EGB373-TUT 06-Week 07- Consolidation Settlement in soils-Questions

Queensland University of Technology QUT EGB373: Geotechnical Engineering Appendix A: Uniformly loaded circular area

Queensland University of Technology QUT EGB373: Geotechnical Engineering Compression indices ( Cc and Cr ) Compression index, C c Recompression (swell) index, C r Coefficient of volume compressibility (m v )          = − − = ' ' log ' log ' log 1 2 1 2 2 1     e e e C c         − − + = ' ' 1 1 0 1 1 0 0   e e e m v          = − − = ' ' log ' log ' log 1 2 1 2 2 1     e e e C r         − − = ' ' 1 0 1 1 0 0   H H H m v or Civil Engineering - Texas Tech University 10 1 100 Effective stress,  ’ 1000 C c C r C r C c – Compression index C r – Recompression Or swell index

Queensland University of Technology QUT EGB373: Geotechnical Engineering ratio void imum e ratio void imum e soil of weight unit bouyant soil of weight unit saturated g soil of weight unit saturation of ree S content water w water of density solids of density gravity specific G soil of density water of density density dry density bulk M M mass total M water of mass M solids of mass M V V volume total V V V voids of volume V water of volume V air of volume V solids of volume V porosity n ratio void e sat s s w d w s w s v s w a v w a s min max ' deg min max = = = =  = = = = = = = = = = + = = = = + = = + = = = = = = =         s v V V e = V V n v = V V A a = w s w s w s s s V M G      = = = s w M M w = v w V V S = s r s r wG eS e wG S =  = V M =  V M s d =  s s s V M =  ) 1 ( w V M d + = =   w s e w G   + + = 1 ) 1 ( w r s e eS G   + + = 1 w sat    − = ' w s w w s e G e e G     + − = − + + = 1 1 1 ' 100 min max max  − − = = e e e e D I r D