Effective parameters mean how much the soil skeleton can take irrespective of the water present in pore. Cohesion of a soil decreases as the moisture content increases. (in terms of effective stresses) ’ f c' 'tan ' ’ c’ Effective cohesion Effective friction angle f ’ ' u u = pore water pressure 14. Excel App. However, the nature of the vibratory condition may affect the results. 8 the maximum shear strength is about 2700, 1470, 740, 170 and 166 kPa for GC, GW-GC, GM, GW-GM and GW soils respectively. Effective cohesion of fine grained soil is defined on the basis of the standard CSN 73 1001 for different states of consistency and degree of saturation. Cohesion is derived in fine grained soils from the water films which bind together the individual particles in the soil mass. When added to soils, including those with sandy content, water plays a vital role in soil cohesion because of its surface tension. Cohesion of soils is the internal molecular attraction which resists the rupture or shear of a material. Download : Download full-size image