JRMGE / Vol 14 / Issue 2
A grouting simulation method for quick-setting slurry in karst conduit: The sequential flow and solidification method
Zhenhao Xu, Dongdong Pan, Shucai Li, Yichi Zhang, Zehua Bu, Jie Liu
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Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, 250061, China
2022, 14(2): 423-435. doi:10.1016/j.jrmge.2021.11.006
Received: 2021-01-20 / Revised: 2021-10-04 / Accepted: 2021-10-21 / Available online: 2022-01-17
2022, 14(2): 423-435.
doi:10.1016/j.jrmge.2021.11.006
Received: 2021-01-20
Revised: 2021-10-04
Accepted: 2021-10-21
Available online: 2022-01-17
It is difficult to temporally and spatially track and characterize the slurry viscosity in flowing water during grouting simulation. In this study, a sequential flow and solidification (SFS) method considering the spatial-temporal evolution of slurry viscosity in flowing water in karst conduit is proposed. First, a time-dependent model for the threshold function of slurry viscosity is established. During the grouting process, the spatial-temporal evolution of slurry viscosity is revealed by tracking the diffusion behavior of the slurry injected at different times. This method is capable of describing the gradual solidification process of the slurry during grouting. Furthermore, a physical model of grouting in a karst conduit is developed. Second, the effectiveness of the SFS method in grouting simulation is verified by the experiment of grouting conduit in flowing water. The SFS method enables real-time monitoring of fluid velocity and pressure during grouting in flowing water and provides a feasible calculation method for revealing the grouting plugging mechanism in complex karst conduits at different engineering scales. In addition, it can be used to guide the design of grouting tests in flowing water, improve cost efficiency, and provide theoretical basis for optimizing grouting design and slurry selection.
Keywords: Karst conduit, Sequential flow and solidification (SFS), Quick-setting slurry, Grouting simulation method, Grouting in flowing water
Article Data
Author(s) Information
Zhenhao Xu
✉️ zhenhao_xu@sdu.edu.cn
Prof. Zhenhao Xu received his BSc degree in Civil Engineering from China University of Geosciences, and PhD degree in Geological Engineering from Shandong University and the University of Western Australia. After that, he conducted postdoctoral research in Geological Resources and Geological Engineering from Chinese Academy of Geological Sciences, China. He is now a professor in Shandong University, China. His research interests include (1) intelligent identification of lithology and adverse geology, disaster prevention and control in tunnelling and underground engineering; (2) numerical simulation of groundwater and grouting process; (3) advanced geological prediction, and water and mud inrush in tunnels; and (4) urban underground space development and utilization.