Experimental study on the one-dimensional nonlinear consolidation and seepage of saturated clay considering stress history under ramp loading

ZHANG Le; DANG Fa-ning; GAO Jun; DING Jiu-long

doi:10.16285/j.rsm.2020.1227

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Experimental study on the one-dimensional nonlinear consolidation and seepage of saturated clay considering stress history under ramp loading

更新时间：2026-06-25

- Experimental study on the one-dimensional nonlinear consolidation and seepage of saturated clay considering stress history under ramp loading
- Vol. 42, Issue 4, Pages: 1078-1087(2021)
- 作者机构：
  
  西安理工大学西北旱区生态水利国家重点实验室,陕西,西安,710048
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2020.1227
  CLC： TU442
- Online First：25 April 2021，
  
  Published：2021
- 稿件说明：
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ZHANG Le, DANG Fa-ning, GAO Jun, et al. Experimental study on the one-dimensional nonlinear consolidation and seepage of saturated clay considering stress history under ramp loading[J]. 2021, 42(4): 1078-1087.
DOI：

ZHANG Le, DANG Fa-ning, GAO Jun, et al. Experimental study on the one-dimensional nonlinear consolidation and seepage of saturated clay considering stress history under ramp loading[J]. 2021, 42(4): 1078-1087. DOI： 10.16285/j.rsm.2020.1227.

摘要

为研究线性加载条件下不同应力历史的饱和黏土的渗透性，利用改装后的GDS三轴仪进行了一维固结渗透联合试验，对陕西洛川粉质黏土重塑样的渗透系数变化规律进行了研究。研究结果表明，正常固结与超固结饱和黏土的渗透系数均随固结应力的增大而呈非线性减小，且两者的孔隙比与渗透系数随固结应力的变化趋势一致。处于超固结状态土体的压缩性和渗透性要比处于正常固结状态小得多。在同一固结应力下，渗透系数和孔隙比均随渗透压差的增大而减小。最后，将实测值与文献[12]中修正后的达西渗透系数公式、修正后的柯森?卡门公式、斯托克斯孔隙流渗透系数公式以及固结度渗透公式计算得到的渗透系数进行了比较。结果表明，用修正后的柯森–卡门渗透系数公式计算得到的渗透系数与实测值吻合较好，因此，推荐使用修正后的柯森–卡门渗透系数公式来预测洛川饱和黏土渗透系数。

Abstract

To study the permeability of saturated clays with different stress histories under ramp loading

the one-dimensional consolidation and seepage tests are carried out using modified GDS triaxial apparatus

and the change of the permeability coefficient of remolded silty clay in Luochuan

Shaanxi Province is studied. The results show that permeability coefficients of normally and over-consolidated saturated clays decrease nonlinearly with the increase of the consolidation stress

and the void ratios of these two soils are consistent with the trend of change of the permeability coefficients with the consolidation stress. The compressibility and permeability of soil in the over-consolidated state are much smaller than that in the normally consolidated state. The permeability coefficient and void ratio decrease with the increase of the osmotic pressure difference under a constant consolidation stress. Finally

the measured values are compared with the permeability coefficients calculated by the modified Darcy permeability coefficient formula

modified Kozeny-Carman formula

Stokes porosity permeability coefficient formula and degree of consolidation and seepage formula in Ref. [12]. The results reveal that the permeability coefficients calculated using the modified Kozeny-Carman formula are in good agreement with the measured values. Therefore

the modified Kozeny-Carman formula is recommended to predict the permeability coefficient of Luochuan saturated clay.

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