Crystallization law of karst water in tunnel drainage system based on DBL theory

When a tunnel is constructed in a karst area, crystallization of the drainage pipe caused by karst water often threatens the normal operation of the tunnel. This work contributes to this field of research by proposing a functional model based on the diffusion boundary layer (DBL) theory proposed by...

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Autores principales:	Wang YongDong, Liu Yang, Qi ChuFan, Zhou TianYue, Ye Ming, Wang Tao
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	tunnel engineering dbl theory crystallization blockage crystallization rate model model test Physics QC1-999
Acceso en línea:	https://doaj.org/article/bee09f7e950940faa0a13ec8f07123af
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spelling	oai:doaj.org-article:bee09f7e950940faa0a13ec8f07123af2021-12-05T14:11:01ZCrystallization law of karst water in tunnel drainage system based on DBL theory2391-547110.1515/phys-2021-0029https://doaj.org/article/bee09f7e950940faa0a13ec8f07123af2021-05-01T00:00:00Zhttps://doi.org/10.1515/phys-2021-0029https://doaj.org/toc/2391-5471When a tunnel is constructed in a karst area, crystallization of the drainage pipe caused by karst water often threatens the normal operation of the tunnel. This work contributes to this field of research by proposing a functional model based on the diffusion boundary layer (DBL) theory proposed by Dreybrodt in the 1990s. The model is formed by determining the flow rate distribution of the drainage pipe in a laminar flow state and turbulent state, and then by applying Fick’s diffusion law and Skelland’s approximate formula. Then, to further verify the applicability of the functional model, a model test was carried out in the laboratory and the test results are compared to the theoretical results. The results show that the crystallization rate of karst water is mainly affected by the roughness of the pipe wall, followed by the slope of pipes. The slope can affect flow state by controlling the flow rate, which in turn affects the crystallization rate of karst water. When the slope of the drainage pipe is 3, 4, and 5%, the error between the experimental results and the theoretical calculation results is 24.7, 8.07, and 27.9%, respectively, and when the liquid level in the pipe is 7.2, 10.2, and 13.3 mm, the error is 27.9, 9.82, and 2.07%, respectively. Considering that the flow will take away the crystalline deposits on the pipe wall in the experiment, although some results have certain errors, they do not affect the overall regularity.Wang YongDongLiu YangQi ChuFanZhou TianYueYe MingWang TaoDe Gruyterarticletunnel engineeringdbl theorycrystallization blockagecrystallization rate modelmodel testPhysicsQC1-999ENOpen Physics, Vol 19, Iss 1, Pp 241-255 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	tunnel engineering dbl theory crystallization blockage crystallization rate model model test Physics QC1-999
spellingShingle	tunnel engineering dbl theory crystallization blockage crystallization rate model model test Physics QC1-999 Wang YongDong Liu Yang Qi ChuFan Zhou TianYue Ye Ming Wang Tao Crystallization law of karst water in tunnel drainage system based on DBL theory
description	When a tunnel is constructed in a karst area, crystallization of the drainage pipe caused by karst water often threatens the normal operation of the tunnel. This work contributes to this field of research by proposing a functional model based on the diffusion boundary layer (DBL) theory proposed by Dreybrodt in the 1990s. The model is formed by determining the flow rate distribution of the drainage pipe in a laminar flow state and turbulent state, and then by applying Fick’s diffusion law and Skelland’s approximate formula. Then, to further verify the applicability of the functional model, a model test was carried out in the laboratory and the test results are compared to the theoretical results. The results show that the crystallization rate of karst water is mainly affected by the roughness of the pipe wall, followed by the slope of pipes. The slope can affect flow state by controlling the flow rate, which in turn affects the crystallization rate of karst water. When the slope of the drainage pipe is 3, 4, and 5%, the error between the experimental results and the theoretical calculation results is 24.7, 8.07, and 27.9%, respectively, and when the liquid level in the pipe is 7.2, 10.2, and 13.3 mm, the error is 27.9, 9.82, and 2.07%, respectively. Considering that the flow will take away the crystalline deposits on the pipe wall in the experiment, although some results have certain errors, they do not affect the overall regularity.
format	article
author	Wang YongDong Liu Yang Qi ChuFan Zhou TianYue Ye Ming Wang Tao
author_facet	Wang YongDong Liu Yang Qi ChuFan Zhou TianYue Ye Ming Wang Tao
author_sort	Wang YongDong
title	Crystallization law of karst water in tunnel drainage system based on DBL theory
title_short	Crystallization law of karst water in tunnel drainage system based on DBL theory
title_full	Crystallization law of karst water in tunnel drainage system based on DBL theory
title_fullStr	Crystallization law of karst water in tunnel drainage system based on DBL theory
title_full_unstemmed	Crystallization law of karst water in tunnel drainage system based on DBL theory
title_sort	crystallization law of karst water in tunnel drainage system based on dbl theory
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/bee09f7e950940faa0a13ec8f07123af
work_keys_str_mv	AT wangyongdong crystallizationlawofkarstwaterintunneldrainagesystembasedondbltheory AT liuyang crystallizationlawofkarstwaterintunneldrainagesystembasedondbltheory AT qichufan crystallizationlawofkarstwaterintunneldrainagesystembasedondbltheory AT zhoutianyue crystallizationlawofkarstwaterintunneldrainagesystembasedondbltheory AT yeming crystallizationlawofkarstwaterintunneldrainagesystembasedondbltheory AT wangtao crystallizationlawofkarstwaterintunneldrainagesystembasedondbltheory
_version_	1718371498910023680

Crystallization law of karst water in tunnel drainage system based on DBL theory

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