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http://dx.doi.org/10.9711/KTAJ.2022.24.6.465

Time-dependent characteristics of viscous fluid for rock grouting  

Lee, Jong-Won (Civil & Environmental Engineering, Pusan National University)
Kim, Ji-Yeong (Civil & Environmental Engineering, Pusan National University)
Weon, Jo-Hyun (Civil & Environmental Engineering, Pusan National University)
Oh, Tae-Min (Civil & Environmental Engineering, Pusan National University)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.24, no.6, 2022 , pp. 465-481 More about this Journal
Abstract
Rock grouting is important to improve the waterproof efficiency and mechanical strength of rock medium with joint for utilizing the underground rock space such as tunnel. The grouting materials typically has been used the cement materials, which represent Bingham fluid model. This model can express the relationship of viscosity and yield strength. In addition, it is dependent with elapsed time. The grouting injection performance can be deteriorated with an increase of viscosity and yield strength in the grouting process if the time dependence is ignored. Therefore, in this study, the characteristics of viscosity and yield strength were investigated according to water-cement ratio and time dependence in the laboratory test. Numerical simulation was carried out to investigate the grouting performance according to the time dependence of characteristics in terms of the viscosity model. Given the results, the grouting injected distance and cumulative grout volume were significantly decreased when the time dependence of grouting material was considered. This study, considering the characteristics according to the time dependence of viscosity and yield strength, will be meaningful to the design of grouting injection in field applications.
Keywords
Grouting; Time-dependence; Bingham fluid; Injection performance; Numerical simulation;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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