Deposits of a volcanic soil, known locally as "Shirasu", are widely distributed in southern Kyushu, Japan. The unique physical properties of Shirasu affect its mechanical properties and lead to geotechnical difficulties. The purpose of this study was to examine the applicability of the Cone Penetration Test with pore pressure measurement (CPTU) in Shirasu deposits. CPTU data for Shirasu deposits was compared with data obtained from conventional tests including a vertical loading test on a bored cast-in-place pile and the Standard Penetration Test (SPT). The main conclusions are as follows: (1) Shirasu manifests a SPT-CPTU relation that differs from such relations for other soils; (2) soil classification charts by Robertson (1990) are applicable even for Shirasu deposits; (3) a simple method using CPTU data is proposed for estimating the mechanical behavior of a pile, and the validity of the method is proved for Shirasu deposits. (A) For the covering abstract see IRRD 883023.


  • English

Media Info

  • Features: References;
  • Pagination: p. 452-63

Subject/Index Terms

Filing Info

  • Accession Number: 00729282
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2513-0
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM