Reduction of Adherent Forces of Sedimentous Contaminants in Tunnel Drainage using Vibrations from Flexible and Transparent Organic Films

Xin, Zhenhua; Moon, Jun Ho; Kim, Young Uk

doi:10.1007/s12205-017-0688-5

Cited by 9 publications

(2 citation statements)

References 10 publications

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“…In terms of microscopic theory, the diffusion boundary layer (DBL) flow system control model (Dreybrodt and Buhmann 2011;Liu, et al 2003) and the PWP surface reaction control model (Chen, et al 2019) were proposed and applied to study the kinetics of CaCO3 deposition and dissolution; According to the scaling mechanism of CaCO3 on heat exchange surfaces (Hasson, et al 2002), the deposition of CaCO3 crystalline scale on heat exchange surfaces is mainly controlled by the diffusion speed of Ca 2+ and HCO3 -towards the scale and fluid interface when hard water flows in the pipe under turbulent conditions; In the scaling test of CaCO3-CaSO4 mixed solution in annular pipes, it was found that scale formation is mainly controlled by molecular diffusion at low flow rates and by wall ion reactions at high flow rates (Helalizadeh, et al 2000). In terms of macroscopic test, on the one hand, the influence law of tunnel drainage pipe blockage in karst areas under different drainage pipe diameters, pipe materials and pipe roughnesses are extensively discussed (Li, et al 2021a;Liu, et al 2020b;Yoo 2016), on the other hand, the influence of natural factors such as water temperature, hydraulic gradient, flow rate, pH, soil and microorganism are focused on (Ryparova, et al 2021;Shi, et al 2015;Xin, et al 2018). However, both micro-theory and macro-tests are analyzed qualitatively, and the micro-macro relationship has not yet been established; thus, the regularity of the crystalline scale formation rate of drainage pipes is studied quantitatively.…”

Section: Introductionmentioning

confidence: 99%

Crystallization rate model of tunnel drainage pipes in karst areas

Wang

et al. 2022

Preprint

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The crystallization blockage of the tunnel drainage pipes in karst areas often threatens the normal construction of tunnels and affects operation of drainage systems. Based on basic theory of CaCO3 crystallization, this study analyses the law of the crystalline scale formation rate of tunnel drainage pipes in karst areas through three mass transfer mechanisms: convective mass transfer, molecular diffusion and wall ion reactions, obtains the calculation model of crystalline scale formation rate of drainage pipes, and verifies model by simulating crystalline scale formation tests of tunnel drainage pipes. The results show that factors such as the flow rate of karst water, the inner diameters of tunnel drainage pipes, the molecular diffusion coefficient, the dynamic viscosity of karst water, the molecular diffusion coefficient of calcium carbonate, the temperature of karst water, and the slopes of tunnel drainage pipes have certain influences on the crystallization of the tunnel drainage pipes in karst areas, and they promote or inhibit the formation of scale layers on the inner walls of the tunnel drainage pipes in karst areas by affecting the efficiency of convective mass transfer, molecular diffusion and wall ion reactions; under different test conditions, the average relative errors between the calculated results of the crystalline scale formation rate of drainage pipes and those of the pipes in the test group are 9.1%, 13.7%, 14.2% and 16.1% respectively. Considering the scouring effect of water flow on crystalline scale layers, although there are certain errors in the results, this does not affect the overall results

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Section: Introductionmentioning

confidence: 99%

Crystallization rate model of tunnel drainage pipes in karst areas

Wang

et al. 2022

Preprint

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“…Yee et al (2015) and Yee (2015) analyzed the influence between magnetic fields and calcium carbonate deposition through laboratory tests and field evaluations to prevent clogging. Besides, wave vibrations (Xin et al, 2018), Quantum Stick (Jung et al, 2013) and geosynthetic (Jang et al, 2015), etc. were also investigated.…”

Section: Introductionmentioning

confidence: 99%

Development and assessment of a water pressure reduction system for lining invert of underwater tunnels

Cheng

Liu

et al. 2019

Marine Georesources & Geotechnology

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In this study, the feasibility of a novel bottom-up drainage and water pressure reduction system for reducing the secondary lining external water pressure on tunnels has been validated by conducting laboratory evaluations. The tunnels environment including surrounding rock, lining, bottom drainage system and other supplementary components have been simulated to investigate the working pattern and efficiency of this drainage system. The drainage system has been further optimized by analyzing the measured

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Water-blocking nano-composite cement-based grouting materials

Wang

Gong

et al. 2019

Appl Nanosci

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Reduction of Adherent Forces of Sedimentous Contaminants in Tunnel Drainage using Vibrations from Flexible and Transparent Organic Films

Cited by 9 publications

References 10 publications

Crystallization rate model of tunnel drainage pipes in karst areas

Crystallization rate model of tunnel drainage pipes in karst areas

Development and assessment of a water pressure reduction system for lining invert of underwater tunnels

Water-blocking nano-composite cement-based grouting materials

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