摘要： 本文介绍用激光真空照准法浏定大坝水平变形的基本原理，讨论了应用中遇到的问题及采取的措施，同时给出了现场应用所获得的效果。

Abstract: In this paper, the fundamental principle of measurement of dam deformation by vaccum three point method is introduced; Problems are discussed and improving method is made. Finally, applying effects in the practical measurement have been given.?