JP2015514168A - System for repairing sewer manholes - Google Patents

Abstract

The method is used to repair a sewer manhole, a. Covering the inflatable film hose (40) over a mold (38) corresponding to a sewer manhole profile; b. At least one longitudinal direction having a non-stretchable tensile strength by wrapping and / or placing at least one stretchable fabric belt (46, 46 ') around a film hose (40) placed over a mold (38) A belt (48) is also inserted axially between the fabric belts (46, 46 '); c. Attaching a protective cover (52) surrounding the lining (50) thus formed; d. Removing the lining (50) from the radially reduced mold (38); e. Inserting the lining (50) into the sewer manhole (10) to be repaired and introducing a pressure tight bag (66) into the film hose (40) inside the lining (50); f. Sealing the lining (50) at the top and inflating until it abuts against the shaft wall (34); g. Curing the resin impregnated lining (50). Variable mold (38) consisting of modules (38-1, 38-2, 38-3) of different shapes and sizes depending on the sewer manhole (10) to be repaired to form the lining (50) Is used.

Description

  The present invention relates to a method for repairing a sewer manhole by lining, a lining formed by this method, and an apparatus for forming the lining.

  Sewer network systems, especially manholes, are subject to various thermal, chemical and hydrological loads. In particular, industries and businesses make a significant contribution to high management loads. For example, dairy farms, breweries or the chemical industry generally introduce significant amounts of particularly aggressive substances that cause chemical reactions in the stream by mixing with substances already in themselves or with other incoming substances.

  This filth shipment acts to erode strongly over time in relation to high energy levels of wastewater (eg, turbulence due to high wastewater inflow after flooding). Gradual surface corrosion in the building eventually results in considerable damage to the support material after several years. Sometimes significant cracks occur in the building, and often cracks occur, for example, at seams between manhole rings. On the one hand, an increasing amount of sewage due to cracks flows out of the sewer system into the environment with correspondingly negative consequences, on the other hand, for example when the groundwater level rises, which additionally loads the purification device Soaked out water. Both continuously promote corrosion. A sewer system having such a damage pattern is extremely dangerous and needs to be repaired urgently.

  Different methods are known from the prior art for repairing sewer systems, in particular manhole buildings:

  Overcoating with a cemented coating material can be called a more classical approach, but here it lacks permanent resistance. The use of reactive resin coatings is also problematic because bubbles can be generated and the coating can be peeled off from the foundation. Certainly, the coating can seal the surface and protect the building, but the support and statics of the building are not restored by the thin cement or resin layer.

  It is therefore also known to line sewer manholes with tubes or bent plates made from glass fiber reinforced plastic (GRP). Such GRP materials are distinguished by high temperature resistance, low temperature resistance, deformation resistance and chemical resistance. Since thermoset plastic parts are insensitive to acids and similar aggressive materials, they can simultaneously produce parts with thick wall thickness and complex geometry with high compressive strength. More particularly, it is a suitable material for repair. However, the disadvantage is that expensive mass production of the plates to be adapted is required and the tubes cannot easily be attached to existing sewer systems.

  Therefore, in another approach, a so-called hose inliner is introduced into the sewer system, pressed against the sewer wall with compressed air, and finally cured with an ultraviolet light source. For this reason, German Patent Application Publication No. 39 22 351 (Patent Document 1) is a resin that is inserted axially into the relevant sewer section, spread by a stretchable bag, and then cured. A method for repairing a drain tube using an inner tube is described. It is known from DE 43 26 503 (Patent Document 2) to form a tubular lining hose of any length. However, such lining hoses are even more unsuitable for bifurcations and sewer manholes, especially manhole necks, since they mainly taper in a conical shape. German Patent Application Publication No. 197 02 649 (Patent Document 3) is working on sealing of a branch pipe by an auxiliary sealing body in an inliner in order to realize the sealing of a connecting pipe by a repair packer. However, this method is also unsuitable for sewer manhole seals.

  German Patent Application Publication No. 699 25 045 (Patent Document 4) has the object of sealing a manhole wall by a hose consisting of at least three layers whose core layers are joined together by a seam and whose central layer seals the lining. It is a lining device for strengthening.

  From DE 10 2009 050 084 (Patent Document 5), a multi-layer hose that can be used for repairing and lining pipelines and a method for manufacturing this hose are known. The hose is continuously manufactured with a constant diameter, so that the flat film is welded on its overlapping longitudinal perimeter and then passed through the mounting tube. A longitudinal belt simultaneously impregnated with resin is arranged on the mounting tube, and this longitudinal belt is removed together with an inner hose constituted by a flat film and joined together after the tube end.

