Time-Varying Reliability Analysis of the Majiagou Landslide DOI Open Access

Chun Lan,

Hui Zhang, Guangqing Hu

и другие.

Water, Год журнала: 2025, Номер 17(8), С. 1185 - 1185

Опубликована: Апрель 15, 2025

Rainfall and reservoir water level (RWL) fluctuations are the most important factors affecting landslide stability. Although extensive research has explored stability under combined effect of rainfall RWL fluctuation, quantitative investigations on individual contributions fluctuation to limited. To address this issue, taking Majiagou in Three Gorges Region (TGR) as an example, seepage field was simulated analyzed three different scenarios: rainfall; fluctuation; fluctuation. The corresponding condition scenarios evaluated. results show that is critical factor governs landslide. Specifically, when drops rapidly from 165 m 145 m, with average rate 0.859 m/d, safety decreases significantly. reason rapid decline creates outward-directed forces promote slope deformation. In contrast, a limited stability, only decreasing exceeds 50 mm/d. This because force directed outward develops reaches certain threshold, leading reduction slope’s factor. addition, study reveals generates synergistic amplification mechanism. variation hydrological conditions significantly arithmetic sum rainfall-induced RWL-induced variation. helps us understand how affect by altering field, which crucial for preventing landslides.

Язык: Английский

Revisiting spatiotemporal evolution process and mechanism of a giant reservoir landslide during weather extremes DOI
孝 河野, Hong‐Hu Zhu,

Feng-Nian Chang

и другие.

Engineering Geology, Год журнала: 2024, Номер 332, С. 107480 - 107480

Опубликована: Март 21, 2024

Язык: Английский

Процитировано

38

Clogging and Unclogging of Fine Particles in Porous Media: Micromechanical Insights From an Analog Pore System DOI Creative Commons
Yanzhou Yin, Yifei Cui, Lü Jing

и другие.

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

A method for monitoring of monopile horizontal displacement of offshore wind turbine based on UWFBG and boundary reconstruction DOI
Heming Han,

Zhihao Meng,

Bin Shi

и другие.

Measurement, Год журнала: 2025, Номер unknown, С. 117384 - 117384

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

4

Behaviour of pile-anchor reinforced landslides under varying water level, rainfall, and thrust load: Insight from physical modelling DOI
Chengtang Wang, Hao Wang,

Weimin Qin

и другие.

Engineering Geology, Год журнала: 2023, Номер 325, С. 107293 - 107293

Опубликована: Сен. 20, 2023

Язык: Английский

Процитировано

40

Thermo-hydro-poro-mechanical responses of a reservoir-induced landslide tracked by high-resolution fiber optic sensing nerves DOI Creative Commons
孝 河野, Hong‐Hu Zhu, Gang Cheng

и другие.

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

Probing multi-physical process and deformation mechanism of a large-scale landslide using integrated dual-source monitoring DOI Creative Commons
Hong‐Hu Zhu, 孝 河野, Huafu Pei

и другие.

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

Numerical Analysis of Anti-Slide Pile Reinforcement for Slope Stability Under Rainfall Conditions DOI Creative Commons

Zhongyi Wen,

Weiyuan Xu,

Bingxiang Yuan

и другие.

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

Performance evaluation of distributed strain sensing nerves for monitoring ground collapse: A laboratory study DOI
Yuxin Gao, Hong‐Hu Zhu,

Chao Wei

и другие.

Measurement, Год журнала: 2023, Номер 217, С. 113100 - 113100

Опубликована: Май 24, 2023

Язык: Английский

Процитировано

13

Hybrid response surface method for system reliability analysis of pile-reinforced slopes DOI Creative Commons
Xiangrui Duan, Jie Zhang, Leilei Liu

и другие.

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

Landslide model tests with a miniature 2D principal stress sensor DOI Creative Commons
Kun Fang,

Yulei Fu,

Huiming Tang

и другие.

Journal of Rock Mechanics and Geotechnical Engineering, Год журнала: 2024, Номер unknown

Опубликована: Апрель 1, 2024

Understanding the stress distribution derived from monitoring principal (PS) in slopes is of great importance. In this study, a miniature sensor for quantifying two-dimensional (2D) PS landslide model tests proposed. The fundamental principle and design are demonstrated. comprises three earth pressure gages one gyroscope, with utilization three-dimensional (3D) printing technology. difficulties installation location during preparation rotation testing can be effectively overcome using sensor. Two different arrangements sensors tested verification tests. Additionally, application an excavated-induced slope tested. results demonstrate that exhibits commendable performance achieves desirable level accuracy, angle error ±5° transformation model, generated by excavation, demonstrated test two (MPS) sensors. has significant potential measuring primary other geotechnical experiments.

Язык: Английский

Процитировано

5