After each field observation, the f

After each field observation, the field observation data in the instrument memory is downloaded into the computer, and then the settlement analysis system st4.3, a professional control network adjustment software developed by Nanjing Hehai University, is used to calculate the elevation and accuracy of each point. For the observation data that the mean square error of height difference of leveling line station after adjustment does not meet the accuracy of secondary settlement observation and deformation measurement (± 0.5mm), rework and retest immediately until the accuracy requirements are met, and then fill the elevation of each observation point after adjustment in the established statistical table to calculate the accumulated settlement and this settlement, Fill in the date, construction situation and other data, and finally form the settlement statistics table (attached Table No: 4).