Abstract

The energy pile can support the load of upper buildings and exploit the shallow geothermal energy by embedding the traditional ground-source heat pump in the pile foundation of buildings. The steel roof has a large span and poor load-bearing capacity, and it is easy to collapse in the ice and snow weather. Based on the model test and the numerical model, the differences of deicing efficiency on roof through heat exchange pipe under different heat exchange pipe materials, position of pipe layout and pipe spacing on the roof panel, etc. were analyzed in this paper, Results showed that, when the heat exchange pipes were arranged above the panel, the ice melting time was about 2 / 3 of that when heat exchange pipes were arranged under the panel; The shorter the pipe spacing and the denser the pipe arrangement, the faster the ice melting rate.

1. Introduction

Steel structure is widely used in civil and industrial buildings due to its advantages of light weight, low cost and fast construction speed[1-3]. The ice and snow conditions in winter have a great impact on the steel roof, which could lead to the damage and collapse accidents of the steel roof[4-6]. The main causes of the accident are as follows: first, the safety of the structure is greatly reduced under the condition of large load of ice and snow; Second, the load of ice and snow is not easy to flow and eliminate, a large number of local accumulation makes the roof bear the load far beyond the scope of structural design[7]. Limited to the large span and poor bearing capacity of steel roof, it is hard to deice and melt snow by manual and mechanical means[8-9]. Spraying chemical reagent can easily corrode the main body of steel structure, which leads to safety hazards. Other main snow removal methods are too expensive and not suitable for large-area roof deicing and snow melting.

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