if the cable system installed using this method is present. Hose relining can also be refurbished at any time later using the cable system installed according to the invention. This procedure can be used by any hose relining user, provided he uses the inversion technique, with the existing rehabilitation facilities.

If a resin-impregnated renovation hose is used, the inversion technique must be used for the inventive method. The advantage is that conventional techniques, tried and tested rehabilitation hoses, so-called inliners, can be used in the usual way of installation for the inventive method and no additional effort has to be made for new developments. This method is preferably only used for the laying of cables and / or empty pipes if there is also a comprehensive need for renovation in the sewer and a hose railing for the renovation of the sewer makes technical and economic sense. Conversely from the perspective of sewer rehabilitation, With this variant, each inline liner installed in the sewer renovation can be equipped with a corresponding number of empty pipes as a precaution in view of a possible later cable laying. This concept makes sense, because due to the enormous synergy effect, the additional costs for the accompanying empty pipe laying compared to the installation costs of the inliner are not significant.

This variant is therefore an ideal addition to the variant with assembly hose and covers the remaining approx. 20% of the channels in need of renovation. The procedure is basically the same as for the variant with the assembly hose, except that it is a rehabilitation hose that is soaked with a synthetic resin before it is inserted into the sewer pipe and cures in the sewer, and remains there as additional lining. During insertion with the slip method, the cable and or empty tube package previously drawn into the duct is surrounded by the filling liquid in the same way as already described for the assembly hose, then covered by the hose jacket and pressed against the duct wall until the inliner has hardened and the internal pressure can be removed again. Sooner or later, the filling liquid with the cable / empty tube module will also harden. Since the filling fluid with the cable system is always trapped between the inliner and the channel wall under pressure, the filling material can theoretically be finally cured at a later point in time. In practice, however, this will hardly be the case, since every inliner hardening is accompanied by exothermic heat development due to the chemical process, and the filler compound is always subjected to additional heating, which accelerates its hardening process. Therefore, additional heating of the empty pipes, as with the variant with assembly hose, is not necessary here. Likewise, an additional covering of the cable / conduit modules with a resin-impregnable layer and a protective film is not absolutely necessary. On the other hand, when using empty pipe modules, it is recommended to apply internal pressure to them during the installation process in order to avoid flattening of the round empty pipe cross-section due to the pressure from the outside by the inliner, depending on the material properties of the empty pipes. The internal pressure in the conduit should at least be that Correspond to the internal pressure in the inliner.

For this variant, the inventive method enables the use of two sub-variants of conventional hose renovation, as already described at the beginning of the prior art, namely the hose installation with or without preliner.

Without a preliner, the turned, wet resin-impregnated outside of the hose jacket connects with the filling liquid and the integrated cable / conduit module during the fitting process and presses and fastens all components together directly on the duct wall, where the hose jacket and the filling liquid harden and all components directly together be additionally firmly glued to the sewer structure. All components connect to the sewer structure to form a unit, whereby the inliner creates a covering adhesive connection with the sewer pipe in the fighter and apex area of the sewer and the inliner with the filler in the sewer base creates a filling adhesive connection with the sewer structure. With this method, the renovation hose is not statically weakened by the integrated cable route in the sole area, but by filling the voids and gaps with e.g. an epoxy resin even to a large extent in this area.

If a preliner previously inserted into the channel is used, it must contain the cable / empty tube module at least before the inventive method is used. The preliner is usually a thin, flexible plastic film tube that is at least the length of the sewer system and the circumference is no smaller than the inliner and no larger than the sewer pipe.

In this case, all process sequences are introduced into the preliner in such a way that the rehabilitation hose is inserted into the preliner, whereby the turned, wet, ie soaked outside of the inliner with the filling liquid previously filled in the preliner and the cable / integrated therein / Empty tube module connects, then all components are pressed against the inside of the preliner, which expands under the pressure, and then all components, including the preliner, are pressed against the channel wall and be positively fixed there, while the inliner and filler harden. This variant is not intended to be glued to the sewer structure. However, there is at least an intimate connection, ie an adhesion of the cable / empty tube module to the inliner and an additional static reinforcement of the inliner in the sole by the filling compound. The inliner and the cable system, together with the filling compound, form an extremely stable unit of their own, with no voids or gaps in the wall cross-section. This unit is a form-fitting fit in the inside cross-section of the duct.

