Abstract: The prevention and treatment of tunnel drainage pipe crystal blockage is very important to the safety of tunnel structure and normal operation of tunnel. Based on the systematic review of domestic and foreign research data, the crystallization process and mechanism of tunnel drainage pipe were analyzed and summarized. The crystallization process in tunnel drainage pipe was summarized as three main stages: the penetration process of groundwater into shotcrete, the dissolution process of calcium in concrete, crystal deposition process in drainpipe. Meanwhile, based on the source of the crystalline material and the crystallization process, the factors affecting the clogging of the tunnel drainpipe were divided into internal and external factors. Internal factors include three types of groundwater quality, surrounding rock types, and shotcrete characteristics. External factors include the characteristics of the aqueous solution in the drainpipe(including the CO2 content, pH value, salt content in the solution, flow velocity), environmental factors(temperature, pressure)and engineering factors, and elaborated in detail on them. In addition, the prevention technology of drainpipe crystallization blockage was discussed from the aspects of drainage system design, drainage pipe material and concrete mix ratio. Finally, the mechanical, physical, chemical, and biological disposal methods for the crystallization of the tunnel drain pipe were discussed and analyzed in detail. The research can provide a theoretical reference for the prevention and treatment of crystal blocking disease of tunnel drainage pipe.
叶飞, 王坚, 田崇明, 何彪, 赵猛, 韩兴博, 李永健. 隧道排水管结晶堵塞病害研究现状与防治技术[J]. 隧道与地下工程灾害防治, 2020, 2(3): 13-22.
YE Fei, WANG Jian, TIAN Chongming, HE Biao, ZHAO Meng, HAN Xingbo, LI Yongjian. Research progress and control techniques of crystal blockage disease of tunnel drainpipe. Hazard Control in Tunnelling and Underground Engineering, 2020, 2(3): 13-22.
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2020, Vol. 2 