  German Patent Application Publication No. 697 02 876 (Patent Document 6) describes and illustrates a plastic lining for manholes and a method for coating the lining. There, the lining consists of a flat shaped bag, which is inflated after introduction into the manhole, but wrinkled zones and folds are unavoidable at the conical transition. is there.

German Patent Application Publication No. 39 22 351 German Patent No. 43 26 503 German Patent Application Publication No. 197 02 649 German Patent Application Publication No. 699 25 045 German Patent No. 10 2009 050 084 German Patent Application Publication No. 697 02 876

The problem underlying the present invention is:
-Sealing leak points-Forming a physically and chemically resistant, well-cleanable surface-Repairing sewer manholes to achieve the goal of improving manhole stability, especially in the area of manhole steps It is to provide a system for doing this.

  In order to solve this problem, the method according to claim 1 or the features of the device according to claim 12 are useful. Advantageous developments are the subject of the dependent claims.

  The invention will now be described by way of example illustrated in the drawings.

Schematic longitudinal section of sewer manhole Figure 3 is a perspective view of a mold during winding and placement of a lining according to the present invention. Different modules for use in the device according to FIG. Schematic sectional view of an apparatus for forming a manhole lining according to the present invention Possible cross-sectional view in plane V-V of FIG. Winding device for use in the device according to FIG. Schematic diagram when introducing lining into sewer manhole The final state of the lining shown in FIG. Schematic of fixing device for manhole step Top view of lined manhole 10 is an enlarged view of a part of FIG. Laying wiring on equipment Wiring introduction part to equipment passing through the back Wiring introduction part to equipment passing through the external surface Variation of Fig. 12 with installation channel Diagram of installation channel in FIG. Illustration of a mold sector with penetrating pins for manhole steps Enlarged view of the through pin according to FIG. Cross section of fixed disk for lining and manhole step through part of mold Part of the manhole lining and the fixed part of the manhole step after expansion and hardening according to FIG.

  FIG. 1 schematically shows a sewer manhole 10 as defined in DIN V4034-1: 2004-08. Such a sewer manhole has a conical manhole neck 12, which is mounted on a cylindrical manhole ring 14 which is coupled together in a meshing manner. In the manhole lower part 16, there is a step part (small step) 18, and a water channel 24 is inserted into this step, and this water channel forms a connection part to the sewer pipe 22. A manhole cover 26 including a frame 28 having a support ring 30 and a lid 32 is placed on the conical manhole neck 12 as an upper end of the manhole 10. The support ring 30 allows adaptation to the ground surface. After removing the lid 32, a person can go down to the footrest 18 in the manhole bottom through a manhole step 36 attached to the cylindrical manhole wall 34.

  Often deviates from the sewer manhole 10 standard specifications. There are the most different formations in both regions of the manhole neck 12 with the conical transition and the manhole bottom with the step 18. The manufacturing method carried out according to the invention allows both a standard specification and almost all special types of lining.

  FIG. 2 shows the configuration of a mold 38 arranged horizontally for winding and positioning the manhole lining 50 (FIGS. 7 and 8) provided by the present invention, which molds the inner surface of the sewer manhole 10. Although imitating, the diameter is small by a predetermined value in order to take into account the thickness of the manhole lining 50 and its play required when introduced into the manhole 10. The mold 38 is manufactured, for example, from a sheet material as a hollow body, and this hollow body is composed of different modules depending on the shape of the manhole, and is used in the apparatus 20 suggested in FIG. The example of FIG. 3 shows a row of different modules 38-1, 38-2, 38-3.

  FIG. 4 schematically shows a device 20 for housing with a rotary drive for a mold 38 capable of forming a lining 50 according to the invention. A horizontal shaft 100 extends from the stand 42, and the horizontal shaft is fixed to the stand 42 so as not to rotate. A drum 102 is rotatably supported on the horizontal shaft via a rolling or sliding bearing 104. A motor 106 capable of adjusting the rotation speed is used for driving the drum 102, and this motor is attached to the stand 42, and its shaft 108 rotates the drum 102 via the gear unit 110. Alternatively, pneumatic or hydraulic drive devices are also conceivable.

