金门特长公路隧道通风方案比选研究

为解决目前特长公路隧道通风方案比选时局限于送排式通风的问题，从方案设计角度分析几种不同纵向通风模式的功能特点、适用条件，结合送排式通风与互补式通风的特点，提出单通道互补式通风的组合通风模式，并以金门特长公路隧道为例，从全寿命周期角度，对“通风井送排式”“单通道互补式”“双通道互补式”“吸尘式”4种通风方案进行比选研究。结果表明： 1）送排式通风受通风井位置影响较大，从运营通风角度，宜设置在上坡隧道中部偏下风方向； 2）互补式、吸尘式通风能够突破通风井选址的限制，但对于超过5 km的隧道，需要设置专用排烟井； 3）单通道互补式通风省去送风井，保留了送排式通风的排烟功能，具备比选价值。

Comparison and Selection of Ventilation Schemes for Jinmen  Extra long Highway Tunnel

The blow and exhaust ventilation is the most popular scheme in extra long highway tunnels at present. The functional characteristics and applicable conditions of different longitudinal ventilation modes are analyzed in terms of design. The ventilation mode of single channel complementary ventilation is proposed based on the study of characteristics of blow and exhaust ventilation and complementary ventilation. By taking Jinmen Extro long Highway Tunnel for an example, four ventilation schemes, i.e., blow and exhaust ventilation, single channel complementary ventilation, double channel complementary ventilation and dust collection ventilation, are compared and studied from the view of life cycle. The main conclusions are drawn as follows: (1) The position of ventilation shaft has a great influence on blow and exhaust ventilation system, it should be set in the downstream direction of the middle part of the uphill tunnel. (2) Complementary ventilation and dust collection ventilation do not consinder the location of ventilation shaft; for tunnels over 5 km, special exhaust shafts should be set. (3) Single channel complementary ventilation does not need the ventilation shaft and retains the function of exhaust smoke, which is worth considering in scheme comparison.