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[III-95] Measurement of dynamic response of ground under roadbed concrete in mountain tunnel

〇Koichiro Mizuno¹, Yoshimi Kose¹, Masaki Kamiyama¹, Kozo Abe¹ (1.East Japan Railway Company)

Keywords:mountain tunnels, ground properties, dynamic response, pore water pressure, roadbed, railway

This report outlines dynamic response of ground under roadbed concrete in mountain tunnel.
Authors measured dynamic response such as pore water pressure under railway roadbed and atmospheric pressure, to evaluate the acting force to ground beneath the roadbed. Authors confirmed that dynamic pore water pressure acted on ground under roadbed concrete in response to live train load. Moreover, the measuring results of pore water pressure showed a unified response to several axles in a short time.