STUDY ON POTENTIAL AREA OF CHLORIDE INDUCED DETERIORATION FOR SUBWAY CUT AND COVER TUNNEL

地下鉄箱型トンネルの塩害範囲に関する研究

In this study, the area of chloride damage in the cut and cover tunnel was investigated and numerical simulation was carried out with chloride diffusion analysis coupled with ground water. It had been understood that chloride damage was main problem in maintenance of subway tunnels have been indicated by last results of the investigation and the area of chloride damage occurs at the limit part nearby chloride water leakage. First, the chloride density of leakage was measured. As the results, it is found that the wide of chloride leakage was about 50m from the edge of tidal rivers. Second, numerical simulation is carried out to study time dependence of chloride movement. The result of simulation was good agreement with the insute measurement.　地下鉄トンネルの経年劣化の主な原因の一つである塩害について，東京地下鉄では躯体調査と対策工の検討を進めてきた．最近のこの調査結果から，塩害は塩化物を含む漏水箇所の近傍で局所的に生じる場合が多いことがわかっている．そこで，本研究では，塩化物の供給源となりうる河川等と塩分濃度の高い漏水箇所の位置関係を調査することにより，塩害が生じる可能性がある範囲を調べた．この結果，感潮河川の直下および河川端からおおよそ50mの範囲が要注意範囲であることがわかった．また，この結果が地下水中における塩化物の移流拡散の観点から妥当であるかどうか，地下密度流解析で検証した．

• Record URL:
  https://doi.org/10.2208/jscejte.70.I_75
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=STUDY+ON+POTENTIAL+AREA+OF+CHLORIDE+INDUCED+DETERIORATION+FOR+SUBWAY+CUT+AND+COVER+TUNNEL&author=Y.+MUTOU&author=S.+KONISHI&author=Y.+MOROHASHI&author=T.+NAKAYAMA&author=T.+USHIDA&publication_year=2015
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/21856575
• Authors:
  • MUTOU, Yoshihiko
  • KONISHI, Shinji
  • MOROHASHI, Yuji
  • NAKAYAMA, Takashi
  • USHIDA, Takashi
• Publication Date: 2015

Language

• English
• Japanese

Media Info

• Media Type: Web
• Pagination: pp I_75-I_82
• Serial:
  • Journal of Japan Society of Civil Engineers, Ser. F1 (Tunnel Engineering)
  • Volume: 70
  • Issue Number: 3
  • Publisher: Japan Society of Civil Engineers
  • ISSN: 2185-6575
  • Serial URL: https://www.jstage.jst.go.jp/browse/jscejte/-char/en

Subject/Index Terms

• TRT Terms: Chlorine; Cut and cover tunneling; Deterioration; Leakage; Simulation; Subways
• Subject Areas: Bridges and other structures; Construction; Public Transportation; Railroads; I54: Construction of Tunnels;

Filing Info

• Accession Number: 01564616
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: May 26 2015 4:12PM