基于应变路径法的压入管桩单桩挤土位移场的参数影响分析

Parameters Impact Analysis on Compacting Displacement of Press-in Pipe Pile Based on Strain Path Method

分析《基于应变路径法的压入管桩单桩挤土位移研究》中所得的压入管桩单桩挤土位移场解析解,影响因素主要有管桩内外径、桩长、土塞高度最大值。该文分析了不同桩长、ξr(管桩内外径比值)和ξh(土塞高度最大值与桩长的比值)情况下压入管桩压桩产生的挤土位移,研究结果表明:不同桩长情况下竖向和水平挤土位移沿深度方向和径向的分布规律趋于一致;不同ξr、ξh情况下竖向挤土位移沿深度方向和径向的分布规律趋于一致,水平挤土位移沿径向的分布规律趋于一致,沿深度方向的分布规律有所差异。数值上,桩越长、ξr越小、ξh越小,压桩产生的挤土位移越大。为下一步压入管桩的优化设计奠定基础。

The analytic solution of compacting displacement of single press-in pipe pilein Study on Compacting Displacement of Press-in Pipe Pile Based on Strain Path Method is analyzed,with the main influencing factors of internal and external diameter of pipe pile, pile length and maximum height of Soil-Plug.The compacting displacement of press-in pipe pile with different pile lengths,ξr and ξh is studied. The results show that the regularity distribu- tions of vertical and horizontal compacting displacement converge for different pile lengths along the depth and the radial, the regularity distribution of vertical compacting displacement converge for different ξ, and ξh along the depth and the radial, ξr and ξh the regularity distribution of the horizontal compacting displaeenaent converge along the radial while the regularities of distribution are different along the depth. Numerically, the longer the pile is, the smaller the is,and the smaller the is, the bigger the compacting displacement is, laying the foundation for an optimal design for press-in pipe pile.