Osamu Igawa and Hiroshi Kouchiwa and Yuji Ito, Sewer Culvert Installation Method to Accommodate Underground Construction in an Urban Area with Narrow Streets (The Development of Shield Switching Type Micro-Tunneling Method and the Introduction of Construction Examples). journal = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology. January 2014, vol. 85(1). 1 - 6 [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/9997043.