What question did this study set out to answer?

Investigate the shear strength behavior and underlying micromechanical void mechanisms of sand conditioned with an environmentally friendly bubble–slurry under varying vertical pressures.

February 18, 2025KSCE Journal of Civil EngineeringOpen Access

Shear strength of bubble–slurry-conditioned sand under total vertical pressure based on void characteristics

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Authors

LWLu WangHohai University WZWei ZhuZhejiang Sci-Tech University FMFanlu MinHohai University

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Implication

Experimental testing reveals pressure-driven shear strength transitions in bubble-slurry-conditioned sand, highlighting optimized excavation mechanisms for earth pressure balance tunneling.

Key Points

Investigate the shear strength behavior and underlying micromechanical void mechanisms of sand conditioned with an environmentally friendly bubble–slurry under varying vertical pressures.
Conducted undrained shear tests on bubble–slurry-conditioned sand using a custom pressurized vane shear apparatus.
Evaluated mechanical response under applied vertical total pressures ranging from 0 to 300 kPa.
Strain softening in conditioned sand decreases systematically as vertical pressure increases from 0 to 300 kPa.
Increasing vertical pressure shifts the void ratio from above the maximum void ratio (emax) of unconditioned sand to below emax, transitioning shear strength control from bubble–slurry cohesion to sand internal friction.
Elevated pressure increases both the shear stress required for bubble splitting and the resistance against bubble migration through sand pores, driving higher overall shear strength.

Cite This Study

Wang et al. (2025) studied this question.

synapsesocial.com/papers/6a7fb96e0728012cca785481 https://doi.org/10.1016/j.kscej.2025.100201

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Implication

Experimental testing reveals pressure-driven shear strength transitions in bubble-slurry-conditioned sand, highlighting optimized excavation mechanisms for earth pressure balance tunneling.

Shear strength of bubble–slurry-conditioned sand under total vertical pressure based on void characteristics

Discussion

Member takes

Implication

Key Points

Cite This Study

Shear strength of bubble–slurry-conditioned sand under total vertical pressure based on void characteristics

Discussion

Member takes

Implication

Key Points

Cite This Study

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