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CLC number: TU99

On-line Access: 2010-09-07

Received: 2010-04-02

Revision Accepted: 2010-08-02

Crosschecked: 2010-08-11

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Journal of Zhejiang University SCIENCE A 2010 Vol.11 No.9 P.668-676


Critical rainfall intensity for safe evacuation from underground spaces with flood prevention measures

Author(s):  Wei-yun Shao

Affiliation(s):  Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China

Corresponding email(s):   shaowy@zju.edu.cn

Key Words:  Underground space, Safe evacuation potential, Flood prevention measures, Critical rainfall intensity

Wei-yun Shao. Critical rainfall intensity for safe evacuation from underground spaces with flood prevention measures[J]. Journal of Zhejiang University Science A, 2010, 11(9): 668-676.

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DOI - 10.1631/jzus.A1000137

underground space in urban areas has been expanding rapidly during recent decades, and so has the incidence of fatal accidents and extensive damage to facilities resulting from underground flooding. To evaluate the safe evacuation potential of individual underground spaces in flood-prone urban areas, the hydraulic effects of flood prevention measures, e.g., stacked flashboards or sandbags and elevated steps, were incorporated in a proposed formula for estimating the depth of inundation of an underground floor. A mathematical expression of the critical rainfall intensity for safe evacuation from underground space was established and then evaluated for two types of underground spaces, an underground shopping mall and a building basement. The results show that the critical rainfall intensity for any individual underground space can be determined easily using the proposed analytical or graphical solution. However, traditional underground flood prevention measures cannot improve safety if people refuse to evacuate immediately once water intrudes into the underground space.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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