Key Factors for Deep Cement Mixing Construction for Undredged Offshore Land Reclamation
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 148, Issue 8
Abstract
Deep cement mixing (DCM) is an environmentally friendly technique for offshore ground improvement without dredging or much disturbance to the marine ecological system. Several field construction factors can influence the unconfined compressive strength (UCS) of cement-stabilized soil. In this study, key construction factors are evaluated referring to site investigation records, construction records, and quality test results of a large offshore DCM construction project. The key factors were attributed to geological conditions, construction procedures, and curing conditions. Specific field construction factors include fluctuations of tidal level, original soil type, volume fraction of injected water, volume fraction of injected cement slurry, injection rate of cement slurry, penetrating and mixing time per meter, curing age, and moisture content. The importance of these construction factors on the DCM strength has been quantified using a statistical method based on construction records. The injected water volume and original soil type are noted to be the two most dominant factors on the UCS of the treated soils. Longer mixing time improved the strength of the treated soils.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
The work presented in this paper was substantially supported by Eunsung O&C Offshore Marine and Construction (No. EUNSUNG19EG01).
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Journal of Geotechnical and Geoenvironmental Engineering
Volume 148 • Issue 8 • August 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Aug 22, 2021
Accepted: Apr 25, 2022
Published online: Jun 7, 2022
Published in print: Aug 1, 2022
Discussion open until: Nov 7, 2022
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- K.S. Yin, T. Xiao, H.Y. Luo, H.F. Zou, L.M. Zhang, Probabilistic modeling of offshore deep cement mixing improved ground, Computers and Geotechnics, 10.1016/j.compgeo.2023.105266, 156, (105266), (2023).