Influence of tension cracks on moisture infiltration in loess slopes under high-intensity rainfall conditions

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Фев. 6, 2025

Loess slopes with steep gradients are particularly prone to vertical tension cracks at the crest, resulting from unloading and other factors. These significantly affect spatiotemporal distribution of moisture infiltration during rainfall, potentially leading slope instability. This study investigates impact crest-tension on in loess under extreme rainfall conditions, focusing crack position, depth, width. Soil content dynamics wetting fronts were monitored assess how these influence patterns. The results indicate that crest act as preferential pathways, causing water retention within forming a "U-shaped" zone. extent this front is influenced by crack's width, proximity shoulder; wider, deeper closer shoulder result more pronounced front. Over time, persists, decreases, patterns begin resemble those homogeneous slopes. In both cases, exhibit intersecting patterns: one parallel surface. During initial stages migration speed was higher than However, after prolonged speeds scenarios converged. A strong linear correlation observed between average depth horizontal surface, for types. findings deepen our understanding cracks, providing insights developing effective hazard mitigation strategies.

Язык: Английский

Shear strength parameters identification of loess interface based on borehole micro static cone penetration system

Geoenvironmental Disasters, Год журнала: 2024, Номер 11(1)

Опубликована: Авг. 21, 2024

Abstract Background Loess is prone to large deformation and flow slide due natural artificial interfaces inside. The strength of these controls the mechanical properties loess. Obtaining their parameters through in-situ testing essential for evaluating stability in loess engineering with interfaces. Methods By developing a borehole micro static cone penetration system creating various types interfaces, extensive model tests were conducted observe changes tip resistance during penetration. response surface method was used analyze impact test conditions on calculated resistance. A three-dimensional fitting employed establish relationship between shear parameters, which validated testing. Results developed achieves overall miniaturization while providing significant power ensuring an effective distance. Cone development can be divided into three stages: initial, rapid increase, slow increase. transition times stages vary different soils. Calculated positively correlated dry density normal stress negatively water content. quadratic positive correlation established In composite soils, interaction content strong. Compared intact soil samples, soils are more prominently influenced by Conclusion interface innovatively developed, fulfilling need obtain deep soil. This study provide support long-term slope or subgrade

Язык: Английский

Investigation of tensile strength and deformation behaviors of basalt fiber-reinforced loess subjected to dry-wet cycles

Bulletin of Engineering Geology and the Environment, Год журнала: 2024, Номер 84(1)

Опубликована: Дек. 4, 2024

Язык: Английский