Research of Analysis and Planning for Comfortableness and Safety in Under-ground Construction

(1)推导了考虑地下空间热湿耦合传递的地下空间热湿行为分析模型。利用该模型讨论了地下空间在自然条件下的热湿行为。应用有限差分方法进行了二维分析。讨论了空气变化率和墙体结构对室内气候的依赖关系。(2)在神户裸露地面现场进行了地表温度监测，测量了地面温度和水化学势。对地基土的热湿性质进行了测试。在此基础上，利用实测室外条件，对考虑热湿耦合的一维暂态分析进行了数值模拟。结果表明，无论是在无降雨条件下还是在降雨条件下，数值模拟结果都与实验结果吻合较好。(3)利用理想混合模型研究了地下建筑内烟气的运动规律。在地下建筑中发现了一种特殊的烟气流动，即烟雾通过整个环流在火灾楼层的下部扩散。研究了控制环流的烟度控制方法。仅靠排烟的方法不足以控制烟气流动，必须考虑同时排烟送风的方法。(4)楼梯内的烟气流动和走廊内的烟锋运动的实验为用密度流模型分析烟气流动提供了基础的背景数据。

(1) the model for analysis of thermal and hygric behavior of the underground space, taking into account coupled heat and moisture transfer in/on the ground, is derived. The heat and moisture behavior of an underground space as a typical model are discussed using the model under natural condition. The 2-dimensional analysis to which the finite difference method is applied are performed. The dependency of air change rate and the wall structure on room climate are discussed.(2) The surface temperature of the field were monitored in the bare ground site in Kobe, in which the temperature and the water chemical potential were measured in the ground. The thermal and the moisture properties of the ground soil are measured. After then, the transient one-dimensional analysis taken into account coupled heat and moisture transfer were simulated numerically using the measured outdoor condition. The results show that the numerical results are good agreement with the experimental results both during no-rainfall and rainfall.(3) The smoke movement in the underground construction were studied by using of the perfect mixing model. The particular smoke flow in the underground construction, that the smoke diffuses in the lower level of the fire floor by the whole circular flow, was found. The smoke control method was studied to control the circular flow. The exhaust only method is insufficient to control the smoke flow, and it is necessary to consider the simultaneous smoke exhaust and air supply method.(4) The experiments of the smoke flow in the staircase and the smoke front movement in the corridor gave the fundamental background data to analyze the smoke flow by the density flow model.