Comprehensive Optimization Of High Earth-Rock Fill Dam Construction Basing On Genetic Harmony Search Algorithm

Comprehensive optimization of high earth-rock fill dam construction is acomplex nonlinear multi-objective decision-making problem. Dam compactionquality, safety and construction schedule are control objectives of high earth-rock filldam construction, and these three objectives are often interrelated and mutualrestrained. When reducing quality control requirements of dam compaction,construction schedule can be speeded up, but the dam safety may be influenced.Conversely, if blindly increasing the compaction quality (super-standard),construction schedule will be lagged. At the same time, construction appearance andschedule of each dam material zone can bring different impacts on dam settlement,which could even affect the dam safety. Therefore, it is necessary to seek acomprehensively optimal construction schedule with consideration of compactionquality and dam safety under meeting various construction requirements. And thenaccording to the current dam construction process and the present situation of the damsettlement, a reasonable construction schedule adjustment and control scheme can befound. The main contents and achievements of this paper are as follows:(1) With timely acquiring the compacted density and construction schedule ofeach dam material zone basing on the developped digital dam system (DDS), aregression model for high earth-rock dam settlement was established withconsideration of actual compaction quality. The model overcame the limitations ofsome traditional methods, which assume dam materials are homogeneous in the samezone, and thus neglect the spatial difference of material density under actualcompaction quality. To improve the accuracy of the model, a genetic harmonyalgorithm was employed to optimize the regression coefficients of the model.(2) On the basis of quantitatively analyzing the relationship among compactionquality, dam safety and construction schedule, a comprehensive optimum model ofconstruction schedule coupling compaction quality and dam safety was established,and then a fuzzy comprehensive optimization method of high earth-rock fill damconstruction was presented based on Vague Set. Therefore, a genetic harmony searchalgorithm for the model was presented to overcome the shortcomings of thetraditional optimal methods on trapping in local optimum and needing differentiableobjective function, thus can achieve a balanced arrangement among high earth-rock fill dam construction schedule, compaction quality and dam safety.(3) By taking a high earth-rock fill dam project in Southwestern China as anexample to carry out application research, the effectiveness of the model forsettlement calculating was verified. The case study shows that the presented methodcan achieve the best arrangement of high earth-rock fill dam construction schedulewith consideration of compaction quality and dam safety. Therefore, it provides apotential way for high earth-rock fill dam settlement prediction, and optimizing andreal-time controlling of high earth-rock fill dam construction schedule.