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Barrier Effect of Modified Cushion on Salinity Deterioration in the Basal Sapping Zone of Earthen Sites

  • TECHNOLOGY AND WORK PRODUCTION
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Soil Mechanics and Foundation Engineering Aims and scope

Based on the discovery of the "natural orange soil layer" in the wall foundation of the Ming Great Wall in Huangzhong County, Xining City, northwest China, this paper reveals the mechanism behind the barrier effect of this layer on the salinity deterioration through the combination of qualitative judgment and quantitative testing. Based on this mechanism, the conventional lime soil was improved by adding modified polyvinyl alcohol as the cementing agent and fly ash, thereby generating a modified cushion material. Indoor tests of freeze-thaw and temperature-humidity cycles for the modified cushion material were then conducted alongside field tests of rammed restorations in the basal sapping zone with and without the modified cushion. The test results show that the modified cushion materials have excellent durability and act as a substantial barrier to salinity deterioration. The research results provide a new approach to repairing the basal sapping of earthen sites.

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Authors and Affiliations

  1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China

    Kai Cui, Donghua Wang, Xinyue An, Li Yu & Guopeng Wu

  2. Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou, China

    Kai Cui, Donghua Wang, Xinyue An, Li Yu & Guopeng Wu

Authors
  1. Kai Cui
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  2. Donghua Wang
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  3. Xinyue An
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  4. Li Yu
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  5. Guopeng Wu
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Corresponding author

Correspondence to Donghua Wang.

Additional information

Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 3, p. 19, May-June, 2020.

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Cui, K., Wang, D., An, X. et al. Barrier Effect of Modified Cushion on Salinity Deterioration in the Basal Sapping Zone of Earthen Sites. Soil Mech Found Eng 57, 227–236 (2020). https://doi.org/10.1007/s11204-020-09659-y

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  • DOI: https://doi.org/10.1007/s11204-020-09659-y

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