MEASURED BEHAVIOR OF BRACED WALL IN VERY SOFT CLAY

During 1977-1978 a series of 25 ft wide by 30 ft deep sewer culverts were built in the Islais Creek Basin near San Francisco Bay. The sheetpile wall supported excavations for the culverts were made through rubble fill into a soft clay whose depth and strength varied along the culvert alinement. In the area of the thickest clay deposit, the soil was the weakest, apparently because the consolidation pressures were very low. There were a number of possible reasons for this situation, the most likely being the presence of artesian pressures. In the weakest clay, where basal heave factors of safety of the excavation were at or possibly below one, measured lateral movements during excavation were large, in sharp contrast to the smaller movements in adjacent areas where the clay was slightly stronger.

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• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Clough, G W
  • Reed, M W
• Publication Date: 1984-1

Media Info

• Features: References;
• Pagination: p. 1-19
• Serial:
  • Journal of Geotechnical Engineering
  • Volume: 110
  • Issue Number: 1
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9410

Subject/Index Terms

• TRT Terms: Clay; Consolidations; Construction; Culverts; Excavations; Measurement; Pressure; Retaining walls; Safety factors; Sewers; Sheet pile walls; Sheet piling; Soft clays
• Old TRIS Terms: Lateral movement; Trench shoring
• Subject Areas: Bridges and other structures; Construction; Design; Geotechnology; Highways; Safety and Human Factors; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00385837
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jun 28 1984 12:00AM