EP2739791B1 - Method of repairing a manhole shaft - Google Patents

Description

The invention relates to a method for rehabilitating a manhole by a lining, a lining produced by the method and a device for producing the lining.

Sewer systems, in particular manholes, are subject to a great variety of thermal, chemical and hydrological loads. Among other things, industry and trade make a significant contribution to a high operational burden. For example, dairies, breweries or the chemical industry generally initiate significant amounts of particularly aggressive substances which themselves or by mixing with other added substances cause chemical reactions during flow.

This pollution in connection with high energy levels of the wastewater (turbulent flow through high sewage inflow, for example, after a flood) in the long term highly abrasive. The progressive surface corrosion on the structures eventually leads to massive damage to the substance over many years. There are sometimes significant cracks in the structure, often occur, for example, at the joints between the manhole rings. On the one hand, an ever-increasing amount of waste water from the sewer system escapes into the environment through the cracks, with correspondingly negative consequences; on the other hand, extraneous water also seeps in, for example if the groundwater level rises, which additionally pollutes the sewage treatment plants. Both sustainably promote corrosion. Duct systems with such damage pictures represent a considerable danger and are urgently in need of renovation.

• Als eher klassische Methode ist der Verputz mit zementgebundenen Beschichtungsmaterialien zu bezeichnen, jedoch fehlt es hier an einer dauerhaften Beständigkeit. Auch die Verwendung von Reaktionsharzbeschichtungen ist problematisch, da sich die Beschichtung unter Blasenbildung vom Untergrund ablösen kann. Mit Beschichtungen kann zwar die Oberfläche versiegelt und so ein Bauwerk geschützt werden, die Tragfähigkeit und die Statik des Bauwerkes werden durch eine dünne Zement- oder Harzschicht jedoch nicht wiederhergestellt.

For the rehabilitation of the sewer system, in particular the shaft structures, various methods are known in the prior art:

• As a more traditional method of plastering with cementitious coating materials to call, but it lacks permanent resistance. The use of reaction resin coatings is problematic, since the coating can peel off bubbles from the substrate. Although coatings can seal the surface to protect a building, the load bearing capacity and structural integrity of the structure are not restored by a thin layer of cement or resin.

Therefore, it is also known to line a manhole with tubes or curved plates, which are made of glass fiber reinforced plastic (GfK). Such GfK materials are characterized by heat, cold and dimensional stability and chemical resistance. Because thermoset plastic parts are insensitive to acid and similar aggressive substances, they represent a suitable material for renovation, especially since components with high wall thicknesses and complex geometries can be produced with high pressure resistance at the same time. The disadvantage, however, is that a complex assembly of the plates to be fitted is required and pipes can not be readily installed in existing sewer systems.

Another method therefore provides to introduce a so-called Schlauchinliner in a channel system to press by means of compressed air to the channel wall and finally cure with a UV light source. DE 39 22 351 A1 describes a process for the rehabilitation of drainage pipes using a gummed inner tube, which is retracted into the respective channel section in the axial direction and unfolded by an expandable bladder and then cured. Out DE 43 26 503 C2 the production of a tubular lining tube of any length is known. However, such is unsuitable for branches and manholes, especially manholes, especially as they are mostly tapered. DE 197 02 649 A1 deals with the sealing of branch pipes with the help of an additional sealing body on an inliner, in order to accomplish the sealing of the connecting pipe with a redevelopment packer. But this method is unsuitable for the sealing of a manhole.

Subject of the DE 699 25 045 T2 is a lining device for sealing and reinforcing the walls of a manhole with a hose, which is composed of at least three layers which are interconnected by seams and whose middle layer seals the lining.

Out DE 10 2009 050 084 For example, a multi-layered hose and a method for its production are known, which can be used for the renovation and lining of pipelines. The tube is made continuously with a constant diameter, to which a flat film is welded at its overlapping longitudinal edges and then pulled through a mounting tube. On the mounting tube simultaneously impregnated with resin longitudinal belts are placed, which are deducted together with the formed by the flat film inner tube and should connect behind the pipe end.

