HYDRAULIC PROPERTIES OF UNLINED ROCK TUNNELS

THE FACTORS INFLUENCING THE HYDRAULIC CHARACTERISTICS OF SMALL UNLINED TUNNEL CROSS-SECTIONS ARE PRESENTED. INVESTIGATIONS WERE CARRIED OUT IN ROCK TUNNELS CONSTRUCTED BY THE HELSINKI CITY WATERWORKS FOR CONVEYING RAW WATER. THE LENGTH OF THE SILVOLA RESERVOIR ENTRANCE TUNNEL IS 4.5 SQ M. THE LENGTH OF THE SILVOLA-VANHAKAUPUNKI RAW WATER TUNNEL IS 7.6 KM AND ITS THEORETICAL CROSS SECTION 6 SQ M. VERTICAL SHAFTS DIVIDED BOTH OF THE TUNNELS INTO THREE PARTS, IN ALL OF WHICH CROSS-SECTIONAL MEASUREMENTS FOR DIFFERENT DISCHARGES WERE CARRIED OUT WITH MEASURING WEIRS AND SIMENS VENTURI METERS. ALL THREE TUNNELS WERE EXCAVATED BY THE SO-CALLED SWEDISH METHOD IN THE MOST USUAL TYPE OF ROCK IN FINLAND, COMPOSED MOSTLY OF GRANITE AND GNEISS. /ASCE/

• Supplemental Notes:
  • Vol 95, No HY 4, PROC PAPER 6672, PP 1181-1209, 19 FIG, 9
• Authors:
  • Priha, S
• Publication Date: 1969-7

Media Info

• Serial:
  • Journal of the Hydraulics Division
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Excavation and tunneling; Flow; Hydraulics; Rocks; Streamflow; Tunnel lining; Water; Water tunnels
• Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204238
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 29 1994 12:00AM