Key;
Laboratory;
of;
Ministry;
of;
Education;
for;
Geomechanics;
and;
Embankment;
Engineering,;
Hohai;
University;
Geotechnical;
Research;
Institute,;
Hohai;
University;
Department;
of;
Civil;
Engineering,;
Nagoya;
Institute;
of;
Technology;
Department;
of;
Civil;
Engineering,;
Shanghai;
University;
First;
Highway;
Consultants;
Co.;
Ltd.;
swelling; bentonite; montmorillonite; swelling; pressure; skeleton; void; ratio;