论文部分内容阅读
根据渗流的基本理论,本文建议用位势、化引渗流量两个无尺度因素分析渗流观测资料,以判断土坝在运行过程中的性状。在渗流场固定时,上述两个因素不随时间而变。它们如果发生变化,则意味着渗流场发生了变化。在一般情况下,如果它们随时间的推移而增大,则说明土坝在运行过程中存在不安全的因素;反之,则说明土坝的运行正常,渗流条件有所改善。对坝基渗流,一般可以认为位势和化引渗流量与上下游水位的变化无关;对坝体渗流,则与上下游的水位变化有关。根据水头及渗流量的观测值,也可以算出渗透系数及渗流坡降等。分析研究这些因素的变化规律,同样可以判断土坝的性状。
According to the basic theory of percolation, this paper proposes to use two scale-free factors to analyze seepage observation data to determine the characteristics of earth dam during operation. When the seepage field is fixed, the above two factors do not change over time. If they change, it means that the seepage field has changed. In general, if they increase with the passage of time, it indicates that there are some unsafe factors in the operation of earth dams; on the contrary, the operation of earth dams is normal and seepage conditions are improved. Generally, it can be considered that the potential flow and the seepage seepage flow have nothing to do with the change of upstream and downstream water levels. The seepage to the dam body is related to the change of water level in the upper and lower reaches. According to the head and seepage of the observed values, but also can calculate the permeability coefficient and seepage gradient. Analysis of the changes of these factors, the same can determine the characteristics of earth dams.