Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area

Yang Aiwu; Yang Shaokun; Wu Kelong; Sun Baishun

doi:doi:10.11648/j.sd.20231102.18

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Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area

Yang Aiwu, Yang Shaokun, Wu Kelong, Sun Baishun

Published in Science Discovery (Volume 11, Issue 2)

Received: 21 April 2023 Accepted: 20 April 2023 Published: 23 April 2023

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Abstract

Taking the soft clay of Tianjin Binhai New Area as the research object, the cross-plate shear instrument was used to test the remodeled soil samples with different moisture content for thixotropic time of 1d, 4d, 7d, 10d, and 15d. Then the samples after 15 days of standing were taken for heap load test to investigate the strength change mechanism under natural standing and graded loading, respectively. Meanwhile, the microstructure evolution mechanism was revealed by scanning electron microscopy. The results show that with increase the water content, the increase of soil strength gradually slows down under thixotropic action. When the water content reaches 50% or above, the soil strength hardly increases any more. The strength increases due to the heap load, but there is often accompanied by large deformation or settlement, with the increase of water content. In the process of soil thixotropy, the overall structure gradually changed from the sheet stacked structure to the laminated scaffold structure. The number of particles and pores decreases. The equivalent diameter, roundness, as well as morphology ratio of particles increase, while the changes of these microscopic parameters of pores show an opposite trend. On this basis, thixotropy was used to prepare foundation soil of model and large-scale model tests were carried out to reveal the real situation of the interaction of wave-breakwater-soft soil foundation. The research results can provide reference for the application of soft soil thixotropy under wave action in the foundation of semicircular breakwater.

Published in	Science Discovery (Volume 11, Issue 2)
DOI	10.11648/j.sd.20231102.18
Page(s)	74-82
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2023. Published by Science Publishing Group

Keywords

Soft Soil, Thixotropy, Microstructure Parameter, Semi-Circular Breakwater, Large Scale Model Experiment

References

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APA Style

Yang Aiwu, Yang Shaokun, Wu Kelong, Sun Baishun. (2023). Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area. Science Discovery, 11(2), 74-82. https://doi.org/10.11648/j.sd.20231102.18

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ACS Style

Yang Aiwu; Yang Shaokun; Wu Kelong; Sun Baishun. Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area. Sci. Discov. 2023, 11(2), 74-82. doi: 10.11648/j.sd.20231102.18

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AMA Style

Yang Aiwu, Yang Shaokun, Wu Kelong, Sun Baishun. Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area. Sci Discov. 2023;11(2):74-82. doi: 10.11648/j.sd.20231102.18

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@article{10.11648/j.sd.20231102.18,
  author = {Yang Aiwu and Yang Shaokun and Wu Kelong and Sun Baishun},
  title = {Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area},
  journal = {Science Discovery},
  volume = {11},
  number = {2},
  pages = {74-82},
  doi = {10.11648/j.sd.20231102.18},
  url = {https://doi.org/10.11648/j.sd.20231102.18},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20231102.18},
  abstract = {Taking the soft clay of Tianjin Binhai New Area as the research object, the cross-plate shear instrument was used to test the remodeled soil samples with different moisture content for thixotropic time of 1d, 4d, 7d, 10d, and 15d. Then the samples after 15 days of standing were taken for heap load test to investigate the strength change mechanism under natural standing and graded loading, respectively. Meanwhile, the microstructure evolution mechanism was revealed by scanning electron microscopy. The results show that with increase the water content, the increase of soil strength gradually slows down under thixotropic action. When the water content reaches 50% or above, the soil strength hardly increases any more. The strength increases due to the heap load, but there is often accompanied by large deformation or settlement, with the increase of water content. In the process of soil thixotropy, the overall structure gradually changed from the sheet stacked structure to the laminated scaffold structure. The number of particles and pores decreases. The equivalent diameter, roundness, as well as morphology ratio of particles increase, while the changes of these microscopic parameters of pores show an opposite trend. On this basis, thixotropy was used to prepare foundation soil of model and large-scale model tests were carried out to reveal the real situation of the interaction of wave-breakwater-soft soil foundation. The research results can provide reference for the application of soft soil thixotropy under wave action in the foundation of semicircular breakwater.},
 year = {2023}
}

