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Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Online from: 1954
Subject Area: Mechanical & Materials Engineering
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High-speed flow erosion test study on roller compacted concrete dam during construction
| Title: | High-speed flow erosion test study on roller compacted concrete dam during construction |
|---|---|
| Author(s): | Xin Wang, (Hydraulic Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, People's Republic of China and State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing, People's Republic of China), Shaoze Luo, (Hydraulic Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, People's Republic of China and State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing, People's Republic of China), Qiang Yuan, (Hydraulic Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, People's Republic of China and State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing, People's Republic of China) |
| Citation: | Xin Wang, Shaoze Luo, Qiang Yuan, (2012) "High-speed flow erosion test study on roller compacted concrete dam during construction", Anti-Corrosion Methods and Materials, Vol. 59 Iss: 4, pp.163 - 169 |
| Keywords: | China, Concrete, Dams, Erosion, Erosion test, High-speed flow, Hydraulic structures, Impact apparatus, Roller compacted concrete |
| Article type: | Research paper |
| DOI: | 10.1108/00035591211241989 (Permanent URL) |
| Publisher: | Emerald Group Publishing Limited |
| Acknowledgements: | The authors are grateful for the financial support provided by the 11th Five Years National Key Programs for Science and Technology Development of China (No. 2009BAK56B04). They would like also to thank anonymous reviewers for their useful comments. |
| Abstract: | Purpose – A new roller compacted concrete dam of Fengman hydropower station was determined to be built in the toe of the old dam which had been identified as a dangerous dam. The new dam during construction would be impacted by the high-speed flow discharged from the old dam. This is an important problem met for the first time in China, which would affect the whole project construction. The purpose of this paper is to describe a series of erosion experiments of the new dam material. Design/methodology/approach – A kind of high-speed flow erosion test apparatus was developed for erosion experiment of the new dam material. The maximum jet velocity was up to 40?m/s and the section area of the nozzle was 25?cm2. In the process of experiments, the equipment showed its good performance. Erosive wear tests of two types of materials used in the new dam, a roller compacted concrete and a distorted concrete with four kinds of ages were carried out with the flow velocity in the range of 30-35?m/s. Findings – Erosion parameters and erosion laws of the two types of concretes with different ages were obtained, and a general relationship had been found between erosion rate and flow velocity: with velocity exponent between 3.33 and 3.93. It was also concluded that the erosion resistance of the distorted concrete was better than that of the roller compacted concrete and the mechanics properties of the concretes of over 14 days age was influenced slightly by water impacted. Originality/value – The test results would play a practical technique guide role for the safety of this project during construction in the flood season. |
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