潭岭水库大坝扬压力监测数据及模拟分析

Monitoring data and simulation analysis of Tanling Reservoir dam uplift pressure

通过对潭岭水库大坝坝基扬压力观测数据进行整理分析,采用作图分析及特征值分析方法,对大坝结构性态进行分析。结果表明,大坝扬压水位一年中高水头一般出现在夏季,低水头一般出现在冬季。各测点扬压水位的影响因素有库水位、降雨、气温和时效。越靠坝上游面测点的扬压系数越大,扬压系数符合重力坝建基面渗透规律,监测值显示扬压力正常。水库大坝变形符合一般规律并趋于稳定,大坝渗流场基本稳定,扬压力变化基本正常,整体上未出现危及大坝安全的征兆。

The dam foundation pressure of a certain reservoir is observed and recorded.Based on the analysis of the monitoring data,the method of mapping analysis and characteristic value analysis is used to analyze the structural behavior of the dam.The analysis results show that the high water head of the dam generally occurs in summer during the year,and the low water head generally occurs in winter.The influencing factors of the uplift water level at each measuring point are reservoir water level,rainfall,temperature and aging,with temperature and aging being the main factors.The higher the uplift coefficient of the measuring point on the upstream surface of the dam is,the greater the uplift coefficient conforms to the seepage law of the foundation surface of the gravity dam,and the monitoring value shows that the uplift pressure is normal.The deformation of the reservoir dam conforms to the general law and tends to be stable,the seepage field of the dam is basically stable,and the uplift pressure changes basically normal.On the whole,there are no signs of endangering the safety of the dam.