Oppose earth flow hollow cone type bridge pier column

• Main Authors: Hong-Yi Wu, 吳泓毅
• Other Authors: Mau-Song Sheen
• Format: Others
• Language: zh-TW
• Published: 101
• Online Access: http://ndltd.ncl.edu.tw/handle/86581426636837902193

碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 100 === This research is to the develop a oppose earth flow and scouring can Supplement foundation cover soil of automatically the hollow cone type bridge pier column, use inclination of 82° to 45° for the six hollow cone type bridge pier column specimens(one of the solid cone type) and traditional cylindrical type bridge pier to proceed driftwood impact test. Use the energy of the different water level elevation to the driven the woodblock to impact specimen, and analysis of the impact impulse and specimens deflection circumstances and specimens floating phenomenon and the upstream basic to the soil scour amount, find the oppose driftwood impact Cone level of best angle of the hollow cone type bridge pier column. Test to narrow the scale of 1:100 steel wire mesh concrete bridge pier column, analysis in the impact of impulse 0.43 ~ 1.03 kg-cm / s (an average of 0.73 kg-cm/s) (about 209.6 to 504.6 kg of actual driftwood, impact the speed of 2 m / s), the about the same volume and weight to the seven different inclination specimen to the X, Y, Z to deflection circumstances. Test analysis find that basis of soil scour in the three upstream water level height H and the same test distance L and three downstream water level height h for the (H-h) / L = 0.126and (H-h) / L = 0.151 and (H-h) / L = 0.174 of slope relationship the following, the basis of soil by scour into the heap. oppose earth flow and driftwood hollow cone type bridge pier column model test results analysis bridge pier specimens to bear driftwood impulse and deflection circumstances and the floating phenomenon and soil scour amount, and then consideration production costs and the watercourses area occupied, the proposed oppose earth flow hollow cone bridge pier column the best angle of 70°.