topic Re: Alignment Creation from Horizontal and Vertical Control Data in Civil 3D Forum

Alignment Creation from Horizontal and Vertical Control Data

Anonymous — Fri, 21 Apr 2017 14:25:53 GMT

Hello,

I am trying to create an alignment from the data in a horizontal and vertical control sheet. I am having a major brain fart, as it has been 2 years since I did this last, I have attached the sheet with the data. If someone could give me a quick walkthrough about the easiest way to complete this, or link a video that shows completing an alignment using data it would be appreciated.

Re: Alignment Creation from Horizontal and Vertical Control Data

wfberry — Fri, 21 Apr 2017 17:40:54 GMT

I will get you started. I think from your questions that you will have trouble with the spirals.

SO:

You have 4 tangents.

BC to PI

PI to PI

PI to EC

You have NE coordinates for each of these. Connect them and label to check bearings. The bearings are given on the sheet.

Good Luck

Bill

Re: Alignment Creation from Horizontal and Vertical Control Data

Anonymous — Fri, 21 Apr 2017 17:57:42 GMT

Thanks Bill. I was including the CS and SC points in the alignment creation, that was my problem. Appreciate the help

Re: Alignment Creation from Horizontal and Vertical Control Data

wfberry — Fri, 21 Apr 2017 18:24:25 GMT

Glad I could help.

Bill

Re: Alignment Creation from Horizontal and Vertical Control Data

Anonymous — Tue, 24 Oct 2017 13:05:14 GMT

Hi Bill,

How are you? I am creating an alignment from the attached data. The alignment contains spirals, I haven't created alignments with spirals in a couple years. I'm having trouble remembering how to do so. My HOT is my beginning point, so am I going :

HOT to PI

PI to PI

Is it

HOT to TS

TS to ST

ST to TS

TS to ST

Or is there a different format for data I should be using? I understand the components of the spirals, I just cant remember what data points I should be drawing the tangents between.

Regards,

Darryl

Re: Alignment Creation from Horizontal and Vertical Control Data

wfberry — Tue, 24 Oct 2017 13:54:44 GMT

I do this once every 2-3 years so here goes:

Lay out your main PI to PI's

I cannot determine your HOT, I am assuming the same as my POT, (Point on Tangent) (HOT to PI to PI ,etc.)

You have plenty of info it appears with NE for your PI points and the various radii.

Start the alignment with the above geometry and the program should walk you through it.

Bill