Influence of fines on the monotonic and cyclic shear behaviour of volcanic soil “Shirasu”

Hyodo, Taichi; Wu, Yang; Hyodo, Masayuki

doi:10.1016/j.enggeo.2022.106591

Cited by 14 publications

(5 citation statements)

References 62 publications

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“…However, the special honeycomb pore structure also has a significant impact on the strength and deformation of the soil. Therefore, future work can focus on the effect of fines content on the mechanical behavior of composite soil [25][26][27].…”

Section: Discussionmentioning

confidence: 99%

Effect of Fines Content on Pore Distribution of Sand/Clay Composite Soil

Wang¹,

Chen

et al. 2023

Sustainability

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Plant sand fixation is the most durable and environmentally friendly sand mitigation measure for windblown sand hazards. For aeolian–sand composite soil, the fines content is the main factor affecting the pore size distribution characteristics and determines the soil water retention characteristics. Sandy soil with uniform particle size was used as the material, low-plasticity clay as a fine particle, and composite soils with different fines content were prepared. The evolution of the pore size distribution of composite soils was quantitatively determined using low-field nuclear magnetic resonance technology, and the influence of the fines content on the pore size distribution was obtained. The results show that as the fines content increases, the pore size first increases and then decreases. The pore size distribution curve gradually changes from a single-peak structure to a double-peak structure and becomes a unimodal structure again. The corresponding dominant pore size of composite soils increases first and then decreases with the increase in the fines content. A critical fine particle content is identified to control the strong local honeycomb pore structure of composite soils, which provides a theoretical basis for the material selection and design of plant sand fixation measures.

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Section: Discussionmentioning

confidence: 99%

Effect of Fines Content on Pore Distribution of Sand/Clay Composite Soil

Wang¹,

Chen

et al. 2023

Sustainability

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“…According to the 30% moisture content, the water will be sprayed evenly on the soil and thoroughly mixed before being placed in a bag and sealed for several hours to ensure uniform moisture content. In accordance with the geotechnical test specification and previous studies [36][37][38], the prepared test soil was loaded into the ring knife. Since the roadbed should be more than 90% compacted, the dry density of its straight shear sample is 1.395 g/cm 3 .…”

Section: Methodsmentioning

confidence: 99%

Study of Ion Adsorption and Shear Strength of Red Clay under Leaching Action

Song

Geng

et al. 2023

Sustainability

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To study the soil-water effect of red clay, a leaching test is conducted by loading red clay into a soil column and collecting the leaching waste liquid periodically for analysis of the ion content and conductivity changes in the leaching waste liquid. After leaching and filtering, the soil is removed from the column and reconstituted as a straight-shear specimen for a straight-shear test. Ca2+, Mg2+, and SO42- ions increased and then stabilized in water samples as leaching time increased, while Na+, Cl-, and NO3- declined and then stabilized. Due to their presence in the leaching solution, Ca2+, Mg2+, and SO42-ions are initially adsorbed by the soil and then saturated by adsorption. In contrast, Na+, Cl-, and NO3−precipitate out of the soil due to the dissolution and ion exchange of the soil sample, thereby weakening their effects. Consequently, these ions appear to vary in various ways. The relationship between ion content in solution and conductivity has also been discovere, and the conductivity varies with the total ion charge in the solution. The angle of internal friction decreases as the leaching time increases, but the cohesion of the soil increases.

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“…When μ t is greater than 0.5, the corresponding calculations can also be performed and do not cause the singularity of the stiffness matrix, so that the proposed model has more extensive adaptability. 5 Geofluids limitations because some test curves do not necessarily conform to the hyperbolic function [13]. For example, for a test curve of the volumetric strain and axial strain with a dilatancy characteristic, the hyperbolic equation does not fit very well.…”

Section: Parameter Determination Of Thementioning

confidence: 99%

Multipotential Surface Elastoplastic Constitutive Model and Its Application in the Analysis of the Phase II Cofferdam of the Three Gorges Project

Wen

Yang

Zhong³

2023

Geofluids

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Based on multipotential surface theory, an elastoplastic constitutive model is established in this paper. The required parameters of the proposed model are the same as those of the Duncan-Chang model, and the proposed model is no longer restricted by the generalized form of Hooke’s law. In addition, the proposed model uses a numerical method to fit the test curves to determine the required parameters. The calculation program of the proposed model is also developed by FLAC3D, and according to the comparison with the triaxial test results of gravel and the stress and deformation analysis of the phase II cofferdam of the Three Gorges Project, the rationality and superiority of the proposed model are verified.

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Influence of fines on the monotonic and cyclic shear behaviour of volcanic soil “Shirasu”

Cited by 14 publications

References 62 publications

Effect of Fines Content on Pore Distribution of Sand/Clay Composite Soil

Effect of Fines Content on Pore Distribution of Sand/Clay Composite Soil

Study of Ion Adsorption and Shear Strength of Red Clay under Leaching Action

Multipotential Surface Elastoplastic Constitutive Model and Its Application in the Analysis of the Phase II Cofferdam of the Three Gorges Project

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