In DE 697 02 876 T2 Finally, a plastic lining for a manhole and a method for its coating are described and illustrated. There, the lining consists of a first placed in a flat shape bag which is inflated after insertion into the manhole, but in conical transitional areas crumple zones and wrinkles are inevitable.

• ▪ Abdichten von Leckstellen,
• ▪ Herstellung einer physikalisch und chemisch widerstandfähigen, gut zu reinigenden Oberfläche,
• ▪ Verbesserung der Standfestigkeit des Schachtes, insbesondere im Bereich von Steigeisen.

The invention has for its object to provide a system for renovating a manhole to achieve the following objectives:

• ▪ sealing leaks,
• ▪ production of a physically and chemically resistant, easy-to-clean surface,
• ▪ Improvement of the stability of the shaft, especially in the area of crampons.

To solve this problem serve according to the invention, the features of the method according to claim 1 and the apparatus according to claim 12. Advantageous developments are subject of the dependent claims.

Figur 1

einen schematischen Längsschnitt eines Kanalschachtes,

Figur 2

eine perspektivische Darstellung einer Form während des Wickelns und Legens einer Auskleidung gemäß der Erfindung,

Figur 3

verschiedene Module für den Einsatz in einer Vorrichtung nach Figur 4,

Figur 4

eine schematische Schnittdarstellung einer Vorrichtung zur Herstellung einer Schachtauskleidung gemäß der Erfindung,

Figur 5

einen möglichen Querschnitt in der Ebene V-V der Figur 4,

Figur 6

eine Wickelvorrichtung für den Einsatz in der Vorrichtung der Figur 4,

Figur 7

eine schematische Darstellung beim Einbringen einer Auskleidung in einen Kanalschacht,

Figur 8

die in Figur 7 dargestellte Auskleidung im aufgeweiteten Endzustand,

Figur 9

eine schematische Darstellung einer Befestigungsvorrichtung für Steigeisen,

Figur 10

die Draufsicht auf einen ausgekleideten Schacht,

Figur 11

in vergrößerter Darstellung einen Ausschnitt aus Figur 10,

Figur 12

die Verlegung von Leitungen zu einem Gerät,

Figur 13

die Leitungseinführung durch die Rückseite in das Gerät,

Figur 14

die Leitungseinführung durch die Außenseite in ein Gerät,

Figur 15

eine Variante der Figur 12 mit einem Verlegekanal,

Figur 16

eine Ansicht des Verlegekanals der Figur 15,

Figur 17

die Ansicht eines Sektors einer Form mit Durchdrückstiften für die Steigeisenbefestigung,

Figur 18

in vergrößerter Darstellung einen Durchdrückstift gemäß Figur 17,

Figur 19

einen Querschnitt durch einen Teil der Form, der Auskleidung und einer Befestigungsscheibe für ein Steigeisen und

Figur 20

einen der Figur 19 entsprechenden Ausschnitt nach Aufweitung und Aushärtung der Auskleidung im Schacht und der Befestigung eines Steigeisens.

The invention is explained below with reference to exemplary embodiments which are illustrated in the drawing. In this show:

FIG. 1

a schematic longitudinal section of a manhole,

FIG. 2

a perspective view of a mold during the winding and laying a lining according to the invention,

FIG. 3

various modules for use in a device according to FIG. 4 .

FIG. 4

a schematic sectional view of an apparatus for producing a manhole lining according to the invention,

FIG. 5

a possible cross-section in the plane VV of FIG. 4 .

FIG. 6

a winding device for use in the device of FIG. 4 .

FIG. 7

a schematic representation when introducing a lining in a manhole,

FIG. 8

in the FIG. 7 illustrated lining in the expanded final state,

FIG. 9

a schematic representation of a fastening device for crampons,

FIG. 10

the top view of a lined shaft,

FIG. 11

in an enlarged view a section of FIG. 10 .

FIG. 12

the laying of cables to a device,

FIG. 13

the cable entry through the back into the device,

FIG. 14

the cable entry through the outside into a device,

FIG. 15

a variant of FIG. 12 with a laying channel,

FIG. 16

a view of the laying channel of FIG. 15 .

FIG. 17

the view of a sector of a form with push-pins for the crampon attachment,

FIG. 18

in an enlarged view a push-through according to FIG. 17 .

