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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。
A longitudinal - half transverse hybrid ventilation method is introduced. The length of the middle semi-transverse ventilation section in the double-hole unidirectional and single-hole two-way traffic can reach 6.0 and 10.0 km respectively. By using the unitary Bernoulli equation, taking the typical ventilation unit as the research object, all the calculation equations of this ventilation mode are deduced in detail. Through numerical examples, the wind pressure and wind speed distribution of the hybrid ventilation system in unidirectional traffic and two-way traffic are studied. The feasibility of longitudinal-half-horizontal hybrid ventilation in tunnel ventilation is demonstrated. In order to solve the difficulty of the longitudinal ventilation section of the long highway tunnel being too long and the middle shaft too deep, it is very helpful to realize the computer program of the ventilation tunnel selection.