400 meters track and field permanent pile how to protect?

Due to the requirements of the design drawings, it is necessary to carry out measurements and payoffs and draw line work for track and field projects. Therefore, the original control piles for the site must be retained for a long period of time. This is inseparable from the management of future sites. of. The structure of the control piles is shown in the figure. The foundation of the structure should be compacted, and the backfill tank should be compacted. The material of the pile should be copper, the diameter of the circle is 4cm, and the top of the pile should be marked with 2mm protrusions.


Permanent pile buried schematic

1—copper piles; 2—cement mortar; 3—masonry; 4—manure tank compaction;

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