FIG. 19

a cross section through part of the mold, the liner and a mounting plate for a crampon and

FIG. 20

one of the FIG. 19 corresponding cutout after expansion and hardening of the lining in the shaft and the attachment of a crampon.

FIG. 1 shows an example of a manhole 10, as defined in DIN V4034-1: 2004-08. Such manholes have a conical shaft neck 12, which is seated on cylindrical shaft rings 14 which are positively connected with each other. In the manhole base 16 is an appearance (Berme 18), in which a channel 24 is inserted, which establishes the connection to a sewer pipe 22. As the upper end of the shaft 10 is located on the conical shaft neck 12, a manhole cover 26, consisting of a frame 28 with Auflageringen 30 and a lid 32. The Auflageringe 30 allow the approximation to the terrain level. After lifting off the lid 32, you can descend via the mounted on the cylindrical shaft wall 34 crampons 36 to the appearance 18 in the shaft bottom.

Often the manholes 10 deviate from the standard specifications. Both in the area of the chute neck 12 with conical transition and the manhole base with the berm 18, there are a variety of training. The proposed according to the invention manufacturing process allows the lining of both the standard forms as well as almost all special forms.

FIG. 2 1 shows the embodiment of a horizontally arranged mold 38 according to the invention for winding and laying a manhole lining 50 (FIG. FIGS. 7 and 8 ), which simulates the inner surface of the manhole 10, but whose diameter is smaller by a certain amount, to take into account the thickness of the manhole liner 50 and their required clearance when introduced into the shaft 10. The mold 38 is made as a hollow body, for example made of sheet metal, composed of different modules according to the manhole shape and in an in FIG. 4 indicated device 20 is used. The example of FIG. 3 shows a number of different modules 38-1, 38-2, 38-3.

In FIG. 4 schematically shown the device 20 for receiving rotary drive for a mold 38, with the aid of a lining 50 can be prepared according to the invention. From a stand 42, a horizontal axis 100 which rotatably attached to the stator 42 and on which a drum 102 via rolling or sliding bearing 104 is rotatably mounted extends. To drive the drum 102 is a variable speed motor 106 which is mounted on the stator 42 and the shaft 108 via a gear 110, the drum 102 is rotated. Alternatively, a pneumatic or hydraulic drive is conceivable.

As already mentioned, the mold 38 is formed as a hollow body, which is composed of juxtaposed modules whose dimensions (length, diameter, cone angle) correspond to the channel shape to be lined. The example shown shows a large cylindrical module 38-1 for the lining of the vertically stacked manhole rings 14, the length of the shaft depth in the adjacent to the berm 18 upwards, cylindrical region (see. FIG. 1 ) and generally a multiple of the diameter is. The subsequent module 38-2 is used to make the lining section for the conical throat 12, followed by a small cylindrical module 38-3 for the neck finish. The juxtaposed modules 38-2, 38-3 are according to FIG. 4 with the closed end of the drum 102 via positive coupling elements 112 rotatably connected.

Of course, it is also possible to produce linings for other shaft cross-sections, for example by combining different modules or by means of polygonal modules 38-1 '.

The FIGS. 4 and 5 indicate the possibility of subdividing at least the large module 38-1 into two or here four circular segments 118 in order to be able to change the diameter. Each segment 118 is supported by at least one radially inwardly projecting leg 120 in a guide 122 projecting from the drum 102. In this way, the segments 118 in the direction of the arrows in the radial direction can be adjusted continuously, for example in the ratio 2: 3 (see. FIG. 5 ) to produce at least two adjacent nominal diameters.

In order to close the gaps between the segments 118 in the radially extended state, arcuate bridging elements 124 may be provided, which are articulated at one end 126 to the adjacent segment 118. The radial adjustment of the segments 118 may be motorized, which is not shown.

The mold 38 is mounted over the drum 102 on the axis 100 flying. This is her in FIG. 4 right end free and can be adapted for the production of differently shaped liners 50 to the respective present form in the region of the chess neck 12.

