2005.4-2006.3 Yearbook of NILIM
Research Summary


Road Department

Reference Number Y050408
Title Survey of Technical Standards and Ordering Methods for Mountain Tunnels in Foreign Countries
Start-End Date 2005.4-2006.3
Division Bridge and Structures division
Author Head, Takashi TAMAKOSHI
Senior Researcher, Kozaburo HORIUCHI
Senior Researcher, Hiroshi KOBAYASHI
Researcher, Mari ISHIO
Summary The purpose of the survey is to clarify concepts of foreign performance standards and ordering methods by investigating design standards and maintenance standards in foreign countries, and in addition, to reflect these in concepts of the ordering and maintenance of tunnel structures in Japan by surveying the present state of maintenance