Summary of IOT Publications
| Title | Analysis of Disasters of Cross-River Bridge Foundations in the Western Area of Taiwan and the Establishment of Data Base System for Their Protection |
|---|---|
| Dept | IOT |
| Year | 1998 |
| Summary | The level of river bed in the main channels of most rivers in the western area of Taiwan has lowered seriously during the last decade. The key factors were : (1) the construction of many (sabo) dams and weirs at upstream watersheds (sediment supply to downstream reach was thus largely reduced); (2) long-term overmining of sand and stone along the middle and downstream basins; and (3) the general scour of torrential flood induced by heavy rain or typhoon. From July 31 to August 1, 1996, Typhoon Herb swept across Taiwan Island, bringing heavy rain and triggering floods that left widespread damages of cross-river structures, such as bridge, bed protection works, and pipeline, etc. The disasters of bridge and bed protection works caused by the scour of torrential floods during the period ranging from the passage of Typhoon Herb to August 31, 1997, which investigated in the present study. The purposes of this study are to make clear the scour mechanism were causes various damages of these structures, to classify the failure modes of different works, to propose some countermeasures or ideas for engineering use, and to establish a data-base system for bed protection works of cross-river bridge foundations. The present study is expected to promote exchange of experiences and techniques concerning disaster prevention or mitigation for bridge foundation and for their bed protection works. |
| Post date | 1998-06-01 |