Comparison of flat single-axis site leveling – earthwork balance plans

Background of the problem

The length of the horizontal tracker can exceed 100 meters, and even slight terrain undulations can cause excessive height differences in the north-south direction of the tracker; this can result in shadow obstruction and prevent the cleaning robot from moving.

For this reason, adjustments are generally needed to the racks to ensure that the height difference between adjacent racks in the north and south is within the Setting range (typically around 0.3 meters). However, the adjustable range of the rack Pile is generally only around 0.3 meters, which inevitably results in Pile lengths that do not meet the requirements. Therefore, it is generally necessary to level the site.

The earthwork volumes vary significantly among different site leveling schemes. For details, please refer to "Comparison of Different Site Leveling Schemes for Horizontal N-S Axis Racks". The site leveling scheme discussed in this article does not consider earthwork balance, which may result in:The transportation of a large amount of earthwork increases costsOr in cases where a large amount of earthwork needs to be outsourced.

The new version of Candela3D introduces an earthwork balancing feature, enabling full-site earthwork balancing or earthwork balancing between specified areas. Taking a specific actual project as an example, the following describes site leveling in three scenarios: without considering earthwork balancing, overall earthwork balancing, and earthwork balancing by blocks.

1. Comparison benchmark: Without considering earthwork balance

Figure 1-1: Profile along the axis direction of the array (Plot 1, without considering earthwork balance)

2. Global earthwork balance

Figure 2-1: Profile along the axis direction of the array (Plot 1, global earthwork balance)

3. Each plot should maintain its own earthwork balance

Figure 3-1: Profile along the axis direction of the array (Plot 1, with respective earthwork balance)

Conclusion

It can be seen that:

1) Whether it's global or individual balance, it can achieve a state where the earthwork is controlled close to balance (generally allowing some excavation);

2) The cost of earthwork balance is that both excavation volume and filling volume will increase;

3) Respective balancing plans can reduce earthwork transportation between plots, but the amount of excavation and filling volume will be higher than the overall balance.