Method for laying off plane control points by using wire suspension method

Abstract

The invention discloses a method for laying off plane control points by using a wire suspension method, which comprises the following steps of: erecting a total station at a known first control point KZ5, and switching a measuring mode to a laying-off mode; inputting the coordinate of the point as the coordinate of a station point, taking a second control point KZ4 as a back-sight point, and inputting the azimuth angle of the back-sight point; calculating the coordinates of control points ZX1 and ZX2 on an axis, and determining a design direction and a design distance; erecting a small prism at a laying-off control point along the design direction; hammering a timber pile and nailing an iron nail at the point; hammering four timber piles around the timber pile, and enabling bracing wires of the four timber piles to be crossed; making a base of the laying-off control point; carrying out wire suspension on the intersection of two bracing wires, and marking the center of a metal buried component; and erecting an instrument, accurately laying off the point location of the laying-off control point, and projecting the point location to the metal buried component so as to make a control point. The method disclosed by the invention is simple and convenient to use, and can be implemented just through erecting an instrument twice, thereby greatly reducing the workload, saving the manpower, improving the efficiency of the laying-off operation, and ensuring the requirements on laying-off accuracy.

Description

technical field [0001] The invention relates to a method for testing plane control points. In particular, it relates to a method for measuring and setting plane control points by using the hanging wire method. Background technique [0002] In the layout of engineering control network, especially for large-scale industrial buildings, control points are often arranged in the direction of the main axis of the building. This requires calculating the coordinates of the control points and accurately measuring the position of the control points. According to the traditional survey and design method, first set up the instrument to measure the position of the control point, dig a pit, pour concrete and place the metal embedded parts of the control point at this position; It is also necessary to set up the instrument measurement again to ensure that the control points can be projected on the range of the metal embedded parts; finally, wait for the metal embedded parts to be stable b...

AI Technical Summary

Problems solved by technology

According to this method, it is necessary to set up the instrument three times before and after, and the process of measuring and setting is time-consuming and laborious.

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