  As already mentioned, the mold 38 is formed as a hollow body, which consists of modules arranged side by side, whose dimensions (length, diameter, cone angle) are the manholes to be lined. Corresponds to the shape. The illustrated example shows a large cylindrical module 38-1 for lining the vertically overlapping manhole rings 14, the length of which is a cylindrical area (see FIG. 1)), which is generally four times the diameter. The following module 38-2 is used to form a lining portion for the conical manhole neck 12, followed by a small cylindrical module 38-3 for the neck end. Adjacent modules 38-2, 38-3 are non-rotatably coupled to the closed end of the drum 102 via a meshing coupling element 112 according to FIG.

  Of course, linings for other manhole cross sections can also be formed, for example, by different module combinations or polygonal modules 38-1 '.

  4 and 5 suggest the possibility of dividing the large module 38-1 into two or here four circular segments 118 so that the diameter can be changed. Each segment 118 is supported in a guide 122 projecting from the drum 102 by at least one leg 120 projecting radially inward. In this way, the segment 118 is displaced steplessly in the direction of the entered radial arrow, for example at a ratio of 2: 3 (see FIG. 5), so that at least two nominal diameters can be generated. Can be made.

  An arcuate bridging element 124 having one end 126 pivoted to an adjacent segment 118 may be provided to close the gap between the segments 118 in a radially extended state. The radial displacement of the segment 118 can be performed by a motor, but this is not further illustrated.

  The mold 38 is cantilevered on the shaft 100 via the drum 102. This allows its end on the right in FIG. 4 to be free and adapted to the respective shape in the region of the manhole neck 12 for the production of the lining 50 formed differently.

  FIG. 2 schematically illustrates a method for forming a lining 50 with a mold 38. The mold 38 is first covered with an inflatable film hose 40 (FIG. 7) that protects the mold 38 from adhesive so that the formed lining 50 can be finally removed. Have the following problems. The film hose 40 is bladed in the conical neck region, ie cut longitudinally from the free end, on which the resulting overlap is glued from the outside. Bonding of pre-manufactured film blanks is also possible.

  The laterally arranged wrapping device 130 suggested in FIG. 6 supports the rollers 44 of a stretchable fabric belt 46, usually made of glass fiber material, with different angles of inclination 38 relative to the axis of the mold 38. Enables winding. In the example of FIG. 6, the winding device 130 has a carriage 132, which supports the roller 44 and can reciprocate relative to the device 20 in the longitudinal direction in the direction of arrow W in FIG. 4. It is.

  Additionally or alternatively, a longitudinally stretchable fabric belt 46 'can be inserted in the axial direction. These are formed as narrow strips in FIG. 2, but instead, wide belts 46 ′ can be used, each one of which, two, or three of which are Cover somewhat more than the periphery of the mold 38. In the case of multiple layers, the overlap portions are offset from one another in the circumferential direction to sufficiently eliminate material accumulation.

  A longitudinal belt 48 having a non-stretchable tensile strength arranged in the axial direction allows the formed composite to be bundled axially and against the action of gravity of the lining 50 when installed in the manhole 10. Guarantee. The longitudinal belt 48 having tensile strength can be protruded from the conical neck portion to facilitate suspension of the formed lining 50 and introduction into the sewer manhole 10. Within the region of the conical manhole neck 12, the roll can incorporate a fabric blank 98 that matches the conical surface of the manhole neck 12.

  Because the belts 46, 46 ′ and 48 and the blank 98 overlap, a morphologically stable composite is obtained for the lining 50. The wall thickness can be formed at different thicknesses to suit different loadings at different manhole depths.

  After the belt 46, 46 'and the blank 98 are dry or in particular wet, i.e. finish the composite for the lining 50 wrapped or placed impregnated with resin, the composite is The protective cover 52 is comprised of a thick film of a hermetic UV opaque material, for example a composite film web of PA and PE. The web for this protective cover 52, which is as wide as possible to minimize the overlap location, is wrapped around the composite in the circumferential direction, after which the overlap is covered with adhesive tape. A mechanically rugged protective cover 52 ensures a high loadable integral GRP composite for the lining 50 and constitutes a barrier to liquid and gas ingress in the sewer manhole 10.

  FIG. 11 shows an aluminum adhesive, especially at 0 ° outside the protective cover 52, ie where the perpendicular passes from bottom to top at the vertical mounting position of the lining 50 and is not interrupted by the cone of the manhole neck 12. It has been suggested that a metal strip 55 made of tape can be attached in the axial direction. This metal strip allows the thickness of the cured lining 50 to be inspected by an eddy current measuring instrument at each manhole height.

