Abstract
This short communication reports a water inrush hazard during the construction of the Shijingshan Tunnel in Zhuhai, Guangdong, China. On 15 July 2021, a water inrush accident occurred at the construction site 1.16 km away from the tunnel entrance, resulting in 14 casualties. The purpose of this study is to investigate and discuss the water inrush process in this atypical case. The principal causes of this tunneling accident include the special geological conditions at the construction site, high hydraulic conductivity at the part that connects the underground water system and the overlying water body (the Jida Reservoir), and the impact of heavy rainfall. Moreover, four significant suggestions are proposed to prevent the possible occurrence of water inrush disaster: (1) assessing the risk level in areas prone to water inrush; (2) getting a comprehensive geological prediction based on borehole data and artificial intelligent methods; (3) establishing a monitoring system during the tunneling process; (4) strengthening the self-protection skills of construction workers.
Highlights
In recent decades, the construction of infrastructure and facilities has been booming inChina, such as tunnels [1], excavations [2], metro systems [3], et al during the construction process of these infrastructures and facilities, many human engineering activities resulted in accidents and environmental issues
The Shijingshan Tunnel was excavated by using New Austrian Tunnelling Method (NATM), which is adopted when the geology is typically through very hard rock with
This communication is on a water inrush hazard that occurred on 15 July 2021, in Zhuhai, Guangdong, China
Summary
The construction of infrastructure and facilities has been booming in China, such as tunnels [1], excavations [2], metro systems [3], et al during the construction process of these infrastructures and facilities, many human engineering activities resulted in accidents and environmental issues. On June 10, 2018, water inrush hazards in the Chaoyang Tunnel caused three casualties and many injuries [11]. Risk assessment is a comprehensive safety estimation for target engineering projects and related environments [28], which are very important for warning system and rescue operation for these hazards. The project in this study is the Xingye Expressway. The studied area consists oftunnels two tunnels in Zhuhai, 1a). The area consists of two (east (east and west tunnels) starting from the intersection of Jiuzhou. At ending at the working wellnorth in theofnorth of Banzhangshan, with length a total the south, the working well in the Banzhangshan, with a total length of approximately 2.5 km
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