Abstract
Methods for calculation of thermal regime and heat loss parameter for underground tunnel into surrounding sub-soil were developed in first half of XX century, when the study of complex heat-mass exchange processes between underground tunnel, sub-soil and outdoor air is started. In tunnel it need to be provided a specific microclimate parameters, that requires a certain load on environmental control system. At present time there are some methods for calculation of heat loss parameter for underground tunnel. In this paper the analysis of real methods of calculation of heat losses of underground tunnel is accomplished.
Highlights
IntroductionAt present time the development of engineering communications, the industrialization and urbanization fatally lead to deficit of placement area for engineering utilities in big cities [1]
At present time the development of engineering communications, the industrialization and urbanization fatally lead to deficit of placement area for engineering utilities in big cities [1].Underground placement of the communications in special tunnel providing the possibility of maintenance by stuff is good idea.Network of underground communication tunnel extremely grows and is developed, that requires more detail its investigation in terms of providing with normative microclimate conditions influenced on durability and technical characteristics of communication utilities [2].One of the key factors affected on tunnel microclimate is heat loss parameter
To apply the method of Kazantcev B.A. the method for calculation of sub-soil temperature around the tunnel depending of required depth of tunnel placement taking into account such parameters as heat loss period, sub-soil heat diffusivity, range of temperature variation [4] at sub-soil surface is necessary
Summary
At present time the development of engineering communications, the industrialization and urbanization fatally lead to deficit of placement area for engineering utilities in big cities [1]. Underground placement of the communications in special tunnel providing the possibility of maintenance by stuff is good idea. Network of underground communication tunnel extremely grows and is developed, that requires more detail its investigation in terms of providing with normative microclimate conditions influenced on durability and technical characteristics of communication utilities [2]. One of the key factors affected on tunnel microclimate is heat loss parameter. As underground tunnel is underground building with varied placement depth. Heat emissions with different intensity take place.
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