[3A09-13] Material for Buffer, Filling and Backfill

[3A10] Evaluation of swelling deformation using buffer material swelling sensor on the full-scale in-situ engineered barrier system experiment

*Shun Kimura¹, Masashi Nakayama¹, Kimihiro Kinota¹, Kenji Tanai¹, Sumio Niunoya², Tomoyuki Shimura², Masaaki Fukaya² (1. JAEA, 2. OBAYASHI)

Keywords:Horonobe underground research laboratory, in-situ experiment, engineered barrier system, bentonite, swelling

Swelling deformation of buffer material has been measured using buffer material swelling sensor on the full-scale in-situ engineered barrier system experiment. The sensor consists of strain gauges and is installed between the buffer material and backfill. This study reports the calculation result of the swelling deformation from measured strain values.