特长公路隧道纵向一半横向混合通风方式研究

介绍了一种纵向—半横向混合通风方式,双洞单向、单洞双向交通时中间半横向通风段的长度分别可达到6.0、10.0 km。利用一元流伯努利方程,以典型通风单元为研究对象,详细地推导了这种通风方式的所有计算方程。通过具体数值算例,研究了这种混合通风方式在单向交通和双向交通时的风压、风速分布,论证了纵向—半横向混合通风方式在特长公路隧道通风中应用的可行性。为解决特长公路隧道纵向通风分段太长和中间竖井过深的困难,实现公路隧道通风方案选择的计算机程序化提供了很好的帮助。

Research on the combined longitudinal and semi-transverse ventilation system in lengthy highway tunnels

In this paper,a combined longitudinal and semi-transverse ventilation system is recommended,and the equations being used to compute ventilation are deduced in detail.By using the combined longitudinal and semi-transverse ventilation system,it will be greatly helpful to realize the computer programming in the selection of ventilation systems in highway tunnels and solve many problems,such as the limitation to the length of each subsection in longitudinal ventilation system tunnels and the over-depth of the airshaft.The distribution of pressure and velocity in both one-way and two-way traffic tunnels is predicted under this ventilation system by specific numerical computation examples.It is proved that the application of the combined longitudinal and semi-transverse ventilation system is feasible in the lengthy highway tunnels.