" target="_blank" rel="nofollow"> " target="_blank" rel="nofollow">" target="_blank" rel="nofollow"> " target="_blank" rel="nofollow">rd 干的海绵重量/体积 => 干土单位重rm 湿的海绵重量/体积 => 湿土单位重rsat 全湿海绵重量/体积 => 饱和单位重r' (全湿海绵重量-水的浮力)/体积 => 浸水单位重扣掉水比重跟干土重rd不同,ex.干土单位重18KN/m^3饱和后20KN/m^3,浸水后因水的浮力使得浸水单位重 => 20-9.8=10.2KN/m^3rm不是泡在水里,只是湿湿的rsat也不是泡在水里,是所有孔隙都充满水