If, on the other hand, a preliner is used that has a perforated material structure, the wet, resin-impregnated jacket side of the renovation hose and the filler material on the preliner will cause excess resin and filler liquid to escape through the perforation and even an additional bonding of all of the aforementioned components to the sewer structure achieved with curing.

With the hose method according to the invention and its variants, compared to the prior art, it is achieved that with a new basic method principle, almost all sewer sections in a sewer system are very solid, uniform, economical and professional according to the known standards in the sole with additional cables, conduits or other Cables can be equipped, whereby conventional installation techniques from sewer renovation can be used without complex technical developments. When using an assembly hose as a pure cable / conduit laying method, the method can be used in intact, but also in occasionally damaged channels, whereby the channel base is also renovated due to the fastening means. When using a renovation hose, with or without a preliner, the sewer is completely renewed on the inside by a very high quality lining.

All variants enable further unrestricted operation of the sewer system, whereby the additionally installed lines are only poured very solidly with the sewer structure and / or the rehabilitation hose with a high-strength filler material that is resistant to aggressive waste water and cleaning methods only in the sewer system and the necessary renovation, repair and supplementary construction measures can be carried out in the usual way at any time in the sewer without the installed cable system being a hindrance. Another important advantage, which is particularly important compared to the robotic process, is that in both variants, whether with assembly or renovation hose, the disadvantage of a hydraulic narrowing of the free duct cross-section caused by the additional installation of the cable system due to a very smooth inner surface, at least in the sole is almost balanced, which creates better flow properties of the inner channel wall for the waste water. In addition, a narrower channel is formed in the bottom, which compensates for or even improves the disadvantage of the flattening of the lower inner pipe cross section caused by the installed cable system, in that even with smaller amounts of wastewater a larger flowing water cross section is achieved with a higher flow rate and thus a higher flow rate and thus a more effective gush of water is generated which can transport the wastewater solids more effectively.

Further details, features and advantages of the invention result from the following description of possible exemplary embodiments with reference to the drawings. The drawing shows:

Figure 1 is a vertical section in the middle of a sewer shaft with two opposite sewer pipe connections of a collecting duct, where in the left connection a completed installation of an empty pipe with a renovation hose can already be seen and in the right sewer position such an installation is being prepared by already laying the empty pipe is and the filling liquid is poured into the sole in front of the evert fold, and

Figure 2 in the same collector, the actual fastening process of the empty pipe, in that the rehabilitation hose slips into the sewage pipe, pushes the filling material on the sole in front of it and at the same time the empty pipe is flooded with the filling material and then pressed with its hose jacket without air inclusion on the channel wall, and

Figure 3 shows the purpose and principle of operation of the counter-gradient in the distribution of the filling material through the hose, and

Figure 4 shows the cross section through a sewer pipe with seven empty conduits installed in the sole by means of a mounting hose, and

5 shows the cross section through a sewer pipe with seven cable gauges installed in the sole by means of a renovation hose, and

6 shows the cross section through a sewer pipe with seven cable gauges installed in the sole by means of a rehabilitation hose and preliner.

To in a sewage system in a certain non-accessible and in need of renovation sewer pipes 1, which is known to be laid in the ground as a gravitational line (free-flowing line) on a slope 2, see Figure 3, and can only be operated via entry shafts 3, which are usually arranged at regular intervals, and necessarily to this purpose temporarily taken out of service, cleaned accordingly and, if necessary, sealed, e.g. only an empty pipe 4 laid in the pipe base 5, for example made of a suitable PE material, to be fastened there according to the inventive method, this will be endless in advance by one Storage drum outside the manhole 3 is drawn into the sewer pipe 1 from it at least _' to the following manhole and is therefore initially unsecured in the pipe and manhole bottom 5 and 7 of the sewer pipe 1.

As shown in FIG. 1, the empty pipe 4 is advantageously sunk into the sewer pipe 1 with a gradual transition into the bottom wall 6 shortly before entering the area of the manhole 3 and is also guided into the shaft bottom 7 in the same way. This is done by inserting into the sole wall 6 a correspondingly wide and deep slot is milled by hand, the empty pipe 4 is inserted and the slot is then filled again, for example, with a suitable mortar and plastered smoothly and flush again with the sole wall 6. In the area of the manholes 3, the empty pipe in the bottom wall 6 is guided up to the shaft wall 8 and then vertically in this up to a possible distributor box or splice box or socket, where it is cut and integrated to fit.

