Experimental study on degree of match between slurry and ground based on particle retention rate

Lin, Yufeng; Fang, Yong; He, Chuan; Wang, Wei

doi:10.1016/j.tust.2021.104105

Cited by 11 publications

(2 citation statements)

References 24 publications

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“…Talmon et al [25] in addition to other researchers [14,15,26] identified two distinct stages of the invasion of pressurised slurry at the front of the shield: the mud spurt and the filter cake formation. The amounts of displaced water in the initial mud spurt and the subsequent filter cake formation were proportional to the square root of time.…”

Section: Discharged Water and Infiltration Samplementioning

confidence: 94%

Infiltration behaviour and microstructure of filter cake from sand-modified bentonite slurry

Qin

Zhou

et al. 2023

Transportation Geotechnics

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Section: Discharged Water and Infiltration Samplementioning

confidence: 94%

Infiltration behaviour and microstructure of filter cake from sand-modified bentonite slurry

Qin

Zhou

et al. 2023

Transportation Geotechnics

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“…The slurry proportion was shown to have a remarkable effect on the stability of the excavation face-the greater the bentonite concentration was, the lower the permeability of the sand and filter cake were. Lin et al [33] considered the clogging behavior of the slurry particles and the filtering ability of the ground, and the particle retention rate was proposed to evaluate the degree of matching between the slurry and the ground. Mao et al [34] established a constant pressure slurry permeation cake model of a slurry shield excavation face in sandy stratum and analyzed the effects of the permeation time, slurry concentration, slurry pressure, and initial stratum porosity on filter cake formation.…”

Section: Figurementioning

confidence: 99%

Experimental Study on the Characteristics and Formation Mechanism of Dynamic Filter Cake for Slurry Shield Tunneling

et al. 2022

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The key to guaranteeing excavation face stability in slurry shield tunneling is the formation of an impermeable dynamic filter cake. At the same time, the effect of the cutter head and rotation speed should be taken into account. We studied the characteristics and formation mechanism of the dynamic filter cake using a newly developed experimental apparatus. The experiment results show that the hysteretic infiltration zone appeared in the curves of stepped loading filtration while the cutter head was rotating, and the volume of water filtration increased by 11.2% compared to when the cutter head stopped. The higher the rotation speed was, the lower the conversion rate of the effective stress was. Under the same rotation speed, the formation time of the 6-cutter arm was almost 5 s slower than that of the 5-cutter arm. As the cutter arms and the rotation speed increased, the stratum’s electrical conductivity increased and stabilized at a distance of 20 cm from the cutter head. The filter cake transited from ‘filter cake plus an infiltration zone’ to ‘an infiltration zone without a filter cake’ with the increase of the rotation speed. The thickness of the dynamic filter cake was smaller than that of the static filter cake, the thickness of 10 groups decreased significantly, and the average thickness decreased by 76.15% at 1.0 rpm. The mesoscopic formation process of the dynamic filter cake can be divided into six stages. This study revealed the slurry penetration mechanism and filter cake characteristics present under cyclic damage by the shield cutter head to the filter cake and soil and provided theoretical support on how to maintain the stability of the excavation face during slurry shield tunneling.

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Investigations of filter-clog mechanism and prediction model of slurry penetration during slurry pressure transfer

Lin

Fang

2023

Acta Geotech.

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Experimental study on degree of match between slurry and ground based on particle retention rate

Cited by 11 publications

References 24 publications

Infiltration behaviour and microstructure of filter cake from sand-modified bentonite slurry

Infiltration behaviour and microstructure of filter cake from sand-modified bentonite slurry

Experimental Study on the Characteristics and Formation Mechanism of Dynamic Filter Cake for Slurry Shield Tunneling

Investigations of filter-clog mechanism and prediction model of slurry penetration during slurry pressure transfer

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