Experimental Study on Water Stability of Polymer Stabilized Sand on River Bank Slope Surface

This paper aims to improve the mechanical properties of sand by using polymer soil stabilizers,and further to deal with the problem of water stability of surface sand on river slope. A series of experimental studies on water stability of the improved sand were carried out first in combination with immersion caving test and immersion shear test. Then the water stability of the sand before and after the improvement was compared and analyzed in detail. Finally,the improved mechanism was further analyzed by scanning electron microscope(SEM). Results show that polyurethane type polymer soil stabilizers can effectively improve the water stability of river slope surface sand. With the increase of stabilizer content and sand density,the dispersed area of the improved sand decreases after disintegra-tion. When the stabilizer content beyond 0.3%,the sample presents a stable state,remaining intact.On the whole,the shear strength of the improved sand samples under a vertical confinement of 200 kPa increases as the stabil