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Geomechanics and Engineering Volume 20, Number 4, February25 2020 , pages 313-322 DOI: https://doi.org/10.12989/gae.2020.20.4.313 |
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internal and interface shear strength; sand; gasoil; crude oil; used motor oil; relative density |
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Xiang-Hua Xu, Zhou-Chen Xiang, Jin-Feng Zou and Feng Wang
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| Abstract | ||
| This study focuses on a prediction approach of compaction compensation grouting efficiency in sandy soil. Based on Darcy\'s law, assuming that the grouting volume is equal to the volume of the compressed soil, a two-dimensional calculation model of the compaction compensation grouting efficiency was improved to three-dimensional, which established a dynamic relationship between the radius of the grout body and the grouting time. The effectiveness of this approach was verified by finite element analysis. The calculation results show that the grouting efficiency decreases with time and tends to be stable. Meanwhile, it also indicates that the decrease of grouting efficiency mainly occurs in the process of grouting and will continue to decline in a short time after the completion of grouting. The prediction three-dimensional model proposed in this paper effectively complements the dynamic relationship between grouting compaction radius and grouting time, which can more accurately evaluate the grouting efficiency. It is practically significant to ensure construction safety, control grouting process, and reduce the settlement induced by tunnel excavation. | ||
| Key Words | ||
| compensation grouting; grouting efficiency; filtration; sandy soils; soil settlement | ||
| Address | ||
| Xiang-Hua Xu: Guizhou Provincial Communications Department, No. 66, Yan\'an West Road,Guiyang, Guizhou Province, People\'s Republic of China Zhou-Chen Xiang, Jin-Feng Zou and Feng Wang: School of Civil Engineering, Central South University, No.22, Shaoshan South Road, Central South University Railway Campus, Changsha, Hunan Province, People\'s Republic of China | ||