Study on design and construction method for the New Tomei–Meishin expressway tunnels |
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| Authors: | Katushi Miura Hiroshi Yagi Hiromichi Shiroma Kazuya Takekuni |
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| Affiliation: | a Head of Shizuoka Construction Bureau, Japan Highway Public Corporation (JH), Shizuoka-city, Shizuoka 420-0857, Japan;b Construction Department, Shizuoka Construction Bureau, JH, Shizuoka-city, Shizuoka 420-0857, Japan;c Tunnel Division, Road Research Department, Expressway Research Institute, JH, Machida-city, Tokyo 194-8650, Japan;d Road Engineering Section, Engineering Department, Head Office, JH, Chyoda-ku, Tokyo 100-8979, Japan |
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| Abstract: | The New Tomei–Meishin expressway has a high-speed highway facility with six lanes (three lanes for each direction) throughout its total length of 502 km. The expressway is planned to form a new transportation backbone for Japan in the 21st century by connecting between Tokyo and Kobe. This expressway plays a supplemental expressway of the existing Tomei and Meishin expressways. The tunnels on the New Tomei–Meishin expressway have a very large, flattened cross-section of approximately 190 m2 excavation area, while the excavation width is approximately 18 m. There is no previous example of such a huge cross-section in the world. Thus, there are various problems regarding the technical configuration and the support structure in terms of construction such as how to excavate a large group of tunnels safely and efficiently. This paper describes the study and investigation related to design and construction method for large cross-section tunnels located in various ground conditions. |
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| Keywords: | Large cross-section Flatted cross-section Support TBM Dust corrector system |
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