This integrated, invisible laying of empty pipes in the wall has the advantage that the empty pipes in the bottom area of the manholes do not hinder the outflow of sewage, since a fastening according to the method as in the sewer pipe 1 according to the invention is not possible in the manhole area. In addition, the cables or lines later installed in it are largely protected against unauthorized access and possible damage. Furthermore, the empty pipes in the connection area of the pipe base 5 do not adversely affect the geometrically round inner cross section of the sewer profile, which should advantageously be present in order to seal the hose better, at least in this area, against the sewer wall or the sewer pipe 1 against the manhole 3 lying lower on the slope 2 can.

Now the actual fastening process begins, in that a rehabilitation hose 9 is inserted over the manhole 3 in the inversion process against the slope 2, see also FIG. 3, of the sewer pipe 1 only to such an extent that the pleat 10 is just before the empty pipe coming out of the pipe base 5 4 is located. At the same time, a filling pipe 11 is clamped between the rehabilitation hose 9 and the apex of the sewer pipe 1. If sufficient internal pressure has built up in the renovation hose 9 in order to press the hose jacket 12 with the necessary pressure against the wall of the sewer pipe 1 and to fix it there, the filling pipe 11 is thereby held and in the sole is the space of the sewer pipe 1 opposite the manhole 3 shown sealed. This is followed by the filling of the pipe base 5 via the filling pipe 11 with a sufficient amount of filling liquid 13. This filling liquid can be, for example, a 2-component epoxy resin that has very good adhesiveness to a wide variety of materials, even on moist substrates and the curing time can be set accordingly. The liquid level 14 is always at its highest due to the counter gradient 2 on the everguard 10 and must always cover at least the empty pipe 4 during the entire installation process.

When the filling is complete, the filling pipe 11 can be pulled out behind the renovation hose 9 in the direction of the manhole 3 and the turning process of the renovation hose 9 can start in the direction of the next manhole in the sewer pipe 1 according to FIGS. 2 and 3. Here, the renovation hose 9 continuously pushes the filling liquid 13 that has accumulated in front of it against the slope 2 in front of it until the turning pleat 10 has reached the next highest manhole, floods the empty pipe 4 laid in the pipe base 5 and fills all open pipes Voids and gaps formed by the tube sheet 5, the empty tube 4 and the subsequent hose jacket 12 without air. The subsequent hose jacket 12 presses itself under internal pressure and the empty pipe 4, which is cast air-free in the filling liquid 13, against the pipe base 5 until at least the renovation hose 9 completely installed using the inverting method has hardened and remains as an additional lining 15 in the sewer pipe 1 after the internal pressure has been removed and the the hardened hose ends protruding from the manholes 3 were cut off flush with the shaft wall 8. The empty pipe 4 is thus protected on the pipe base 5 between the hose jacket 12 and the sole wall 6 and is fastened in an extremely stable manner and is poured into the filling liquid 13, which has also hardened in the meantime, without any cavities or spaces. Since in this example, according to FIGS. 1 and 2, no preliner 17 was used, the wet, resin-impregnated side of the hose jacket 12 has been connected to the filling liquid 13 and, together with this and the empty pipe, directly to the inner wall of the sewer pipe 1 after curing bonded. The finished installation or fastening of a cable system of seven empty pipes 4, into which corresponding cables or other lines, for example for telecommunications, can later be drawn or blown in, by means of a renovation hose 9, which has become a duct lining 15 after curing the cross section through a sewer pipe 1 in Figure 5. Die Filling liquid 13 has become a hardened cavity and space filling 16, which surrounds the empty pipes 4 without air pockets. The newly formed, somewhat narrower channel 18 and the additional refurbishment and cavity filling of the ailing sole wall 6 can also be seen very beautifully. FIG. 6 shows an alternative to FIG. 5, in that the design variant of a rehabilitation hose 9 with a preliner 17 was selected after the execution. The preliner 17 represents a barrier layer to the sewer structure, so that only a positive connection of the renovation hose 9 with the filling liquid 13 and the empty pipes 4 and no additional non-positive bonding to the sewer structure is possible and intended. In this case, the ailing sole wall 6 is not renovated.

