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Our research findings indicate that the mass of crystals in the drainage pipes would experience gradual increases and tend to stabilize with the test cycle, whereas the total mass of such crystals would decrease first before increasing with the intensity of the magnetic field.
1 Σεπ 2023 · According to the studies, crystallization in the pipes of the tunnel drainage system can be significantly reduced by using specifically enhanced drainage pipes, such as electromagnetically modified drainage pipes, chemically coated drainage pipes, and flocking modified drainage pipes.
28 Οκτ 2022 · Crystal blockage of tunnel drainage pipes is one of the main causes of problems such as lining cracking and water leakage. The study of the crystal development rule is of great significance for the design of tunnel drainage systems and the long-term safety of tunnel support structures.
3 Δεκ 2021 · The results show that: (1) With the increase of drainage pipe diameter (20–32 mm), the crystallinity of drainage pipes first increases and then decreases. (2) With the increase of water velocity in the drainage pipe (22.0–63.5 cm·s−1), the crystallinity of the drainage pipes gradually decreases from 1.20 g to 0.70 g.
30 Σεπ 2022 · For tunnels with blockage due to crystallization, from the perspective of changing the internal environment, high-pressure water guns or environmentally friendly acidic reagents can be used to dredge the pipes and thus avoid damage to the lining caused by drainage system blockage.
In order to optimize the tun-nel drainage system, it is necessary to identify the locations that are prone to crystallization. This paper recorded the quantity and the locations of the crystallizations in over ten tunnels in opera-tion period along Renxin Expressway and Yinghuai Expressway in Guangdong Province.
Therefore, this paper aims to use scale inhibitors to prevent the formation of calcium carbonate crystals in the tunnel drainage system, thereby mitigating the severity of this disease and minimizing its impact on tunnel operations.
