Improving the Hydrodynamic Performance of Jet Grouting with Chemical Additives

Spagnoli, Giovanni; Modoni, Giuseppe; Arciero, Michela; Salvatore, Erminio

doi:10.1007/s40891-021-00345-z

Cited by 13 publications

(2 citation statements)

References 15 publications

(22 reference statements)

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“…The jet grouting column technique is a popular foundation improvement approach [1][2][3] and is extensively employed in slope stabilization, 4,5 cut-off walls, 6,7 the pre-treatment of tunneling, 8,9 and so forth. The equipment is flexible, and the column shape is easily controlled.…”

Section: Introductionmentioning

confidence: 99%

Modeling diameter of jet grouting columns using Bayesian framework

Zhao,

Chen,

Wang

2023

Num Anal Meth Geomechanics

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This study proposes a new model in explicit form to predict the diameter of the jet grouting column of three popular jet grouting systems (i.e., single, double, and triple). The proposed model can quantify the uncertainty associated with the prediction. Bayesian model selection was used to determine the optimal models and, the bootstrap sampling method was adopted to avoid bias in the collected database. The predictions agree well with the measured data, and the 95% credible intervals can cover almost all the measured data on the testing dataset, which indicates the robustness of the proposed model. A simple formula combined with a table was established to facilitate the engineers in applying the proposed model. The results reveal that soil type has a significant impact on diameter prediction. Uncertainty quantification can reveal possible fluctuations in column diameter and is vital to get a cost‐efficient design.

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Section: Introductionmentioning

confidence: 99%

Modeling diameter of jet grouting columns using Bayesian framework

Zhao,

Chen,

Wang

2023

Num Anal Meth Geomechanics

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“…The MJS method has the advantages of omni-directional, high-pressure jet grouting construction; high-quality, large-diameter piles; low impact on the environment; and low mud pollution. The MJS method has the significant advantages of all-round high-pressure jet grouting construction, high quality with large pile diameter, a small impact on the surrounding environment, and low mud pollution and has been massively applied in various underground engineering construction scenarios [26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis and Safety Factors of the Excavation Face of a Pipe Screen Tunnel in a Soft Soil Area

Pan,

Wang,

Diao

et al. 2023

Applied Sciences

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With the rapid development of urban rail transit and underground space construction, the advantages of the concealed excavation method are gradually highlighted in the urban center area affected by a complex engineering environment. At present, the pipe curtain method with a flexible section and wide application of the soil layer is being widely used in engineering, but the research on the stability of the excavation face during the construction of the pipe curtain method in soft soil areas still has not formed a complete system. Therefore, this paper analyzes the stability of the excavation face under different reinforcement conditions and the influence of different spacing, numbers, and strength of MJS (metro jet system) zones on the stability of the excavation face of the pipe curtain method based on the actual project of the Guiqiao Road Station of the Shanghai Metro, China, and gives a reference for the reinforcement of the palm face in the excavation process of the pipe curtain method in soft soil areas. The study shows that the safety coefficient of the excavation face decreases with the increase in the slope angle of the excavation face, with the increase in spacing of the MJS zone, and with the increase in height of the MJS zone arrangement, while the safety coefficient of the excavation face increases with the increase in strength of the MJS zones themselves and the increase in the strength of the soil between the MJS zones. Further, the machine learning model is applied to predict the stability of the excavation face under different cases, and the relevant fitting accuracy is above 0.9, which can predict the stability of the excavation better.

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