System for renovating a sewer manhole

Abstract

A method for renovating a sewer manhole includes: a. pulling an inflatable film sleeve onto a mold corresponding to the sewer manhole profile; b. wrapping and/or laying an extensible textile strip of the film sleeve onto the mold, a non-extensible high-tensile-strength longitudinal strip also being laid in an axial direction between the strips; c. attaching a protective sheath enclosing the liner manufactured in this manner; d. pulling the liner off the mold that has been reduced in a radial direction; e. inserting the liner into a sewer manhole to be renovated, and introducing a pressure-tight bag into the inner film sleeve of the liner; f. sealing the liner at the upper end and inflating until it abuts against the manhole wall; g. curing the resin-impregnated liner. A variable mold, which is assembled from modules of different shapes and sizes corresponding to the sewer manhole, serves for manufacture of the liner.

The invention claimed is: 
     
         1 . A method for renovating a sewer manhole comprising the following steps:
 a. pulling an inflatable film sleeve ( 40 ) onto a mold ( 38 ) corresponding to a sewer manhole profile,   b. wrapping 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 extensible textile and non-extensible strips ( 46 ,  46 ′),   c. attaching a protective sheath ( 52 ) enclosing a 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 film sleeve ( 40 ) disposed inside of the liner ( 50 ),   f. sealing the liner ( 50 ) at an upper end and inflating until the liner abuts against a manhole wall ( 34 ), and   g. curing the liner ( 50 ) impregnated with resin.   
     
     
         2 . The method according to  claim 1 , wherein a metal band ( 55 ) is applied in a longitudinal direction onto an outer side of the protective sheath ( 52 ). 
     
     
         3 . The method according to  claim 1 , wherein upon manufacture of a 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  claim 1 , wherein, in order to manufacture the protective sheath ( 52 ), wide webs of a thicker film made of a UV-opaque material, which overlap at their edges, are laid in a circumferential direction onto the liner ( 50 ). 
     
     
         5 . The method according to  claim 3 , wherein the textile strip ( 46 ,  46 ′) and cut pieces ( 98 ) are made of a glass-fiber material. 
     
     
         6 . The method according to  claim 1 , wherein the liner ( 50 ) is produced in a position rotating around a horizontal axis. 
     
     
         7 . The method according to  claim 3 , wherein the textile strip ( 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  claim 1 , 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 along a center axis. 
     
     
         9 . The method according to  claim 1 , wherein for fastening 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  claim 1 , wherein a sealing ring ( 60 ) is inserted between a lower end of the liner ( 50 ) and the manhole wall ( 34 ). 
     
     
         11 . A liner ( 50 ) for sewer manholes ( 12 ) to be renovated, manufactured using a method according to  claim 1 . 
     
     
         12 . An apparatus for manufacturing a liner ( 50 ) according to  claim 1 , wherein the apparatus 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 a 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  claim 12 , wherein at least one of the modules ( 13 - 1 ) is assembled from circle segments ( 118 ) that are radially displaceable in order to modify diameter. 
     
     
         16 . The apparatus according to  claim 15 , wherein adjacent circle segments ( 118 ) are connected to one another by arc-shaped bridging elements ( 124 ).