FIG. 2 1 schematically shows the method for producing the lining 50 with the aid of the mold 38. An inflatable film hose 40 (FIG. FIG. 7 ), which has the task of protecting the mold 38 from adhesive, so that finally the generated lining 50 can be pulled off. The film tube 40 is pinnated in the conical neck area, ie cut from the free end in the longitudinal direction, whereupon the case resulting overlaps are glued from the outside. The joining together of prefabricated foil blanks is possible.

An in FIG. 6 indicated, laterally arranged winding device 130 carries rollers 44 of a stretchable textile tape 46, usually made of fiberglass material, which allows the wrapping of the mold 38 with different angles of inclination to the axis of the mold 38. The winding device 130 has in the example of FIG. 6 a carriage 132 which carries a roller 44 and in the direction of the arrow W of FIG. 4 longitudinally movable relative to the device 20 back and forth.

Additionally or alternatively, stretchable textile bands 46 'can also be inserted axially in the longitudinal direction. These are in FIG. 2 designed as narrow strips; instead, wide bands 46 'can be used, one, two or three of which cover slightly more than the circumference of the mold 38. In several layers, the overlaps are circumferentially offset from each other to largely exclude accumulations of material.

Axially arranged, non-stretchable and thus tensile longitudinal strips 48 ensure the cohesion of the produced composite in the axial direction and against the action of gravity of the liner 50 during assembly in the shaft 10. The tensile longitudinal strips 48 can be led beyond the conical neck part to a suspension the generated lining 50 and the introduction into the manhole 10 to facilitate. In the region of the conical shaft neck 12 textile blanks 98 can be incorporated in the winding, the shape of which correspond to the cone surface of the chute neck 12.

The bands 46, 46 'and 48 and the blanks 98 overlap, resulting in a dimensionally stable bond for the lining 50. The wall thickness can be designed differently in adaptation to the different load loads in different shaft depths.

After completion of the described composite for the lining 50, whose bands 46, 46 'and blanks 98 are dry or preferably wet, ie soaked or soaked with resin, this is surrounded by an outer protective sheath 52 consisting of webs of a stronger film is made of sealing, UV-opaque material, such as a composite film of PA and PE. The least possible to minimize overlap wide webs for this protective sleeve 52 are circumferentially wound on the composite, after which the overlaps are covered by adhesive tapes. The mechanically robust protective sleeve 52 ensures a one-piece, high-strength fiberglass composite for the lining 50 and forms a barrier against the ingress of liquids and gases into the manhole 10.

In FIG. 11 is indicated that on the outside of the protective sheath 52 at 0 °, ie where vertical in the installed position of the liner 50, the vertical passes from bottom to top and is not interrupted by the cone of the chute neck 12, a metal strip 55 can be axially applied , which preferably consists of an aluminum adhesive tape. This makes it possible to check the wall thickness of the lining 50 after hardening at each shaft height with an eddy current measuring device.

Out FIG. 4 shows that now the shape 38 can be slightly reduced in diameter, for which the segments 118 are adjusted radially inwardly, so that the finished GRP lining 50 can be stripped in the axial direction over the free end of the mold 38 (dashed lines) ,

FIG. 7 shows the introduction of the GRP lining 50 in the manhole shaft 10. First, at the level of the lower end of the lining 50 as a working platform and mounting aid, a plate 54 is attached, which fills the shaft cross-section. Thereafter, mounting plates 56 can be provisionally fixed in the grid of a later to be mounted, two-legged or einläufigen arrangement of crampons 36 on the shaft wall 34, for example by gluing 82 (see. FIG. 9 ). On the shaft wall 34, a circumferential, permanently elastic seal 60 is mounted just above the berm 18, in concrete shafts below the lowermost joint 58 between the lowest manhole ring 14 and the berm 18. This establishes the seal between the manhole lining 50 and the shaft wall 34. Into the inner film tube 40, a pressure-tight bag 66 is used, then in the subsequently via a pull cable 78, a disc 62 is lowered, which is supported in the final, lowermost position on the plate 54 on the entrance (Berme) 18 when the GRP lining 50 has taken the intended location in the shaft 10.

The upper end of the bag 66 is sealed pressure-tight with a lid 64. This has a connection 68 for introducing a pressurized medium, preferably Compressed air to inflate the bag 66 can. In addition, the lid 64 has an opening 70 for the introduction of heat energy, preferably via a cable 72 for supplying a UV or infrared radiation source 74 and optionally a further opening for a cable leading to a digital camera.

