建置橋梁斷橋警示系統之研究(二)

Abstract

橋梁為聯繫公路系統之重要設施，目前公路主管機關對於橋梁發生災害或有發生災害危險之虞，多訂有封橋標準作業程序，以保障用路人生命財產安全，並使公路運輸功能所遭受損害減至最低程度，但汛期中難以全面針對每座橋梁進行全時間的監控，爰此，交通部運輸研究所於99年度辦理「建置橋梁斷橋警示系統之研究」，提出三種不同複雜程度之警示系統，以便於橋梁破壞發生時提供用路人及養護單位即時之資訊，提醒用路人前方有危險，進而降低災害後續可能造成之損傷。本計畫主要目的係基於簡單、可靠（避免錯誤警報）、設置及維護成本低、易於組裝、校正及維護等特性，針對前期研究提出檢討報告，並進一步精進與改良，提出更經濟且更符合實務單位需求之系統研發報告，以期後續能順利推廣至公路管理機關。

Bridges are critical facilities in the transportation system. However, due to limited manpower and budget, it is impossible to keep all bridges under full scrutiny during flooding events. Besides continuing research on bridge health monitoring, it is equally important to devise economical, simplified, and durable measure for real time bridge failure warning to reduce possible losses due to bridge collapse. This study focuses on developing real-time bridge failure warning system as a last resort to protect bridge users. The study reviewed existing methods and proposed three prototypes of bridge failure warning systems, including (1)simple open circuit detector, (2)extension detection device, and (3)Time Domain Reflectometry (TDR) method. The main purpose of this project is based on simple, reliable (to avoid false alarms), install and maintain low cost, easy assembly, calibration and maintenance of properties, preliminary research for the report of the review and further refine and improve, make more economical and more consistent Practice report of system development unit needs to be extended to follow a smooth road management authorities.