Measurement plan and observational construction program on shaft excavation at the Horonobe Underground Research Laboratory Project

Morioka, Hiroshi; Yamaguchi, Takehiro; Funaki, Hironori ; Orukawa, Go

JAEA is carrying out phased investigation in Horonobe. This investigation, named as "Horonobe Underground Research Laboratory Project" (Horonobe URL Project) targeting sedimentary formations, is intended to confirm the reliability of technologies on geological disposal of High-Level Radioactive Waste (HLW) by applying them into in-situ geological environment. On the "Development of engineering techniques for use in the deep underground environment" in Phase 1 of the Horonobe URL project, based on the various type of data acquired on investigations from the surface, basic design of underground facilities in advance was carried out. This report summarizes the measurement plan during construction of the underground facility based on the design in advance and the observational construction program for feedback measurements data into design and construction on subsequent steps. This report also describes about design and construction management program for contractor of underground facilities. The measurement plan described in this document is applied to measurements in the underground facilities for validation of the geological environmental model. Then, it will be verified the validity by application into actual construction and will be systematized with modification when necessary.