Research on Vertical Bearing Capacity of Super-Long Bored Pile

Abstract

With the rapid development of China’s economy, the scale and quantity of highway bridges are increasing rapidly, and there are more and more extra-long bridges. The number of super-large and ultra-deep foundations is increasing, and bored piles with convenient construction and high bearing capacity are adopted. Because the stress mechanism of pile is influenced by many factors, such as pile forming technology, soil characteristics, pile material properties, pile geometric characteristics, load, etc., the mechanism of stress transfer from single pile under vertical load, which is widely used in pile foundation engineering practice, has not yet been fully understood. The factors affecting the super-long pile are more complicated, its stress mechanism and bearing deformation characteristics are still rather vague, so there is no better calculation theory and method, which can accurately and quantitatively analyze the stress and strain of super-long pile foundation and simulate the whole deformation process. In this paper, the simulation analysis of pile-soil contact damage of super-long bored pile under vertical load was carried out by large-scale finite element software ANSYS, and mastered the vertical bearing capacity of super-long bored pile.