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本文对溪洛渡拱坝蓄水阶段原型监测成果进行归纳总结,论术了监测数据的同步性、连续性、规律性和收敛性特征,初步评价了大坝的运行状态,基于数值仿真反馈分析,研究了大坝受力变形特性的机理,重点阐述了拱坝库盆沉降、上部谷幅收缩效应,分析了坝踵压应力的合理性。结果表明:溪洛渡拱坝初期蓄水期拱坝变形与水库水位变化过程一致,连续变化且符合客观规律,整体时效变形呈现收敛态势;由于溪洛渡特殊的地质条件,库盆压力对大坝变形影响较大,但不影响整体安全稳定;拱坝应力分布良好,坝肩推力在坝基内扩散明显,处于可控状态。综合分析认为,溪洛渡拱坝蓄水过程安全可靠。
This paper summarizes the results of the prototype monitoring of the Xiluodu arch dam during its storage phase, discusses the synchronism, continuity, regularity and convergence of the monitoring data, and initially evaluates the dam’s operation status. Based on the numerical simulation feedback analysis, The mechanism of dam deformation under stress and deformation is discussed in detail. The settlement effect of the upper and lower valleys in the dam and the shrinkage effect of the upper valley are mainly discussed. The rationality of the compressive stress at the heel of the dam is analyzed. The results show that the deformation of arch dam during the initial storage period of Xiluodu Arch Dam coincides with the changing process of reservoir water level, which changes continuously and conforms to the objective law. The overall aging deformation shows a convergent trend. Due to the special geological conditions of Xiluodu, the influence of reservoir pressure on dam deformation Large, but does not affect the overall safety and stability; Arch dam stress distribution, dam thrust in the dam foundation diffusion was obvious, in a controlled state. Comprehensive analysis shows that the Xiluodu dam water storage process is safe and reliable.