A prism centering rod and a method for measuring the height of the prism centering rod

Abstract

The invention discloses a prism centering rod and a method for measuring the height of the prism centering rod. The prism centering rod includes: a prism, a centering rod body and a jacking device, and the jacking device includes: a connecting frame, a bolt, a support frame and a circle The head level mark, the connecting frame is set on the side of the support frame, the bolt is set on the connecting frame, the round head level mark is set on the end of the bolt away from the support frame, the centering rod body is set on the round head leveling mark, and the prism is set on the centering rod On the body; the height measurement method of the prism centering rod includes: setting the level and the prism centering rod at intervals, adjusting the bolts so that the horizontal line of sight of the level coincides with the center of the prism; removing the body of the centering rod and setting an indium tile ruler on the round head On the level mark, read the height of the prism through the indium tile ruler. The invention reduces the height error of the prism centering pole during the triangular elevation measurement, and ensures the accuracy of the triangular elevation measurement.

Description

technical field [0001] The invention relates to the technical field of elevation measurement, in particular to a prism centering rod and a method for measuring the height of the prism centering rod. Background technique [0002] In the construction of urban rail transit, high-speed railway, and expressway, engineering lines inevitably cross rivers and water systems. The conventional acquisition of elevation references uses electronic levels for leveling measurement. The disadvantage is that it cannot be measured for long distances, so the elevation measurement in crossing rivers is limited. At present, the method of obtaining both sides of the river is to use an ultra-high-precision total station and use the method of triangular elevation to measure. When measuring the elevation, two centering poles need to be erected on both sides of the river. The height of the prism centering pole is generally measured by the reading on the pole or by tape measure or ruler. Directly use ...

AI Technical Summary

Problems solved by technology

Directly use a prism to mark the height of the centering pole, due to manufacturing errors or wear and tear during use, the height error is relatively large, and the measurement accuracy is not high; if you use a tape measure or ruler to measure directly, the actual slope height should be corrected if you consider it accurately, and use The measurement of tape measure or ruler is affected by manual reading, and the error is large, and the accuracy is not high

Images