高心墙堆石坝施工期变形时空预测模型研究
发布时间：2019-04-28 07:57
【摘要】：针对高心墙堆石坝变形监测断面有限,传统的单点变形预测模型难以有效反映坝体整体变形趋势的特点,通过采用分离型时空模型的构建方式,以及基于物理成因分析的单点变形拟合和空间拓展的思路构建施工期变形时空预测模型,能够克服单点序列模型的某些缺点。基于现有的粗粒土变形计算理论,推导并建立坝体垂直、水平变形单点物理成因模型,在单点物理成因模型的基础上采用克里金空间插值技术进行空间拓展,构建高心墙堆石坝变形时空预测模型。经瀑布沟高心墙堆石坝坝体原观变形资料分析表明,垂直、水平位移物理成因模型和空间插值模型能较好地模拟和反映测点变形趋势,精度较高。模型实现了基于监测序列的高心墙堆石坝整体变形的3维预测,较好地描述了大坝3维变形趋势,对相关工程具有一定的应用和推广价值。
[Abstract]:In view of the fact that the deformation monitoring section of high core rockfill dam is limited and the traditional single point deformation prediction model is difficult to reflect the whole deformation trend of dam body effectively, the separated spatio-temporal model is adopted to construct the model. In order to overcome some disadvantages of single-point sequence model, a spatio-temporal prediction model of deformation during construction period is constructed based on single point deformation fitting and spatial expansion based on physical origin analysis. Based on the existing calculation theory of coarse grained soil deformation, the single point physical genesis model of vertical and horizontal deformation of dam body is derived and established. On the basis of single point physical genetic model, Kriging spatial interpolation technique is used to expand the space. A spatio-temporal prediction model for deformation of high-core rockfill dam is established. Through the analysis of the original deformation data of Pubugou high-core rockfill dam, it is shown that the physical origin model and spatial interpolation model of vertical and horizontal displacement can simulate and reflect the deformation trend of the measuring point well, and the accuracy is high. The model realizes the 3D prediction of the whole deformation of the high core rockfill dam based on the monitoring sequence, and describes the trend of the 3D deformation of the dam well, which has certain application and popularization value for the related projects.
【作者单位】： 四川大学水利水电学院;中国电建集团成都勘测设计研究院有限公司;
【基金】：国家自然科学基金资助项目(51109151)
【分类号】：TV541;TV698.11
本文编号：2467462
[Abstract]:In view of the fact that the deformation monitoring section of high core rockfill dam is limited and the traditional single point deformation prediction model is difficult to reflect the whole deformation trend of dam body effectively, the separated spatio-temporal model is adopted to construct the model. In order to overcome some disadvantages of single-point sequence model, a spatio-temporal prediction model of deformation during construction period is constructed based on single point deformation fitting and spatial expansion based on physical origin analysis. Based on the existing calculation theory of coarse grained soil deformation, the single point physical genesis model of vertical and horizontal deformation of dam body is derived and established. On the basis of single point physical genetic model, Kriging spatial interpolation technique is used to expand the space. A spatio-temporal prediction model for deformation of high-core rockfill dam is established. Through the analysis of the original deformation data of Pubugou high-core rockfill dam, it is shown that the physical origin model and spatial interpolation model of vertical and horizontal displacement can simulate and reflect the deformation trend of the measuring point well, and the accuracy is high. The model realizes the 3D prediction of the whole deformation of the high core rockfill dam based on the monitoring sequence, and describes the trend of the 3D deformation of the dam well, which has certain application and popularization value for the related projects.
【作者单位】： 四川大学水利水电学院;中国电建集团成都勘测设计研究院有限公司;
【基金】：国家自然科学基金资助项目(51109151)
【分类号】：TV541;TV698.11
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，本文编号：2467462
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