新导线法测定重力拱坝位移设计理论分析与模拟计算

A new traverse method for tracing displacement of a gravity arch dam

在设计某重力拱坝145监测线的过程中,作者提出了一种新的导线法,来监测重力拱坝坝体的位移。文章介绍了该导线法的布设与观测方案;导线法的点位误差——精度分析;导线法的偶然误差在待定参数及其函数上的分布规律——主分量分析;导线法在给定误差概率下,通过统计检验所能发现各点(坝段)径向位移的下界值——灵敏度分析。用数学模型扭曲法对该导线法进行了仿真试验研究,进一步检验了上述分析结果的准确性,从而保证了位移监测设计的严密性、预见性和实用性。作者试图将近代工程测量控制网的理论和方法、应用于变形监测网的设计,为推动变形监测系统设计理论的发展作了一点尝试。

A new traverse method for tracing displacement of a gravity arch dam has been de-veloped. The layout and observation scheme of the traverse, relevant point positional error-ac-curacy analysis, main component analysis defining accidental error distribution principle and sen-sitvity analysis searching for cower limit of probable radial displacement are described in this pa-per. Calculation for a mathemational model simulating the use of this new traverse method justi-fies its applicability in design of a displacement monitoring network.