动力沉桩超孔隙水压力时程消散模型研究

阐述了有关超孔隙压力的研究现状,基于孔隙水压力相关理论和必要假定,给出了适于工程实际应用的动力沉桩超孔隙水压力时程消散模型,以及用于模型求解的非线性最小二乘迭代法。该模型能够有效模拟空间一点处超孔隙水压力的时程消散过程,模型将整个动力沉桩过程中超孔隙水压力的增加和其后超孔隙水压力的消散过程划分为3个区。该模型可用于预测动力沉桩后超孔隙压力消散到安全限值所需时间,为桩基础施工等提供有益指导。通过华能大庆电厂工程实例进行验证,该模型对于研究超孔隙水压力时程消散问题具有避免过多主、客观因素干扰,便于程序实现,计算过程清晰,结果明确的特点,适于工程实际应用。

Study on Excess Pore Water Pressure Duration Dissipation Model During Dynamic Pile

The status in quo of excess pore pressure in research is described briefly.According to the theory pore pressure and some essential assumer,the excess pore water pressure duration dissipation model during dynamic pile is formed,which is fit for the application of real project,the method of model solution is nonlinear least squares iterative method.The model has the capacity to simulate the excess pore pressure duration dissipation of some point in 3D space.The excess pore pressure duration dissipation is di...