TUNNELING SYSTEM PULLS INSTEAD OF PUSHING LARGE DIAMETER STEEL PIPE

IN A MAJOR DEPARTURE FROM CONVENTIONAL TUNNEL DRIVING IN A MAJOR DEPARTURE FROM CONVENTIONAL TUNNEL DRIVING METHODS, A JAPANESE CONTRACTOR HAS SUCCESSFULLY USED A U.S.-DEVELOPED JACKING SYSTEM TO PULL SOME 200 FT OF 96-IN DIAM STEEL CASING FOR A SEWER LINE THROUGH THE SATURATED SUBSOIL OF A CREEK WITHOUT FIRST COFFERDAMMING, DEWATERING, OR GROUTING THE SITE. WORKING SOME 25 FT BELOW WATER LEVEL FROM TWO SHAFTS SUNK THROUGH THE CREEK BED UPSTREAM AND DOWNSTREAM OF THE JOB, THE CONTRACTOR PULLED 100- AND 112-FT LENGTHS OF THE PIPE IN 20-FT INCREMENTS, WELDING ADDITIONAL STEEL PIPE TO THE TAIL END OF EACH PRECEDING LENGTH AS IT WAS PULLED THROUGH THE SOIL. AFTER THE STEEL CASINGS WERE IN PLACE, CREWS MUCKED OUT THE SOIL AND REINFORCED THE PIPE WITH 4-IN I-BEAMS AT 5 FT C-C. THEY THEN PULLED CONVENTIONAL REINFORCED CONCRETE PIPE THROUGH THE CASING TO COMPLETE THE SEWER INSTALLATION. /CME/

• Supplemental Notes:
  • Vol 53, No 3, PP 96-100, 12PHOT
• Authors:
  • Wakabayashi, J
• Publication Date: 1971-3

Media Info

• Serial:
  • Construction Methods and Equipment
  • Publisher: McGraw-Hill, Incorporated

Subject/Index Terms

• TRT Terms: Fine grained soils; Jacks (Mechanical equipment); Saturated soils; Sewers; Steel pipe; Tunneling
• Uncontrolled Terms: Jacking
• Subject Areas: Bridges and other structures; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00219426
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 18 1971 12:00AM