There will be no errors in the longitudinal and longitudinal directions of the curb. Therefore, only by locating the position of the column according to the curb, can it be ensured that there will be no errors in the direction of the protective net in the longitudinal direction (by the way). Therefore, in the longitudinal ( On the way), there will be no error in the laying direction of the curb, and there will be no error in the longitudinal orientation of the protective net, and there will be no deviation in the longitudinal and longitudinal directions.

1. First, determine the distance between the columns, and take highway bridges, safety exits, movable protective mesh ports, viaducts, and level crossings as the laser ranging standard. There are two types of column spacing: 2 m and 4 m. The 2 m spacing is the raised column, and the 4 m spacing is the ordinary column. However, in the actual engineering construction process, irregular spacing often occurs. The installation position of the board is uncertain, so try to avoid special-shaped spacing when determining the spacing of the columns.
2. Vertical positioning: first, draw a straight line with a red pencil on the curb according to the distance between the columns, then use a rope and a nail to place a line along the way, adjust the line shape continuously, and then use a red pencil to find the vertical line perpendicular to the parallel line on a line. Line, and then find the vertical line on the horizontal line that is perpendicular to the horizontal line, and place a line on the horizontal line in the direction of the horizontal line, so as to ensure that the horizontal line of the horizontal line is perpendicular to the horizontal line.
3. Control column height: Whether the decorative ceiling of the column is stable, the stability of the high-speed guardrail wall determines the absolute height of the column, which is the highest factor for the linear damage of the anti-collision column. In the initial construction process of the anti-collision column project, we assumed that the curb stone is undoubtedly at the absolute elevation. According to the construction drawings, the building elevation of the column wall is 1750 px higher than the curb stone. When the first column is entered, each column is Based on the absolute elevation, according to the construction drawings, one wall is 1750 px higher than the curb, and then each post is hit, when the pile hammer falls on a post, each post must be hit on a post, and then Hit the column to the column, then hit the column to the column, and then make the height of the column absolute elevation, according to the construction drawings, the height of the column is too high, and each column must be high
4. The instability of the general curb stone wall is reflected on the column wall, which eventually causes the overall instability of the high-speed guardrail. Due to the number of columns, it is very difficult to adjust, and the following method to control the absolute height of the column wall is applied. , first calculate the absolute elevation of the curb stone wall based on the absolute elevation of the road surface, and then calculate the building elevation of the column wall according to the fact that the column wall should be 1750px higher than the curb stone wall, and then accurately measure each column when entering the column.