Abstract：
The characteristics were checked that the clay would swell in water, by using the methods of wetting-drying cycle and limiting soil expansion. The paper found law that the shear strength of clay would drop dramatically while its density reduced to a certain value, and proclaimed the causes for the slope instability of the flexible supporting slope after rain.
LU Yi－ｆａｎ,ZHANG Sheng－jun,LI Hui－qiang et al. SOIL TEST RESEARCH ON INSTABILITY OF FLEXIBLE SUPPORTING FOUNDATION PIT AFTER RAIN[J]. Architecture Technology, 2013, 44(5): 423-426.
