How to adjust the column height evenly when installing highway guardrails?

When installing the corrugated guardrail, whether the height of the column and the ground are the same, not only affects the appearance, but also affects the overall level of the guardrail. How do we ensure that the height of the guardrail post is uniform?

Before installing the guardrail, we need to understand the design elevation of the sidewalk, calculate the design elevation of the top surface of the curb according to the design elevation of the sidewalk, and then the height of the column should be higher than the height of the road elevation. The height of the curb will pile up. Although this method seems reasonable on the surface, there is a big error between the design elevation of the road surface and the actual elevation. What should I do if the pillars are not on the same horizontal line when installing according to the elevation calculation method?

The new research and development design method of wave guardrail: adopt the method of level measurement, first measure, and then calculate the penetration depth of each column according to the actual situation. After carefully measuring each location, the level is very accurate. Then piling is to control the depth of travel, which can effectively keep the column at the same height. After the columns are on the same horizontal line, the installation of the corrugated guardrail is very simple, otherwise the screws will not be aligned and cannot be installed.