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Staged excavations and Component Supersequences.

The first stage of setting up a complex Supersequence is to process each Strip in the Supersequence creating a series of Staged Excavations, Subsequences and Component Supersequences.

 

 

 

The process of creating a complex Supersequence spanning many strips involves the following steps:

For each strip create Staged Excavation and Raw Sequence.

Once the the Stage Excavation for a strip is complete create the necessary Subsequences.

Create a Supersequence for each component of the current strip.

 

1.Create a Terrain Restore Surface for the starting state of the topography.

2.For the first strip, create a Staged excavation, Raw Sequence, and Subsequences.

3.Create a Component Supersequence for each Pass or subsection of the stripping operation for the strip.

4.Assemble the Component Supersequences into a complete Supersequence to excavate the strip.

5.Run the strip's Supersequence using Excavate/Start Supersequence to excavate the strip.

6.Repeat steps 2 to 5 for all strips.

7.Once all strips are processed in the above manner, implement be Restore .2 restore the original topography.

8.Create a Compound Supersequence for the desired schedule.

9.Test the Supersequence with Excavate/Start Supersequence, modify the Supersequence if required.

10.Once a  successful Supersequence has been run implement be Restore Point and save the 3d-DigPlus file.

 

Key Information - creating a Staged Excavation for an advanced strip.

You can create Staged Excavation for an advanced strip (strip beyond the current strip) without excavating the previous strip. However when the system creates the Raw Sequence all material within the Limiting Polygon will be excavated. The Excavation will appear to sump in and create a box cut type excavation for the strip. Although this is not the way the strip will be excavated, it will not create any error. However observing the creation of the Raw Sequence does provide valuable information and allows any errors in the set up to be detected and fixed. It is easier to visualise the raw sequence if it is excavated from the actual starting state for the strip (i.e. the previous strip has been excavated). Hence the procedure outlined above is recommended but not essential.

 

 

 

Many of the above procedures have been described in previous topics. One significant difference however is in the creation of Staged Excavations for multiple sequential strips. In the previous topics the process of staged excavation was described in the context of a single strip. In these examples this single strip was the next strip to be excavated and consequently faced an open void. When the process of defining a staged excavation is complete, a Raw Sequence is created. During the creation of the Raw Sequence each Step is excavated in turn and this excavation process is displayed in the Terrain Window. Observing the creation of the Raw Sequence is very important as it allows the user to identify any possible errors in the setup and sequence. It is particularly important in the case of multiple strip design that any basic errors at the time of strip set up are identified and fixed. After creation of the Raw Sequence, 3d-DigPlus restores the topography to its original state.

If a second strip is set up as a staged excavation when the Raw Sequence is created each Step in its Raw Sequence will be displayed in the Terrain Window as per the first strip. However in the case of a subsequent strip, the previous Strip's overburden will still be in place, consequently the excavation associated with the Raw Sequence will appear as a box, sumping in rather than extending existing high wall. The following video clip illustrates this:

 

Keep in mind that the process of creating Raw Sequences does not involve performing a permanent excavation, the system is simply displaying the Raw Sequence for inspection as it is created. Hence the need to restore the terrain on completion.

Note also that although the Raw Sequence creation for subsequent strips appears as a sump operation, with the previous strips topography intact, the Raw Sequence so created will still be valid. Creating Raw Sequences for sequential strips in this manner is quite valid and produces no errors. However, as discussed above is very important that as each strip is set up that the setup is checked and validated. This checking is significantly easier for a particular strip if it is done with the topography in the starting state that strip (i.e. the previous strip excavated out).

The following video clip demonstrates the preferred method for the setup of excavations for sequential strips: