Experimental Study On Inrruptive Protection For Pair Of Piers Scour Countermeasures

• Main Author: 洪睦翔
• Other Authors: 陳文俊
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/94724684337796678562

碩士 === 國立嘉義大學 === 土木與水資源工程學系研究所 === 101 === Due to climate change In recent years, extreme hydrological events caused rivers flow intensified the pier security to be a greater challenge, piers security is now mainly very important issue.This study is hydraulic model tests and numerical simulation to explore the piers erected through the sluice-protection workers in front of the double pier scour protection benefit test major change because the protection workers thickness and water permeability, the thickness of the protection work of 0.4cm, 0.8cm permeability rate to 20%, 40%, 60%, as the test variables. Various test results in accordance with the pier nose scour depth, pier scour depth, maximum scour depth and explore the terrain changes in circumstances by erosion and deposition contour graphics. Seeking the best protection workers laid configuration compared with simulation results. The trial results showed, permeable sluice protective workers in a variety of different combinations, a permeability rate of 60% of the best protective effect, a permeable rate of 60% in the setting of both the thickness of the protective effect of 0.4cm preferably. Protection of workers in the permeation rate of 20% under the conditions too dense water permeability but cause more serious erosion. Through the sluice protection workers 0.4cm-60% of the test arrangement, local scour protection around the pier, protective maximum scour depth of up to 64%.