Study On The Ventilation And Disaster Prevention Of Urban River Highway Tunnel Services Layer

With economic development and urban construction, a growing number of river tunnels will be constructed with other municipal facilities, in particular,there are a large number of municipal facilities, such as cables, heat pipes in the tunnel services.They can set free a larger amount of heat into the tunnel services,for this reason,it is necessary to consider the issue of ventilation.This paper has been selected the cable as a heat source,which has universal and most representative in the municipal facilities, and then,a number of issues on ventilation and disaster prevention of urban river highway tunnel services layer will be related to explore.The main research method is by using the combination of theoretical thermal calculation and FLUENT numerical simulation of three-dimensional modeling. The theoretical thermal calculation is mainly set up to solve the associated heat equation;The FLUENT numerical simulation of three-dimensional modeling is based on the ventilation cooling control equation followed by the establishment of the relevant turbulence model, through the finite volume method, the model differential equations to discrete control treatment, using SIMPLE algorithm.This paper focuses on the speed at different ventilation conditions, the river tunnel service layer temperature, speed and pressure changes in the characteristics and a reasonable interval length range of the service layer ventilation.In addition, it is specialized to make recommendations and solutions on the disaster of tunnel services layer.In this paper, the discussion through the study of river tunnel services layer for more fans Selection Services layer, ventilation mode and range of services such as the length of the selected layer ventilation, security design and disaster prevention and rescue research questions to provide an effective reference.