You can accomodate complex volume situations by defining subcriteria.
Subcriteria is a new type of material definition in AutoCAD Civil 3D 2013. Using subcriteria, a material volume is reported by combining all the areas of submaterials in it.
A few cases where subcriteria can be applied are described in the following sections.
The following illustration shows a condition of overlapping materials that can be addressed by subcriteria.
(1) is top of Existing Ground, (2) is top of Subsoil, and (3) is top of Rockbed.
To define materials for this situation, you can use the following subcriteria:
- Subcriteria 1
- Surface name: EG; Condition: Below
- Surface name: Subsoil; Condition: Above
- Subcriteria 2
- Surface name: EG; Condition: Below
- Surface name: Rockbed; Condition: Above
To calculate volumes for this situation, AutoCAD Civil 3D adds vertical links (numbers 1-4) to create closed envelopes as shown in the following illustration.
Then the subcriteria are applied as follows, where (1) is subcriteria 1 (below EG, above subsoil), and (2) is subcriteria 2 (below EG, above Rockbed).
The same subcriteria can be applied to the case of non-overlapping materials, as shown in the following illustration.
Then the subcriteria are applied as follows, where (1) is subcriteria 1 (below EG, above subsoil), and (2) is subcriteria 2 (below EG, above Rockbed).
The case of intersecting materials is shown in the following illustration.
In this case, because Subsoil and Rockbed surfaces intersect, this situation could be addressed with a subcriteria that uses 3 surfaces: Below EG, Above Subsoil, and Above Rockbed.
Materials In Overhang Situations
The case of rock cut material in an overhang situation is shown in the following illustration, where (1) is Datum, (2) is Rock Bed, (3) is Rock Under, and (4) is Rock Top.
To accommodate this situation, you would define the following subcriteria:
- Subcriteria 1
- Surface name: Datum; Condition: Above
- Surface name: Rock Bed; Condition: Below
- Subcriteria 2
- Surface name: Rock Under; Condition: Above
- Surface name: Rock Top; Condition: Below
- Subcriteria 3
- Surface name: Datum; Condition: Above
- Surface name: Rock Top; Condition: Below
To calculate volumes for this situation, AutoCAD Civil 3D adds vertical links (numbers 1-2) to create closed envelopes as shown in the following illustration.
Then the subcriteria are applied as follows, where (1) is subcriteria 1 (above Datum, below Rock Bed), (2) is subcriteria 2 (above Rock Under, below Rock Top), and (3) is subcriteria 3 (above Datum, below Rock Top).
The volumes for the three subcriteria are then combined to obtain the sum of Rock Cut material for each station.
Subcriteria can be defined in three different dialog boxes:
- Quantity Takeoff Criteria dialog box, Material List tab. For more information, see Creating Quantity Takeoff Criteria.
- Edit Material List dialog box. This dialog box is displayed when you run the Compute Materials command and the selected sample line group already has a material list associated with it.
- Sample Line Group Properties dialog box, Material List tab. This procedure is documented below.
To add a material with subcriteria to the material list of a sample line group
- Select a sample line. Click Sample Line tab
Modify panelGroup Properties
.At the Command prompt, enter EditSampleLineGroupProperties. - Click Add New Material.
- Define the Quantity Type for the material as either Cut, Fill, or Cut And Refill.
- Select the new material and click Add A Subcriteria.
- Select the Subcriteria and use the controls under Define Material to add surfaces to it.
- Select the new material again and click Add A Subcriteria to define the next subcriteria for it.