考虑实时施工质量因素的高心墙堆石坝沉降变形分析

发布时间：2018-05-02 07:15

本文选题：高心墙堆石坝 + 沉降变形　；参考：《水力发电学报》2017年12期

【摘要】：现有将高心墙堆石坝沉降分析统计模型分为填筑因素、时效因素与水压因素的研究通常将坝体同一分区视为均质体,缺乏考虑大坝碾压施工质量差异导致填筑体非均质性对沉降变形影响的研究,因此从高心墙堆石坝填筑体受力变形分析出发,分析了考虑实时施工质量因素影响的填筑因素和时效因素,并结合水压因素,建立考虑实时施工质量因素的高心墙堆石坝沉降变形分析模型。针对高心墙堆石坝沉降变形过程的动态性,将该多参数非线性模型与M5’模型树相结合,利用M5’模型树解决全局非线性问题的优势,结合粒子群算法求解多参数问题速度快、收敛快的优点,实现对高心墙堆石坝沉降过程的拟合与预测,并与未考虑实时施工质量因素的传统分析模型以及多元线性回归分析模型进行对比。分析结果表明,考虑实时施工质量因素的高心墙堆石坝沉降变形分析模型的绝对差值与误差平方和均最小,而各模型关联度差异较小,模型综合指标最优。考虑实时施工质量因素的高心墙堆石坝沉降变形分析为客观分析大坝沉降提供了可靠的途径。
[Abstract]:The present statistical model of settlement analysis of high core rockfill dam is divided into filling factors. The study of aging factor and water pressure factor usually regard the same zone of dam body as homogeneous body. There is no research on the influence of the heterogeneity of the fill body on the settlement deformation due to the difference in the quality of the dam roller compaction, so the stress deformation analysis of the fill body of the high core rockfill dam is carried out. This paper analyzes the filling factors and aging factors considering the factors of real time construction quality, and establishes an analytical model of settlement and deformation of high core rockfill dams considering the factors of real time construction quality. In view of the dynamic process of settlement and deformation of high core rockfill dam, the multi-parameter nonlinear model is combined with M5'model tree, the advantage of M5'model tree to solve the global nonlinear problem is used, and the particle swarm optimization algorithm is used to solve the multi-parameter problem. With the advantages of fast convergence, the settlement process of high core rockfill dam can be fitted and predicted, and compared with the traditional analysis model and multivariate linear regression model without considering the factors of real time construction quality. The analysis results show that the absolute difference and the sum of square error of the analysis model of settlement and deformation of high core rockfill dam considering the factors of real time construction quality are the smallest, while the correlation degree of each model is small, and the comprehensive index of the model is the best. The analysis of settlement and deformation of high core rockfill dam considering the factors of real time construction quality provides a reliable way to objectively analyze the dam settlement.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室;
【基金】：国家自然科学基金(51439005;51621092;51339003)
【分类号】：TV698.11

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