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Experimental Study on the Effect of Additives on Drainage Consolidation in Vacuum Preloading Combined with Electroosmosis

  • Geotechnical Engineering/Technical Note
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

Vacuum-electroosmosis is a common method of foundation treatment; however, it is disadvantaged by fine soil particles clogging the drainage plate. To overcome this issue, this study treated the dredged fill from vacuum-electroosmosis with different additives. The parameters of discharged water, current, water content, and shear strength of soils treated with different amounts of Ca(OH)2, FeCl3, and NaCl were analyzed. The results showed that different additives have different effects on the vacuum-electroosmosis method for reinforcing dredger filling. Excessive additive contents were found to have an adverse effect on vacuum-electroosmosis, and hence, optimum amounts are required for the three additives. On comparing the optimum dosage of these additives, FeCl3 was observed to be the most energy-saving. From the aspect of anode corrosion and the costs involved, Ca(OH)2 was the most economical. For practical engineering applications, Ca(OH)2 was the most preferable additive. The results of this study provide guidance and scientific criteria for similar dredging foundation treatments.

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Acknowledgements

This research was supported by National Key R&D Program of China (2016YFC0800200), the National Natural Science Foundation of China (grant No.51778500, 51778501, and 51620105008), the Zhejiang Province Natural Foundation projects of China (grant No. LR18E080001 and LY20E080029), Key Research and development program of Zhejiang Province (grant No. 2018C03038), Program of Science and Technology of Wenzhou (grant No. S20160009). This financial support is gratefully acknowledged.

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Authors and Affiliations

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

    Jianli Hu, Xiaobing Li, Jun Wang & Xiuqing Hu

  2. Management Department, Zhejiang Industry & Trade Vocational College, Wenzhou, 325035, China

    Dikang Zhang

  3. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, 310014, China

    Yuanqiang Cai

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  1. Jianli Hu
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  2. Xiaobing Li
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  3. Dikang Zhang
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  4. Jun Wang
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Correspondence to Jun Wang.

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Hu, J., Li, X., Zhang, D. et al. Experimental Study on the Effect of Additives on Drainage Consolidation in Vacuum Preloading Combined with Electroosmosis. KSCE J Civ Eng 24, 2599–2609 (2020). https://doi.org/10.1007/s12205-020-1900-6

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