Measurement, Год журнала: 2023, Номер 214, С. 112743 - 112743
Опубликована: Март 22, 2023
Язык: Английский
Engineering Geology, Год журнала: 2024, Номер 332, С. 107480 - 107480
Опубликована: Март 21, 2024
Язык: Английский
Процитировано
38
Water Resources Research, Год журнала: 2024, Номер 60(1)
Опубликована: Янв. 1, 2024
Abstract Pore clogging and unclogging in porous media are ubiquitous subsurface hydrologic processes, which have been studied extensively at various scales ranging from a single pore to porous‐medium samples. However, it remains unclear how fluid flow, particle rearrangement, the arching effect typical of cone‐shaped geometry interact they captured by pressure drop model macroscopic scale. Here, we investigate pore‐scale feedback mechanisms between flow using fully resolved fluid‐particle coupling approach (lattice Boltzmann method‐discrete element method). We first propose use truncated‐cone represent realistic geometries revealed X‐ray images prepared sand packing. Then, our simulations indicate that cone angle significantly influences associated with process enhancing contacts due arching. A modified Ergun equation is developed consider this geometric effect. At microscale, can be explained interparticle force statistics; few particles an arch (or dome) take majority hydrodynamic pressure. The maximum positively proportional Reynolds number negatively tangent angle. Finally, formula established utilizing characteristics compute maximal force. Our findings, especially accounts for resistance, provide guidance applying models large‐scale fines transportation issues, including seepage‐induced landslides, stream bank failure, groundwater recharge.
Язык: Английский
Процитировано
20
Measurement, Год журнала: 2025, Номер unknown, С. 117384 - 117384
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
4
Engineering Geology, Год журнала: 2023, Номер 325, С. 107293 - 107293
Опубликована: Сен. 20, 2023
Язык: Английский
Процитировано
40
Journal of Rock Mechanics and Geotechnical Engineering, Год журнала: 2023, Номер 16(3), С. 1018 - 1032
Опубликована: Май 18, 2023
Thermo-poro-mechanical responses along sliding zone/surface have been extensively studied. However, it has not recognized that the potential contribution of other crucial engineering geological interfaces beyond slip surface to progressive failure. Here, we aim investigate subsurface multi-physics reservoir landslides under two extreme hydrologic conditions (i.e. wet and dry), particularly within masses. Based on ultra-weak fiber Bragg grating (UWFBG) technology, employ special-purpose optic sensing cables can be implanted into boreholes as "nerves Earth" collect data soil temperature, water content, pore pressure, strain. The Xinpu landslide in middle reach Three Gorges Reservoir Area China was selected a case study establish paradigm for situ thermo-hydro-poro-mechanical monitoring. These UWFBG-based were vertically buried 31 m-deep borehole at foot landslide, with resolution 1 m except pressure sensor. We reported field measurements covering period 2021 2022 produced spatiotemporal profiles throughout borehole. Results show years are more likely motivate motions than dry years. annual thermally active layer critical depth roughly 9 might move downward warmer dynamic groundwater table is located depths 9–15 m, where peaked strain undergoes periodical response leap withdrawal hydrometeorological cycles. interface behaviors may support interpretation regulation slope stability, allowing us correlate them local damage events global destabilization. This paper also offers natural framework interpreting signatures from creeping bank slopes, which form basis monitoring early warning system.
Язык: Английский
Процитировано
35
Geoscience Frontiers, Год журнала: 2023, Номер 15(2), С. 101773 - 101773
Опубликована: Дек. 20, 2023
The implementation of isolated heterologous monitoring systems for spatially distant borehole deployments often comes with substantial equipment costs, which can limit the effectiveness geohazard mitigation and georisk management efforts. To address this, we have developed a novel system that integrates fiber Bragg grating (FBG) microelectromechanical (MEMS) techniques to capture soil moisture, temperature, sliding resistance, strain, surface tilt, deep-seated inclination. This enables real-time, simultaneous data acquisition cross-validation analyses, offering cost-effective solution critical parameters in geohazard-prone areas. We successfully applied this integrated Xinpu landslide, an active super-large landslide located Three Gorges Reservoir Area (TGRA) China. resulting strain profile confirmed presence two shallow secondary surfaces at depths approximately 7 m 12 m, respectively, addition depth ∼28 m. lower was activated by extreme precipitation, while upper one primarily driven significant changes reservoir water levels secondarily triggered concentrated rainfalls. Anti-slide piles remarkably reinforced moving masses but failed control ones. gap between pile heads amplified rainwater erosion effect, creating preferential channel infiltration. Multi-physical measurements revealed mixture seepage-driven buoyancy-driven behaviors within landslide. study offers dual-source multi-physical paradigm collaborative multiple crucial boreholes on large-scale contributes evaluation improvement engineering measures similar geological settings.
Язык: Английский
Процитировано
20
Bulletin of Engineering Geology and the Environment, Год журнала: 2025, Номер 84(2)
Опубликована: Янв. 21, 2025
Язык: Английский
Процитировано
1
Buildings, Год журнала: 2025, Номер 15(4), С. 638 - 638
Опубликована: Фев. 19, 2025
Rainfall-induced slope instability is a critical challenge in geotechnical engineering. This study investigates the reinforcement effect of anti-slide piles on stability under rainfall conditions using finite element numerical simulations, based project Youxi County, Fujian Province. The MIDAS GTS NX 2019(v1.2) software was employed to analyze effects pile arrangements safety factors, pore water pressure, displacement fields, and effectiveness. results showed that significantly enhanced by mitigating adverse rainfall, such as an increased pressure reduced soil strength. optimal achieved when were positioned middle sections slope, horizontal x-direction from 74.49 mm (without reinforcement) 7.42 mm, achieving reduction 90.0%, effectively reducing plastic strain zones. provides valuable insights into interaction mechanisms between soil, offering practical guidance for design strategies mitigate rainfall-induced failures.
Язык: Английский
Процитировано
1
Measurement, Год журнала: 2023, Номер 217, С. 113100 - 113100
Опубликована: Май 24, 2023
Язык: Английский
Процитировано
13
Journal of Rock Mechanics and Geotechnical Engineering, Год журнала: 2024, Номер 16(9), С. 3395 - 3406
Опубликована: Март 19, 2024
To consider the complex soil-structure interaction in a pile-slope system, it is necessary to analyze performance of systems based on three-dimensional (3D) numerical model. Reliability analysis system 3D modeling very challenging because computationally expensive and function pile failure mode only defined safe domain soil stability. In this paper, an efficient hybrid response surface method suggested study reliability pile-reinforced slopes, where support vector machine Kriging model are used approximate functions failure, respectively. The versatility illustrated detail with example. For example examined found that can significantly contribute reinforcement ratio effectively reduce probability failure. There exists critical beyond which not sensitive ratio. spacing affects both probabilities slope. optimal location length for stabilizing piles.
Язык: Английский
Процитировано
5