mikeevans
2005-06-22, 12:46 PM
I have been trialling Civils 3D 2005 for use within our office and have been very impressed so far however, I have found the generation of channel lines using the functions available very confusing.
I followed the tutorial Corridor_3a, which contained an example of road widening using the transition functions.
When I tried to undertake my own from scratch I got a little confused, in the tutorial where you pick the Target Ha and Va’s, the first channel selection uses the same VA as the centreline? But is directed via a gradient function. When I try to do this from scratch the channel does not allow the centreline target VA to be used. The tutorial did not go into how the VA’s were created for the channel line but shows two alignments in the model space. Do I have to calculate and draw a new VA for the channel line? If this was the case it would be very difficult to do where a road width varies throughout the alignment. Can anyone shed any light on what I am doing wrong or how I should be doing this.
Also when I have two road alignments joining at right angles to each other how do I model the junction? Would I have to work out the levels at each channel then create a horizontal element for the left and right channel with VA’s to join them both together? Or is there another way that this should or could be done?
How do you model a transition from Right hung to left hung gradients
I.e.
Chainage 0 to 60 start -1:40 end -1:40
ch 60 to 70 start –1:40 end 1:40 (Transition)
ch 70 + start 1:40 end 1:40.
Do I need to set up a series of different assemblies through the whole alignment where these gradient changes would need to be? I don’t seem to be able to do this unless I’m missing a trick somewhere.
Finally there does not seem to be a function to check vertical and horizontal sight stopping distance (visibility) is this included in 2006 or is there another bolt on application that I would require to perform these actions in?
I have been using string design for a couple of years now so this is a new way of thinking for me, but a much better way of doing it. I just want to have every base covered and be sure that I will do all that we require before I go ahead and get the software for use in the office.
Any help or suggestions or usefull web tutorials or links anyone can give me on this including new tools perhaps that are included in Civils 3D 2006 that would do this task would be very welcome.
Apologies for the essay.
Mike Evans
Snr Technician
Clarkebond Civils.
I followed the tutorial Corridor_3a, which contained an example of road widening using the transition functions.
When I tried to undertake my own from scratch I got a little confused, in the tutorial where you pick the Target Ha and Va’s, the first channel selection uses the same VA as the centreline? But is directed via a gradient function. When I try to do this from scratch the channel does not allow the centreline target VA to be used. The tutorial did not go into how the VA’s were created for the channel line but shows two alignments in the model space. Do I have to calculate and draw a new VA for the channel line? If this was the case it would be very difficult to do where a road width varies throughout the alignment. Can anyone shed any light on what I am doing wrong or how I should be doing this.
Also when I have two road alignments joining at right angles to each other how do I model the junction? Would I have to work out the levels at each channel then create a horizontal element for the left and right channel with VA’s to join them both together? Or is there another way that this should or could be done?
How do you model a transition from Right hung to left hung gradients
I.e.
Chainage 0 to 60 start -1:40 end -1:40
ch 60 to 70 start –1:40 end 1:40 (Transition)
ch 70 + start 1:40 end 1:40.
Do I need to set up a series of different assemblies through the whole alignment where these gradient changes would need to be? I don’t seem to be able to do this unless I’m missing a trick somewhere.
Finally there does not seem to be a function to check vertical and horizontal sight stopping distance (visibility) is this included in 2006 or is there another bolt on application that I would require to perform these actions in?
I have been using string design for a couple of years now so this is a new way of thinking for me, but a much better way of doing it. I just want to have every base covered and be sure that I will do all that we require before I go ahead and get the software for use in the office.
Any help or suggestions or usefull web tutorials or links anyone can give me on this including new tools perhaps that are included in Civils 3D 2006 that would do this task would be very welcome.
Apologies for the essay.
Mike Evans
Snr Technician
Clarkebond Civils.