Tunnelling through squeezing rock in two large fault zones of the Enasan Tunnel II |
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| Authors: | Fuminori Kimura Nobuyuki Okabayashi Toshikazu Kawamoto |
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| Institution: | (1) Japan Highway Public Corporation, Japan;(2) Kajima Corporation, Japan;(3) Nagoya University, Nagoya, Japan |
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| Abstract: | Summary In spite of the high content of clay in the rock, blasting technique had to be adopted for excavation because the hydrothermally altered clay was interbedded in the hard rock. Problems with groundwater did not arise owing to the dewatering effect of the pilot tunnel. |
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