シールドトンネル (1)

[VI-162] Construction performance and troubleshooting of Tunnel construction by Mud pressure shield tunneling method in gravel ground with boulders.

*萩原 奈々¹、倉田 学¹、児玉 ひと美¹ (1. 佐藤工業)

Keywords:Mud pressure shield technique , A hard gravel ground that boulders

Haramachi Tobu Main Drainage Tunnel is constructed by mud pressure shield tunneling method such as diameter 2000mm, Length 1939m, and avarage overburden cover is 30m .The high liquidity management of its stable plastic flow of excavated earth removal at this Mud Pressure Tunneling Method is required because of gravel ground with boulders and high underground water pressure.
This description reports the basic tunnel construction plan by Mud pressure shield tunneling method and troubleshooting under the gravel ground with boulders and high underground water pressure condition.