Abstract
Confirmation and securing of safety for underground space in the urban area is very important subject in the earthquake country. Underground space has been widely and densely developed in the large city such as Tokyo, Nagoya, Osaka, etc. Many citizens utilize subway and underground shopping mall in the daily life every day. The underground space has some advantages which are derived from a principal characteristic, namely isolation. However, the underground space also has some potential risks. In case of fire, flood, earthquake, terror and so forth, the disadvantages which amplify danger and directly threaten a human life may be actualized in the underground space. Therefore, in order to utilize the underground space safely and securely, it is inevitable to make clear the performance objectives of disaster prevention for underground space, and then to take preventive measures effectively. From such a necessity, the performance objectives of disaster prevention for underground space have been studied from the view points of prevention and mitigation of human disaster.
