Improvement of an Undisturbed Peat Soil with Jet Grout Columns: Physical and Numerical Modeling

Yalçın, H.; Kaya, Zülküf; Çadır, Cenk Cuma; Uncuoğlu, Erdal; Erol, Aykut; Akın, Müge K.

doi:10.1007/s13369-023-08052-9

Arab J Sci Eng

2023

DOI: 10.1007/s13369-023-08052-9

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Improvement of an Undisturbed Peat Soil with Jet Grout Columns: Physical and Numerical Modeling

H. Yalçın

Zülküf Kaya

Cenk Cuma Çadır

et al.

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2024

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Correction effect of jet-grouting on high-speed railway subgrade lateral deformation

Bai,

Xiao,

Xue

et al. 2024

Proceedings of the Institution of Civil Engineers - Geotechnica

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Viable remediation of the large lateral deformation of high-speed railway (HSR) subgrades, especially in soft soil areas, is still absent. An integrated rectification scheme of high-pressure jet-grouting (HPJG) combined with stress-release techniques was conducted to rectify the large lateral deformation of an operational HSR subgrade in the soft soil area of China, but without the refined design and mechanical analysis before rectification due to the emergency. The objective of the study is to post-evaluate the rectification effects utilizing field monitoring data and numerical calculations. The monitoring data showed that the maximum lateral deviation of the subgrade was 69.1 mm, which almost met the expected correction requirements. However, the influence of the excess pore water pressure (EPWP) dissipation on the correction deviation was not considered in the scheme. Therefore, a numerical model was established to further investigate this effect and corresponding mitigation methods. The calculated results revealed that EPWP in the foundation dissipated mostly within six months after rectification, and the deformation loss accounted for 30.7% of the total deviation. Prolonging the interval of two-row pile construction can be a plausible approach to mitigate the deviation loss. The findings provide a feasible method for correcting large lateral deformation of HSR subgrades.

show abstract

Correction effect of jet-grouting on high-speed railway subgrade lateral deformation

Bai,

Xiao,

Xue

et al. 2024

Proceedings of the Institution of Civil Engineers - Geotechnica

View full text Add to dashboard Cite

show abstract

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Improvement of an Undisturbed Peat Soil with Jet Grout Columns: Physical and Numerical Modeling

Cited by 1 publication

References 30 publications

Correction effect of jet-grouting on high-speed railway subgrade lateral deformation

Correction effect of jet-grouting on high-speed railway subgrade lateral deformation

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