EXPERIMENTAL STUDY ON THE SHAPE AND THE QUALITY OF THE BOTTOM CONCRETE IN CAST-IN-PLACE CONCRETE PILES

• ISHIGURO Kazuhiro

  Research Center, Ando Corporation

• TAMURA Masahito

  Building Research Institution

• KUBOTA Hirotoshi

  Nippon Institute of Technology

• KAWAMURA Masashi

  College of Industrial Technology, Nihon Univ.

• NEMOTO Hisashi

  Research Center, Ando Corporation

• AOKI Kenzo

  Japan Foundations Engineering Association

• FUJII Mamoru

  Dept. of Architecture and Building Eng., Tokai University

• WATANABE Kazuhiro

  Urban Development Corporation

• KUWABARA Fumio

  Nippon Institute of Technology

• SUGIMURA Yoshihiro

  Dept. of Architecture and Building Science, Graduate School of Engineering, Tohoku Univ.

Bibliographic Information

Other Title

• 場所打ちコンクリート杭の孔底付近の性状に関する実験的研究
• バショウチ コンクリート クイ ノ コウテイ フキン ノ セイジョウ ニ カンスル ジッケンテキ ケンキュウ

Abstract

This paper reveals several factors influencing the shape and the quality of the bottom concrete in cast-in-place concrete piles by model tests. A steel cylinder filled with a slurry was used to model a borehole where sediment so called "slime" settles on the bottom of the cylinder. Concrete placing follows by a tremie as practical manner. Through the experiment following conclusions were obtained, l) The shape of the concrete at pile bottom is deeply related to the soil type and stiffness of the sediment. 2) The effect of the thickness of the sediment on the compressive strength of the concrete at pile bottom is very small. 3) The stiffness of the sediment becomes small in the cases when the viscosity of the slurry is high. 4) The increasing stiffness of the sediment with depth is obtained by a sediment penetration test.

Journal

• Journal of Structural and Construction Engineering (Transactions of AIJ)

  Journal of Structural and Construction Engineering (Transactions of AIJ) 66 (545), 95-102, 2001

  Architectural Institute of Japan

Keywords

• cast-in-place concrete pile
• slime
• slurry
• placing concrete
• concrete behavior

Details

• CRID: 1390001205636579456
• NII Article ID: 110004304881
• NII Book ID: AN10438559
• DOI: 10.3130/aijs.66.95_4
• ISSN: 18818153
• ISSN: 13404202
• NDL BIB ID: 5848056
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5848056
• Web Site: https://www.jstage.jst.go.jp/article/aijs/66/545/66_KJ00004102355/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed