本研究進行泥漿體之坍流實驗，量測泥漿體坍流及坍落過程，並探討其坍流參數與流變參數之關聯性。坍流試驗使用平截圓錐坍度桶，其頂端直徑為5 cm、底端直徑為10 cm、高度為15 cm。本研究自行設計坍流試驗操作支架，用滑輪穩定坍度桶在實驗過程當中的垂直拉升，坍度桶中央設置一固定鐵柱以及沿鐵柱上下移動之圓盤，便於量測坍落過程之設施，在底板畫設標線便於量測坍流過程之設施，並使用高速攝影機拍攝坍落及坍流過程。藉由以上設備量測泥漿體之坍度參數(坍流度、坍落度、坍流時間、坍落時間)。流變實驗使用DV-III型水平旋轉式流變計，量測泥漿體之流變參數(屈服應力、黏滯係數)。實驗使用的泥砂為粉沙材料，用水混合別調配成為五種體積濃度之泥漿體，進行坍度實驗與流變實驗。
實驗結果顯示：(1) 當試體之體積濃度較高，其坍流度及坍落度較小且坍流時間較短，而坍落時間則較長；(2) 坍落度與坍落時間呈線性負相關，而坍流度與坍流時間則呈線性正相關；(3) 五種不同體積濃度之試體的坍落時間皆大於坍流時間，此顯示坍流停止時坍落依然還在進行當中；(4)坍流度及坍流時間與屈服應力及黏滯係數皆呈指數型負相關，當試體具有較高屈服應力及黏滯係數，其坍流度較小且坍流時間較短；(5)坍落過程之曲線近似於S型，由結果可觀察到坍落過程之實驗曲線與理論曲線在坍落初期階段有差異，其原因可能為理論分析有過度簡化的情況所致。

In this study, the slump-flow tests of the sediment slurries were carried out, the slump-flow process and slump process of the sediment slurries were measured and analyzed, and the correlation between the slump parameters and the rheological parameters was discussed. The slump cone in the shape of a truncated metal cone, open at both ends, is equipped with the set-ups. The internal diameter of the slump cone is 100 mm at the base, 50 mm diameter at the top, and has a height of 150 mm. This set-up comprises 1) an iron main frame to which a pulley system is adapted that allows a smooth lifting of the slump cone; 2) An axial vertical rod and an acrylic plate that could slide down the rod for measuring the slump process; 3) A non-absorbent bottom plate with marking line for measuring the slump-flow process; 4) Two highspeed camera to record the slump and slump-flow process. Using the above equipment to measure the slump parameters (slump-flow, slump, slump-flow process, slump process) of the sediment slurries. The rheometer used in the rheological experiment is the “DV-III horizontal rotary rheometer”, which is used to measure the rheological parameters (yield stress, viscosity) of the sediment slurries. The silt material used in the experiment is reservoir silt. It's mixed with water to form sediment slurries with five volume concentrations for slump experiments and rheology experiments.
After the experiment, the results show that: (1) When the volume concentration of the sample is higher, the slump and slump are smaller, the slump time is shorter, and the slump time is longer; (2) Slump and slump time are linearly negatively correlated. Slump-flow and slump-flow time are linearly positively correlated; (3) The slump time is greater than the slump-flow time at each volume concentration. The slump is still in progress when the slump-flow stopped; (4) The slump flow and slump time are exponentially negatively correlated with the yield stress and viscosity. When the specimen has higher yield stress and viscosity, the slump flow is smaller and the slump time is shorter; (5) The curves of the slump process are similar to the S-shape. From the results, it can be observed that the experimental curve of the slump process and the theoretical curve are different in the early stage of the slump, which may be caused by the oversimplification of the theoretical analysis.

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