Inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migration DOI Creative Commons

Junjie Xuan,

Ming Li, Yaohui Du

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: May 21, 2025

Abstract In this study, the Tuanjie Tunnel project on Tongwei-Dingxi Expressway is utilized to investigate stress-seepage coupling in loess tunnels. Field monitoring, laboratory experiments, and numerical simulations were employed establish a coupled model of field for shallow-buried sections these The seepage-stress interactions tunnels analyzed, revealing variations pore water pressure around tunnel deformation behavior surrounding rock during construction, with particular attention effects migration.The results indicate that when groundwater level 10 m from crown, at various measurement points follows an order invert > arch springing waist haunch crown. Within pipe roof reinforcement zone, increases distance perimeter, while above it decreases distance. When considering migration, excavation upper bench significantly impacts vertical effective stress each point, middle wall haunch, lower arch.Based insights, addressing challenges encountered construction water-rich tunnels, implementation measures has played positive role enhancing stability construction.

Language: Английский

Environmental Assessment For Mapping Land Degradation and Lands Changes Using Remotely Sensed Data with Geospatial Analysis DOI Open Access

Ghaidaa Saba Yousef,

Hayder Dibs, Ahmed Samir Naje

et al.

International Journal of Computational and Experimental Science and Engineering, Journal Year: 2025, Volume and Issue: 11(1)

Published: Feb. 26, 2025

Lands degradation is one of the problems that facing humanity throughout world as well abandonment farming on their lands by farmers, in addition to fragmentation most orchards and agricultural fields conversion into residential areas, has a negative impact Economic, Environmental Social (Reduced Agricultural Productivity, Economic Loss, Soil Degradation, productivity. Water Scarcity, Biodiversity Rural-Urban Migration, Food Security, Conflict Instability). However, Karbala Province, Iraq, Agriculture are this dilemma since 2003. Therefore, order start solving problem and, it important detect all changes study area then put recommendations for overcoming dilemma. The aim monitor LCLU reasons behind that. For that, Authors employed pixel based classification techniques (Maximum Likelihood Method) four Landsat satellite (9 ,7 ETM+, TM5, TM4) images acquired at intervals (1990, 2000, 2010, 2023). first step research applied pre-processing stages (radiometric geometric corrections) correct images, secondly, processing stage (layer stacking, sub-setting) corrected classified using supervise six regions. results show desertification markedly intensified city last three decades. In 2023, water volume, decreased 14.21%, both Urban dark soil increased 3.05%, 8.63% respectively, give indicator about what happen area, evidences land processes was seen, mostly due Human activities such urban expansion unsustainable use practices. confusion matrix evaluate results. overall accuracy kappa statistic were above 90% 0.90 respectively.

Language: Английский

Citations

1
Investigation of effect capillary fringe in seepage characteristics of only saturated and unsaturated-saturated materials used in earthen dams DOI

Samin Pourghani,

Farzin Salmasi, Bahram Nourani

et al.

ISH Journal of Hydraulic Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 15

Published: Feb. 15, 2025

Language: Английский

Citations

0
Commingling of 2-D Darcian seepage with pipe flow: the Polubarinova-Kochina –Chanson problem revisited DOI
Shahad Al‐Yaqoubi, A. R. Kacimov, Ali Al‐Maktoumi

et al.

International Journal of Geotechnical Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 12

Published: March 23, 2025

Toe drains in earth dams intercept seepage and convey water through a perpendicular pipe. This study investigates commingled flow at contrasting Reynolds numbers using sand tank (ST) experiments HYDRUS2D modeling. In ST, the rate, Q, bottom outlet (orifice) connected to valved-pipe is discharged into measuring burette. coupled flow, Darcian heads rates depend on soil compartment size, hydraulic conductivity, pipe characteristics. The ST experiment found Q from orifice (STO) higher than by 63%. increases with shorter length. STO analytically modeled as Zhukovsky "slot drain." simulations show similar for an impermeable-lateral-boundary rather equipotential. An analytical 2D solution infinitely long gives nearly same rate model. These findings enhance understanding of Darcian-pipe flows aid efficient drainage design dams.

Language: Английский

Citations

0
Seepage Control, Detection, and Treatment in Embankment Dams: A State-of-the-Art Review DOI Creative Commons
Doaa A. El-Molla, Murat Kilit

Arabian Journal for Science and Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Language: Английский

Citations

0
Inverse analysis of surrounding rock parameters of loess tunnels and numerical simulation analysis of stress-seepage coupling under water migration DOI Creative Commons

Junjie Xuan,

Ming Li, Yaohui Du

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: May 21, 2025

Abstract In this study, the Tuanjie Tunnel project on Tongwei-Dingxi Expressway is utilized to investigate stress-seepage coupling in loess tunnels. Field monitoring, laboratory experiments, and numerical simulations were employed establish a coupled model of field for shallow-buried sections these The seepage-stress interactions tunnels analyzed, revealing variations pore water pressure around tunnel deformation behavior surrounding rock during construction, with particular attention effects migration.The results indicate that when groundwater level 10 m from crown, at various measurement points follows an order invert > arch springing waist haunch crown. Within pipe roof reinforcement zone, increases distance perimeter, while above it decreases distance. When considering migration, excavation upper bench significantly impacts vertical effective stress each point, middle wall haunch, lower arch.Based insights, addressing challenges encountered construction water-rich tunnels, implementation measures has played positive role enhancing stability construction.

Language: Английский

Citations

0