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    题名: 橋梁抗洪能力之整合性診斷與提昇技術-橋梁抗洪能力之整合性診斷與提昇技術暨子計畫一-「橋梁基礎地質特性與沖刷深度探測技術」( I );Integrated Diagnosis and Enhancement Technologies on Flood Resistant Capacity of Bridge and Sub-Project “Inspection Techniques Development on Geotechnical Characteristics and Scouring Depths of Bridge Foundations”
    作者: 王仲宇;洪崇展
    贡献者: 土木工程學系
    关键词: 抗洪能力;水理演算;流固耦合模式;橋梁基礎穩定性分析;沖刷探測;災害資訊與決策;研究領域:環保工程
    日期: 2011-03-01
    上传时间: 2012-01-17 17:22:51 (UTC+8)
    出版者: 行政院國家科學委員會
    摘要: 本三年期計畫研究目的在於發展實用之橋梁抗洪能力之整合性診斷與提昇技術,以作為現有橋梁複合型洪災安全之依據,整合結構、水利、大地、地球物理勘查/檢測技術與防災資訊管理等專業領域之六個子計畫,架構涵括四大部分:(1)橋梁抗洪災害庫與決策系統(基本端與應用端):橋梁基本資料、水文與氣象資料,以及歷史災害災情資料調查建置,並發展橋梁災害潛勢評估流程,輔助災中救災之決策支援系統;(2)橋梁現地特性探測:地球物理探測為導向之橋址基礎、地質、地形與沖刷之整合研判技術,開發移動型重錘式沖刷計檢測技術,針對洪汛時與洪汛後橋址基礎沖刷進行評估,應用河床材質波速分布與抗沖刷特性,發展臺灣本土之河床材質沖刷特性指標;(3)橋梁抗洪能力量化評估(砂質河段特性,礫石河段特性,土石流與漂流木效應):內容為一、二維水理演算,三維流固耦合模式模擬與橋梁基礎穩定性分析等三個鍵連式架構,提出水位、流速、沖刷深度為參數,橋梁抗洪能力之警戒與臨界狀態圖;(4)橋梁抗洪提昇技術:發展經濟耐用型橋墩洪水消能設施技術,達到最佳的減緩沖刷與橋墩保護功效。本計畫研究內容有模擬技術與檢測技術之創新性,提昇臺灣橋梁洪害防災科技能力之技術與能見度。 The objective of the three-year-term project is to develop integrated diagnosis and enhancement technologies on flood resistant capacity of bridges in practical for safety assessment basis on multiple flood hazards. The integrated research consists of structural engineering, hydraulic engineering, geotechnical engineering, geophysical/inspection techniques, and hazard prevention information management fields allotted within six sub-projects. The research framework is composed of four main sections, including (1) Bridge flood resistant archives and decision system with basic and application performance, (2) Inspection techniques of geotechnical characteristics, (3) Quantified evaluation of flood resistant capacity on bridges, and (4) Enhancement technologies of flood resistance. The bridge flood resistant archives and decision system emphasizes on establishment of bridge fundamental information, hydrological and metrological information, and historic disaster information for developing a hazard potential assessment performance as an assistance on in-hazard and post-hazard decision. Inspection techniques of geotechnical characteristics targets at comprehensive identification on bridge foundations, geological, river bed, and scouring using geophysical inspections. Innovative mobile spherical scouring meters are applied to measure scouring depth and flood velocity around bridge sites during and after flood. The suggested localized scouring index in Taiwan is associated with geotechnical characteristics and scouring information. Quantified evaluation of flood resistant capacity on bridges is linking as a continuous numerical simulation chain initiating from one-dimensional and two-dimensional hydraulic computations, three-dimensional fluid-solid coupled simulation, to stability analysis on bridge foundations along sandy and gravely rivers. In addition, the numerical analysis can assess the scenario impacts induced by debris flows and drifting woods. Alert and critical state charts for bridge flood resistant capacity are action indices based on tri-parameters, scouring depth, representative velocity, and stage. Low-expenditure, robust energy-dissipated hydraulic works are introduced for efficiently and effectively eliminating scouring and preventing bridge piers in order to enhance flood resistance. This project contains several innovative ideas that help develop new numerical simulation and inspection techniques in bridge flood resistance. The outcomes of the project will largely enhance the technical level and Taiwan’s visibility on flood prevention technology field. 研究期間:10003 ~ 10007
    關聯: 財團法人國家實驗研究院科技政策研究與資訊中心
    显示于类别:[土木工程學系 ] 研究計畫

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