论文部分内容阅读
静压桩的沉桩过程与桩端土性质密切相关,压桩力或桩端阻力在土层分界面上下发生变化,存在超前深度、滞后深度等现象,探讨分层土的沉桩机理对于合理确定静压桩的桩端持力层深度、进行桩基优化设计等方面都有重要意义。本文通过室内模型试验进行了静压桩在分层土中的沉桩分析,试验结果表明:同一桩径的桩在不同分层土中的沉桩特性不同,不同桩径的桩在同一分层土中的沉桩特性也不同,端阻力和压桩力在分层界面上下的变化趋势相近,分层界面处的土颗粒位移是分层效应产生的主要原因。
The pile sinking process of static pressure pile is closely related to the nature of the pile tip soil. The change of pile pressure or pile tip resistance at the interface of the soil layer changes. There are some phenomena such as advance depth and lag depth. It is of great importance to determine the depth of pile end holding layer of static pressure pile and to optimize the design of pile foundation. In this paper, through the indoor model test, the pile driving analysis of static pressure pile in the layered soil is carried out. The test results show that the pile driving characteristics of the pile with the same pile diameter are different in different layered soil, The characteristics of pile sinking in soil are also different. The trend of end resistance and pile pressing force in the up and down stratification interface are similar, and the displacement of soil particles at the stratification interface is the main reason for the stratification effect.