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原体观测表明,松涛上坝浸润线的位置远高于设计值,人们对此存有疑虑,并担心大坝的安全。本文研究了在不稳定渗流条件下,原体观测资料的整理分析方法,并得到良好的规律,从而论证了松涛土坝没有发生渗流破坏;个别侧压管的水位上升,主要是受不稳定渗流的影响。同时指出,进行无压渗流观测资料的整理分析应考虑不稳定渗流的影响。采用在松涛土坝不同高程埋设渗压计观测浸润线的方法,测得坝体的渗流场,从而揭示了坝的非均质名向异性的影响,并表明,在此条件下用井式测压管观测浸润线的不合理性。有限元计算和电阻网模型试验的结果也表明,坝的各向异性对浸润线的位置有较大的影响。观测、计算和模型试验一致表明,松涛土坝的浸润线较高是客观的存在。
Proto-body observations show that the location of the saturation line at the upper dam of Songtao is much higher than the design value, and people have doubts about this and are concerned about the safety of the dam. In this paper, the method of sorting and analyzing the observation data of raw materials under unstable seepage conditions is studied and a good law is obtained, which proves that no seepage failure occurs in Songtao earth dam. The water level rise of some lateral pressure pipes is mainly affected by unsteady seepage Impact. At the same time, it is pointed out that the analysis of pressureless seepage observation data should consider the influence of unstable seepage. The method of observing the wetting line by embedment piezometer at different elevation of Songtao earth dam is used to measure the seepage field of the dam body, which reveals the effect of anisotropic anisotropy of the dam. It is indicated that under this condition, Irrational line pressure tube observation immersion line. Finite element calculation and resistance net model test results also show that the anisotropy of dam has a significant influence on the position of wetting line. Observations, calculations and model tests consistently show that the higher saturation line of Songtao earth dam is an objective reality.