Based on the theoretical relations between hydraulic conductivity and soil structure,and by use of the fractal structure model of expansive soils,the relationships between hydraulic conductivity and water content,suction,time and overpressure are presented in this paper.

Experimental study on reinforcement treatment of saline soil ground with the soaking and dissolving method combined dynamic compaction;

Microscopic analysis of triaxial soaking process in original expansive soils;

Analysis of foundation processing technique soaking plus heavy tamping and its result;

The effect of wetting in site on seismic response of ground surface;

It is indicated that wetting would influence the bearing capacity of expansive soil foundation remarkably.

The mechanism for negative skin friction and the bearing behaviours of closed diaphragm walls after immersion were studied through model tests.

The tolerances of rice brown planthopper (BPH) biotypeⅡ and biotype Bangladesh’to high temperature, starvation, immersion, and insecticides were studied.

Study on test of saline soil ground treatment with the soaking and dissolving combined dynamic compaction method;

A series of soil mechanics tests(compression test,quick shear test and unconsolidated-undrained(UU) test are carried out using levee soils of downstream embankment of Yellow River,especially the strength test of the soils with different soaked periods.

An investigation of model test of deformation on high fills embankment soaked in water;

These roads are affected by water unavoidably and developed into the embankment soaked in water .