Study on the frost heave mechanism of the water conveyance canal and optimized design of slope protection

Canals play a vital role in water supply, irrigation, flood control, electricity generation, and shipping. However, in seasonally frozen regions, canal slopes often suffer from damage as a result of frost heave. This research focused on the Hadashan Water Conservancy Hub, investigated the factors influencing frost heave through laboratory and field tests, and examined the effectiveness of three types of slope protection structures-insulation boards, concrete lining, and gravel. The results indicate that temperature and soil water content are important factors influencing frost heave. This research tested the effectiveness of an optimized concrete lining structure-articulated molded concrete-in protecting canal slopes against frost heave. This structure can protect the slope from frost damage, and has the ability to adjust to frost heave and thaw deformation. The results of the study will provide a reliable reference for the design of protection of canal slopes against frost heave in cold regions.

Automated summary

Canals play important roles in various aspects, but in seasonally frozen regions, canal slopes often suffer damage from frost heave. This research focused on the Hadashan Water Conservancy Hub, investigating factors influencing frost heave and testing the effectiveness of various protection structures. The study found that temperature and soil water content are key factors, and a specific concrete lining structure was effective in protecting canal slopes.