Journal
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
Volume 48, Issue -, Pages 35-42Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tust.2015.02.001
Keywords
Longitudinal ventilation; Urban traffic link tunnel; Smoke control; Hydraulic analysis; Looped network
Funding
- National Natural Science Foundation of China (NSFC) [51106189, 51178482]
- Natural Science Foundation Project of CQ CSTC [cstc2011jjA0007]
- Fundamental Research Funds for the Central Universities [106112013CDJZR210001]
- 111 Project [B13041]
Ask authors/readers for more resources
An urban traffic link tunnel (UTLT) typically consists of a looped main tunnel and several adjoining ramp tunnels. This complex network system creates a high level of fire risk and complicates smoke control. A generic design procedure to control the smoke flow in a UTLT with longitudinal forced ventilation is proposed in this paper with the relevant design criteria. The ventilation network in a UTLT is divided into three characterized regions: smoke discharge branches, smoke-prevention branches upstream of the fire and the smoke-prevention branches downstream of the fire. This conceptual division converts the looped ventilation network into a branched one, where a simple, one-dimensional calculation approach can be used to develop an appropriate ventilation system, and to solve the flow rates for the various branches. The ventilation system in a UTLT was determined using this novel design method, and the resultant flow rates for the key branches were compared to the steady-state solutions for a three-dimensional numerical simulation. The results demonstrate that the method proposed in this paper is a valid and efficient design tool for controlling smoke in UTLTs. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available