论文部分内容阅读
本文首先用无限土体平面应变圆柱形小孔扩张理论分析了沉桩的挤土机理;推导出饱和土中沉桩时,周围土体中超孔隙水压力的理论计算公式。其次,提出了单桩周围土体水平向位移的经验估算式;通过实例说明如何理论上估计单桩周围超孔隙水压力;给出桩、土界面附近超孔隙水压力的经验式。最后对打群桩引起的超孔隙水压力变化作了定性分析。
In this paper, firstly, the soil compaction mechanism of the pile is analyzed by using the theory of plane strain cylindrical hole expansion of the infinite soil, and the theoretical calculation formula of the excess pore water pressure in the surrounding soil is derived when the pile is driven in saturated soil. Secondly, an empirical formula for horizontal displacement of soil around a single pile is presented. The example shows how to theoretically estimate the excess pore water pressure around a single pile and the empirical formula for the excess pore water pressure near the interface between pile and soil. Finally, the qualitative analysis of the change of excess pore water pressure caused by pile grouping was made.