Technical Papers

The following couple of articles written by Dr. Bengt H. Fellenius are related to the UniSoft programs.  Once downloaded, they can be viewed and printed using Adobe Acrobat Reader 5.0.  Acrobat Reader 5.0 can be downloaded for free from www.adobe.com.  Please note that several additional articles related to foundation engineering can be obtained from the personal web site of Dr. Fellenius: www.Fellenius.net

• 206 Dragload-Downdrag Discussion on Poulus - 24 KB
  Asian Journal Discussion on the design for dragload and downdrag (settlement) on piles with recommendation summary.
   
• 242 Residual Load Analysis - 310 KB
  A two-part article published in Geotechnical News Magazine.  The first part presents aspects of evaluation of strain-gages in instrumented piles with notes on Shift-of-No-Load-Reading and influence of Residual Loads.  The second part describes in detail and with examples how analyze the test data and detrmine the magnitude and distribution of residual load and true resistance.
   
• 234 Downdrag Discussion - 131 KB
  Asian Journal Discussion on the analysis of dragload and downdrag on piles and comparison of two approaches to the calculation of downdrag (settlement).
   
• 229 Compressibilitv&ModulusNumber.zip - 102 KB
  Determining compressibility parameters (C-c, CR, and Janbu Modulus Number, m) from oedometer tests. An EXCEL spreadsheet template that is particularly useful to Users of the UniPile and UniSettle programs.
   
• 202 Soil Profile from CPT - 631 KB
  Soil profile interpreted from CPTu data. A paper presenting soil profiling methods using the Cone Penetrometer, CPT and CPTu.
   
• 211 Dragload-Downdrag-Settlement - 881 KB
  The basics of the Fellenius Unified Pile Design of Capacity, Negative Skin Friction (Dragload and Downdrag), and Settlement. The approach is applied to a case study involving 100 ft to 190 ft long piles and is also a demonstration of the use of UniPile in an engineering project. Paper presented to a New York ASCE seminar in April 1998. The paper quotes several important case histories from the literature.
   
• 201 Pile Capacity from CPT - 1,300 KB
  The cone penetrometer test, CPT and CPTu, and its use for determining pile capacity. Several methods employed in current engineering practice are discussed, compared, and applied to a series of case histories. Amongst them, a new method proposed by A. Eslami and B.H. Fellenius. Canadian Geotechnical Journal article.