(1) Background: Lining voids and macroscopic water freezing are both prominent issues that threaten driving safety in high-speed railway tunnels.With the continuous expansion of the scale of high-speed rail tunnels in extremely cold areas in China, the issues of lining voids, water accumulation, and frost heaving have triggered heated discussions.The need to reveal the frost-heave mechanism is urgent.(2) Methods: Firstly, a simulation experiment of the frost heaving of accumulated water was carried out based on the discharge conditions of accumulated water.
Secondly, a numerical model was used to study the evolution process of frost heaves caused by accumulated water in voids.Finally, a drainage coefficient was introduced to propose a method for calculating the frost-heave force of accumulated water in igora vibrance 6-12 voids.(3) Results: The blockage of the drainage channel leads to the generation of frost-heave force; the freezing/thawing process of the void water develops from the thinnest part to the thickest part of the void edge, and the freeze/thaw cycle of the water body causes the frost-heave force to become greater and greater in the evacuated cavity.The higher the height and the closer the drainage edible bra and panty set channel is to the hollow bottom, the greater the frost-heave force when the accumulated water freezes.
(4) Conclusions: When the evacuated water freezes, it develops from the thinner edge to the thicker center.The magnitude of the frost-heave force is affected by the freeze/thaw cycle, the height of the evacuated cavity, and the position of the drainage channel.