Study on constitutive model of stress elastic modulus of subgrade soil under different wet and dry conditions

DOI

10.2991/978-94-6463-336-8_72How to use a DOI?

Keywords

Water content; subgrade soil; resilience modulus; compactness; constitutive model

Abstract

In the process of highway construction, the compaction of subgrade soil is generally carried out under its best moisture content, which can ensure that the subgrade soil reaches the maximum dry density to provide sufficient bearing capacity. However, in the actual project, the moisture content of the subgrade soil after compaction will change due to many factors, which will have a great impact on its resilience modulus. In this paper, the dynamic triaxial modulus test method is adopted to carry out experimental research on a roadbed soil of a road project in Chongqing, to investigate the resilience modulus and its stress-dependent characteristics of the roadbed soil in different dry and wet states, and the results show that the resilience modulus of the roadbed soil increases with the increase of the compaction degree under the condition of the same water content; the resilience modulus of the air-dried specimen is significantly greater than that of the specimen with optimal water content, and the resilience modulus of the submerged specimen is greatly reduced. Therefore, the roadbed design of this project should control the compaction quality, do a good job of drainage, and guarantee the strength and stability of the roadbed.

Copyright

© 2023 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  - Xuehui Xing
AU  - Longming Zhang
AU  - Xingyu Zhang
PY  - 2023
DA  - 2023/12/30
TI  - Study on constitutive model of stress elastic modulus of subgrade soil under different wet and dry conditions
BT  - Proceedings of the 2023 9th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2023)
PB  - Atlantis Press
SP  - 622
EP  - 631
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-336-8_72
DO  - 10.2991/978-94-6463-336-8_72
ID  - Xing2023
ER  -