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| 掺砂软黏土一维压缩和渗透性状研究 |
| Research on One‑dimensional Compression and Permeability Properties of Sand‑doped Soft Clay |
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| DOI：10.16018/j.cnki.cn32-1650/n.202303002 |
| 中文关键词: 真空预压 掺砂率 软黏土 压缩性状 渗透性状 |
| 英文关键词: vacuum preloading sand mixing ratio soft clay compression character permeability properties |
| 基金项目: |
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| 摘要点击次数: 38 |
| 全文下载次数: 45 |
| 中文摘要: |
| 针对真空预压法加固软黏土地基存在深层土体加固效果差的问题，提出掺砂改良软黏土压缩和渗透特性的方法。通过室内掺砂软黏土的一维固结渗透试验，探讨了掺砂率对软黏土压缩性状和渗透性状的影响规律，建立了掺砂土体的归一化压缩公式，得出了如下结论: 不同掺砂率土体的压缩曲线形态相近；与初始孔隙比相比，1 600 kPa荷载下的孔隙比减小幅度均在45%左右；可根据参数e/eL对压缩曲线进行归一化处理；孔隙比相同时，渗透系数随着掺砂率的增大而增大；掺砂土体的压缩系数、压缩指数和渗透指数均随掺砂率的增加呈幂函数减小规律。 |
| 英文摘要: |
| In order to solve the existed problem of poor reinforcement effect of deep soil in soft clay foundation reinforced by vacuum preloading method, a method of sand mixing to improve the compression and permeability characteristics of soft clay was proposed. In this paper, one?dimensional consolidation and permeability tests of sand-doped soft clay are carried out indoors, the influence of sand ratio on the compression and permeability properties of soft clay is discussed, the normalized compression formula of sand-doped clay is established. The results are listed as follows: compression curve morphology of soils with different sand mixing ratios is similar. Compared with the initial pore ratio, the pore ratio decreases by about 45% under the 1 600 kPa load. The compression curves can be normalized according to the parameter e/eL. As the pore ratio is the same, the permeability coefficient increases with the increase of sand mixing ratio. The compression coefficient, compression index and permeability index of sand-doped soil decrease by power function with the increase of sand mixing ratio. |
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