Study on the flow plasticity and permeability of mixed and improved shield residue in water-rich sand layer

DOI

10.2991/978-94-6463-398-6_5How to use a DOI?

Keywords

Shield tunnel; slag improvement; experimental study; water-rich sand layer; flow plasticity; permeability

Abstract

Shield tunneling in water-rich sand layer is prone to problems such as high cutter torque and severe wear, and spiral transporter gushing. Based on this, this paper takes the shield project of Xi’an Metro Line 10 interval as the basis, and carries out the experimental research on the improvement of slag soil in water-rich sand layer through the combination of slag soil slump test, penetration test and field inspection. The test results show that: when the mass ratio of bentonite to water is 1/8 and the concentration of foaming liquid is 3%, the performance of the improver meets the construction requirements; Foaming agent and bentonite improved better. When the slurry injection ratio (BIR) is 10% and the foam injection rate (FER) is 20%-25%, the improvement effect of medium sand is the best. When the slurry injection ratio is 10% and the foam injection rate is 35%-40%, the improvement effect of gravel sand is the best. Applying the test results to engineering practice, the effect of soil conditioning is good, and the parameters of shield tunneling are stable.

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  - Jinlong Wang
AU  - Haijun Han
AU  - Chaojun Mao
AU  - Guobo Liu
AU  - Angang Yang
PY  - 2024
DA  - 2024/04/24
TI  - Study on the flow plasticity and permeability of mixed and improved shield residue in water-rich sand layer
BT  - Proceedings of the 2023 5th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2023)
PB  - Atlantis Press
SP  - 33
EP  - 41
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-398-6_5
DO  - 10.2991/978-94-6463-398-6_5
ID  - Wang2024
ER  -