ABUTMENT STABILIZED WITH GROUND-ANCHORS

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

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0263788X
• Corporate Authors:

  Municipal Engineering Publications, Limited

  178-202 Portland Street
  London W1N 6NH,   England 
• Publication Date: 1969-1-31

Media Info

• Serial:
  • Municipal Engineering
  • Publisher: Municipal Engineering Publications, Limited
  • ISSN: 0263-788X

Subject/Index Terms

• TRT Terms: Anchor plates; Arches; Brick; Bridge abutments; Bridges; Cement grouts; Cracking; Epoxy resins; Maintenance; Tension; Tie rods
• Uncontrolled Terms: Anchors; Structural stability
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00218667
• Record Type: Publication
• Source Agency: Public Works
• Files: TRIS
• Created Date: Sep 28 1970 12:00AM