| Title | Performance Assessment on Geotextile Protection Construction Method (2/4)- Establishment and Analysis of Numerical Model for Bridge Foundation Scour |
| Dept | Transportation Technology Research Center |
| Year | 2024 |
| Month | 3 |
| Price | 200 |
| Summary | This project is to investigate the application of geotextile in the method of pier foundation protection and finished the laying by on-site geotextile protection construction method on the research subject hereof,which is Dajia River Bridge on National Freeway No. 3, to verify the feasibility of exercising the geotextile protection construction method. Observation was conducted in 2021-2022. In this year (2023), besides the continuation to observe the tripod block stability on the bridge under test and assess the effectiveness, the parameters needed for numeric simulation will also be tested with the results by indoor hydraulic model test to build a 3-D numeric hydraulic model. We aim to discuss the feasibility and configuration methods of simulating the tripod block&geotextile within 3-D numerical hydraulic model.In subsequent projects, this discussion will contribute to utilizing three-dimensional numerical simulations for assessing the effectiveness of on-site geotextile protection, ensuring reasonable simulation analysis results and effectiveness evaluations. This project establishes a comprehensive verification and assessment methodology through indoor hydraulic model tests, on-site laying experiments, and numerical hydraulic analysis models. This methodology can be applied by bridge administrations to the exercise of pier foundation protection construction methods. The results will be provided for the bridge administrations, such as Directorate General of Highways, National Freeway Bureau, Taiwan Railway Corporation,Ltd and county/city governments, which has bridges in the downstream of Dajia River to apply in future. Benefits of Research Results: 1. The verification, by on-site test, on the effectiveness of geotextile in combination with tripod block protection construction method will be provided as reference for bridge administrations in making decision in protection construction methods in future. 2. The building of the tripod block&geotextile 3-D numeric hydraulic model is based on the results of indoor hydraulic model tests at previous stage will be provided varied methods of analysis and effectiveness assessment. Application Availability: 1. The geotextile in combination with tripod block protection construction method proposed in this project has been applied in the laying on Pier P22L,P23L&P27L of Dajia River Bridge on National Freeway No. 3. It serves as a proactive and innovative management approach for bridge management policies. 2. The proposed methodology in this project will be provided as reference and adoption by the Institute and other related agencies. |
| Post date | 2024/03/27 |
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