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

(1)建立了考虑地面热湿耦合传递的地下空间热湿特性分析模型。利用该模型对自然条件下地下空间的热湿特性作为典型模型进行了讨论。采用有限差分法进行了二维分析。讨论了换气速率和墙体结构对室内气候的影响。(2)在神户裸地现场进行了地表温度监测，测量了地面温度和水化学势。测量了土壤的热、湿特性。然后，利用实测室外条件对考虑热湿耦合的瞬态一维分析进行数值模拟。结果表明，在无雨和有雨条件下，数值计算结果与试验结果吻合较好。(3)采用完美混合模型研究了地下建筑烟气的运动规律。发现了地下建筑烟气流动的特殊性，即烟气沿整个循环流向火灾楼层下层扩散。研究了控制循环流的烟气控制方法。仅排烟方式不足以控制烟流，有必要考虑同时排烟送风方式。(4)楼梯间烟流和走廊内烟锋运动实验为密度流模型分析烟流提供了基础背景数据。

(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.