全尺寸隧道火灾实验研究与烟气逆流距离的理论预测

在建成的隧道中实施全尺寸火灾试验,得到隧道火灾自然通风模式下的烟气温度纵向变化数据和纵向蔓延情况。用OriginPro7.5软件对实验数据进行处理、拟合,得到3次实验的烟气逆流的顶棚射流温度随着离开火源距离纵向衰减规律,建立了计算烟气逆流距离的预测公式。根据隧道实体火灾实验的测量结果与理论模型的预测结果的对比,验证了理论模型的有效性,为市政公路隧道建设采用自然通风模式提供科学依据。

Test Research of Full-scale Tunnel Fire and Theoretical Prediction on the Distance of Smoke Regressing

The full-scale fire tests were conducted in the built tunnel.The longitudinal diversification data of smoke temperature and smoke longitudinal propagation data were collected.The test data are imitated with OriginPro7.5 software,the longitudinal attenuating laws of smoke temperature with the diversification of its distance from fire source are gained and the prediction model for calculating the distance of smoke regressing is built.By comparing the fire tests' data with the prediction results,it is proved that the theoretical model is valid.This model provides a scientific basis for municipal tunnel construction with natural ventilation.