地下多层人员密集场所灾时人员必须经过楼梯长距离上行疏散至地面，其疏散速度受到疏散距离、人员汇流和人员密度、能见度、行李等因素协同作用的影响，其疏散速度模型是地下多层人员密集场所应急疏散领域的关键基础科学问题之一。本课题首先开展十二组不同条件下楼梯中人员长距离上行疏散实验，然后根据实验结果建立疏散速度与疏散距离、人员汇流和人员密度、能见度和行李等单因素、双因素及多因素协同作用的函数关系，基于改进型格子气理论构建多因素协同作用上行疏散速度模型，最后对模型模拟预测的疏散速度和疏散时间的准确性，疏散轨迹和占用面积的重合率进行验证，并将验证后的模型应用于解决实际工程中的技术难题。课题主要的创新性体现在应用了可以准确还原人员疏散轨迹和占用面积的新型影像数据后处理技术，使实验数据更加准确可靠；模型构建过程中增设了“疲劳度”等4个因子，反映出多因素协同作用对上行疏散速度的影响，使模型构建与验证的精度更高。

The occupants in a typical underground multilayer assembly occupancy must walk upstairs through the long-distance staircases to the safe zone on the ground in case of emergence. The occupant upstairs evacuation speed in the typical underground multilayer assembly occupancies is multi-factor coupling affected by travel distance, merging behavior and occupant density, visibility, luggage and etc.The multi-factor coupling upstairs evacuation speed model is one of the important and basic science issues in the research field of emergency evacuation in the typical underground multilayer assembly occupancies. Firstly, 12 long-distance upstairs evacuation experiments in a 20-storey straircase will be carried out in different conditions, then the single-factor,double-factor and multi-factor functional relationships between evacuation speed and travel distance, merging behavior and occupant density, visibility, luggage will be derived from the experimental results; secondly, the multi-factor coupling upstairs evacuation speed model will be established based on the improved multi-grid model theory;thirdly, the accuracy of evacuation speed model and egress time predicted by the established model will be validated and verified, as well as the consistency of movement trajectory and area occuppied; and at last the validated evacuation speed model will also be applied to the evacuation design and risk assessment in the underground multilayer assembly occupancy. The innovation of this research project is that a new kind of anlysis approach of video data, which can accurately caculate the movement trajectory and area occupied for each occupant, will be used to analyze the results of evacuation experiments and drills. And the "physical endurance " and other three factors used in the speed model will also dramatically improve the accuracy of model establishing and validation. The occupant evacuation speed predicted by the model is affected by the 4 factors, i.e., travel distance, merging behavior and occupant density, visibility, luggage.