Effect of Subsoil Replacement in Frost-Sensitive Areas on the Frost Deformation of Channel

DOI

10.2991/978-94-6463-398-6_67How to use a DOI?

Keywords

channel frost heave; frozen soil; replacement soil; numerical simulation

Abstract

The water content of the subsoil is one of the main factors affecting the subsidence of the channel bank slopes, the looser the soil quality of the bank slopes, the greater the water content, the greater the deformation of the channel bank slopes, the use of non-freezing and expansion sensitive materials to replace the bank slopes with wet subsiding soil is an effective way to solve the problem of frequent freezing and expansion of the channel bank slopes. In order to solve the problem of frozen expansion damage caused by groundwater level change and repeated freezing and thawing of seasonal frozen soil foundation in the cold and dry irrigation area in northwest China, ABAQUS software was applied to simulate the influence of the replacement of channel subsoil materials on the temperature and strain fields of the foundation by establishing a finite element model. The results show that: after the soil foundation in the frost-sensitive area of the channel is refilled with 30cm, 50cm and 70cm thick gravel and fine sand respectively, the frost deformation of the channel bank slope and foundation is obviously reduced, an the reduction effect of gravel on the frost deformation is better than that of fine sand; with the increase of the thickness of the refill, the reduction of frost deformation is also on a decreasing trend, and the influence of the channel subsoil refill on the temperature field of the foundation is smaller, but the subsoil will make the temperature field and strain field of the bank slope after the refill. After refilling, the frozen expansion displacement of the bank slope can be dissipated, which can significantly improve the deformation and stress concentration phenomenon on the channel seepage control lining structure. The research results can provide theoretical basis and technical support for the anti-freezing and expansion structural modification of channels in permafrost areas.

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.

Download article (PDF)

TY  - CONF
AU  - Dunzhe Qi
AU  - Hairuo Wang
AU  - Yan Wang
PY  - 2024
DA  - 2024/04/24
TI  - Effect of Subsoil Replacement in Frost-Sensitive Areas on the Frost Deformation of Channel
BT  - Proceedings of the 2023 5th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2023)
PB  - Atlantis Press
SP  - 684
EP  - 698
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-398-6_67
DO  - 10.2991/978-94-6463-398-6_67
ID  - Qi2024
ER  -