Method for controlling drawing of excavation outline in three-centered arch and fork construction of sinking and driving engineering

Abstract

The invention discloses a method for controlling the drawing of an excavation outline in three-centered arch and fork construction of sinking and driving engineering. The method comprises the steps of setting an arch top control line and a beveled-edge wall control line, calibrating a springing point, drawing a springing line, calibrating an arch top locating point, drawing a line by using a line rope and the like. According to the method disclosed by the invention, data used by line drawing can be reduced to a large extent, the number of the data can be reduced from the original more than 400 to just about 10, the line drawing can be very simple and quick, the working amount is reduced by tens of times, not only is the labor intensity of a worker reduced, but also the line drawing work efficiency is increased; and the excavation outline, which is drawn by the method, of a three-centered arch roadway is accurate in location, the outline is a continuous smooth curve, the design error is small, the line drawing accuracy is effectively increased, thus the excavation forming quality of an arch part and a fork of the three-centered roadway can be ensured, and the phenomena of over-excavation and under-excavation can be prevented from happening.

Description

technical field [0001] The invention belongs to the technical field of roadway construction, in particular to a line drawing method for controlling excavation contour lines in the construction of a three-center circular arch fork in a roadway project. Background technique [0002] At present, the excavation contour line must be drawn in advance before the excavation (driving) of the three-centered fork in the shaft and roadway project. During the construction of all roadways, the contour lines of the roadway are positioned with the measured centerline and waistline of the roadway as the baseline. The traditional method to draw the contour line of the three-center circular arch fork is to give a section drawing or make a data table according to the measurement of the centerline and waistline per linear meter, so as to control the arch height and width of the gradual section, plus the plan and longitudinal section. , more than 420 data are required. If the current working fac...

AI Technical Summary

Problems solved by technology

[0003] 1) Due to too much data, the workload of drawing the outline of the three-center circular arch roadway on the construction site is heavy, time-consuming and laborious, and the labor intensity of the staff is extremely high, and the efficiency is low

[0004] 2) The arch portion of the traditional drawing method can only be positioned by drawing points. Since the points are connected by line segments, the drawn line is not a continuous line segment. The roadway outline drawn on site has a large error with the design. The quality of the excavation at the fork and fork is poor, and it is easy to cause over- and under-excavation phenomena

Images