Manhole and a method for providing a manhole

Abstract

A manhole ( 40 ) for desert environments where temperatures can be very high and environmental conditions such as erosion exert different challenges on sewage infrastructure, the manhole including a steel pipe telescope ( 450 ) matched to two circular heat resistant sealing rings ( 460, 461 ) in a concrete cone ( 400 ). The concrete cone is attached to a concrete manhole ( 410 ) with a heat resistant seal ( 462 ). The position of the concrete cone is stabilised by a large concrete slab ( 470 ) at the bottom of the manhole. The cover ( 430 ) of the manhole rests on the steel pipe telescope ( 450 ), and when the ground level changes, the steel pipe telescope can simply be repositioned within the concrete cone to match the changed ground level. All concrete parts ( 400, 410, 470 ) can be casted on-site, which means that preferably both the construction and the maintenance of the manhole happen at the installation site.

1 . A manhole, comprising a telescope ( 450 ) and a cover ( 430 ), wherein the telescope is arranged to adjust the height of the manhole cover from the ground, characterized in that,
 said telescope ( 450 ) is a metal pipe within a concrete cone ( 400 ) with at least one seal ( 460 ,  461 ) arranged to seal the interface between the pipe and the concrete cone ( 400 ),   said concrete cone ( 400 ) is arranged to be attached to the manhole ( 410 ), and   said metal pipe telescope ( 450 ) is arranged to be moved within said concrete cone ( 400 ) to adjust the cover ( 430 ) position to ground level.   
     
     
         2 . A manhole as claimed in  claim 1 , characterized in that, two O-ring seals ( 460 ,  461 ) are arranged into the concrete cone steel pipe interface. 
     
     
         3 . A manhole as claimed in  claim 1 , characterized in that, a concrete slab ( 470 ) is arranged to be installed under the bottom of the manhole. 
     
     
         4 . A manhole as claimed in  claim 3 , characterized in that, the concrete slab ( 470 ) is arranged to have an area larger than the area of the bottom of the manhole. 
     
     
         5 . A manhole as claimed in  claim 1 , characterized in that, said metal pipe telescope ( 450 ) is a steel pipe. 
     
     
         6 . A manhole as claimed in  claim 1 , characterized in that, any or all of the following: concrete slab ( 470 ), concrete cone ( 400 ), and/or manhole  410  are arranged to be precasted in a concrete mill prior to installation. 
     
     
         7 . A manhole as claimed in  claim 1 , characterized in that, any or all of the following: concrete slab ( 470 ), concrete cone ( 400 ), and/or manhole ( 410 ) are arranged to be casted at the worksite prior to installation. 
     
     
         8 . A manhole as claimed in  claim 1 , characterized in that, a mechanical system ( 480 ) is arranged to move metal pipe telescope ( 450 ) by a user rotating at least one wheel or turning at least one lever in said mechanical system while maintaining the manhole ( 400 ) and the concrete cone ( 450 ) sealed. 
     
     
         9 . A manhole as claimed in  claim 1 , characterized in that, any or all of the following: concrete slab ( 470 ), concrete cone ( 400 ), and/or manhole ( 410 ) are arranged to be made from polymer concrete, concrete made with a mix of cement and polymer or normal cement concrete. 
     
     
         10 . A manhole as claimed in  claim 1 , characterized in that, said telescope ( 450 ) is arranged to be mechanically coupled to the surface material surrounding the manhole, and the position of the telescope within said concrete cone ( 400 ) is arranged to change with the sinking and/or rising of the surface material based on said mechanical coupling. 
     
     
         11 . A manhole as claimed in  claim 1 , characterized in that, the manhole is wider in diameter than one meter or lower in height than 1.2 meters, and
 the concrete cone ( 400 ) is removed and the metal pipe telescope is attached directly to the manhole ( 610 ).   
     
     
         12 . A method of constructing a manhole, the manhole comprising a telescope ( 450 ) and a cover ( 430 ), wherein the telescope adjusts the height of the manhole cover from the ground, characterized by the following steps,
 said telescope ( 450 ) is a metal pipe and is placed within a concrete cone ( 400 ) with at least one seal ( 460 ,  461 ) sealing the interface between the pipe and the concrete cone ( 400 ),   said concrete cone ( 400 ) is attached to the manhole ( 410 ), and   said metal pipe telescope ( 450 ) is moved within said concrete cone ( 400 ) to adjust the cover ( 430 ) position to ground level.   
     
     
         13 . A method as claimed in  claim 12 , characterized in that, two O-ring seals ( 460 ,  461 ) are placed into the concrete cone steel pipe interface. 
     
     
         14 . A method as claimed in  claim 12 , characterized in that, a concrete slab ( 470 ) is installed under the bottom of the manhole. 
     
     
         15 . A method as claimed in  claim 12 , characterized in that, the concrete slab ( 470 ) has an area larger than the area of the bottom of the manhole. 
     
     
         16 . A method as claimed in  claim 12 , characterized in that, said metal pipe telescope ( 450 ) is a steel pipe. 
     
     
         17 . A method as claimed in  claim 12 , characterized in that, any or all of the following: concrete slab ( 470 ), concrete cone ( 400 ), and/or manhole  410  are precasted in a concrete mill prior to installation. 
     
     
         18 . A method as claimed in  claim 12 , characterized in that, any or all of the following: concrete slab ( 470 ), concrete cone ( 400 ), and/or manhole ( 410 ) are casted at the worksite prior to installation. 
     
     
         19 . A method as claimed in  claim 12 , characterized in that, a mechanical system ( 480 ) moves metal pipe telescope ( 450 ) by a user rotating at least one wheel or turning at least one lever in said mechanical system while maintaining the manhole ( 410 ) and the concrete cone ( 400 ) sealed. 
     
     
         20 . A method as claimed in  claim 12 , characterized in that, any or all of the following: concrete slab ( 470 ), concrete cone ( 400 ), and/or manhole ( 410 ) are made from polymer concrete, concrete made with a mix of cement and polymer or normal cement concrete. 
     
     
         21 . A method as claimed in  claim 12 , characterized in that, said telescope ( 450 ) is mechanically coupled to the surface material surrounding the manhole, and the position of the telescope within said concrete cone ( 400 ) is arranged to change with the sinking and/or rising of the surface material based on said mechanical coupling. 
     
     
         22 . A method as claimed in  claim 12 , characterized in that, the manhole is wider in diameter than one meter or lower in height than 1.2 meters, and
 the concrete cone ( 400 ) is removed and the metal pipe telescope is attached directly to the manhole ( 610 ).