Quality assessment of cutoff walls for reliability improvement of containment techniques

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760379
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geotechnical engineering
• Research Institution: Kyoto University
• Principal Investigator: TAKAI Atsushi 京都大学, 地球環境学堂, 助教 (30598347)
• Co-Investigator(Renkei-kenkyūsha): KATSUMI Takeshi 京都大学, 地球環境学堂, 教授 (60233764) ; INUI Toru 京都大学, 地球環境学堂, 准教授 (90324706)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 土壌地下水汚染 / 封じ込め / ソイルベントナイト / 電気式静的コーン貫入試験 / 自己修復性 / 透水試験 / 品質保証・品質管理

Outline of Final Research Achievements

This study focuses on soil-bentonite which is one of the most common barrier materials, and consists of bentonite and in-situ soil. Various laboratory tests were conducted from the viewpoint of: 1) on-site quality assessment, and 2) self-sealing capability against hydraulic defects. The experimental results indicate that the piezocone test, which is widely applied on site investigations, can detect the hydraulic defects caused by less bentonte amount with a spatial continuity. It was also verified that the soil-bentonite can display self-sealing capability and recover its hydraulic barrier performance when the specimen has an intentional defect due to the combined effects of its deformability and the reswelling of bentonite.

Free Research Field

地盤環境工学