69_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

69_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 - X10...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
X10 o Using N'7o Bowles provides the following approximate C u (= qul2) and cj) values: Empirical values for tfJ, D" and unit weight of granular soils based on the SPT at about 6 m depth and nonnaUy consolidated [approximately, f/J = 28° + lSOD r (±2°» Description Very loose Loose Medium Dense Very dense Relative density D, 0 0.15 0.35 0.65 0.85 SPT N 70 : fine 1-2 3-6 7-15 1~30 1 medium 2-3 4-7 8-20 21-40 >40 coarse 3-6 5-9 10-25 2~5 >45 4>: 2~28 28-30 30-34 33-38 27-28 30-32 32-36 36-42 <50 33-40 40-50 'Y_. kNlm3 11-16· 14-18 17-20 17-22 20-23 • Excavated soil or material dumped from a truck has a unit weight of 1110 14 kN/m 3 . and must be quite dense to weigh much over 21 3 No existing soil has a D, = 0.00 nor a value of 1.00. Common ranges are from 0.3100.7. Consistency of saturated cohesive soils* Consistency N q.,kPa Remarks Very soft coo 0-2 <25 Squishes between fingers when squeezed u §~ Soft z ~ u 3-5 25-50 Very easily defonned by squeezing Medium ~9 50- 100 11 Stiff "is 10-16 100- 200 Hard to defonn by hand squeezing Very stiff l; 17-30 200- 400 Very hard to defonn by hand squeezing Hard .C; >30 >400 Nearly impossible to defonn by hand • Blow counts and OCR division are for a guidc-in clay KexceptiODS
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/10/2012 for the course CEG 4012 taught by Professor Staff during the Fall '08 term at University of Florida.

Ask a homework question - tutors are online