Experimental study on the influence of soluble salt content on unsaturated mechanical characteristics of undisturbed Ili loess

Niu, Lisi; Ren, Wenyuan; Zhang, Aijun; Wang, Yuguo; Liang, Zhichao; Han, Jingwen

doi:10.1007/s10064-021-02340-0

Cited by 11 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mineral composition analysis (XRD) was carried out after grinding the soil, and the results are shown in Table 2 . In addition, Lisi et al [ 36 ] and WANG et al [ 37 ] analyzed the soluble salt content of Yili loess. The analysis results are shown in Table 3 .…”

Section: Methodsmentioning

confidence: 99%

Investigation of Changes to Triaxial Shear Strength Parameters and Microstructure of Yili Loess with Drying–Wetting Cycles

et al. 2021

View full text Add to dashboard Cite

This research examined the drying–wetting cycles induced changes in undrained triaxial shear strength parameters and microstructural changes of Yili loess. The drying–wetting cycles were selected as 0, 1, 3, 5, 10, 20 and 30. Then, we collected Yili loess samples and performed unconsolidated-undrained (U-U) triaxial shearing tests to ascertain the variation in shear strength parameters with drying–wetting cycles. Additionally, we investigated the microstructural changes of Yili loess samples under drying–wetting cycles simultaneously via nuclear magnetic resonance (NMR) and scanning electron electroscopy (SEM). Finally, we established a grey correlation model between shear strength and microstructural parameters. Under U-U conditions, the prime finding was that the loess’s shear strength parameters changed overall after drying–wetting cycles; in particular, the internal friction angle φ dropped significantly while the cohesion c changed only slightly during cycles. For all the cycles, the first cycle gave the highest change. Soil morphology deterioration was evident at the initial stage of cycles. During the entire drying–wetting cyclic process, pore size distribution showed progressive variance from two-peak to a single-peak pattern, while both porosity and the fractal dimension of pores increased gradually towards stability. Soil particle morphology became slowly simple and reached the equilibrium state after 20 drying–wetting cycles. Under cyclic drying–wetting stress, the shear strength parameter changes were significantly correlated to microstructural modifications. This investigation was related to loess in the westerly region. The findings were expected to provide new insight into establishment of the connection between microstructure and macro stress–strain state of loess. To some extent, it provided a theoretical basis for the prevention and control of loess engineering geological disasters in Yili, Xinjiang and other areas with similar climate and soil types.

show abstract

Section: Methodsmentioning

confidence: 99%

Investigation of Changes to Triaxial Shear Strength Parameters and Microstructure of Yili Loess with Drying–Wetting Cycles

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In the study location, the soil samples' initial dry density was 1.34 g/cm 3 . Following drying, crushing, and sieving through a 2 mm screen, soil samples with 7.7%, 10.2%, 12.7%, and 15.2% mica content, respectively, were prepared.…”

Section: Compaction Testmentioning

confidence: 99%

“…The climatic conditions of the Yili River Valley are affected by variations in the North Atlantic Ocean. Large quantities of eolian loess is distributed on both banks of the Yili River in this area [3]. In recent decades, with increasing global warming, geological disasters, such as collapses and landslides, have occurred frequently in regions of permafrost and seasonal permafrost.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mica Content on Mechanical Properties of Yili River Valley Loess under the Impact of Freezing and Thawing

Zhang

Zhou³

et al. 2023

Sustainability

View full text Add to dashboard Cite

Natural disasters, including collapse, landslides, and debris flows, commonly occur in the Yili River Valley as a result of its distinctive terrain and climate. A large proportion of these are loess landslides. Hence, studying the mechanism of their occurrence is crucial. The loess in the Yili River Valley has a high mica content. By using freeze-thaw (FT) cycling tests, unconsolidated and undrained triaxial shear tests, and FT cycling experiments, the study clarifies the impact of mica content on the mechanical properties of the loess in the Yili River Valley under FT cycling conditions. The findings demonstrated that the loess’s shear strength was negatively impacted by both the mica content and freeze-thaw cycles (FTCs). Under the same FT cycle conditions, the shear strength of the Yili Valley loess decreased with an increase in the mica content, particularly during the first ten cycles. Cohesion represented the impact of the mica content on the shear strength parameters. The cohesion decreases as the mica content increases. After ten cycles, the values of the cohesion tended to become stable, while the internal friction angle showed the opposite trend. For the same mica content, the shear strength of the Yili valley loess decreased with the increase in the number of FTCs, while the cohesion decreased, and the internal friction angle first increased and then decreased. The study’s findings might offer a theoretical foundation for preventing and reducing loess landslides in the Yili River Valley caused by FTCs and high mica content.

show abstract

“…Today, world practice uses different methods and ways to eliminate collapsible properties of soils, including compaction, consolidation, and the use of soil cushions [13]. Methods such as onesolution silicification [14], thermal firing [15], and fiber [16] can be used to consolidate collapsible soils.…”

Section: Introductionmentioning

confidence: 99%

A Practical Solution for Improving Soil Bases Inproblematic Engineering Conditions

Tulebekova¹

2023

GEOMATE

View full text Add to dashboard Cite

Improving the quality and efficiency of construction on problematic soil conditions largely depends on the correct assessment of their properties, the choice of foundations, and structural and technological solutions. This study presents a practical solution for improving soil bases using reinforcement as the chosen method of improvement. The effectiveness of the reinforcing element was established experimentally, which made it possible to identify the peculiarities of changing strength and deformation properties of ground bases reinforced with geosynthetic material, as well as the possibility of modeling destructive soils using a "quasi-soil" approach. Analysis of the influence of reinforcing geosynthetic material proved its positive effect on the properties of the ground. The calculation of the coefficient of relative collapse after reinforcing became 0.03. Geosynthetic material is not subject to rotting, or root penetration, the structure of the material provides good strength and filtering properties. Thus, the use of geosynthetic materials allows the improvement of the mechanical properties of soils in a targeted way.

show abstract

Experimental study on the influence of soluble salt content on unsaturated mechanical characteristics of undisturbed Ili loess

Cited by 11 publications

References 34 publications

Investigation of Changes to Triaxial Shear Strength Parameters and Microstructure of Yili Loess with Drying–Wetting Cycles

Investigation of Changes to Triaxial Shear Strength Parameters and Microstructure of Yili Loess with Drying–Wetting Cycles

Effect of Mica Content on Mechanical Properties of Yili River Valley Loess under the Impact of Freezing and Thawing

A Practical Solution for Improving Soil Bases Inproblematic Engineering Conditions

Contact Info

Product

Resources

About