【摘要】：針對高心墻堆石壩變形監(jiān)測斷面有限,傳統(tǒng)的單點變形預(yù)測模型難以有效反映壩體整體變形趨勢的特點,通過采用分離型時空模型的構(gòu)建方式,以及基于物理成因分析的單點變形擬合和空間拓展的思路構(gòu)建施工期變形時空預(yù)測模型,能夠克服單點序列模型的某些缺點。基于現(xiàn)有的粗粒土變形計算理論,推導(dǎo)并建立壩體垂直、水平變形單點物理成因模型,在單點物理成因模型的基礎(chǔ)上采用克里金空間插值技術(shù)進(jìn)行空間拓展,構(gòu)建高心墻堆石壩變形時空預(yù)測模型。經(jīng)瀑布溝高心墻堆石壩壩體原觀變形資料分析表明,垂直、水平位移物理成因模型和空間插值模型能較好地模擬和反映測點變形趨勢,精度較高。模型實現(xiàn)了基于監(jiān)測序列的高心墻堆石壩整體變形的3維預(yù)測,較好地描述了大壩3維變形趨勢,對相關(guān)工程具有一定的應(yīng)用和推廣價值。
[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.
【作者單位】： 四川大學(xué)水利水電學(xué)院;中國電建集團(tuán)成都勘測設(shè)計研究院有限公司;
【基金】：國家自然科學(xué)基金資助項目(51109151)
【分類號】：TV541;TV698.11

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