ABSTRACT
In order to reveal the influence law of single pile behavior under the combined action of downforce load and horizontal load in loess, the straight pile model test is carried out indoors, the pile body strain of straight pile is obtained, the soil resistance and corresponding horizontal displacement are calculated, and the theoretical p-y curve of the single pile under combined load is established and verified. The results show that the maximum bending moment appears at the 3D depth below the mud surface. When the horizontal load is small, the soil around the pile is in the elastic stage. When the horizontal load increases, the soil around the pile begins to enter the plastic stage; the bending moment, soil reaction, and horizontal displacement all appear in the upper half of the pile body and tend to be zero at the bottom of the pile; the hyperbolic function distribution is more consistent with the measured p-y curve of the model test.
