Research on Permeability Characteristics of Waterproof Curtain Slurry for Foundation pit in Saturated Sand

DOI

10.2991/978-94-6463-449-5_68How to use a DOI?

Keywords

slurry permeation; permeation patterns; formation mechanism of filter cake

Abstract

For the construction of a waterproof curtain in saturated and highly permeable sand, conventional slurry often fails to form a filter cake and instead penetrates through the sand, leading to a loss of impermeability at the working face and posing a risk of instability. This study, based on a self-designed 3D variable cross-section slurry permeation column test system, aims to investigate the mechanism of filter cake formation during slurry permeation. The results reveal distinct permeation patterns in the sand as the viscosity coefficient of the slurry increases, including the permeation zone type, filter cake - permeation zone type, and filter cake type. Low-viscosity slurry samples fail to develop a filter cake, resulting in the majority of slurry pressure acting on the sand layer, which is detrimental to both seepage prevention and face support. Conversely, high-viscosity slurry samples form a dense filter cake. The increase in slurry viscosity promotes stronger interactions between slurry particles and sand particles, leading to the formation of a denser filter cake with accelerated development. The increase in slurry viscosity promotes stronger interactions between slurry particles and sand particles, leading to the formation of a denser filter cake with accelerated development.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Xiaowen Ni
AU  - Zhaoyu Li
AU  - Xiangjian Wong
AU  - Liang Song
AU  - Dong Liu
AU  - Wenhu Wang
PY  - 2024
DA  - 2024/06/30
TI  - Research on Permeability Characteristics of Waterproof Curtain Slurry for Foundation pit in Saturated Sand
BT  - Proceedings of the 2024 8th International Conference on Civil Architecture and Structural Engineering (ICCASE 2024)
PB  - Atlantis Press
SP  - 699
EP  - 704
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-449-5_68
DO  - 10.2991/978-94-6463-449-5_68
ID  - Ni2024
ER  -