Experimental Study on Back Fill Material of a High Fill Slope

Aiming at the problem of high fill slope engineering in China’s airports, a high fill slope project of a new airport was selected as the research object. Through on-site engineering investigation, it was found that the backfill material was mainly moderately weathered stone, with high strength and not easy to break, accompanied by silty clay. The particle shape was mainly high angular and the surface was rough. In order to explore the mechanical properties of backfill materials for high fill slope of airport, the material parameters were calibrated by indoor screening test, stone wear and liquid-plastic limit test, natural water content test and saturated water absorption test.