Construction of railroads, highway surveying work what

The main contents of the railroad project construction measurement are: review line alignment measurement, pile location measurement, roadbed slope sampling, axial positioning of bridges and tunnels, station house axial determination, as well as all kinds of engineering foundation construction measurement of the railroad.

After the highway construction project won the bid, the construction of the preparatory stage of the measurement work are: the preparation of the measurement work planning; handover stakes before the start of construction; control points of the re-testing, encryption; sampling and checking and auditing of earthwork quantities.

Expanded

Construction measurement should follow the principle of "from the whole to the local, the first control and then detail", that is, first in the construction site, according to its natural geographic conditions and the existing control network, the establishment of different forms of plane control.

Elevation, try to use the original level base point, and in the addition of some level points, as the basis for elevation control and elevation measurement. Construction survey is the design of the points on the map, the length of the line, angle and elevation measured on the ground.

The quality and design accuracy of construction measurement will directly affect the construction quality of the project. Therefore, before the construction survey, the surveyor must understand the design content, familiar with the design drawings, check the plan coordinates of the main points on the map, size, angle, elevation and their geometric relationship with each other, and calculate the construction measurement of the sampling data, according to the progress of the project, at any time for the construction of the sampling.