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采用弹塑性力学理论中的圆孔扩张理论和球形扩张理论分析载体桩施工过程中桩身和复合载体的挤土效应,确定塑性区的半径。计算结果表明,在载体桩的施工过程中,影响邻桩施工质量的因素是复合载体的施工,而非桩身的成孔影响。根据球形扩张理论,可以大致预估出施工过程中桩间土的隆起。分析为设计提供了一定的参考,并通过实际工程验证了结论的正确性。
The squeezing effect of the pile body and the composite carrier during the construction of the carrier pile was analyzed using the hole expansion theory and the spherical expansion theory in the elasto-plastic mechanics theory, and the radius of the plastic zone was determined. The calculation results show that in the process of construction of the carrier piles, the factors influencing the construction quality of the adjacent piles are the construction of the composite carrier, rather than the hole forming effect of the pile. According to the spherical expansion theory, the uplift of soil between piles during construction can be roughly estimated. The analysis provided a certain reference for the design, and the correctness of the conclusion was verified through practical engineering.