Simulation on open-ended pipe pile installation using transparent soil technology

The open-ended pile due to the existence of the soil effect, its installation mechanism is more complex than the solid pile. The traditional measurement method cannot measure the displacement field of the soil around the pile and the concrete situation of the soil. Using the transparent soil technology, the installation of the open-ended pile with different pile diameter and wall thickness is simulated to obtain the total soil displacement field, height changes in the soil plug, the displacement vector field of the soil plug and the displacement of neutral surface in soil plug. Through the analysis of the test results, we can get the following conclusions: The transverse range of soil deformation area caused by the installation of the open-ended pile with different cross-sectional dimensions is inversely proportional to the ratio of the diameter and wall thickness (r/w), and the transverse influence range is increased by 67% for each installation into the 2R depth of the pile out diameter R. When the outer diameter is equal, r/w value difference of 150%, the soil height difference of 186%, the soil effect is independent of the pile diameter, but is related to r/w. When the wall thickness is kept constant, the height change of the soil plug is about twice as much as the change of the inner and outer diameter ratio (R/r), when the soil plug reaches the fully closed state, the soil at the pile tip will suffer the shear failure, so that the pile cavity influx into the new soil will form a new soil plug.