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.

Media Info

  • Features: References;
  • Pagination: p. 1-19
  • Serial:

Subject/Index Terms

Filing Info

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