1차원 압밀점토의 응력해방에 의한 수직변형량과 현장재현 압밀시험에 관한 연구 = A Study on Reappeared Consolidation Test of In-situ Property and Vertical Deformation of Sample Due to Stress Release

다국어 초록 (Multilingual Abstract)

When a saturated clay is sampled in an undisturbed manner from a bore hole, the sample extends vertically and shrinks horizontally under undrained conditions due to stress release. The conventional consolidation test specimen is trimmed from the expanded sample so that its diameter is equal to the inner diameter of the consolidation test ring, and this test procedure does not reproduce the actual consolidation behavior. The measurement of sample extension was conducted by means of overcoring method showed that the extension strains were 1 to 2%. To simulate the in-situ consolidation behavior, we proposed the consolidation test method that uses a specimen with a slightly smaller diameter than the inside diameter of consolidometer so that the specimen expands laterally to the inside of the ring.

참고문헌 (Reference)

1 김재영, "현장에서 채취한 불교란 점토시료의 샘플링후 시료변형을 고려한 압밀시험에 대한 연구" 대한토목학회 25 (25): 9-14, 2005

2 이형주, "준설 점토 지반에서의 증발 이론 개발" 한국지반공학회 19 (19): 55-64, 2003

3 建築基礎構造設計指針, "日本建築學會"

4 地盤調査, "土質試驗結果の解釋と適用例" 地盤工學會 229-233, 1998

5 高田直俊, "サンプリング後の応力解放による粘土の変形の計測" 966-967, 1993

6 金宰永, "サンプリングによる応力解放を考慮した圧密試験" 680/III-55 : 263-268, 2001

7 John H.Schmertmann, "“The undisturbed consolidation behavior of clay”, Paper No. 2775" 120 : 1208-1216, 1953

8 Takada, N, "Consolidation test considering sample deformation due to stress release" 29-34, 2004