Axisymmetric Simulations of Cone Penetration in Biocemented Sands

نویسندگان

چکیده

With the recent advances in biogeotechnics field and specifically microbially induced calcite precipitation (MICP), cone penetration testing (CPT) has become a valuable tool to overcome challenges associated with intact sampling of improved soils, evaluate spatial extent magnitude applied MICP treatment, assess consequential improvement engineering properties. Although CPT tip resistance (qc) can effectively monitor densified clean sands, no relationship exists estimate cementation strength parameters MICP-treated sands. This paper proposes between apparent cohesion (c) stemming from MICP-induced bonds at particle contacts change Δqc initially loose To develop broadly useful correlation, available experimental data biocemented soils were used guide computation simulations using direct axisymmetric model The numerical uses finite-difference method rezoning algorithm for large-deformation problems along Mohr-Coulomb constitutive model. sand was characterized by an elastic shear modulus informed shear-wave velocity measurements (Vs). correlation interest identified (c, qc, Vs), results validated against data. Once validated, extended different initial conditions, trends analyzed interpreted. Results are consistent show increase as level increases. is modeled through stiffness parameters, which both A linear proposed function confining stress.

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ژورنال

عنوان ژورنال: Journal of Geotechnical and Geoenvironmental Engineering

سال: 2022

ISSN: ['1943-5606', '1090-0241']

DOI: https://doi.org/10.1061/(asce)gt.1943-5606.0002914