The Effect of Pier Scour in a Submerged Overfall and Fundamental Study of Protection
| Autor: | Ta-Chih Lin, 林達志 |
|---|---|
| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 This paper mainly inquire about scour depth around a pier in a submerged overfall, and compare with the experiment by Chang(2001) to discuss the difference of scour depth around a pier in a submerged overfall in two kind of flow rate. From the experiment and the result of analysis, we know that scour depth around the pier when located in upstream balance position is less than a single pier’s scour depth. And scour depth around the pier when located in downstream balance position is deeper than a single pier’s scour depth. And scour depth around the pier when it’s located in the deepest position on the scour hole is large than the sum of single pier’s scour depth and single waterfall’s scour depth. Furthermore, we use “C.K Artificial Water Grass” for protection that has the function of diversion and making the flow steady. We choose “diameter of diversion cordage” and “length of diversion cordage” for controllable factors. By the results of experiment, the effect of protection is getting better when “diameter of diversion cordage” is smaller or “length of diversion cordage” is bigger. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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