The radius of plastic area, the maximum compress stress caused by driving pile , and the pore water stress can be concluded by using the cavity expansion method and the effective stress theory.
分析了软土地基中静压桩的挤土效应机理，依据圆孔扩张理论和有效应力原理，推导出塑性区影响范围、桩对土体的挤压应力、孔隙水压力估算公式等。
In this paper research results are reviewed on compaction effect of jacked pile, specially on in-situ and laboratory experiments, the theory of cavity expansion and finite element method.
本文对压桩挤土效应方面的研究成果进行了综述，重点讨论了室内和现场试验、圆孔扩张理论、有限元计算的研究概况。
A new method is proposed to estimate the increment of the lateral pressure around the installing pile by combining the theory of cavity expansion with the limit equilibrium method.
通过理论推导提出了在土的极限平衡条件下结合小孔扩张理论估算单桩桩侧土压力增量的方法。
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