SEALING TUNNEL LININGS WITH PLASTICS

NEW TECHNIQUES FOR SEALING BOLT HOLES AND JOINTS BETWEEN TUNNEL LINING SEGMENTS ARE BEING TRIED ON LONDONS NEW VICTORIA LINE, TO PREVENT DAMAGE TO STATION DECORATION BY DAMPNESS. A RESIN SYSTEM WHICH CAN WITHSTAND WATER PRESSURES UP TO A 60 FT HEAD HAS BEEN DEVELOPED. AREAS TO BE SEALED ARE GRIT BLASTED, THE BOLTS ARE CAREFULLY TIGHTENED. THEN A RIGID PLASTIC FOAM IS CAST OVER THE HEADS. THE BOLTS CAN BE SEALED EITHER SEPARATELY OR IN GROUPS, DEPENDING ON THE PATTERN IN WHICH THEY OCCUR. IN LARGE AREAS GLASS-REINFORCED FIBERS ARE USED. NOT ONLY WILL THE NEW PLASTIC SEALING CURE PROBLEMS OF DAMPNESS, BUT THEY WILL ALSO SUPPORT MOSAICS OR OTHER DECORATIONS. /AUTHOR/

• Supplemental Notes:
  • Vol 203, No 5258, PP 1480
• Publication Date: 1967-1-27

Media Info

• Serial:
  • Engineering /UK/

Subject/Index Terms

• TRT Terms: Bolts; Glass fibers; Grits; Joints; Methodology; Plastic foams; Presplitting (Blasting); Resins; Sealing (Technology); Sealing compounds; Tunnel lining; Waterproofing
• Old TRIS Terms: Joint; Sealing
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216121
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 20 1994 12:00AM