为分析温度和井阻对竖井地基固结的影响,建立竖井地基固结计算模型,并运用解析解法求出考虑温度和井阻的竖井地基固结一般解。通过退化研究并与已有解进行对比分析,验证此解的正确性与合理性。通过算例计算,绘制出考虑温度和井阻等因素影响的竖井地基固结曲线。研究结果表明:温度效应和井阻变化均对竖井地基固结影响较大;温度越高,固结速率越快,但温度变化对固结的影响逐渐减弱;当井径比和温度不变时,井阻达到一定值,固结速率趋于0,固结度会趋于某一数值;随着井阻的增大,超静孔压消散的速率明显减慢;温度越高,超静孔压消散速率越快。
Abstract
A calculation model for the consolidation of vertical drain foundation that considers temperature effects and well resistance change is established in this study. The general solution of consolidation for vertical drain foundations in consideration of temperature effects and well resistance change is obtained through analytical methods. The correctness and rationality of this solution are verified by degradation studies and comparisons with existing solutions. An example is used to draw the consolidation curve of a vertical drain foundation considering temperature effects and well resistance change. The results show that both temperature effects and changes in well resistance have a significant influence on the consolidation of vertical drain foundations. The higher the temperature, the larger the consolidation rate, but the influence of temperature on consolidation gradually weakens. Well resistance has a more significant effect on consolidation rate than temperature does. When the drain spacing ratio and temperature remain unchanged, and the well resistance reaches a certain value, the consolidation rate tends to be zero, and the consolidation degree tends to be a certain value. With an increase in well resistance, the dissipation of excess pore pressure slows down significantly. The higher the temperature, the faster the excess pore pressure dissipates.
关键词
竖井地基固结 /
超静孔压 /
温度 /
井阻 /
解析解
Key words
vertical drain foundation consolidation /
excess pore pressure /
temperature /
well resistance /
analytical solution
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参考文献
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基金
国家自然科学基金项目(U1204511,51509274);河南省高等学校重点科研项目(9A560027)
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