How theodolites are mounted: stages and basics
The theodolite is installed on the fixed points and measure the horizontal angles between the oriented directions to the brackets with several techniques (the number of controlled points is selected in advance). These angles will be initial for further observations in the concrete process.
When checking the verticality, the same horizontal corners are measured and compared with the corners measured before the start of concreting. By the difference in the angles of the first and next cycles, the angular size of the displacement of brackets is determined, rigidly connected to the circles and formwork, and calculate the angle of the angle for each bracket.
In this case, take into account the sign of displacement relative to the line of visualization. The results are applied to the executive scheme. You should dwell on the value of the results of geodetic measurements during the construction of structures in sliding formwork.