幌延深地層研究計画 地下施設建設に関する基本計画の検討(平成14年度)

Feasibility study on construction of Horonobe URL

白戸 伸明; 大内 一利; 山崎 眞一

Shirato, Nobuaki; Ouchi, Kazutoshi; Yamazaki, Shinichi

本検討は,平成13年度の検討成果を踏まえ,選定された地区の地質環境条件および有力な施設形態(立坑3本案)を対象に,坑道内空断面,空洞安定性評価,防災対策の検討,施工・仮設備計画,建設工程・工事費の検討等を実施するものである。

The Horonobe underground Research Laboratory (URL) programme hosted by sedimentary rocks is aimed to obtain deep geological characteristics of sedimentary rock mass and to confirm the applicability of the investigation methods for the geological environment and the engineering technology for the geological disposal described in the H12 report. In addition, the URL is aimed to have public people experience a deep geological environment in order to understand a deep geological disposal of HLW. Based on the results of the report in H13 the followings are carried out : (i)design of the section of the drifts and shafts (ii)stability analysis of the drifts and shafts considering the anisotropy of initial stress (iii)drawing of the fundamental plan (iv)refuge planning of the URL based on the estimation of gas flow (v)research planning of the second and the third stage of the URL (vi)study on construction method of the drifts and shafts (vii)planning of the facilities during construction and operation (viii)construction schedule analysis and cost estimation of the URL (ix)planning of the facility and guidance of visitors (x)closing planning of the URL This work was re-edited from the results performed by Taisei Corporation, 0bayashi Corporation, Kajima Corporation and Shimizu Corporation under contract with JNC; "Feasibility study on construction of Horonobe URL (JNC TJ1400 2002-003)".