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SUMMARY:'URUP'\, Ultra Rapid Under Pass\, An innovative shield tunnelling 
 technology - Akihiro Nishimori\, Senior Tunnel Engineer\, Obayashi\, Japan
DTSTART:20121019T123000Z
DTEND:20121019T140000Z
UID:TALK39742@talks.cam.ac.uk
CONTACT:Anama Lowday
DESCRIPTION:'URUP' tunnelling\, developed by OBAYASHI in Japan\,  is an in
 novative shaft-less shield technology. The TBM is launched/arrives at grou
 nd level and drives under shallow cover without ground treatment. The resu
 lt  is significant cost savings\, reduced construction time and reduced en
 vironmental impact. \nThe incentive for the development of this new tunnel
 ling concept was the need for tunnel construction in congested areas\, cha
 llenging ground conditions and stringent physical and environmental constr
 aints. \nThe critical issues in 'URUP' technology are mainly tunnel face s
 tability and ground movement control. Innovative methods are used that  ha
 ve been developed by OBAYASHI through extensive technical research and dev
 elopment.  \nThe new concept was proven through a verification project and
  adopted by several projects in Japan\, which have been successfully const
 ructed. These projects involved circular TBMs with diameters ranging from 
 2.1m up to 13.6m\, an oval shape open-face TBM as well as a rectangular TB
 M.  \nThe presentation will describe how the URUP concept was developed\, 
 mechanisms of ground control under shallow cover and review projects where
  it has been successfully used.\n
LOCATION:Engineering Department - Lecture Room 6
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