A NEW PROPOSAL OF EVALUATION SYSTEM FOR TUNNEL FACE BASED ON THE ANALYSIS OF THE OBSERVATION RECORDS

• NAKATA Masahiro

  JAPAN SOCIETY OF CIVIL ENGINEERS

• MITANI Koji

  JAPAN SOCIETY OF CIVIL ENGINEERS

• YAGI Hiroshi

  JAPAN SOCIETY OF CIVIL ENGINEERS

• NISHI Takuro

  JAPAN SOCIETY OF CIVIL ENGINEERS

• NISHIMURA Kazuo

  JAPAN SOCIETY OF CIVIL ENGINEERS

• NAKAGAWA Koji

  JAPAN SOCIETY OF CIVIL ENGINEERS

Bibliographic Information

Other Title

• 観察記録の分析に基づく新しいトンネル切羽評価システムの提案
• カンサツ キロク ノ ブンセキ ニ モトヅク アタラシイ トンネル キリハ ヒョウカ システム ノ テイアン

Abstract

This paper proposes a new evaluation system for the condition of rock mass at a tunnel face as follows: 1) the condition of rock mass is evaluated from the strength of rock mass and the condition of ground water and stress, 2) the strength of rock mass is scored by a weighted mean of the rank which corresponds to the rock strength, degree of weathering, and frequency and openness of fractures, 3) the score is adjusted by the rank which corresponds to the ground water inflow and that calculated by the ratio of strength and vertical load of the rock mass. This new system is found to be more effective than the current appraising method for the support determinations.

Journal

• Doboku Gakkai Ronbunshu

  Doboku Gakkai Ronbunshu 1999 (623), 131-141, 1999-06-20

  Japan Society of Civil Engineers

Keywords

• tunnel face
• geological obsevations
• rock clasification
• support determinations
• quantification method

Details

• CRID: 1390282680285461120
• NII Article ID: 10002530456
• NII Article ID: 10010460875
• NII Book ID: AN10014020
• DOI: 10.2208/jscej.1999.623_131
• ISSN: 18827187
• ISSN: 02897806
• NDL BIB ID: 4787527
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4787527
• Web Site: https://www.jstage.jst.go.jp/article/jscej1984/1999/623/1999_623_131/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed