| Summary: | 博士 === 國立成功大學 === 系統及船舶機電工程學系碩博士班 === 101 === The southern region of Taiwan mainly refers to Chia-I, Tainan and Kaohsiung metropolis, and the main reservoirs are Tsen-weng and Woo-Sentou reservoirs located at the border of Chai-I and Tainan. However, since there is no reservoir in Kaohsiung, the water for the habitants and industries in the metropolis is dependent on the Ping-Ding water treatment plant to pump water from the weir constructed in Kao-Ping River. In the rainy season, since the concentration of mud in the water pumped from the Kao-Ping river is too high (greater than 50,000 NTU) for the water treatment plant, it is required for the supply of clean water. To solve the last problem, a pipeline between Nan-Hua reservoir and Kao-Ping-River Weir is built to convey a part of water of Tsen-weng and Nan-Hua Reservoirs
This paper aims at the study of problems regarding the management and maintenance of facilities for water supply. The first problem is regarding the survey of slurry accumulation near the reservoir entrance. The second problem is regarding the safety of pre-stressed cylinder concrete pipes (PCCP’s). The third problem is regarding the vibration behaviors of the pipeline between Nan-Hua reservoir and Kao-Ping-River Weir. The purpose of this thesis is to find the solutions for the problems regarding the management and maintenance of water-supply facilities for the reservoirs located at southern region of Taiwan. To the last end, the following approaches are used:
For the first problem, a solar-power boat is developed; it can be easily used to measure the slurry accumulation near the reservoir entrance so that one may provide the information regarding the water supply, mud sediment, ect.
For the second problem, the non-destructive and destructive tests on the large-diameter PCCP composed of the pipeline are performed by using the strain gages.
Based on the above test results and the inspection results using Remote Field Eddy Current/Transfer Coupling (RFEC/TC) technique, one can predict the safety condition of the pipeline and present the schedule of repair or replace to assure the safety of the water-conveying pipeline.
For the third problem, this thesis presents a simple analytical method to calculate the lowest several natural frequencies and associated mode shapes of a fluid-conveying pipeline. In which, the effects of flow velocity of water, the internal pressure, the Coriolis force and axial load are taken into considerations.
It is believed that the research results of this thesis will be useful for the management and maintenance of the water-supply facilities.
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