考虑复杂荷载及井阻非线性时竖井地基固结解析解研究

发布时间：2018-03-06 14:35

本文选题：径向固结理论　切入点：井阻非线性　出处：《水文地质工程地质》2017年01期 　论文类型：期刊论文

【摘要】：根据浙江沿海地区滩涂围垦中的淤泥基础海堤工程设计经验,认为软土工程中竖井地基固结计算需考虑井阻随时间的影响,基于竖井渗透系数随时间指数衰减关系假定,利用竖井地基径向固结理论和等应变假设,并考虑多级线性加载及循环荷载等复杂荷载作用,重新推导了考虑井阻非线性影响下竖井地基固结解析解,通过与TANG X W等(2000)、Zhu G等(2004)恒定井阻地基固结理论的对比,验证了本文理论的正确性。根据本文理论,通过对比分析,认为线性加载时间越长,竖井地基前期固结速率越慢,与骤加恒载工况差异越显著。在循环荷载作用下,地基固结速率一般介于荷载最大值和荷载最小值的恒载情况之间;且固结度随外荷载的波动而相应地滞后性震荡,竖井渗透系数衰减越快,其震荡越明显,最终趋向于稳定震荡。
[Abstract]:According to the Zhejiang coastal reclamation silt foundation in the seawall engineering design experience, that the calculation of soft soil engineering shaft foundation consolidation should be considered well resistance with time, vertical permeability coefficient with time exponential relationship based on the assumption, the foundation consolidation theory and radial shaft strain hypothesis and considering multilevel linear loading and cyclic loading the complex load, to derive the analytical foundation consolidation shaft resistance under the influence of the nonlinear solution, with TANG X W (2000), Zhu G (2004) compared with the constant well resistance consolidation theory, verify the correctness of the theory. According to this theory, through comparative analysis, linear loading the longer shaft foundation pre consolidation rate is slower, and the sudden constant load difference is more obvious. Under cyclic load, the consolidation rate between the maximum load and the load Between the small load and the dead load, the degree of consolidation is lagged behind with the fluctuation of external load, and the attenuation of shaft permeability is faster. The more obvious the concussion, the more stable it will eventually become.

【作者单位】：浙江省水利水电勘测设计院;宁波大学岩土工程研究所;
【基金】：浙水院科标业项目资助(B1608;B1609) 水利部公益性行业科研专项项目(201401010)
【分类号】：U656.314

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