| 温州浅滩淤泥固结系数与固结应力关系研究 |
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| 引用本文： | 吴雪婷.温州浅滩淤泥固结系数与固结应力关系研究[J].岩土力学,2013,34(6):1675-1680. |
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| 作者姓名： | 吴雪婷 |
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| 作者单位： | 中国地质大学（武汉） 工程学院，武汉 430074 |
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| 摘 要： | 固结系数在软土压缩过程中并非常数，其变化规律与土体的工程特性、先期固结压力、有效固结应力等因素有关。当固结应力小于土体的先期固结压力时（ ），随着应力的增加，固结系数减小；当固结应力达到其先期固结压力时（ ），固结系数取最小值；当固结应力超过先期固结压力后（ ），随着应力的继续增加，淤泥固结系数又逐渐增大。温州淤泥的固结系数与固结应力之间存在显著的双对数（ln( 或 )- ）线性相关性，其分段拟合公式在先期固结压力 的前后分为两段。利用“改进的门田法”求解的淤泥层在压缩过程中，固结系数的变化规律，进一步说明和验证了这一结论。利用双对数拟合公式可较准确推求整个加载过程中淤泥的固结系数，为固结沉降计算提供重要的参数。
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| 关 键 词： | 淤泥 固结系数 固结应力 先期固结压力 |
| 收稿时间： | 2012-04-17 |
Research on relation between consolidation coefficient and consolidation stress of silt in Wenzhou shoal |
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| WU Xue-ting.Research on relation between consolidation coefficient and consolidation stress of silt in Wenzhou shoal[J].Rock and Soil Mechanics,2013,34(6):1675-1680. |
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| Authors: | WU Xue-ting |
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| Institution: | Faculty of Engineering, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | The consolidation coefficient is not a constant in the process of soft-soil consolidation. The variation regularity of consolidation coefficient is related to engineering properties of soil, preconsolidation pressure and effective consolidation stress. When the consolidation stress is less than the preconsolidation pressure ( ), the consolidation coefficient decreases with the increasing of consolidation stress. When the consolidation stress equals to the preconsolidation pressure ( ), the consolidation coefficient takes the minimum value. When the consolidation stress is greater than the preconsolidation pressure ( ), the consolidation coefficient of silt increases with the increasing of consolidation stress. There is an apparent double logarithmic linear correlation between consolidation coefficient and consolidation stress(ln( or )- ) of Wenzhou silt. The fitting formula is a piecewise function according to the preconsolidation pressure( ). The variation regularity of consolidation coefficient during soil consolidation gotten by improved Kadota method further illustrates and verifies the expression presented. The consolidation coefficient of silt during the entire loading procedure could be calculated by the double logarithmic fitting formula accurately, which provides the important parameter for the consolidation settlement calculation. |
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| Keywords: | silt consolidation coefficient consolidation stress preconsolidation pressure |
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