SOFT-GROUND TUNNELLING. FAILURES AND DISPLACEMENTS

This volume contains the written versions of some of the contributions presented to the Specialty Session on Soft-Ground Tunneling during the 6 Panamerican Conference on Soil Mechanics and Foundation Engineering, held in Lima, Peru, December 1979. The papers are as follows: Geotechnical Problems in Soft-Ground Tunneling: An Introduction (Resendiz, D and Romo, MP); Engineering Contract, Site Investigation and Surface Movements in Tunnelling Works (Attewell, PB); Weathered-Rock Portion of the Wilson Tunnel, Honolulu (Peck, RB); Failures of Shafts and Tunnels in Soft Soils (Moreno, A and Schmitter, JJ); The Assessment of Tunnel Stability in Clay by Model Tests (Casarin, C and Mair, RJ); Tunneling under Compressed Air in Mexico City (Schmitter, JJ and Rendon, R); Ground Settlements from the Excavation of Tunnels in Soft Clay (Rodriguez, LB and Ruelas, SA); Settlements upon Soft-Ground Tunneling: Theoretical Solution (Resendiz, D and Romo, MP); Lost-Ground Subsidences in Two Shallow Tunnels (Soweres, GF); Stress Path Approach for a Tunnel Driven in Stiff Clay (Myrianthis, ML); Pressure-Displacement Relations in Two Systems of Tunnel Lining (Eisenstein, Z El-Nahhas, F and Thomson, S); Flow Patterns around Tunnels and Their Use in Evaluating Construction Problems (Fitzpatrick, L, Kulhawy, FH and O'Rourke, TD). (TRRL)