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- Title
地铁沿线地下水壅高规律及其对极端降雨事件的响应.
- Authors
王鑫; 潘明浩; 李虎; 左锐; 徐东辉; 何柱锟; 武子一; 徐云翔
- Abstract
Groundwater protection is one of the key aspects in the planning and construction of Jinan metro system. Due to the potential risk of groundwater level rising caused by the blocking effect of metro engineering structures on groundwater flow, it is necessary to qualitatively and quantitatively investigate the groundwater level rising risk in the target area of metro engineering construction, and focus on the impact of increasingly frequent extreme rainfall events on the groundwater rising phenomenon. It is mainly focused on the study area of the typical section in Jinan Metro Line 4, the modeling process was optimized based on traditional mesh generation method, and the three-dimensional geological structure containing the metro engineering structure was constructed to establish a numerical model of groundwater unsteady flow, thus to analyze the law and causes of groundwater rising along the metro line. A extreme rainfall event was further designed to simulate the response of groundwater rising. The results show that groundwater rising caused by metro engineering in west plain area of Ji'nan exhibits a spatial distribution pattern, which is mainly controlled by the angle between metro and groundwater flow direction, as well as the thickness of the aquifer. The angle between metro and groundwater flow direction is the dominant factor. Under extreme rainfall scenario, the difference in the magnitude of groundwater rising between different areas along the metro line has increased, while the spatial regularity of groundwater rising remains consistent with normal rainfall scenario. The closer to the groundwater recharge zone in the southern mountainous area, the greater the impact of extreme rainfall events. Generally speaking, short-term extreme rainfall events have minor impact on groundwater rising. The research results can provide reliable data for the groundwater protection in Jinan, and will break new ground in understanding the response of the groundwater flow field to extreme rainfall events during the process of underground engineering.
- Publication
Science Technology & Engineering, 2023, Vol 23, Issue 32, p13718
- ISSN
1671-1815
- Publication type
Article