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Experimental Study on the Mechanism of Intermittent Water and Mud Inrush Caused by Dredging and Rainfall Considering Sedimentary Characteristics in Karst Tunnels

  • Geotechnical Engineering
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KSCE Journal of Civil Engineering Aims and scope

Abstract

The mechanism of intermittent water and mud inrush is a difficult problem faced by disaster prevention and safe construction in karst tunnels. Aiming at revealing the mechanism of intermittent water and mud inrush, we developed an integrated testing system for filling medium deposition in karst caves and intermittent water and mud inrush. By conducting a serial of laboratory experiments, we analyzed the sedimentary characteristics of the filling medium in karst caves and the catastrophic process of intermittent water and mud inrush induced by dredging and rainfall under realistic sedimentary conditions. The results show that the filling medium exhibits layered deposition characteristics, which are affected by the water circulation time, the amount of sediments carried by water and the water flow rate. The first inrush incubation time reduces with the water head increases. The critical water head and the disaster incubation time increase with the deposition height increases. Under the same conditions, the first inrush incubation time of gravel type, silt type, and clay type filling medium decrease sequentially. The results can provide a theoretical basis for preventing intermittent water and mud inrush disasters in karst tunnels.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (Grant No. 52178388), the National Key Basic Research and Development Plan (973 Plan) Project (Grant No. 2013CB036001), the Key Scientific and Technological Project of Henan Province (Grant No. 212102310292), the Natural Science Foundation of Henan Province (Grant No. 212300410146), the Open Foundation of the State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures (Grant No. KF2020-21), the Fundamental Research Funds for the Universities of Henan Province (Grant No. NSFRF210337), the Opening Project of Henan Key Laboratory of Underground Engineering and Disaster Prevention (Henan Polytechnic University) (Grant No. KFKT 2021-01), the Doctoral Fund of Henan Polytechnic University (Grant No. B2020-41).

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Correspondence to Zhengguo Zhu.

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Huang, X., Wang, T., Xu, Z. et al. Experimental Study on the Mechanism of Intermittent Water and Mud Inrush Caused by Dredging and Rainfall Considering Sedimentary Characteristics in Karst Tunnels. KSCE J Civ Eng 27, 2016–2029 (2023). https://doi.org/10.1007/s12205-023-1837-7

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  • DOI: https://doi.org/10.1007/s12205-023-1837-7

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