Join Jeff Bartels for an in-depth discussion in this video Introducing pressure networks, part of Civil 3D Essential Training.
- If your design includes the installation of water main, you'll need to create a pressure network. Pressure networks are used to model pressurised utilities. Typically, this would be water main, but these tools can also be used to model sanitary force main, gas lines, or fibre optic utilities. In this session, we will take our first look at a pressure network. On my screen is a drawing that represents a small, proposed subdivision. I'd like to start by taking a quick tour. Let's zoom in. Right here, I have an existing road, called Center Street.
If we pan up, we can see the proposed road, through the subdivision, this is called Kingsley Drive. I have designed the center line alignment for that road. Let me pan the drawing over. Over here, you can see I've created a surface profile for Kingsley Drive. I have also created a finished grade center line profile. Let's pan this back. I'm going to hover over the curving gutter. When I do, you can see that Kingsley Drive is actually a corridor. I have created a style that hides all of the assembly insertions.
So, Kingsley Drive is actually a 3D model. Let's pan this over. There are also two surfaces in this drawing. Let's take a look at those. I'm going to do that by coming over to the prospector tab. I'll expand the surfaces category. We'll take a look at the existing ground surface first. This is called EG. I'm going to right click on it, and I'll come up and choose surface properties. And then, in the dialogue box, I'm going to change its style to contours one and five background. And I'll click okay. If I back up, you can see the extents of the existing ground surface.
Now, let's look at the proposed surface. This is called Kingsley Drive Top. This surface was created from the corridor, and it represents the proposed surface, from right of way to right of way, throughout the subdivision. To show that surface, I'm going to right click on it. I'll come up with surface properties. And then I'll change its style to contours one and five design. I will then come down and click okay, and if I pan this around, you can see the extent of the proposed surface. Now that we know where the surfaces are, I'm going to hide them again.
I'll do that by selecting the existing surface, and the proposed one. I'll come over to the properties panel, and I'll change their style to no display. I'll press escape when finished. Let's pan the drawing up. Along the south side of Center Street, I've got an existing, 10 inch water main installation. Let me zoom in a little bit closer. Right here, you can see where I've made a connection to that water main. This is my pressure network. We can see the T-connection. Here's a valve. This pipe represents eight inch water main.
If I pan up, we can see an elbow. As I enter the subdivision, there's another fitting. We can draw a pressure network as fast as we can create two-dimensional geometry. The nice thing is, we are actually building a 3D model. Let's take a look. I am going to select several of these items, here at the connection, and then I'll come up and click the object viewer. I will then select the south east isometric hot spot, here on the view cube, and let's zoom in on that connection. Currently, I'm using the conceptual visual style.
Right here, you can see the valve. You can see the T, there's the existing water main, and the proposed. Let's close this. I'll press escape to deselect. Since a pressure network represents a 3D model, it's very easy to display in profile. Let's do that. I'll select one of the valves. I'll select a pipe, and a T. Let me pan this up, and I'll select one of the elbows. I will then right click, and choose select similar. This selects all of the pressure network components. I will then pan the drawing over, and from the ribbon, I'll choose draw parts in profile, and then I'll select the grid.
If I zoom in, we can see the pressure pipe. We can see the location of the fittings. If I pan the drawing over, you can see where I've designed a lowering, such that we can bypass an existing gas main. Let's take a look at that in plan view. Going to pan the drawing back over. Let me press escape to deselect the pressure network, and I'll zoom in. Right here is that gas main. If we look closely, you can see the fittings that were used to create the lowering. Let's take a look at those in 3D. I'll select all this content using a window. I'll select the gas main.
And then I'll come back up and click object viewer. Let's go back to that south east isometric hot spot. I'll zoom in, and then we'll orbit this around. At first glance, this looks like it might be complicated. We'll actually be doing this lowering together, in just a little bit. When I'm finished reviewing the geometry, I'm going to close the object viewer. I'll deselect my pressure network, and we'll back up and center this subdivision onscreen. Over the next few lessons, we'll recreate this proposed water main design, and in doing so we'll run through many of the features associated with pressure network.
Now, even though pressure networks represent a different type of utility, you'll find the workflows are very similar to what we learned working with gravity based pipe networks. In our next lesson, we'll start things off by creating a pressure network parts list
- Exploring the design data in drawings
- Creating, connecting, and grouping points
- Customizing label styles
- Defining existing ground surfaces
- Designing horizontal alignments
- Controlling alignment properties
- Creating profiles and profile views
- Sharing design data
- Creating and managing parcels
- Building assemblies
- Modeling advanced roadways
- Defining gravity-based pipe and pressure pipe networks
- Creating sections and section views
- Analyzing designs
- Generating plan sheets
Skill Level Intermediate
AutoCAD 2015 Essential Trainingwith Scott Onstott8h 35m Beginner
AutoCAD Tips, Tricks, & Industry Secretswith Jeff Bartels3h 48m Intermediate
1. Laying the Foundation
2. Creating and Managing Points
3. Defining Existing Ground Surfaces
4. Designing Horizontal Alignments
5. Creating Profiles and Profile Views
6. Sharing Design Data between Drawings
7. Creating and Managing Parcels
8. Creating Basic Roadway Models
9. Exploring Advanced Roadway Modeling Concepts
10. Modeling Gravity-Based Pipe Networks
11. Modeling Pressure Pipe Networks
12. Managing Sample Lines
13. Creating Sections and Section Views
14. Exploring Grading Tools
15. Analyzing Designs
Using the Inquiry Tool6m 7s
16. Generating Plan Sheets
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