filtration coefficient造句

• Through comparative analysis to the test data of tow sampling methods in drilling hole and sampling method in shaft , it was found out by the author that the drilling sampling method has obvious disturbance and depression to the soil sample , which caused the soil sample ' s dry density to be increased , porosity ratio to be decreased , filtration coefficient to be decreased , and modulus of compression to be increased
  笔者通过对钻孔两种方法获取的土样与竖井土样试验数据的对比发现，钻孔取样对土样有明显的扰动和压密作用，造成了土的干密度增大、孔隙比减小、渗透系数降低、压缩模量增大。