Road Tunnel Ventilation Design Software Vdsht Prepared

According to the ventilation theory of highway tunnel, the paper deduces the calculating equations of longitudinal ventilation, semi-transverse ventilation and transverse ventilation. Based on them, two combined ventilation systems, longitudinal/semi-transverse ventilation and longitudinal/transverse ventilation, are referred and deduced.The paper attempts to establish an evaluating and comparing system for highway tunnel ventilation programs. The system compares serving level and running security besides the technique and economy aspects, to which the available ventilation strategies refer merely.Finally, a ventilation designing software for the highway tunnel, VDSHT, is accomplished according to the calculating equations and the evaluating and comparing system in the paper. VDSHT, compiled by the visual language DELPHI, has good interface and is easy to handle. It can calculate most of the ventilation types now. Some typical examples are given in the paper, which verified the correctness and practicality of VDSHT.