Fabrication method of forced centering observation pillar for precision engineering measurement and observation pillar

Abstract

The invention discloses a fabrication method of a forced centering observation pillar for precision engineering measurement and the observation pillar. The fabrication method comprises the steps that a pile hole is dug manually and downward to a bed rock; a steel reinforcement cage is placed in the pile hole in a hanging manner; the bottom of the steel reinforcement cage is placed on the bed rock; the height-set steel reinforcement cage is reserved above the ground surface; an underground concrete pile is poured in the pile hole; after the underground concrete pile is solidified, a formwork is erected and an overground concrete column is poured on the steel reinforcement cage reserved above the ground surface; a forced centering bolt is embedded in the center of the top end of poured concrete; the diameter of the forced centering bolt is required to be matched with a bolt hole at the bottom of an instrument base; a forced centering disk is embedded at the top end of the concrete embedded with the forced centering bolt; and the forced centering bolt penetrates through the center of the forced centering disk. According to the fabrication method of the forced centering observation pillar for the precision engineering measurement and the observation pillar, the technology is simple; the fabrication and embedding method is simple; the pillar is easy to fabricate, and convenient to use, and is not damaged easily; an observation error can be reduced; the observation accuracy is reliable; and specified requirements of standards are met.

Description

technical field [0001] The invention relates to a forced centering observation pier for precision engineering measurement. In particular, it relates to a method for making a forced centering observation pier for precision engineering measurement and the observation pier. Background technique [0002] Various measurement marks in precision engineering measurement are control points for construction or installation measurement control network, reference points and observation points for deformation observation. For example, in the construction process of the precision engineering control network, the measurement accuracy of angle measurement and edge measurement can be guaranteed by using corresponding precision instruments and a reasonable control network layout. However, when observing, it is necessary to ensure that the center of the instrument and the control point are on the same vertical line. During the measurement process, the instrument is usually set up on a convent...

AI Technical Summary

Problems solved by technology

However, when observing, it is necessary to ensure that the center of the instrument and the control point are on the same vertical line. During the measurement process, the instrument is usually set up on a conventional tripod, and it is difficult to ensure that the instrument is centered by using an optical plummet or a vertical ball. The center is completely aligned with the center of the control point, so that the measurement accuracy cannot reach the specified accuracy

For this reason, at present, forced centering observation piers are widely used in precision engineering surveys, but in actual work, there is no detailed information on the production methods of the observation piers, which brings great inconvenience to precision engineering surveys

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