  From FIG. 4 it can be seen that the mold 38 can be somewhat smaller in diameter, so that the segment 118 is displaced radially inward, thereby allowing the finished GRP lining 50 to move freely in the mold 38 in the axial direction. It can be seen that it can be peeled off through the edges (filled in broken lines).

  FIG. 7 shows the introduction of the GRP lining 50 into the sewer manhole 10. First, at the height of the lower end of the lining 50, a plate 54 that fills the manhole cross section is attached as a work platform and a mounting aid. Thereafter, the fixing plate 56 can be temporarily fixed to the manhole wall 34 by, for example, an adhesive 82 in a pattern of a single body or a single body to be attached after the manhole step 36 (see FIG. 9). The manhole wall 34 has an annular seal 60 which is permanently elastic, just above the step 18 and, in the case of a concrete manhole, below the lower manhole ring 14 and the lower joint 58 between the steps 18. Is attached. This seal forms a seal between the manhole lining 50 and the manhole wall 34. A pressure-tight bag 66 is inserted into the inner film hose 40, and the disc 62 is subsequently lowered into the bag via a tow rope 78. The disc has a GRP lining 50 at a predetermined position in the manhole 10. Is supported by the step (step) 18 within the final lowest position on the plate 54.

  The upper end of the bag 66 is pressure-tightly closed by the lid 64. This lid has a connection 68 for introducing a medium under positive pressure, preferably compressed air, so that the bag 66 can be inflated. In addition, the lid 64 has an opening 70 for introducing thermal energy, in particular via a cable 72 for supply to an ultraviolet or infrared radiation source 74 and possibly another opening for a cable leading to a digital camera. Have

  The GRP lining 50 prepared for attachment is lowered by being hung on the hoist 76 so that the shape at the height position and the rotation position matches the manhole shape. Next, since the bag 66 is expanded by the positive pressure, the GRP lining 50 expands and comes into close contact with the manhole wall 34, the lower end seal ring 60, and the fixed plate 56. The force acting on the disk 62 by the positive pressure is supported by the plate 54. The pressure acting on the lid 64 is received by the lower disk 62 by a tow rope 78 extending axially through the bag 66. In this case, the disk 62 comes to the center position in the manhole 10. The radiation source 74 for curing the GRP lining 50 is activated and moved up and down along the tow rope by its supply cable 72 until the lining 50 is cured. In this case, since the radiation source 74 moves, for example, within the central axis of the lining, uniform curing is guaranteed at all points.

  When the GRP lining 50 is cured, the positive pressure is retreated and the radiation source 74 is turned off. After removing the lid 64 along with the radiation source 74, the lower disk 62 and bag 66 can be pulled out by the tow rope 78 and the plate 54 can be removed. In this case, the film hose 40 is also taken out. The protruding upper and lower ends of the lining 50 and the protective cover 52 are finally separated.

  In FIG. 8, a repaired sewer manhole 10 with a final lining 50 is shown.

  There are several possibilities for fixing the manhole step 36. According to FIG. 9, a person marks the mounting location on the inner surface of the GRP lining 50 with the same dimensions as previously used when mounting the fixed plate 56. Next, the person drills a fixing hole for the manhole step 36 in the fixing plate 56. The manhole step 36 can be fixed by screws and cap nuts 80 attached after the fixing plate 56. The fixed plate 56 covered by the lining 50 can be provided with a permanent magnet 128 for its position measurement.

  Optionally, instead of the fixing plate 56 between the manhole wall 34 and the lining 50, a fixing disk 53 with internal threads is suggested in FIG. 11 to incorporate between the lining and the outer protective cover 52 when forming the lining 50. there is a possibility. This will be further described below with reference to FIGS.

Fixing the manhole step 36 in the lining 50 has the following advantages:
a) There are no dowel holes in the manhole wall 34 that cause leaks. b) The already damaged manhole wall 34 cannot be reduced in its supporting capacity. c) The fixing in the lining 50 is a permanent load. Guarantee ability

  Increasingly, measuring equipment, control equipment and other equipment 84 are installed in the sewer manhole 10. The cables and wiring 86 connected thereto are usually installed on the manhole wall 34 where they interfere with the cleaning operation.

  12-15, the wiring 86 can be installed in the space between the lining 50 and the manhole wall 34, so that these wiring can interfere with cleaning or the manhole 10 It will not be damaged when working inside. The instrument 84 is screwed to the fixing plate 56 as already indicated by the fixing of the manhole step 36 in FIG. The use of cap nuts 80 also allows later determination of the drilling pattern to secure them.

