Careful planning and execution of tunneling procedures kept surface settlement over the tunnels below a magnitude of .05 feet, allowing tunneling adjacent and under high rise buildings without large expenditures for building protection by under-pinning or chemical grouting. The strict requirments of the adopted tunneling procedures were responsible for many delays, reducing tunnel system utilization to 55%. When shields or tunneling machines are to be used for several headings or have to be transferred through subway station construction, provisions for easy assembly should be incorporated into the basic design concept of the equipment. Descriptions are included of soil and groundwater conditions, tunneling equipment and methods, lining, settlement and underpinning.

Media Info

  • Pagination: p. 1213-32
  • Serial:
    • Volume: 2

Subject/Index Terms

Filing Info

  • Accession Number: 00129110
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: Proc Paper
  • Files: TRIS
  • Created Date: Feb 19 1981 12:00AM