The prepared for installation GRP lining 50 is now lowered on a hoist 76 so suspended in the manhole 10 that their shape in the height and rotational position coincides with the manhole. Then, the bag 66 is expanded by overpressure, so that the GRP lining 50 unfolds and fits tightly against the shaft wall 34, the sealing ring 60 at the lower end and the mounting plates 56. The force acting on the disc 62 by the positive pressure is supported by the plate 54. The compressive force acting on the lid 64 is absorbed by the lower pulley 62 by the pull cable 78, which extends axially through the bag 66. In this case, the disc 62 comes in a central position within the shaft 10. The radiation source 74 for curing the GRP lining 50 is turned on and moved by means of its supply cable 72 along the traction cable 78 up and down until the liner 50 is cured. In this case, the radiation source 74 moves approximately in the center axis of the lining, so that a uniform hardening is ensured at all points.

When the GRP liner 50 has cured, the overpressure is withdrawn and the radiation source 74 is turned off. After removing the lid 64 with the radiation source 74, the lower disc 62 and the sack 66 can be pulled out by means of the pull cable 78 and the plate 54 can be removed. In this case, the film tube 40 is removed. The upwardly and downwardly projecting ends of the liner 50 and the outer protective sheath 52 are finally severed.

In FIG. 7 the refurbished manhole well 10 is shown with final lining 50.

To attach the crampons 36, there are several possibilities. According to FIG. 9 one marks the mounting locations on the inner surface of the GRP lining 50 with the same dimensions that were previously used in the attachment of the mounting plates 56. Then drill the mounting holes for the crampons 36 in the mounting plates 56. The crampons 36 can be fixed with screws and blind nuts 80 which are mounted behind the mounting plates 56. The mounting plates 56, through the Lining 50 are covered, may be equipped to locate them with a small permanent magnet 128.

Alternatively, there is the in FIG. 11 indicated possibility, instead of the mounting plates 56 between the shaft wall 34 and liner 50 female shims 53 with internal thread in the manufacture of the liner 50 between this and the outer protective sheath 52 incorporated. This is below based on the FIGS. 17 to 20 explained.

1. a) Keine Dübelbohrungen in der Schachtwand 34, die Leckstellen erzeugen würden;
2. b) bereits geschädigte Schachtwände 34 werden in ihrer Tragfähigkeit nicht geschwächt;
3. c) die Befestigung an der Auskleidung 50 gewährleistet eine dauerhafte Belastbarkeit.

The attachment of the crampons 36 to the liner 50 has the following advantages:

1. a) No dowel holes in the shaft wall 34 that would create leaks;
2. b) already damaged shaft walls 34 are not weakened in their carrying capacity;
3. c) the attachment to the liner 50 ensures a durable load capacity.

In manholes 10 increasingly measuring, control and other devices 84 are attached. The associated cables and lines 86 are usually laid on the shaft wall 34 and hinder the cleaning there.

According to a development of the invention according to the FIGS. 12 to 15 For example, the conduits 86 may be routed in the space between the liner 50 and the shaft wall 34 so that they can not interfere with cleaning nor be damaged during operation in the shaft 10. The devices 84 are, as already the attachment of crampons 36 in FIG. 9 shows screwed onto mounting plates 56. The use of blind nuts 80 also allows a later determination of the hole pattern for their attachment.

Also cable bushings can be installed later. The cables 86 are usually brought to the shaft 10 in protective tubes 88 in the ground. There, a sufficiently large bore 90 is mounted in the shaft wall 34 with a core drill. Of the bore 90 lead on the inner surface of the shaft wall 34 flexible plastic insulating tubes 92 or dimensionally stable, but soft plastic channels 94 ( FIG. 16 ) To the mounting plate 56. They are first attached by gluing 82 provisionally on the shaft wall 34.

In principle, instead of electrical lines 86, hoses can also be laid in this way. The diameters of the insulating tubes 92 or the dimensions of the cable channels 94 find their limits on the stability of the GRP lining 50 and must be interpreted after the local force.

