丰满大坝变形激光观测系统基准点变位的理论分析

大坝观测系统设置的基准点,在库水位变化等外界因素影响下将产生变形。不同位置的基准点,变形的数值是不同的,它对观测精度将产生不同程度影响。基准点位置不同又涉及到基准点设置本身的技术和经济问题。本文结合丰满大坝激光观测系统基准点布置,通过理论分析计算,对大坝两端坝头、地基连同部分坝体的变位情况获得清晰的概念。评价了现有激光观测系统布置对观测精度的影响,并为倒垂基准点的选择提供了理论依据。

Theoretical Analysis of the Base Point Displacements of the Laser Observation System for the Feng-Man Dam

Under the influence of the change of the reservoir level and other factors, the observation base points for a dam's measurement system will have some deformation. The differently located base points have different measurement values that will influence the measurement accuracy to some extent, The difference in location of the observation base points, in turn, will effect tile technical and economical problems of the base point location itself. Using the data of the base point location for the laser measurement system of the Feng-Man dam deformation, this paper has given a clear concept about the condition of deformation in the dam abutments and its foundation through theoretical analysis and calculations. The influence of the location of the existing laser observation system on the measurement accuracy is also estimated and a theoretical basis for selecting the location of the counter pendulum measurement base points is given too.