Experimental Study on Influence of Different Pile Installation Methods on Performance of Pile

抄録

In this research, penetration resistance and load-settlement relations of a pile installed by jack-in, surging and vibratory were investigated through model tests in dry or saturated sand grounds. An open-ended aluminum pipe having a length L of 597 mm, an outer diameter Do of 32.0 mm and an inner diameter Di of 29.3 mm was used for the model pile. The model pile was instrumented with axial strain gauges at 5 cross-sections to obtain axial forces in the pile. The model ground was dry or saturated silica sand in a cylindrical container having a diameter of 566 mm and a height of 540 mm. Relative densities Dr of the dry and saturated grounds were 80% and 70%, respectively. In the case of the saturated ground, 7 pore water pressure transducers were buried in the model ground at different depths and different horizontal distances from the pile. In each experiment, the model pile was first installed into the model ground by jack in or surging or vibratory to a depth of about 400 mm. After the installation process, a static load test (SLT) was carried out, in order to compare the load settlement behaviours of the pile installed by the three different methods.