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TY - JOUR
T1 - Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area
AU - Yang Aiwu
AU - Yang Shaokun
AU - Wu Kelong
AU - Sun Baishun
Y1 - 2023/04/23
PY - 2023
N1 - https://doi.org/10.11648/j.sd.20231102.18
DO - 10.11648/j.sd.20231102.18
T2 - Science Discovery
JF - Science Discovery
JO - Science Discovery
SP - 74
EP - 82
PB - Science Publishing Group
SN - 2331-0650
UR - https://doi.org/10.11648/j.sd.20231102.18
AB - Taking the soft clay of Tianjin Binhai New Area as the research object, the cross-plate shear instrument was used to test the remodeled soil samples with different moisture content for thixotropic time of 1d, 4d, 7d, 10d, and 15d. Then the samples after 15 days of standing were taken for heap load test to investigate the strength change mechanism under natural standing and graded loading, respectively. Meanwhile, the microstructure evolution mechanism was revealed by scanning electron microscopy. The results show that with increase the water content, the increase of soil strength gradually slows down under thixotropic action. When the water content reaches 50% or above, the soil strength hardly increases any more. The strength increases due to the heap load, but there is often accompanied by large deformation or settlement, with the increase of water content. In the process of soil thixotropy, the overall structure gradually changed from the sheet stacked structure to the laminated scaffold structure. The number of particles and pores decreases. The equivalent diameter, roundness, as well as morphology ratio of particles increase, while the changes of these microscopic parameters of pores show an opposite trend. On this basis, thixotropy was used to prepare foundation soil of model and large-scale model tests were carried out to reveal the real situation of the interaction of wave-breakwater-soft soil foundation. The research results can provide reference for the application of soft soil thixotropy under wave action in the foundation of semicircular breakwater.
VL - 11
IS - 2
ER -

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Author Information

Yang Aiwu

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, P.R. China
Yang Shaokun

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, P.R. China
Wu Kelong

Tianjin Key Laboratory of Soft Soil Engineering Characteristics and Engineering Environment, Tianjin Chengjian University, Tianjin, P.R. China
Sun Baishun

Tianjin Research Institute for Water Transport Engineering, National Engineering Laboratory for Port Hydraulic Construction Technology, Tianjin, P.R. China

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APA Style

Yang Aiwu, Yang Shaokun, Wu Kelong, Sun Baishun. (2023). Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area. Science Discovery, 11(2), 74-82. https://doi.org/10.11648/j.sd.20231102.18

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ACS Style

Yang Aiwu; Yang Shaokun; Wu Kelong; Sun Baishun. Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area. Sci. Discov. 2023, 11(2), 74-82. doi: 10.11648/j.sd.20231102.18

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AMA Style

Yang Aiwu, Yang Shaokun, Wu Kelong, Sun Baishun. Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area. Sci Discov. 2023;11(2):74-82. doi: 10.11648/j.sd.20231102.18

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@article{10.11648/j.sd.20231102.18,
  author = {Yang Aiwu and Yang Shaokun and Wu Kelong and Sun Baishun},
  title = {Research and Application of Thixotropy of Soft Soil in Tianjin Binhai New Area},
  journal = {Science Discovery},
  volume = {11},
  number = {2},
  pages = {74-82},
  doi = {10.11648/j.sd.20231102.18},
  url = {https://doi.org/10.11648/j.sd.20231102.18},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20231102.18},
  abstract = {Taking the soft clay of Tianjin Binhai New Area as the research object, the cross-plate shear instrument was used to test the remodeled soil samples with different moisture content for thixotropic time of 1d, 4d, 7d, 10d, and 15d. Then the samples after 15 days of standing were taken for heap load test to investigate the strength change mechanism under natural standing and graded loading, respectively. Meanwhile, the microstructure evolution mechanism was revealed by scanning electron microscopy. The results show that with increase the water content, the increase of soil strength gradually slows down under thixotropic action. When the water content reaches 50% or above, the soil strength hardly increases any more. The strength increases due to the heap load, but there is often accompanied by large deformation or settlement, with the increase of water content. In the process of soil thixotropy, the overall structure gradually changed from the sheet stacked structure to the laminated scaffold structure. The number of particles and pores decreases. The equivalent diameter, roundness, as well as morphology ratio of particles increase, while the changes of these microscopic parameters of pores show an opposite trend. On this basis, thixotropy was used to prepare foundation soil of model and large-scale model tests were carried out to reveal the real situation of the interaction of wave-breakwater-soft soil foundation. The research results can provide reference for the application of soft soil thixotropy under wave action in the foundation of semicircular breakwater.},
 year = {2023}
}

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