Analysis of uplift bearing characteristics and deformation prediction of root pile

Abstract

Abstract: The full-scale field test of root pile shows that implantation of roots not only greatly improves the bearing capacity of foundation, but also effectively restrains the displacement of pile attributed to the stable exertion of root resistance. However, due to the limitation of test conditions, the ultimate bearing capacity of root piles has not been measured under various combination modes, and the existing results alone can not systematically predict the ultimate bearing capacity of root piles. Therefore, ABAQUS software is used to simulate and analyze the full-scale test mentioned. By comparing Q-S curves under different root densities and locations, the influence rule of different root combinations on the bearing capacity and the change of the bearing characteristics of the roots are determined. Based on the load transfer theory, a nonlinear deformation calculation method of the root pile considering the influence of the root bond density and the spacing is proposed. The results show that the theoretical prediction highly agrees with the simulation results, which correctly reflect the deformation law of the foundation under different root bond combination modes.

Key words: root pile, uplift bearing characteristics, numerical simulation, theoretical calculation

CLC Number:

TU473.1

HUANG Xue-feng, ZHANG Ji-lu, ZHOU Jun-peng, WEI Lin-hui YUAN Jun, WANG Xue-ming. Analysis of uplift bearing characteristics and deformation prediction of root pile[J]. Journal of Lanzhou University of Technology, 2023, 49(1): 119-126.

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