Abstract:

The theoretical basis for the conclusion that trigonometric leveling can meet the requirements of grade II leveling survey is expounded by deducting the accuracy formula of the trigonometric leveling with fixed total station monitoring points, so as to find a new ground surface settlement monitoring method in busy urban areas where conventional measurement is difficult. The large amount of the measurement data and the comparison and contrast between the monitoring results of the trigonometric leveling with total stations and those of NA2 leveling demonstrate that the method of fixed total station monitoring points can meet the requirements of the ground surface settlement monitoring in busy urban area and is worth to be popularized.

Key words: total station, fixed monitoring point, trigonometric leveling, ground surface settlement monitoring