贺昌海, 王木涵, 李亚
AuthorsHTML:贺昌海, 王木涵, 李亚
AuthorsListE:He Changhai, Wang Muhan, Li Ya
AuthorsHTMLE:He Changhai, Wang Muhan, Li Ya
Unit:武汉大学水资源与水电工程科学国家重点实验室，武汉430072
Unit_EngLish:State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
Abstract_Chinese:在高山峡谷地带修建水电工程时, 采用修建分流挡渣堤方法来满足工程施工和环境保护的要求．以某实际工程为例, 为了减少挡渣堤工程量和保证其过水安全, 用CATIA建立了三维几何模型, 并将模型导入Flow-3D中, 采用RNG k-ε 紊流模型, 用TruVOF方法进行自由表面的追踪, 针对101 m、78 m、67 m 3种平台长度进行了三维数值模拟, 初步确定平台长度78 m; 对优化设计方案进行了详细的物理模型试验, 计算与试验结果对比表明, 计算对分流挡渣堤的模拟具有较高参考价值, 优化方案的填筑总量约43×10⁴ m?, 比平台长度101 m方案减少约5×10⁴ m?, 降低了分流挡渣堤的施工风险; 试验表明, 分流挡渣堤虽出现局部冲刷, 但整体稳定性良好; 进一步的试验表明, 采用综合护面措施后, 可以保证分流挡渣堤的过水安全．该研究为分流挡渣堤体型优化提供了新的方法, 具有一定的参考价值和良好的应用前景．
Abstract_English:In building hydropower project in alpine and gorge region，diversion cofferdam is utilized to meet the demand of construction and environmental protection. A practical project taken as an example，in order to reduce the work amount and guarantee the safety of diversion cofferdam in overflowing state，CATIA was utilized to build a 3D geometry model which was guided into Flow-3D. RNG k-ε turbulence model was selected，TruVOF was used to trace free surface，and then three-dimensional numerical simulation was conducted under three platform lengths of 101 m，78 m，and 67 m，respectively. The platform length of 78 m was preliminarily determined according to the computational results. Detailed physical model tests were done on the optimized design scheme. The comparison result between calculation and test data showed that the calculation model had a high reference value. In the optimized design scheme，the gross of rock fill is about 43×10⁴ m?，5×10⁴ m? less than that of the original scheme(the platform length of 101 m)，thus the construction risk is lowered. The physical model tests showed that the diversion cofferdam was stable on the whole although some parts of the diversion cofferdam were washed out. Further physical model test research indicated that the comprehensive measures for surface protection would guarantee the safety of diversion cofferdam in overflowing state. The research comes up with a new method for optimizing the body type of diversion cofferdam，which has both reference value and application prospect.
Keyword_Chinese:分流挡渣堤; 体型优化; CATIA; Flow-3D; 三维数值模拟; 物理模型试验
Keywords_English:diversion cofferdam; shape optimization; CATIA; Flow-3D; three-dimensional numerical simulation; physical model test

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