The beam centrifuge pile-jacking system of the University of Western Australia was employed to carry out the penetration mechanism of jacked pile in clay. A series of T-bar tests, sinking pile tests, pile tensile tests and pile compression tests were made in two-layered kaolin clay. The comparison and analysis were conducted to the applications of T-bar in homogeneous soft clay and in two-layered clay by measuring the undrained shear strength with different penetration depth. The profiles of penetration resistance, end resistance and shaft resistance during the pile installation as well as the changing of pile radial stresses during the pile installation were investigated. The different relationships between pile final pressure and pile bearing capacity were revealed. The results show that shaft resistance plays a major role in the whole pile penetration resistance in clay; for the same soil layer, the pile end resistance is not affected by the properties of adjacent soil layers when the pile end exceeds a certain range of influence below the soil interface; in addition, the time effect of pile shaft friction on bearing capacity is greater than that of end resistance.
|Number of pages||7|
|Journal||Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition)|
|Publication status||Published - 26 Nov 2018|