静力水准系统在水工模型高程测控中的应用

Application of Hydrostatic Leveling System in Height Measurement and Control of Hydraulic Model

水工物理模型高程测控的精度是直接影响试验成果可靠程度的关键因素之一,模型高程精度必须满足相关标准和试验任务的要求。采用水准仪法测量大型模型高程操作困难,根据连通管原理,利用连通管和辅助器件将模型水位站与高程控制基点连接起来形成静力水准测量系统,按照一定的观测操作程序和计算方法可提高测控精度。经三峡-葛洲坝日调节模型应用证明:该系统具有测量精度高、构造简单、操作维护方便的特点。静力水准测量方法可供其他高程精密测控领域借鉴。

The accuracy of height measurement and control in hydraulic physical model is one of the key factors that directly affect the reliability of test results, the model height accuracy must satisfy the requirement of related code and the experimental task. Sometimes it is difficult to control accuracy in measuring height system of large-scale model by means of level instrument measurement method. According to the connecting pipe principle, the connection of the water level station and the height control point by connecting pipe and ancillary devices in the model will form a static level measurement system, meanwhile according to definite observation procedure and calculation method will increase the measurement accuracy. Through applying to the daily regulation model of the Three Gorges-Gezhouba project, the system has been proved to be characteristic of high precision, simple structure, convenient operation and maintenance, the method provides also a simple and reliable means for precision measurement in related domain.