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Sweep Along Curved & Sloped Path
Hello,
I am using AutoCad 2020.
I am trying to model a cast in place concrete ramp structure which is curved and has a 5% slop along the centerline. I was able to obtain the CAD file from the EOR to get the alignment and section of the structure. I took the 2D file and put vertical reference lines along the centerline to establish the correct elevation at each point. I then drew arcs and lines to establish the 3D alignment and converted to polylines to referencing when using the sweep function.
I placed the section outline at the beginning of the ramp structure and used the sweep command along the centerline that I created. When I do this, I end up with a rotation on the solid. This structure is intended to be "level" across and not super-elevated. I split the structure into three sections (first curve (W4 to W3), straight section (W3 to W2), second curve (W2 to W1)). This rotation seems to only be occurring at the first and second curves.
Once I have the CIP section modeled, I wanted to use this to determine "fills" required from the falsework (not modeled) that will be provided to support the formwork for the ramp structure. I was thinking maybe the best way to do this would be to create a planar surface to represent the top of falsework and dimension from this surface to the underside of the ramp structure. (Maybe there is a better way to do this).
The working portion of the model is all the way to the right of the model space in the attached file. You should be able to see the rotation at W3 when referencing the green section I drew that is level. Any help is greatly appreciated. I have worked with 2D, but am clearly inexperienced with 3D.