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Stability of long trench in soft soils by bentonite-water slurry

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Abstract

A series of centrifuge model tests exploring the effects of different types of slurry on long-trench stability in soft clay were conducted. The influence of groundwater conditions relative to trench stability was examined by constructing long trenches using different slurries. The soil deformation and surface settlement induced by the excavation of the trench are found to be closely related to slurry type and excavation depth of the long trench. Increasing the bentonite concentration of the slurry has beneficial effects on stability: 1) larger particles can improve local and global stability in cases where filter cakes do not form, and 2) larger viscosity can promote filter cake formation on the walls of long trenches excavated in soft clay and enhance their stability.

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Authors and Affiliations

  1. School of Engineering and Technology, China University of Geosciences (Beijing), Beijing, 100083, China

    Hong-chun Zhuo  (卓弘春) & Yu-you Yang  (杨宇友)

  2. Department of Geotechnical Engineering, School of Civil Engineering, Tongji University, Shanghai, 200092, China

    Zi-xin Zhang  (张子新) & Chun-hui Pan  (潘春晖)

  3. Shanghai Urban Construction (Group) Corporation, Shanghai, 200023, China

    Chuang-feng Duan  (段创峰)

Authors
  1. Hong-chun Zhuo  (卓弘春)
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  2. Yu-you Yang  (杨宇友)
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  3. Zi-xin Zhang  (张子新)
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  4. Chun-hui Pan  (潘春晖)
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  5. Chuang-feng Duan  (段创峰)
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Corresponding author

Correspondence to Yu-you Yang  (杨宇友).

Additional information

Foundation item: Project(41202220) supported by the National Natural Science Foundation of China; Project(20120022120003) supported by the Research Fund for the Doctoral Program of Higher Education, China; Project(2652012065) supported by the Fundamental Research Funds for the Central Universities and Beijing Higher Education Young Elite Teacher Program, China

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Zhuo, Hc., Yang, Yy., Zhang, Zx. et al. Stability of long trench in soft soils by bentonite-water slurry. J. Cent. South Univ. 21, 3674–3681 (2014). https://doi.org/10.1007/s11771-014-2350-4

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  • DOI: https://doi.org/10.1007/s11771-014-2350-4

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