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建立堤坝饱和-非饱和渗流测试系统,对在水位骤升和水位骤降条件下堤坝进行试验研究。主要测试堤坝模型内各点的非饱和基质吸力,同时观察记录试验过程中实验室内的气温和湿度,探讨水位升降条件下非饱和区负压的变化规律及其影响因素。研究发现,堤坝模型中各点的吸力不仅与水位变化、各点所处的位置有关,同时也受大气温度、湿度、蒸发等外界环境因素的影响;水位变化因素占优还是蒸发因素占优,决定着堤坝非饱和区负压的变化发展方向。
The saturated-unsaturated seepage test system of dykes is established to test the dams under the conditions of sudden rise of water level and sudden drop of water level. Mainly to test the unsaturated matric suction at each point in the dam model, and to observe and record the temperature and humidity in the laboratory during the test, and to investigate the variation law of the negative pressure in unsaturated zone under the condition of water level rise and its influencing factors. The study found that the suction of each point in the embankment model is not only related to the change of water level and the location of each point, but also to the influence of external environmental factors such as atmospheric temperature, humidity and evaporation. The change of water level is dominated by the evaporation factor, Determine the unsaturated zone of negative pressure changes in the direction of development.