Taking Shenzhen soft soil as research object

the pore structure characteristic parameters were obtained by mercury intrusion porosimetry

and the relationship between compression modulus of soft soil under loading and the pore structure characteristics such as pore volume

pore size and pore connectivity was studied

then the mechanism of compression modulus changing with pore structure of soft soil under loading was discussed. The research shows that a negative power function relation exists between compression modulus of soft soil under loading and the pore structure characteristic parameters including total pore volume content

average pore size and pore connectivity value. And the change process of compression modulus of soft soil under loading with the pore structure might be divided the two stages.