| 齐清兰,张力霆,张振军,魏静.渗透力作用下黏土的大应变固结理论与试验研究[J].水利学报,2006,37(6):734-739 |
| 渗透力作用下黏土的大应变固结理论与试验研究 |
| Spatial variability of agricultural pollutions in complicated landscape system with multiple ponds |
| 投稿时间：2005-08-04 |
| DOI： |
| 中文关键词: 铺盖裂缝 渗透力 淤填土固结 超孔隙水压力 固结度 大应变 |
| 英文关键词: crack of blanket permeation pressure consolidation of warping clay excessive pore water pressure consolidation degree large strain |
| 基金项目: |
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| 摘要点击次数: 2130 |
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| 中文摘要: |
| 针对黏土铺盖裂缝的淤填处理问题，对渗透力作用下淤填黏土的固结机理进行了阐述，推导出以超孔隙水压力为控制变量的大应变固结微分方程。在理论模型推导中，考虑了孔隙比与有效应力以及渗透系数与孔隙比之间的非线性关系。通过渗透诱发固结试验确定了微分方程中的待定参数。此类参数为随有效应力和土层深度变化的量，体现了软黏土初始孔隙比、压缩性、渗透性及其沿深度变化等因素的综合影响。应用数值方法求解微分方程，得到超孔隙水压力沿深度的分布规律以及固结度的时空变化。对某水库土坝水平铺盖裂缝处淤填黏土固结过程的数值计算结果通过室内模型试验得到了验证。 |
| 英文摘要: |
| The consolidation mechanism of warping clay under permeation pressure happened to the repairing of blanket cracking is studied and the differential equation for large strain consolidation of clay is deduced. In the equation the excessive pore pressure is selected as controlling variable and the non linear relationships between the void ratio and effective stress and between permeability coefficient and void ratio are taken into account. The parameters of the equation are determined by permeation induced consolidation test, which are varying with the effective stress and the depth of clay. These parameters reflect the comprehensive effect of initial and variation of void ratio, compressibility and permeability along the depth. Numerical method is applied to solve the differential equation, and the distribution law of excessive pore water pressure along the depth and temporal spatial variation of consolidation degree are obtained. The numerical calculation result of the consolidation process of warping clay in the blanket crack of a small dam is verified by model test and engineering practice. |
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