Numerical investigation of water supply pipe optimal buried depth in severe cold region

摘要

Frost heave often causes damage to rural water supply pipes in severe cold region, therefore, the anti-frost technology of shallow buried pipe with insulation layer was proposed in this article. Firstly, by analyzing the calculation of frost heave and measuring the ground temperature of the different depth, the optimal buried depth was founded preliminarily. Secondly, establishing the unsteady heat transfer model with the Matlab software, the ground temperature field were simulated when the pipe depth differs. Thus, the conclusion is that the optimal depth is 1.5m for the buried pipes with little atmospheric disturbance effect and the thaw circle is larger.