Preliminary study on Effects of scouring on pile Foundation Performance

• Main Author: 尤俊傑
• Other Authors: Lin San-Shyan
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/80634798214097210871

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 101 === Taiwan is located between The Philippines plate and The Eurasian plate. Due to orogenesis makes the Central Range of Taiwan becoming long and narrow from north to south. The river distribute east and west. Because Taiwan is located in typhoon area, when typhoon pass through, it makes heavy rainfall. This heavy rainfall often causes deluge, that makes river bed scouring and soil loss . As a result the corssed-river bridges are damaged. Due to the serious erosion problem, the foundation of bridge exposed above the river bed for several meters in all Taiwan rivers. When typhoon or severe thunder storm come , the disasters of broken bridge can not be ignored. In order to understand the situation ,that the flow force applied to on the pile foundation . This study set a different flow velocity (3m / s, 5 m / s and 7 m / s), the river water level (3 m, 5 m, 7 m) and scour depth (1 m, 2 m, 4 m, 7.5 m) total of 36 kinds of situation, and use finite element method (FEM) Plaxis 3D. Finally ,we can know the displacement and stress on pile foundation under the water erosion.