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DH De土的三相组成比例指标换算公式名称符号三相比例表达式常用换算式常见的数值范围含水率(%)w =mwms100%S e r w = r = -1G rs d2060土粒比重GsG =sm 1 rs =V r rs wswG =ss esw黏性土:2.72 2.75 粉土:2.70 2.71 砂土:2.65 2.69密度(g/cm3)rr=mVr=r (1 +w)dr=G (1 +w) s1 +erw1.62.0干密度(g/cm3)rdr =dmVsr =dr1 +w=G rS w1 +e1.31.8饱和密度(g/cm3)rsatrsat=m +V rs v wVrsat=(G +e ) s1 +erw1.82.3有效密度(g/cm3)rr=m -V rs s wVr =r -r sat w(G -1) r r = s w1 +e0.81.3孔隙比孔隙率(%)饱和度(%)enSrn =S =re =VvVVwVvVvVs100%100%G rG (1 +w)e = s w-1 e = srrdd r n = =1 - d1 +e G rswwG wrS =s = dre nrwrw-120602060黏性土和粉土:0.40 1.20砂土:25450100e =e -i 0DHH0i(1 +e )0即, = (2015.1.5) H 1 +e0 0