BEHAVIOR OF AN OVERPASS CARRIED ON FOOTINGS AND FRICTION PILES

A LONG OVERPASS STRUCTURE WITH 32 PIERS BETWEEN ABUTMENTS WAS FOUNDED ON STRIP FOOTING AND FRICTION PILE FOUNDATIONS IN A DEEP MARINE CLAY SUBSOIL OF FIRM CONSISTENCY. THE PILES WERE STEEL H-SECTIONS WHICH WERE PROVIDED AT THE CONSTRUCTION STAGE AT 6 LOCATIONS IN LIEU OF FOOTINGS BECAUSE OF UNFAVORABLE SOIL CONDITIONS EXPOSED DURING EXCAVATION. A LOAD TEST TO FAILURE ON A SINGLE PILE INDICATED THE PILE-SOIL ADHESION TO BE CONSIDERABLY LOWER THAN THE UNDRAINED SHEAR STRENGTH OF THE CLAY. POST-CONSTRUCTION OBSERVATIONS INDICATED THE SETTLEMENT OF THE PILE-SUPPORTED PIERS TO BE ABOUT 50% THAT OF THE ADJACENT FOOTING SUPPORTED PIERS. THE SETTLEMENTS OF BOTH TYPES OF FOUNDATIONS WERE SMALL AND WITHIN TOLERABLE LIMITS. THE DESIGN APPROACHES USED FOR PREDICTION OF FOOTING SETTLEMENT AND THE GROUP ACTION OF FRICTION PILES IN BEARING CAPACITY AND SETTLEMENT ARE PRESENTED. /CGRA/

• Supplemental Notes:
  • Vol 6, No 4, PP 369-382, 10 FIG, 1 TAB, 1 PHOT, 10 REF
• Authors:
  • Brzezinski, L S
• Publication Date: 0

Media Info

• Serial:
  • CANADIAN GEOTECHNICAL JOURNAL
  • Issue Number: 0
  • Publisher: National Research Council of Canada

Subject/Index Terms

• TRT Terms: Adhesion; Bearing capacity; Behavior; Clay; Failure; Footings; Friction piles; Load tests; Overpasses; Piers (Supports); Piers (Wharves); Settlement (Structures); Shear strength; Soils
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00230977
• Record Type: Publication
• Source Agency: CANADIAN GOOD ROADS ASSOCIATION
• Files: TRIS
• Created Date: Nov 23 1970 12:00AM