潛盾隧道永久性防水隔艙閘門風險因素分析-以高雄捷運O4車站為例

THE RISK ANALYSIS OF PERMANENT FLOODGATE IN SHIELD TUNNEL - BASED ON KAOHSIUNG MRT O4 STATION

　　高雄捷運O4市議會站因西側有愛河通過，為預防在營運中因地震、洪水或隧道意外產生之高溫導致隧道破裂，造成外水大量湧入地下捷運設施之狀況，故規劃於O4市議會站東側潛盾隧道設置永久性防水隔艙閘門，以阻隔突發之外水瞬間漫延整個路網而危及營運安全。
　　本研究目的為：(一)利用曾經參與過O4車站防水隔艙閘門系統之不同階段相關人員進行問卷調查，來探討防水隔艙閘門系統之整體效能為何。(二)利用風險評估矩陣法，對高雄捷運O4車站防水隔艙閘門相關系統之各部件風險進行評估，並取得防水隔艙閘門系統各部件風險之排序。
　　研究結果顯示：(一)對系統風險影響主要為電氣系統與自然災害中之地震。(二) 透過風險評估矩陣劃分其風險等級，前十名由高到低順序為地震、緊急電源、火災、高(低)位置水位偵測裝置、CCTV監視系統、洪水、通訊設備、其他應變設備、油壓泵、儀錶板。

　　There is the love river in the west of Kaohsiung MRT O4 Council Station. Given examples of mother nature or human error disasters such as earthquake, flood and high temperature, the prevention of unpredictable influx of a large amount of water, Kaohsiung MRT set up a permanent floodgate in the east of MRT O4 Station to prevent the spread of water throughout the whole railway.
　　The motivation of current research includes two parts. The first part is to conduct a questionnaire survey to the relevant personnel of O4 station’s floodgate system, and investigate the overall system performance. The second part is to assess the risk of related components in O4 station’s floodgate system by the risk assessment method, and estimate the risky order of the components of floodgate system.
　　After examining and analyzing overall surveys, the recommended conclusions of current study are summarized as follows : (a) The major impacts on system risk are the electrical system and the natural disasters such as earthquake. (b)Use the risk matrix method, the top ten of risk’s grade are the earthquake, emergency power, fire, high (low) the location of the water level detection device, CCTV surveillance system, flood, communication equipment, related emergency equipment, hydraulic pump, instrument board.