Figure 4 shows seven attached empty pipes 4 in the pipe base 5 of a sewer pipe 1 by means of a re-assembled hose. As already mentioned, this variant of the pure cable / empty pipe fastening is basically used in largely intact duct sections, i.e. where no renovation hose 9 is required, and also renovates the dilapidated pipe base 5 to a certain extent. The poured and compressed filling liquid 13 with the integrated empty pipes 4 is, after hardening, connected to the sewer structure to form a unit, almost seamlessly, as cavity and space filling 16.

Claims

1.Procedure for the continuous filling of open cavities and gaps and for fastening cables, empty pipes or other additional lines or devices in the sole area along the inner wall of inaccessible sewer pipes, and also in those in which linings and coatings run on or on the inner wall are attached to it or are only attached by the method, by means of a liquid filler which has been added to the tube and which hardens after a certain time and which has adhesive properties, between the contour of the circumference of the remaining free inner tube cross section and the outer radially expandable jacket of an inner pressure standing erectile tissue expanding in the tube, which presses on the contour of the circumference of the remaining free tube inner cross-section at least until the filling compound has hardened, characterized in that an expandable, gas and liquid-tight The inner length of the hose is turned inside out into the sewer pipe in a form-fitting and largely wrinkle-free manner, thereby pushing the excess, liquid filling material in front of the pleat in the sole area of the sewer pipe against the pipe gradient as a free-flowing mirror so that the filling material in the sole cables, empty pipes or other additional lines or devices running along the pipe wall are covered and the open spaces and gaps formed by them are filled until the cables, empty pipes or other additional lines or devices are covered by the turned outside of the hose jacket under compression without air inclusion and after the filling compound has hardened, the hose is either removed from the channel again, or cures itself and remains in the channel as an additional lining.

2. The method according to claim 1, characterized in that the hose is a non-hardenable mounting hose and due to its material properties not glued to the filler and after the positive and non-positive bonding of the cables, empty pipes or other additional Facilities with the sewer structure are removed from the sewer after the hardening compound has hardened.

3. The method according to claim 1, characterized in that the hose is a rehabilitation hose, the turned, resin-soaked wet outside connects with the filler and the integrated cables, empty pipes or other additional lines or devices and together with these on the channel wall to form-fitting Pressure comes and remains in the sewer pipe as additional lining after curing.

4. The method according to claim 3, characterized in that the wet outside of the hose comes to lie directly on the sewer structure together with the filling material and the cables, empty pipes or other additional lines or devices integrated therein and additionally adhesively bonded to it.

5. The method according to claim 1 and 3, characterized in that by the method, an additional hose, a so-called preliner, is fastened in the sewer pipe as a lining by this, the rehabilitation hose, the filler and the cables, empty pipes or other additional lines or devices in Wastewater sewer pipe is encased and together with these comes into positive contact with the sewer wall.

6. The method according to claim 5, characterized in that the preliner consists of a thin, at least radially stretchable, gas- and liquid-tight membrane, which, as a separating layer, prevents additional bonding to the sewer structure.

7. The method according to claim 5, characterized in that the membrane of the preliner has a perforated material structure which also penetrates liquids and thus an additional non-positive bond a preliner directly with the sewer structure.

8. The method according to claim 1, characterized in that the cables, conduits or other additional lines are arranged parallel to each other at a small distance and are coupled to one another after mostly regular lengths.

9. The method according to claim 1 and 8, characterized in that the cable and / or empty pipes or other additional lines, individually or in groups, are coated with a liquid soakable layer, which allows impregnation with the filler during the fastening process in the sewer pipe and thus ensures a defined minimum coating thickness on all sides after curing.

10. The method according to claim 9, characterized in that all cable and / or empty pipes are surrounded together with a loose, gas- and liquid-tight protective cover, which continuously in the sewer pipe according to the slip process of the hose in the direction of the target shaft along the laid cable and / or empty pipes are withdrawn, in such a way that the protective cover is no longer in the area of the filling compound.

11. The method according to claim 1, characterized in that the empty tubes are subjected to internal pressure during their attachment.

12. The method according to claim 1, characterized in that the empty tubes can be heated during their attachment by being flowed through by a previously heated medium.

13. The method according to claim 1, characterized in that the cable, empty pipes or other additional lines together with the filling material after their installation form the bottom of the sewer pipe so that a narrower channel is formed in the bottom than before.