When the liner 50 has been attached, it conforms to the attachment plates 56 and the insulating tubes 92 or cable channels 94 and holds them firmly in place. The passage of the leads 86 through the well casing to the device 84 must be sealed by cable glands. The bore 90 in the shaft wall 34 must be closed with the mounting foam 96 until it is used for the lines 86. The mounting foam 96 can be easily removed before laying the lines 86. After installation, the bore 90 can be re-sealed in the same way.

The in the FIGS. 12 to 16 illustrated developments have the advantage that the supply lines are laid behind the shaft lining 50 of GfK. In addition, dowel holes in the shaft wall 34 and thus possible leaks are avoided.

The FIGS. 17 to 20 show a way of making the attachment of crampons 36, as in FIG. 11 is indicated. There, the crampons 36 are not bolted to mounting plates 56, as in the FIGS. 12 to 14 are shown, but on mounting plates 53 with approximately square shape and beveled expiring edges 57th

In FIG. 17 a circular segment of the mold 118 is shown, on which push-through pins 63 are placed in pairs according to the intended arrangement of the fastening screws 73 for the crampons 36. In making the textile composite for the liner 50 on the mold 118, these pins 63 create holes 67 which serve to subsequently receive laminating nuts 80 which are part of the mounting disks 53. After completion of the textile composite, the push-through pins 63 are removed from their latching to the outside or they are supported by a device, together lowered below the support surface of the mold 38.

FIG. 18 shows an example of a push-through pin 63, which may alternatively have a rotationally symmetric tip 65 or an inclined tip 65 '. In the form of sleeves 38 61 are fixed, in which the shaft 114 of the push-through pin 63 by means of a spring ring 116 engages. The desired rotational position of the pin 63 with oblique tip 65 'can be adjusted via a slot 115 in the shaft 114. In the top 65, 65 'is a transverse bore 117 for inserting a tool by means of which the pin 63 can be pulled out again after completion of the lining 50.

The attachment washers 53 for introducing the forces occurring on the crampon 36 into the lining 50 are made of synthetic resin, for example GRP, into which two nuts 80 are laminated. The attachment discs 53 are placed on the textile composite of the liner 50 so that the protruding parts 69 of the nuts 80 dive into the holes 67. Subsequently, as in FIG. 17 indicated, the fixing plates 53 provisionally fixed with adhesive strips 71. Finally, as already explained, the lining 50 is covered with a protective sheath 52, which does not have to be pierced in this process for fastening the crampons 36.

After the liner 50 is inserted into the shaft 10, the crampons 36 are fastened by means of threaded bolts 73, which are screwed into the laminated nuts 80 (see. FIG. 20 ).

1. 1. Die Auskleidung 50 ist ein einstückiges Formteil, welches vom Schachtdeckel 32 bis kurz über die Berme 18 hinabreicht und die Form des Schachtes 10 nachbildet;
2. 2. Der Werkstoffverbund besteht vorzugsweise aus mit Harz getränktem Glasfaser-Werkstoff mit den nachstehenden Eigenschaften:
   • hohe Dichtigkeit gegen Gase und Flüssigkeiten,
   • mechanisch und chemisch widerstandsfähig, bei entsprechenden Werkstoffen auch gegen aggressive Chemikalien,
   • glatte Oberfläche, die sich gut reinigen lässt,
   • hohe Lebensdauer;
3. 3. Die Schutzhülle 52 der Auskleidung 50 ist auf der Außenfläche angeordnet;
4. 4. Die Auskleidung 50 kann in verschiedenen Bereichen unterschiedliche Wandstärken haben, entsprechend den örtlich verschiedenen Lasten;
5. 5. Mit der Auskleidung 50 können Schächte 10 mit verringerter Standfestigkeit wieder stabilisiert werden;
6. 6. Die Erfindung ermöglicht eine Technik, um Steigeisen 36 und Geräte 84 an der Auskleidung 50 zu befestigen;
7. 7. Die Erfindung ermöglicht, Leitungen 86 u. dgl. im Raum zwischen Schachtwand 34 und Auskleidung 50 zu verlegen.

