小型水电站控制测量方法研究

结合小型水电站所处的地形条件和工程特点，通过对勘测阶段常用的GPS结合测距支导线法、狭长型闭合导线法、双支导线法，以及单支导线法等几种控制测量方法的对比研究和精度分析，表明各种方法在不同的地形环境中有各自的适用性。在单个隧洞长度少于2km的小型水电工程项目中，选择测距单支导线，是一种既省时省力，又能保证精度的有效方法，而测距三角高程法是高程控制测量的首选。

Discussion on the control survey method of small-scaled power station

Combining the topographic condition and project characteristic of small--scaled power station, this paper indicates the respective serviceability in the different landform environment through the contrast research and the precise analysis of several kinds of control measuring methods, such as the GPS incorporated open traverse method, the slender configuration closed traverse method, the double traverse method as well as the single traverse method and so on. For a single small water and hydropower engineering project with tunnels no longer than 2 km, it is an effective way of time saving and precision guaranteeing to chose the EDM single open traverse, while the first choice for controlled elevation survey is the EDM trigonometric leveling method.