Evaluation of Allowable Pressure Under Foundations
To understand the surcharge effect on test-loading results, water-saturated loessial soils were tested by bearing plates of different sizes in open pits and boring holes. All pit bottoms were accurately prepared for experiments. The surcharge around the bearing plate with an area of 600 cm2 was simulated by special equipment. Results of field experiments showed that the proportionality limit for water-saturated loessial soils tested without surcharge was at least 25% less than obtained with the surcharge.