Assessment of frost heave in coarse-grained soil: a novel application of multi-strategy enhanced dung beetle-optimized KELM model

Earth Science Informatics, Год журнала: 2024, Номер 18(1)

Опубликована: Дек. 17, 2024

Язык: Английский

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Effects of poly‐γ‐glutamic acid on soil structure and water retention characteristics under dry‐wet cycles

Soil Use and Management, Год журнала: 2024, Номер 40(2)

Опубликована: Апрель 1, 2024

Abstract Poly‐γ‐glutamic acid (γ‐PGA) has been demonstrated to exhibit a soil water retention effect; however, the agricultural irrigation practices induce cyclic pattern of wetting and drying in soil, its synergistic interaction with γ‐PGA remains unclear. To explore amendment effects on pores structure, aggregates distribution, characteristics under dry‐wet cycles, an experiment was established number cycles (0, 2, 4, 8 times; single cycle involved reducing content from 80% 40% field capacity) addition rates (0%, 4%, 8%, represented by P0, P4, P8, respectively). The results indicated that enhanced structure distribution aggregates; especially, P8 exhibited remarkable increase pore 91.68% mean weight diameter 17.17%, compared P0. Additionally, higher capacity, P4 showing average increases 4.26% 12.58% saturated Notably, effect regulated cycles. had most significant improvement times optimal development four Therefore, these findings suggest approach enhance capacity is incorporating at concentration 0.8% conjunction 4–8

Язык: Английский

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Study on strength and constitutive model of frozen calcareous clay under multi-factor interaction

Frontiers in Earth Science, Год журнала: 2024, Номер 12

Опубликована: Ноя. 29, 2024

The investigation into the complex mechanical properties of frozen calcareous clay under multi-factor interaction holds significant importance for reliability and durability engineering in cold regions. This study investigates strength different levels by designing a four-factor, four-level orthogonal test that incorporates temperature, confining pressure, dry density, water content. aimed to assess sensitivity each factor failure stress, establish an intrinsic model based on Duncan-Chang considering results indicated stress-strain curves exhibit strain-hardening characteristics across various levels. These can be divided elastic elastic-plastic phases, with slope phase stress value at inflection point increasing decreasing temperature pressure. When pressure is maintained constant, negatively correlated temperature. positively Sensitivity analysis shows influence as follows: > density Additionally, markedly greater than content density. evolution unfrozen follows three stages: sharp reduction, rapid slow reduction. Verification against experimental data confirmed modified constitutive effectively reflects relationship multiple factors.

Язык: Английский

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Characteristics of pore size distribution in municipal waste contaminated clay based on soil-water characteristic curve

International Journal of Environmental Science and Technology, Год журнала: 2024, Номер unknown

Опубликована: Окт. 12, 2024

Язык: Английский

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