Application of a novel grouting material for prereinforcement of shield tunnelling adjacent to existing piles in a soft soil area

Wu, Tianhua; Gao, Yongtao; Zhou, Yu

doi:10.1016/j.tust.2022.104646

Cited by 21 publications

(5 citation statements)

References 48 publications

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“…However, due to inaccurate control issues and lack of strength, the utilization range of cement slurry is restricted [181]. The chemical slurry uses grouting materials such as polyurethane and epoxy resin with a regulated setting time and good permeability for a variety of applications, although they are more expensive [182,183].…”

Section: Grouting Retrofittingmentioning

confidence: 99%

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Tunnel lining detection and retrofitting

Jiang

Wang

Zhang

et al. 2023

Automation in Construction

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Section: Grouting Retrofittingmentioning

confidence: 99%

“…Grouting [168][169][170][171][172][173][174][175][176][177][178][179][180][181][182][183][184] Deformation Cracks Voids Leakage…”

Section: Deformation Cracks Leakageunclassified

Tunnel lining detection and retrofitting

Jiang

Wang

Zhang

et al. 2023

Automation in Construction

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“…With the rapid development of big data and artificial intelligence technology in recent years, deep learning algorithms such as big data statistical analysis (Sekiya et al, 2022;Wu et al, 2022), BP neural network (Zhou et al, 2015;Cachim and Bezuijen, 2019;Wang et al, 2022a), genetic algorithm (GA) (Ahangari et al, 2015), support vector machine (SVM) (Wang et al, 2013;Wang et al, 2022b), random forest (RF) (Zhou et al, 2017;Ge et al, 2022), particle swarm optimization (PSO) (Liu et al, 2018;Elbaz et al, 2022) have been applied in the prediction of shield tunneling parameters. The rudiment of the concept of deep learning is the deep belief network (DBN) proposed by Hinton in 2006.…”

Section: Open Accessmentioning

confidence: 99%

Prediction method of shield tunneling parameters in pebble stratum formed by weathered granite and quartzite

Wang

Zhao

et al. 2023

Front. Earth Sci.

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The pebble formation formed by weathered quartzite and granite is usually of high strength, strong permeability and poor self stability, which brings great difficulties to shield tunneling. It is necessary to adjust the tunneling parameters at any time to prevent the consequences of instability of the tunnel face, loss of stratum and surface settlement caused by the imbalance of the soil bin pressure. GA algorithm is embedded into PSO algorithm for parameter optimization, and grey theory is combined to establish the prediction model of soil chamber pressure based on grey least square support vector machine, which can solve the problem of difficult control of tunneling parameters in pebble stratum formed by weathered quartzite and granite. Research indicates: GA-PSO-GLSSVM chamber Earth pressure prediction model enhances the EPB chamber Earth pressure forecast accuracy in complicated strata by integrating the global search capability of the GA algorithm, the quick convergence of the PSO algorithm, and the anti-disturbance capability of the GM model. The GA-PSO-GLSSVM model has high goodness-of-fit and accuracy compared with other prediction models. This model can successfully prevent the a series of undesirable consequences such as destabilization of the palm surface, missing strata and settlement due to ground surface due to pressure imbalance in the soil chamber pressure. The research results can provide reference for EPB shield tunneling parameter control in Grade V surrounding rock.

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“…Nowadays, the need for new excavations has increased with the expansion of urbanization and the increase in utilizing urban rail transportation, especially the subway. Meanwhile, tunneling with a Tunnel Boring Machine (TBM) has become popular due to its advantages, such as high mechanization, safety, and environmental compatibility [1].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Feasibility of Increasing the Tail-grouting Zone during Mechanized Tunneling in Sandy Soils

Barri,

Chakeri,

Haghkish

et al. 2023

Period. Polytech. Civil Eng.

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Nowadays, excavation in urban environments can have many risks; one of these hazards is improper tail-grouting of Earth Pressure Balance Machine (EPBM) and the consequent ground surface settlement. Failure to fill the tail space with suitable grout significantly affects the surface displacements. Injecting more grout to penetrate deeper around the tunnel will play a more effective role in reducing displacements and permeability of the soil. Therefore, experimentally investigation of the feasibility of increasing the tail-grouting zone during excavation around the tunnel space and the effect of this penetration on the amount of ground surface displacements is the main purpose of this paper. Thus, experimental tests were performed with different grout injection pressure and the effect of each of the pressure on the penetration depth of grout into the soil new laboratory model were examined. Then to study the effect of the grout penetration depth on surface settlement to determination of the adequate amount of grout injection pressure a numerical modeling of Tabriz metro line 2 by FLAC3D software were completed. For this purpose, the results of the laboratory tests (the penetration depth of grout) were used in numerical modeling. The results indicated that the amount of penetration in the implemented granulation has increased due to the increase in pressure, so doubling the pressure causes a 30% increase in grout penetration in the surrounding soil. The results of numerical studies showed that increasing the range of injection in the modeling causes a significant reduction (80 percent) in the ground surface settlement.

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Application of a novel grouting material for prereinforcement of shield tunnelling adjacent to existing piles in a soft soil area

Cited by 21 publications

References 48 publications

Tunnel lining detection and retrofitting

Tunnel lining detection and retrofitting

Prediction method of shield tunneling parameters in pebble stratum formed by weathered granite and quartzite

Investigation of the Feasibility of Increasing the Tail-grouting Zone during Mechanized Tunneling in Sandy Soils

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