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里石门拱坝的垂线观测资料,其完整性在国内尚属少见。本文通过比较各种挠度曲线和拱圈变形曲线,得出坝体位移的变化规律,发现位移最大值不一定在坝顶,也不一定在拱冠,拱圈变形曲线经常为双峰形。对它作定量分解后,发现在很多部位,温度位移常大于水压力位移。这些规律对同类型薄拱坝有参考价值。该拱坝的切向位移并非随机值,有其固有规律性。大坝在封拱之后、整体向右岸侧移,其成因经分析认为系二岸温差所致,并将引起较大的坝体应力。这应引起设计、施工方面的注意。
The vertical line observation data of Lishimen Arch Dam is not uncommon in China. In this paper, by comparing various deflection curves and deformation curves of arch ring, the variation law of displacement of the dam body is obtained. It is found that the displacement maximum value is not necessarily at the crest of the arch, nor is the deformation curve of arch crown and arch ring often bimodal. Quantitative decomposition of it, found that in many parts, the temperature displacement is often greater than the water pressure displacement. These rules have the reference value for the thin arch dam of the same type. The tangential displacement of the arch dam is not random and has its inherent regularity. After the closure of the arch dam, the overall lateral displacement to the right bank, the cause of the analysis that the temperature caused by the second shore, and will cause a larger dam stress. This should attract design, construction attention.