Experimental study on anti‐crystallization law of tunnel transverse flocking drainpipe at different velocities. (13th April 2020)

• Record Type: Journal Article
• Authors: Liu, Shiyang; Gao, Feng; Zhang, Xuefu; Han, Fenglei; Zhou, Yuanfu; Xiang, Kun; Xiao, Dongjie
• Other Names: Ashraf Muhammad Aqeel guestEditor.; Faheem Muhammad guestEditor.
• Is Part Of: Asia-Pacific journal of chemical engineering. Volume 15(2020)Supplement 1
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-04-13
• Subjects: anti‐crystallization -- flocking drainage pipe -- tunnel -- villi length -- water velocity; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/apj.2470
• Languages: English
• ISSNs: 1932-2135

Abstract

Abstract: With the increasing of the tunnel operation life, various diseases of the tunnel are gradually highlighted, especially the lining cracking and leakage caused by the crystal blocking pipe of the drainage system, which brings serious hidden trouble to the safe operation of the tunnel. In order to solve the problem of crystal plugging of horizontal drainage pipe in tunnel, the transverse drainage pipe of the tunnel was taken as the research object, combined with the field survey data, and the indoor test was used to analyze the anti‐crystallization law of flocking drainage pipe at different velocities. The results showed that the flocking drainage pipes had an anti‐crystallization effect, and the anti‐crystallization efficiency could be increased by more than 50% compared with the ordinary drainage pipes, and the flow rate at 6.82 cm/s could reach more than 60%. At the flow rate of 5.46 cm/s, the crystallization on flocking drainage pipes at the later stage of the test remained basically unchanged and was less than that on ordinary drainage pipes. The change in the weight of crystals on the flocking drainage pipes was approximately sinusoidal, and the change period was different at different flow rates; among which, the change period of crystallization on the flocking drainpipe was shorter when the villi length was shorter at low flow rates.