Abstract：
This paper analyzes the deflection monitoring technology of bridge structure from the angle of theory and actual angle, analysis results are: according to the two hole deflection the continuous deformation of the beam deflection curve equation is relatively simple and practical; the total station distance measurement accuracy, total station deflection observation test precision vernier caliper to measure the value of high precision in measurement, the distance is large, is the effective way to reduce brand placement rules aiming error; in long-span bridge health in the detection, symmetric loading, the maximum deformation of bridge structure deflection at midspan, the most unfavorable loading method, the measured deflection to Less than the results of theoretical calculations, other locations are basically similar.