The invention provides a system whose essential advantages are indicated below:

1. 1. The liner 50 is a one-piece molding, which extends down from the manhole cover 32 to just over the Berme 18 and the shape of the shaft 10 simulates;
2. 2. The composite material is preferably made of resin impregnated glass fiber material having the following properties:
   • high tightness against gases and liquids,
   • mechanically and chemically resistant, with appropriate materials also against aggressive chemicals,
   • smooth surface that is easy to clean,
   • long life span;
3. 3. The protective cover 52 of the liner 50 is disposed on the outer surface;
4. 4. The lining 50 may have different wall thicknesses in different areas, according to the locally different loads;
5. 5. With liner 50, wells 10 can be re-stabilized with reduced stability;
6. 6. The invention provides a technique for attaching crampons 36 and equipment 84 to the liner 50;
7. 7. The invention allows lines 86 u. Like. To move in the space between shaft wall 34 and lining 50.

Claims (16)

1. A method for renovating a sewer manhole, characterized by the following steps:

   a. pulling an inflatable film sleeve (40) onto a mold (38) corresponding to the sewer manhole profile,

   b. wrapping and/or laying at least one extensible textile strip (46, 46') of the film sleeve (40) pulled onto the mold (38), at least one non-extensible high-tensile-strength longitudinal strip (48) also being laid in an axial direction between the strips (46, 46'),

   c. attaching a protective sheath (52) enclosing the liner (50) manufactured in this manner,

   d. pulling the liner (50) off the mold (38) that has been reduced in a radial direction,

   e. inserting the liner (50) into a sewer manhole (10) to be renovated, and introducing a pressure-tight bag (66) into the inner film sleeve (40) of the liner (50),

   f. sealing the liner (50) at the upper end and inflating until it abuts against the manhole wall (34),

   g. curing the resin-impregnated liner (50).
2. The method according to Claim 1, wherein a metal band (55) is applied in a longitudinal direction onto the outer side of the protective sheath (52).
3. The method according to Claim 1 or 2, wherein upon manufacture of the textile composite in accordance with step b., textile cut pieces (98) are incorporated in order to cover non-cylindrical shaped parts.
4. The method according to one of the preceding claims, wherein in order to manufacture the protective sheath (52), wide webs of a thicker film made of UV-opaque material, which overlap at their edges, are laid in a circumferential direction onto the liner (50).
5. The method according to one of the preceding claims, wherein the strips (46, 46') and cut pieces (98) are made of glass-fiber material.
6. The method according to one of the preceding claims, wherein the liner (50) is produced in a position rotating around a horizontal axis.
7. The method according to one of the preceding claims, wherein the textile strips (46, 46') and cut pieces (98) either are applied dry and then impregnated with resin, or are applied having just been impregnated with resin.
8. The method according to one of the preceding claims, wherein in order to cure the liner (50), a source (74) of IR or UV radiation is introduced thereinto from above and is moved back and forth therein in the center axis.
9. The method according to one of the preceding claims, wherein for the fastening of ladder rungs (36) or devices (84), fastening panels (56) are inserted between the liner (50) and the manhole wall (34), or fastening plates (53) having embedded nuts (80) are inserted between the liner (50) and the protective sheath (52).
10. The method according to one of the preceding claims, wherein a sealing ring (60) is inserted between the lower end of the liner (50) and the manhole wall (34).
11. A liner (50) for sewer manholes (12) to be renovated, manufactured using the method according to one of the preceding claims.
12. An apparatus for manufacturing a liner (50) according to one of Claims 1 to 11, wherein it is made up of a variable mold (38) that is assembled from modules (38-1, 38-2, 38-3) of different shapes and sizes in accordance with the sewer manhole (10) to be renovated.
13. The apparatus according to Claim 12, wherein the modules are mounted on a drum (102) that is driven rotatably around a horizontal axis.
14. The apparatus according to Claim 13, wherein the drum (102) is mounted in cantilevered fashion on a stationary axle (100).
15. The apparatus according to one of Claims 12 to 14, wherein at least one of the modules (13-1) is assembled from circle segments (118) that are radially displaceable in order to modify the diameter.
16. The apparatus according to Claim 15, wherein adjacent circle segments (118) are connected to one another by arc-shaped bridging elements (124).

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