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Non-uniform Consolidation of Soil and Influence of Corresponding Clogging Effect During Vacuum Preloading

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Abstract

Non-uniform consolidation of dredged soil under the vacuum preloading and corresponding clogging effect were investigated by series tests. Water content and permeability of soil at different consolidation distances and time were measured during the vacuum preloading. The drainage water volume and drainage rate in the test were also recorded. Test results showed that the uniform soil became non-uniform once the vacuum preloading started. Permeability of soil near the drainage boundary decreased by 50–100 times at the very beginning of vacuum preloading, leading to a serious clogging effect that reduced the drainage rate of soil by around 90% at the same time. Non-uniformity and clogging effect of soil reached the peak value after 24–48 h vacuum preloading in different cases. Based on the test results and Ruth theory, it was found that lower water content, higher salt content, lower vacuum pressure and flocculant additive relieved the clogging effect and made the soil more uniform after the consolidation. Finally, comparison between test and analytical results clarified that the non-uniformity and clogging effect should be considered in the consolidation of soil under the vacuum preloading.

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Data Availability

The datasets generated for this study are available on request to the corresponding author.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (Grant No. 51778499).

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Authors and Affiliations

  1. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, 325035, Zhejiang, China

    Peng Wang

  2. Zhejiang Inestitute of Communications CO.,LTD, Hangzhou, 310030, China

    Jianfeng Wu

  3. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, 325035, Zhejiang, China

    Xueyan Ge & Fan Chen

  4. First Company of China Construction Eighth Engineering Division Ltd, LiXia District, Jinan, 250014, China

    Xiaotian Yang

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  1. Peng Wang
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  4. Fan Chen
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Correspondence to Xueyan Ge.

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Wang, P., Wu, J., Ge, X. et al. Non-uniform Consolidation of Soil and Influence of Corresponding Clogging Effect During Vacuum Preloading. Int. J. of Geosynth. and Ground Eng. 8, 58 (2022). https://doi.org/10.1007/s40891-022-00402-1

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