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一、前言 大型水电站的大坝等重要水工建筑物,经常处于水文、地质条件复杂的地域,坝高库容大,如果失事必定对国计民生造成极其严重的危害,必须采用多种手段全面研究其应力应变与变形状态,分析其超载安全度、稳定性等特性。 散斑干涉计量技术作为结构模型试验光测力学的一门新技术,一经出现,就很快应用于水电工程的大坝与地基变形分析、地下厂房稳定性研究以及坝基的抗滑稳定分析中。实践证明,散斑干涉技术的逐点分析法特别适宜于结构模型实验的变形与稳定研究,具有精度高、设备简易和成果可靠的优点。
I. INTRODUCTION Important hydropower structures such as dams of large-scale hydropower plants are often located in areas with complex hydrology and geological conditions, and the dam height is large. If something goes wrong, it will cause extremely serious damage to the national economy and people’s livelihood. It is necessary to comprehensively study its stress through various means. Strain and deformation status, analysis of its overload safety, stability and other characteristics. As a new technique of structural model test optical metrology, the speckle interference measurement technology has been applied to dam and foundation deformation analysis of hydropower projects, stability research of underground powerhouses, and anti-sliding stability analysis of dam foundations. Practice has proved that the point-by-point analysis method of speckle interferometry is particularly suitable for the study of deformation and stability of structural model experiments, with the advantages of high precision, simple equipment and reliable results.