Abstract
With the rapid development of urban underground space in karst areas, water inrush disasters during deep excavations have become widespread. However, there is a notable scarcity of comprehensive systematic studies on the causes of these disasters and environmental responses to them, and the required post-disaster restoration measures. This study investigates several water inrush disasters that occurred during the excavation for the Longdong Village Station on Shenzhen Metro Line 16, China. Through an extensive review of the geological and hydrological conditions, design and construction plan, and field monitoring data, several potential causes of the water inrush-induced failure were revealed, including i) special natural karst geology and hydrogeological conditions, ii) imprecise geological pre-investigation owing to limitations of geological prospecting technology, and iii) possibly unreasonable geological drilling and excavation operations. The magnitudes of all the monitoring items rarely varied throughout the implementation of the post-disaster restoration measures, which demonstrated the success of the measures and plans adopted after the water inrush accidents. This case provides a reference for the prevention of similar water inrush disasters and the required post-disaster restoration measures.
Published Version
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