Establish the original terrain data, and if it is a contour line, discretize it to form discrete points. In order to improve the calculation accuracy, before calculation, in addition to properly densifying the elevation points of the general terrain, we should also focus on the ridges, ditches, ponds, independent mounds, etc., and generally refer to the terrain and measured elevation points to densify the elevation points of the ridges, ditches and ponds.

2, drawing earthwork boundary

According to the design requirements, draw a closed area and determine the scope of earthwork calculation.

3, drawing earthwork grid

The area of earthwork calculation is divided according to a certain grid size. The size of the grid should be determined according to the complexity of the terrain and the accuracy required by the design, and the side length is generally 20m×20m or 40m×40m (100m× 100m can also be used when the terrain is flat and mechanized).

When drawing a grid, the influence of the position of the grid base point on the aesthetics and statistics of the drawing should be considered when determining the position of the grid base point. If the base point is not properly defined, it may be an incomplete square at all boundaries.

4. Grid number (optional)

When multiple earthwork boundary ranges need to be calculated at the same time, the program can automatically number the selected earthwork boundary ranges in turn.

5. Grid processing

After the earthwork grid is generated, it must be processed. After processing, you will see a white dot in the middle of each grid. These data storage points record the information of each grid.

6, define the corner elevation

Defines the natural elevation and design elevation of grid nodes, that is, corners. There are six methods to define the elevation of corner points: ① calculation with contour lines; ② Calculation with discrete points; (3) From the reference point; ④ Interpolation calculation of internal and external points; ⑤ Group definition; ⑥ Point by point definition.

Select Natural Elevation as the definition object. You can optimize earthwork without defining the design elevation first, and then define the design elevation of each point according to the optimization result (if there is already a design elevation, you can directly set the definition object as the design elevation, and then skip earthwork optimization and directly calculate earthwork); Generally speaking, the elevation definition method is calculated with discrete points.

7, earthwork optimization (optional)

If the calculation is directly optimized, the program will follow the principle of "minimum earthwork volume in this area and basic balance of excavation and filling"

The best results are given by the principle of. If there are requirements for some optimization parameters, you can directly define and re-optimize the calculation, and the program will re-calculate according to the "basic balance of excavation and filling". If you are satisfied with the results, you can choose the design elevation, and the program will calculate the elevation of each corner according to the optimization results. At this point, there will be several yellow lines on the map, which are digging and filling balance lines. After three consecutive optimizations, the filling and excavation difference is finally adjusted to 0.0 1%.

8, earthwork calculation

According to the natural and design elevation values of each corner of the grid, the fill and excavation data in the grid are calculated.

9, earthwork statistics

According to the calculation results of earthwork volume, the program can find the statistics table of excavation volume, and the statistics results will list the excavation volume.

10, earthwork 3D

If you want to observe the stereoscopic effect of earthwork, the program will automatically generate the stereoscopic effect map of earthwork.

Calculation of earthwork volume for site leveling is a common problem in civil engineering. Using Hongye municipal road software to calculate earthwork balance can avoid heavy work such as calibrating a large number of elevation slopes and complex interpolation by other methods. This method has strong applicability, high accuracy and high efficiency in earthwork calculation. In the design of earthwork balance project, it is a good choice to calculate earthwork volume by using elevation points.

Extended data

Principle of construction survey

There are various buildings and structures on the construction site, which are widely distributed and often built in stages and batches. In order to ensure that the plane position and elevation of buildings and structures can meet the design accuracy requirements and be connected into a unified whole, construction survey, like topographic mapping, must also follow the basic principles of surveying and mapping.

The basic principles of surveying and mapping work are: "from the whole to the part" in the overall layout; The step of "control first, then break the step"; Accuracy "from high to low". That is, firstly, a unified plane control network and elevation control network are established at the construction site. Then, according to the control network, the detailed positions of buildings and structures are set out.

In addition, the calibration of construction survey is also very important. If there are errors in the investigation, it will directly cause economic losses. In the process of lofting, all kinds of lofting data and field lofting results should be checked according to the principle of "step by step inspection". ?