Method for reducing noise emissions on ground freezing construction sites

Abstract

The invention relates to a method for producing a contiguous frozen mass in an area of ground wherein at least one first cooling lance is introduced into the area of ground in which the contiguous frozen mass is to be generated, wherein a first fluid coolant is fed into the at least first cooling lance to support the formation of a contiguous frozen mass which surrounds the at least first cooling lance, the first coolant evaporates during formation of the contiguous frozen mass and the evaporated coolant is displaced out of the at least first cooling lance into a means for holding and/or dissipating the evaporated coolant. In this context, it is provided according to the invention that noise emissions generated during the creation of the contiguous frozen mass are minimised by a soundproofing means. The invention relates further to a device for performing the method according to the invention.

1 . Method for creating a contiguous frozen mass ( 1 ) in an area of ground ( 100 ), wherein at least one first cooling lance ( 10 ) is introduced into the area of ground ( 100 ) in which the contiguous frozen mass ( 1 ) is to be created, a first fluid coolant (T) is fed into the at least first cooling lance ( 10 ) to support the formation of a contiguous frozen mass ( 1 ) which surrounds the at least first cooling lance ( 10 ), the first coolant (T) evaporates during formation of the contiguous frozen mass ( 1 ) and the evaporated coolant (T′) is led out of the at least first cooling lance ( 10 ) in into a means ( 22 ,  24 ) for accommodating and/or dissipating the evaporated coolant (T′), particularly an exhaust manifold ( 22 ) and/or an outlet pipe ( 24 ), characterized in that
 noise emissions generated during the creation of the contiguous frozen mass ( 1 ) are minimised by a soundproofing means ( 30 ,  31 ,  32 ,  33 ,  34 ,  35 ,  36 ,  37 ). 
 
     
     
         2 . Method according to  claim 1 , characterized in that the soundproofing means is embodied as silencers ( 30 ) in the at least first cooling lance ( 10 ). 
     
     
         3 . Method according to  claim 1 , characterized in that the soundproofing means is embodied as silencers ( 31 ,  37 ) in the exhaust manifold ( 22 ) and/or in the outlet pipe ( 24 ). 
     
     
         4 . Method according to  claim 1 , characterized in that the at least first cooling lance ( 10 ) is connected to a coolant reservoir ( 20 ) via a first connection ( 21 ), and the soundproofing means is embodied as silencers ( 32 ) or an acoustic insulation tube ( 32 ) in the first connection ( 21 ). 
     
     
         5 . Method according to  claim 1 , characterized in that the exhaust manifold ( 22 ) or the outlet pipe ( 24 ) is connected to the at least first cooling lance ( 10 ) via a second connection ( 23 ), and the soundproofing means is embodied as silencers ( 33 ) or an acoustic insulation tube ( 33 ) in the second connection ( 23 ). 
     
     
         6 . Method according to  claim 1 , characterized in that the soundproofing comprises a containment installation ( 34 ) which encloses at least the exhaust manifold ( 22 ), the outlet pipe ( 24 ), the first connection ( 21 ), the second connection ( 23 ) and/or the aboveground region of the area of ground ( 100 ) into which the at least first cooling lance ( 10 ) is introduced, and the soundproofing means further comprises at least one amplifier ( 35 ) which is designed to minimise the noise emissions generated by counter-noise. 
     
     
         7 . Method according to  claim 6 , characterized in that the soundproofing means further comprises at least one microphone ( 36 ). 
     
     
         8 . Device for creating a contiguous frozen mass in an area of ground, including
 at least a first cooling lance ( 10 ), which is designed to introduce a fluid coolant (T) into an area of ground ( 100 ),   a coolant reservoir ( 20 ), which is designed to supply the fluid coolant (T), and   a means for accommodating and/or dissipating an evaporated coolant (T′), particularly an exhaust manifold ( 22 ), which is designed to accommodate the evaporated coolant (T′), or an outlet pipe ( 24 ) for leading the evaporated coolant (T′) away,   
       characterized in that 
       the device further includes a soundproofing means ( 30 ,  31 ,  32 ,  33 ,  34 ,  35 ,  36 ,  37 ) which is designed to minimise the noise emissions that are generated during creation of the contiguous frozen mass ( 1 ). 
     
     
         9 . Device according to  claim 8 , characterized in that the soundproofing means is embodied as silencers ( 30 ) in the at least first cooling lance ( 10 ). 
     
     
         10 . Device according to  claim 8 , characterized in that the soundproofing means is embodied as silencers ( 31 ,  37 ) in the exhaust manifold ( 22 ) or in the outlet pipe ( 24 ). 
     
     
         11 . Device according to  claim 8 , characterized in that the at least first cooling lance ( 10 ) is connected to the coolant reservoir ( 20 ) via a first connection ( 21 ), and the soundproofing means is embodied as silencers ( 32 ) or an acoustic insulation tube ( 32 ) in the first connection ( 21 ). 
     
     
         12 . Device according to  claim 8 , characterized in that the exhaust manifold ( 22 ) or the outlet pipe ( 24 ) is connected to the at least first cooling lance ( 10 ) via a second connection ( 23 ), and the soundproofing means is embodied as silencer ( 33 ) or an acoustic insulation tube ( 33 ) in the second Connection ( 23 ). 
     
     
         13 . Device according to  claim 8 , characterized in that the device comprises a containment installation ( 34 ) as soundproofing means, which encloses at least the exhaust manifold ( 22 ), the outlet pipe ( 24 ), the first connection ( 21 ), the second connection ( 23 ) and/or the aboveground region of the area of ground ( 100 ) into which the at least first cooling lance ( 10 ) is introduced, and the device further comprises at least one amplifier ( 35 ) as soundproofing means which is designed to minimise the noise emissions generated with counter-noise. 
     
     
         14 . Device according to  claim 13 , characterized in that the device further comprises at least one microphone ( 36 ).