Levelling staff capable of adjusting observation position and measurement technique thereof

Abstract

The invention discloses a levelling staff capable of adjusting the observation position, which comprises the body of the levelling staff (1) and an auxiliary holding rod, the auxiliary holding rod comprises an upper plate (10), a lower plate (18) and upright rods (15), the upright rods are connected between the upper plate and the lower plate and limit the upper plate and the lower plate, the upper plate is provided with a notch (11), and the lower end surface of the upper plate is provided with an upper contact (13); a lower contact (17) is arranged at the center of the upper end surface of the lower plate, and staff retainers (16) are also arranged around the lower contact on the upper end surface of the lower plate. The invention also discloses a technique using the levelling staff to carry out measurement, which includes steps such as checking the auxiliary holding rod, mounting the levelling staff on the auxiliary holding rod, placing the auxiliary holding rod, measuring, determining the additive constant of the holding rod and processing data. When the position of an observation point is higher than the sight line of a level, the height of the levelling staff can be reduced,and thereby the overall observation cost of a special operation situation is reduced.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a leveling staff with adjustable observation position and a measurement process thereof used in the settlement observation of buildings or structures. Background technique [0002] In existing construction occasions, when the leveling method is used to observe the settlement of buildings or structures, the leveling rod and the level are generally used in conjunction with the leveling rod, that is, the leveling rod is vertically erected on different observation points, and the leveling rod is used to read when the line of sight is horizontal. Take the marking value of the leveling staff, observe the leveling staffs at different observation points at the same station, and the difference between the readings of the leveling staffs at different observation points is the height difference between the two points; through the way of height difference transmission, the Known point el...

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Problems solved by technology

[0003] However, in special construction operations, such as the construction site floor is low, or the observation point is set at a high position, and the line of sight cannot reach the height of the observation point, the leveling staff cannot be read, and it is difficult to complete the normal leveling procedure.

[0004] There are two main ideas to solve the above problems: one is to raise the height of the level gauge, and the other is to lower the height of the level rod; however, in actual operation, there is no suitable implementation method for lowering the height of the level rod. like figure 1 As shown, the observation platform (4) and the observation pier (8) are set on the lower construction site of the floor, the level (6) is placed on the observation platform (4), and the observer (7) stands on the observation pier (8). ); however, the above method has the disadvantages of setting up the observation platform (4) and the observation pier (8) with high cost, prolonged operation time, and unsatisfactory observation accuracy, and the actual operation is very difficult, and it is not allowed to set up the observation platform in extreme operation occasions (4), observation pier (8); Therefore, it is necessary to explore a suitable implementation mode for reducing the height of the leveling rod

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