ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2023, Vol. 43 ›› Issue (11): 1973-1983.DOI: 10.3973/j.issn.2096-4498.2023.11.017
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HU Jiawei1, WANG Cong1, LEI Guangjun2, WEN Bo2
Online:
Published:
Abstract:
A novel cleaner specifically designed to mitigate crystallizationinduced clogging in tunnel drainage systems is introduced. Analysis of the tunnel crystal samples reveals low concentrations of Ca2+, Mg2+, CO32-, and SO42-and a notably high average concentration of HCO3-. This high HCO3- concentration signifies a predominantly weak alkaline environment, which was identified as the primary cause of crystallization. Utilizing energy spectrum analysis and scanning electron microscopy, the composition and microstructure of the tunnel crystal are characterized, establishing calcitetype calcium carbonate as its primary component. To assess the effectiveness of the cleaner, a simulated experimental device was employed to explore the impact of the water samplecleaner mass ratio on the cleaning rate. To optimize the formulation of the cleaner, the response surface method is employed by combining the main and auxiliary agents. In addition, safety tests for corrosion and solubility were conducted. The results unveil the following key findings: (1) The most effective mixing proportions comprise 7.5%~8.5% sulfonic acid, 0.2%~0.8% DTPMPA, and 0.2%~0.8% PBTCA. (2) The indoor simulations exhibit a cleaning rate fluctuating between 85% and 99.8%. Adjusting the proportions of materials according to different environmental conditions is essential for achieving an optimal cleaning effect.
Key words: tunnel, drainage system, crystallization clogging, chemical cleaner
HU Jiawei, WANG Cong, LEI Guangjun, WEN Bo. Development and Performance of a Novel Cleaner for Controlling Crystallization Clogging in Tunnel Drainage System[J]. Tunnel Construction, 2023, 43(11): 1973-1983.
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URL: http://www.suidaojs.com/EN/10.3973/j.issn.2096-4498.2023.11.017
http://www.suidaojs.com/EN/Y2023/V43/I11/1973
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