摘要
通过碾压正交试验,在定量分析碾压参数对土石坝料压实质量影响的基础上,建立综合考虑土石坝施工效率、压实密度和质量保证的碾压参数多目标优化模型,提出用于求解该优化模型的t分布变异烟花算法,以确定经济合理的碾压参数。该算法可以减小开展碾压试验的工作量,有助于寻得合理的碾压参数组合方案。工程实例分析表明,改进烟花算法相较传统优化算法收敛速度更快,寻优效率和稳定性更好;采用改进烟花算法优化的碾压参数,堆石坝料的压实密度和孔隙率均满足设计要求。
On the basis of quantitatively analyzing the relationship between compaction quality and compaction parameters, a comprehensive optimizing model with objectives of construction effectiveness, compacted density, and quality guarantee rate has been established in this paper. An adaptive t distribution mutation-firework algorithm(ATM-FWA) for the model was presented to achieve the economically reasonable compaction parameters for the construction of high earth-rock dam. The proposed method can contribute to search a reasonable compaction parameter scheme with less field compaction tests. A case study shows that ATM-FWA has more advantages than the traditional optimal methods in the convergence performance, searching effectiveness, and solution stability. The compaction density and porosity of earth-rock dam material using the optimized compaction parameters can satisfy the design requirement. Thus, the proposed method provides a new way for the roller selecting and the compaction parameters optimization in the construction of an earth-rock dam.
引文
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