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SubscribeIntersection Assembly Sets for Tunnels (part 1)
We’ve had some interesting questions about some interesting intersections in Civil 3D 2010 recently and have been testing some ambitious ideas with marked points and invisible generic links.
We’re pleasently surprised at how well all this works - it takes time to set up the assemblies etc , but once they are done, the intersection can be formed as quickly as a simple road intersection and the geometry is quite robust. The alignments can be dragged etc and the intersection/corridor updated like a standard Civil 3D intersection.
This example in this case is a tunnel. It’s an interesting example in general and also showcases the marked points / invisible generic links in the assembly sets.
(semi) Automatic Kerb Returns using standard components...
- These kerb returns are not perfect - they’re just a first pass to get some quick volumes but they do more or less grade themselves automatically.
- They can also update (in vertical design) automatically.
They use a combination of existing subassemblies that come with the standard installation of Civil 3D.
This is just a brief overview of the concept. I’ll be covering the topic in detail on my AU session on Roundabout Reconstruction (even though the title refers specifically to roundabouts, the session is really just using a roundabout as a good example of some geometry with some interesting challenges and constraints).
The session is an easy one to remember - it’s the last one on the last day 
!
The Future of Civil Design...
Have you ever noticed that the procedures in Civil Design software are based on the old fashioned manual method? The alignment / profile thing works great but with new IT hardware, surely there should be something original coming out.
A wise programmer once told me that the calculations side of a software package is a relatively minor part and most of the main work goes into sorting out the graphical interface…
A wise and well respected road designer recently pointed out the similarities between all the various packages and then showed me what he described as ‘the future of Civil Design’…
REFERENCE PLANES 002
...a practical example (part2) - the finishing steps...
We’ve got the planes positioned and the profiles extracted… all we have to now is
- create the design profile and
- build the finished corridor.
This is a follow on from previous posts:
“Widen at Grade.. the concept”
“ref planes 002 a practical example (part 1)”
REFERENCE PLANES 002
...a practical example (part1)
One of the most common reconstruction jobs being done for Road Authorities these days is adding bus turning lanes to existing intersections.
The goal is to minimise the work on the existing roads by grading the new string to preserve and extend the existing road crossfall where possible. The challenge is to control the drainage around the new kerb - its a perfect example of reference planes in action.
This is a follow on from a previous post on the topic “Widen at Grade.. the concept”
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