I'm aware that some people are bothered by the difficulty experienced in modeling pressure pipe in a pipe network. There are some out there using the corridor method by altering the pipe trench assembly.
I'd like to offer another workflow that is closely related to the corridor method.
1. Layout your pressure pipe as an alignment.
- Create an alignment style that looks like your water line.
- Create alignment line labels for labeling your water.
- Create blocks representing each structure and configure them to point styles.
- Create description keys for your structure types i.e. BEND, TEE, REDUCER, VALVE, etc.
- Plan to use parameters in your description to label size i.e. TEE 8"x8" and manipulate the parameters in the full description for labeling purposes i.e. $1 TEE.
- Certain point labels for the water structures will contain leaders and some will not. Those that do not contain leaders will be typically grouped under a leadered label.
- Create a point group that will collect points with these descriptions.
3. Create a surface profile and profile view using your water alignment and the design surface.
- Create a profile style that displays the properties of your water line in profile.
- Sketch the top of pipe along the surface using profile layout tools.
- Move the profile to the frost line using Raise/Lower PVI's.
- Insert any pipe networks and existing utility locations that would affect the vertical design of the water line.
- Insert PVI's as necessary to create vertical bends or deflections.
- Use circular vertical curves with an appropriate value for radius if smoother pipes are desired.
- Copy the top of pipe and move the resulting profile down the necessary amount to represent bottom of pipe.
There are a few reasons why I prefer this method:
- Profile labels can be configured to call out station/elevation at regular intervals along the water line alignment even when the water line profile is superimposed onto a roadway centerline profile.
- Curves to the water line can be applied and tolerated vertically.
- Water structure points can be projected into the profile with station/elevation (projection) labels.
- Assign elevations by creating a surface using the bottom of pipe. I find this to be a very simple task by creating a corridor surface. An assembly that contains one flat link projecting out a small distance will do the trick. A code set that displays nothing can be assigned to the corridor.
- When projecting the points, assign elevations from the corridor surface and use point styles that display the structure appropriately for profile.
A few drawbacks:
- Projection labels are only able to see raw descriptions. Edit Label Text will have to be used to revise.
- If the projected point has been rotated in plan, the point will be rotated the same amount in profile; the symbol is rotated before Civil 3D applies any X-Y scaling from the point style. Keep insertion basepoint in center and manually adjust vertical locations after projecting. This will not change the actual point elevation.
- If you desire to use the stretchy bow tie valve, project a point marker into profile and insert a dynamic block over the marker that stretches at the pertinent points.
- If the bottom water line profile changes, the resulting corridor surface updates, but the projection labels containing elevations will not update. The points need to be deleted out of the profile and projected back in.