Abstract:In this paper, the "segmental equivalent" method is used to simplify the freezing front of the three-pipe freezing steady-state temperature field under the Hydrothermal coupling. By defining the "adjustment coefficient", the analytical solution of the three-pipe freezing temperature field is derived using the principle of potential function superposition. . Combined with the three-pipe freezing large-scale physical model test, the analytical solution calculation results are compared with the test results. The results show that the analytical solution calculation results are in good agreement with the experimental results. When the seepage speed increased from 0 m/d to 6 m/d, the existence of the seepage field made the time for the three-pipe freezing temperature field to enter the stable phase extended by 1000 minutes, which was 1.57 times that when there was no seepage speed; meanwhile, the upstream area was frozen The expansion range of the front is reduced, the expansion range of the downstream region is increased, and the expansion ranges of the two sides are basically equal. From the analytical solution, it can be concluded that the percolation field reduces the average temperature on the upstream/both sides/downstream axis from -9.15℃/-7.76℃/-9.10℃ to -9.71℃/ -10.02℃/-9.10℃, indicating the percolation field The existence of sigma has a great influence on the distribution of the steady-state temperature field of the three-pipe freezing, and provides a reference for the design of artificial freezing in high-speed seepage formations.