  Cable bushings can also be installed later. The cable 86 is led into the manhole 10 in the ground, usually in a conduit 88. Therefore, a sufficiently large perforation 90 is formed in the manhole wall 34 by a core drill. From this perforation 90, along the inner surface of the manhole wall 34, a flexible plastic insulating tube 92 or a stable but flexible plastic channel 94 (FIG. 16) in form leads to the fixed plate 56. These are first temporarily fixed to the manhole wall 34 by an adhesive 82.

  Basically, hoses can be installed in this manner instead of the electrical wiring 86. The diameter of the insulating tube 92 or the dimensions of the cable channel 94 have limits on the stability of the GRP lining 50 and must be designed in response to local force effects.

  When the lining 50 is attached, the lining adheres to the fixing plate 56 and the insulating tube 92 or the cable channel 94, and the lining eventually holds its position. The guide of the wiring 86 to the device 84 that has undergone manhole lining must be sealed through the screw fixing portion of the cable. The perforations 90 in the manhole wall 34 must be closed with foam 96. The foam 96 can be easily removed before the wiring 86 is installed. After installation, the perforations 90 can be resealed as well.

  12-16 has the advantage that a supply line is installed behind the manhole lining 50 made of GRP. In addition, dowel holes in the manhole wall 34 and possible leak locations are avoided.

  FIGS. 17-20 show the possibility to form the fixed part of the manhole step 36 as suggested in FIG. Here, the manhole step 36 is not screwed to the fixing plate 56 but screwed to a fixing disk 53 having a substantially square shape, and the protruding edge 57 is chamfered.

  In FIG. 17, a circular segment 118 of the mold is illustrated, and through pins 63 are arranged in pairs in this circular segment according to a predetermined arrangement of the fixing screw 73 for the manhole step 36. When forming the fabric composite for the lining 50 in the mold 118, these pins 63 create holes 67 that are for subsequent accommodation of the laminated nuts 80 that are part of the fixed disk 53. used. After finishing the fabric composite, the penetrating pin 63 is either removed outward from its locking portion or supported by the device and both are submerged below the support surface of the mold 38.

  FIG. 18 shows an example of a penetrating pin 63 that can have a selectively rotationally symmetric tip 65 or an inclined tip 65 '. Sleeves 61 are fixed in the mold 38, and the manholes 114 of the penetrating pins 63 are locked in the sleeves by spring rings 116. The desired rotational position of the pin 63 having the inclined tip 65 ′ can be adjusted via the slit 115 in the manhole 114. The front ends 65 and 65 ′ have a lateral hole 117 for inserting a tool, and the pin 63 can be pulled out again after finishing the lining 50 by the tool.

  The fixed disk 53 for introducing the force generated in the manhole step 36 to the lining 50 is made of a synthetic resin, for example, GRP, in which two nuts 80 are laminated. The fixed disk 53 is arranged on the cloth composite of the lining 50 so that the protruding portion 69 of the nut 80 is immersed in the hole 67. Next, as suggested in FIG. 17, the fixed disk 53 is provisionally fixed by the adhesive tape 71. Finally, the lining 50 is covered by a protective cover 52, as already described, which need not be perforated in order to secure the manhole step 36 in this way.

  After the lining 50 is inserted into the manhole 10, the manhole step 36 is fixed by a threaded bolt 73 that is screwed into the laminated nut 80 (see FIG. 20).

The present invention provides one system, the advantages of which are described below:
1. The lining 50 is an integral mold part that mimics the shape of the manhole 10 reaching from the manhole lid 32 to just above the steps 18.
2. The material composite consists in particular of a glass fiber material impregnated with a resin having the following properties:
・ High sealing performance against gases and liquids ・ Mechanical and chemical resistance to aggressive chemicals when corresponding materials are used ・ Smooth surface that can be cleaned well ・ Long life A protective cover 52 of the lining 50 is disposed on the outer surface.
4). The lining 50 can have different wall thicknesses in different areas depending on locally different loads.
5). The manhole 10 whose stability has been lowered by the lining 50 can be stabilized again.
6). The present invention allows a technique for securing the manhole step 36 and equipment 84 to the lining 50.
7). The present invention makes it possible to install the wiring 86 and the like in the space between the manhole wall 34 and the lining 50.

