Research on Laboratory Static Cone Penetration Test of Overlying Layer of Deep Sea Hydrate-Bearing Sediments

DOI

10.2991/978-94-6463-650-5_30How to use a DOI?

Keywords

Deep sea resources; Cone penetration test (CPT); Deep-sea geotechnical engineering; Mechanical properties; Soil classification

Abstract

The development of marine resources and deep-sea engineering construction is a crucial strategy for national security and sustainable development. However, the potential engineering geological hazards such as reservoir subsidence, wellbore instability, and submarine landslides during the extraction process necessitate precise pre-extraction analysis of reservoir characteristics. Cone Penetration Testing (CPT), an effective in-situ exploration technique, enables accurate analysis of soil types, soil layer boundaries, and physical-mechanical properties of deep-sea sediments and hydrate reservoirs by measuring penetration resistance, pore pressure changes, and other data. This study optimized the laboratory CPT testing method based on in-situ CPT tests conducted in deep-sea environments and validated it through experiments. It was found that for a 600mm-high specimen, the experimental data were most accurate when the penetration depth was between 300-400mm. An increase in the penetration rate led to an increase in both the cone tip resistance and the sidewall friction resistance. Furthermore, experiments conducted on South China Sea sediments under varying effective confining pressures demonstrated that an increase in effective confining pressure also augmented these resistance values. Based on these experimental results, this study preliminarily established empirical formulas for laboratory CPT experiments on deep-sea sediments, providing a scientific basis for reservoir safety assessments in deep-sea geotechnical engineering.

Copyright

© 2025 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  - Shi Shen
AU  - Rui Qin
AU  - Haihong Chen
AU  - Ting Huang
AU  - Yang Ge
AU  - Xin Lv
AU  - Huiyong Liang
PY  - 2025
DA  - 2025/01/31
TI  - Research on Laboratory Static Cone Penetration Test of Overlying Layer of Deep Sea Hydrate-Bearing Sediments
BT  - Proceedings of the 2024 7th International Conference on Civil Architecture, Hydropower and Engineering Management (CAHEM 2024)
PB  - Atlantis Press
SP  - 286
EP  - 298
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-650-5_30
DO  - 10.2991/978-94-6463-650-5_30
ID  - Shen2025
ER  -