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Technologies
     ADECO-RS
     RS Method
     Extrusion Test
     Jet-Grouting
     Mechanical precutting and
     core-face reinforcement
     Using Fibre-Glass Structures
     Cellular Arch
Articificial ground
     overburdens
     Widening of tunnels
     without interrupting
     traffic
     Cellular Embankment
References
Publications
 
Stage 1: ground improvement and shaping of the excavation and placing of the shotcrete protection
 
Stage 2: backfill using stabilised and compacted ground
 
Stage 3: excavation and preliminary lining of the underground tunnel
 
Stage 4: casting of the final lining and final backfill with topsoil
 


 


The construction of artificial tunnels to cross lengths of a route in which there is insufficient overburden for bored tunnel advance inevitably involve deep incisions into the slopes to be crossed with consequent problems of safety and environmental impact.

Rocksoil S.p.A. researched and developed the use of special "artificial overburdens" of improved ground created over the crowns of tunnels before excavation. They can then be bore tunnel driven thereby by-passing all the problems connected with traditional methods of constructing artificial tunnels.


per ingrandire cliccare sull'immagine

This new method has been used for the construction of approximately 1.5 km of tunnel on the new Milan to Naples High Speed rail line. It was found extremely practical and safe, not to mention economical and environmentally sound.




  
   


Bags of lime ready to be mixed with the in situ soil to form artificial ground


The soil is mixed with lime


The tunnel face. The Borgo Rinzelli face while advancing under the artificial ground


The portal of the Borgo Rinzelli Tunnel with almost no overburden (new High Speed/High Capacity railway line between Bologna and Florence)


The Sadurano Tunnel face while advancing under the artificial ground (visible at top)


A moment during the creation of the artificial ground for the Sadurano Tunnel (new High Speed/High Capacity railway line between Bologna and Florence)

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