10 Sewer Manhole 12 Manhole Neck 14 Manhole Ring 16 Lower Manhole 18 Stepping Section 22 Sewer Pipe 24 Waterway 26 Manhole Cover 28 Frame 30 Support Ring 32 Lid 34 Manhole Wall 36 Manhole Step 38 Type 38-1 Module 38-2 Module 38-3 Module 42 Stand 44 Roller 46 Fabric belt 46 'Fabric belt 48 Longitudinal belt 50 Manhole lining 52 Protective cover 53 Fixed disk 54 Plate 55 Metal strip 56 Fixed plate 57 Edge 58 Seam 60 Seal 61 Sleeve 62 Disk 63 Penetration pin 64 Lid 65 Tip 65 'Tip 66 Bag 67 Hole 68 Connection 69 Projection 70 Opening 71 Adhesive tape 72 Cable 73 Fixing screw 74 UV or red Line radiation source 76 Hoist 78 Tow rope 80 Cap nut 82 Adhesive 84 Equipment 86 Wiring 88 Conduit 90 Perforation 92 Plastic insulation tube 94 Plastic channel 96 Foam 98 Cloth blank 100 Horizontal shaft 102 Drum 104 Rolling or sliding bearing 106 Motor 108 Motor Shaft 110 Gear unit 112 Coupling element 114 Manhole 115 Slit 116 Spring ring 117 Horizontal hole 118 Circular segment 120 Leg part 122 Guide 124 Bridge element 128 Permanent magnet 130 Winding device 132 Carriage

Claims (16)

a. Covering the inflatable film hose (40) over a mold (38) corresponding to a sewer manhole profile;
b. At least one longitudinal direction having a non-stretchable tensile strength by wrapping and / or placing at least one stretchable fabric belt (46, 46 ') around a film hose (40) placed over a mold (38) A belt (48) is also inserted axially between the fabric belts (46, 46 ');
c. Attaching a protective cover (52) surrounding the lining (50) thus formed;
d. Removing the lining (50) from the radially reduced mold (38);
e. Inserting the lining (50) into the sewer manhole (10) to be repaired and introducing a pressure-tight bag (66) into the film hose (40) inside the lining (50);
f. Sealing the lining (50) at the upper end and inflating until it abuts against the manhole wall (34);
g. Curing the resin impregnated lining (50);
A method for repairing a sewer manhole, characterized by comprising:   The method according to claim 1, characterized in that a metal strip (55) is attached longitudinally outside the protective cover (52).   3. A method according to claim 1 or 2, characterized in that in forming the fabric composite according to step b, a fabric blank (98) is incorporated to cover the non-cylindrical mold part.   In order to form the protective cover (52), a wide web of thick film of UV opaque material is placed circumferentially on the lining (50), and the perimeter of this web overlaps The method according to any one of claims 1 to 3.   5. A method according to any one of claims 1 to 4, characterized in that the belt (46, 46 ') and the blank (98) are made of glass fiber material.   6. A method according to any one of the preceding claims, characterized in that the lining (50) is formed in a state of rotation about a horizontal axis.   The fabric belt (46, 46 ') and the blank (98) are mounted in a dry state and then impregnated with resin or immediately after impregnation with resin. The method of any one of these.   8. An infrared or ultraviolet radiation source (74) is introduced from above into the lining to cure the lining (50) and is reciprocated within a central axis therein. The method according to claim 1.   For fixing the manhole step (36) or the instrument (84), a fixing plate (56) is inserted between the lining (50) and the manhole wall (34) or has a laminated nut (80). 9. A method according to any one of the preceding claims, characterized in that a fixed disk (53) is inserted between the lining (50) and the protective cover (52).   10. A method according to any one of the preceding claims, characterized in that a seal ring (60) is inserted between the lower end of the lining (50) and the manhole wall (34).   A lining (50) for a sewer manhole (10) to be repaired, formed by the method according to any one of the preceding claims. In the apparatus for forming the lining according to any one of claims 1 to 11,
This device consists of a variable mold (38), which is from modules (38-1, 38-2, 38-3) of different shapes and sizes depending on the sewer manhole (10) to be restored. A device characterized by comprising:   Device according to claim 12, characterized in that the module is mounted on a drum (102) which is driven to rotate about a horizontal axis.   14. A device according to claim 13, characterized in that the drum (102) is movably supported on a fixed shaft (100).   15. A module according to any one of claims 12 to 14, characterized in that at least one of the modules (13-1) consists of a circular segment (118) which is radially displaceable to change the diameter. apparatus.   16. Device according to claim 15, characterized in that adjacent circular segments (118) are connected to each other by an arched bridging element (124).

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