Avoiding an existing service

00:03

some sites will include existing services such as water

00:07

supply systems or gas pipelines that must be avoided.

00:11

Your stormwater network must go above or below these existing services

00:17

if your pipe is to go above the existing service,

00:20

the minimum downstream invert technique that was used to

00:23

set a minimum outfall level can be used however,

00:26

it is probably simpler to type in the upstream and downstream invert of a pipe

00:31

to fix its level in slope and then the other pipes should be designed around it

00:36

to begin duplicate the basic design phase

00:40

and then create a phase called existing service.

00:44

Make sure any other phases are turned off so that their

00:47

visibility is off and so they are not running in the simulation

00:52

from the tree view.

00:53

Double click the connections node to open the connections table.

00:57

A column named lock should be included at the right end of this table

01:01

For pipe three. Make sure the lock is set to all

01:05

for all other pipes. The lock should be set to none.

01:09

Lower pipe three x 1 m by manually typing in the

01:12

up invert level and the down invert level for it.

01:16

For both values, type in a value that is one m less than the current value,

01:21

click okay,

01:23

next

01:24

rerun the network design wizard

01:26

on the ribbon.

01:27

Preliminary sizing tab network design panel, click network design wizard,

01:34

click next twice to forward to the design options page,

01:38

Enable the option,

01:39

allow backdrops and then set the minimum backdrop value

01:43

to 0.2 and the minimum backdrop value to 1.5.

01:48

No other values need to be changed,

01:51

click finish

01:53

now, open the profile view to check the design changes

01:57

in the tree view,

01:59

right click the flow path and select show profile

02:03

In the profile dialogue.

02:04

You can see how the design now drops pipe 3 to avoid the existing services.

Video transcript

00:03

some sites will include existing services such as water

00:07

supply systems or gas pipelines that must be avoided.

00:11

Your stormwater network must go above or below these existing services

00:17

if your pipe is to go above the existing service,

00:20

the minimum downstream invert technique that was used to

00:23

set a minimum outfall level can be used however,

00:26

it is probably simpler to type in the upstream and downstream invert of a pipe

00:31

to fix its level in slope and then the other pipes should be designed around it

00:36

to begin duplicate the basic design phase

00:40

and then create a phase called existing service.

00:44

Make sure any other phases are turned off so that their

00:47

visibility is off and so they are not running in the simulation

00:52

from the tree view.

00:53

Double click the connections node to open the connections table.

00:57

A column named lock should be included at the right end of this table

01:01

For pipe three. Make sure the lock is set to all

01:05

for all other pipes. The lock should be set to none.

01:09

Lower pipe three x 1 m by manually typing in the

01:12

up invert level and the down invert level for it.

01:16

For both values, type in a value that is one m less than the current value,

01:21

click okay,

01:23

next

01:24

rerun the network design wizard

01:26

on the ribbon.

01:27

Preliminary sizing tab network design panel, click network design wizard,

01:34

click next twice to forward to the design options page,

01:38

Enable the option,

01:39

allow backdrops and then set the minimum backdrop value

01:43

to 0.2 and the minimum backdrop value to 1.5.

01:48

No other values need to be changed,

01:51

click finish

01:53

now, open the profile view to check the design changes

01:57

in the tree view,

01:59

right click the flow path and select show profile

02:03

In the profile dialogue.

02:04

You can see how the design now drops pipe 3 to avoid the existing services.

Video quiz

Required for course completion

When designing to avoid existing services, if your pipe is to go above the existing service, which of the following techniques can be used.?

(Select one)
Select an answer

1/1 questions left unanswered

Step-by-step:

Some sites will include existing services, such as water supply systems or gas pipelines that must be avoided. Your stormwater network must go above or below these existing services.

If your pipe is to go above the existing service, the ‘minimum downstream invert’ technique that was used to set a minimum outfall level can be used. However, it is probably simpler to type in the upstream and downstream invert of a pipe, to fix its level and slope, and then the other pipes should be designed around it.

  • The Profile – Flow1 dialog box of InfoDrainage, showing the existing conditions where a pipe, Pipe (3), needs to be moved to avoid an existing service.
  1. In the Tree View, right-click the Basic Design phase and select Duplicate Phase.
  2. Right-click the duplicated phase and click Rename Phase.
  3. Name it, “Existing Service”.
  4. Ensure all other phases are turned OFF.
  5. From the Tree View, double-click the Connections node.
    The InfoDrainage interface, with the Connections dialog box open in front of the Plan View. The Tree View highlights the new phase and the selection of the Connections node.
  6. In the Connections dialog box, for Pipe (3), make sure the Lock is set to All.
  7. Lower Pipe (3) by 1 meter by manually typing in the Upstream Invert Level.
  8. Lower Pipe (3) by 1 meter by manually typing in the Downstream Invert Level.
    The Connections dialog box, highlighting the new values for Pipe (3) that lower it by 1 meter.
  9. On the ribbon, Preliminary Sizing tab, Network Design panel, click Network Design Wizard.
  10. Click Next twice to forward to the Design Options page.
  11. Enable the option Allow Backdrops.
  12. Set the Minimum Backdrop value to 0.2.
  13. Set the Maximum Backdrop value to 1.5.
  14. Click Finish.
    The InfoDrainage interface, with the Network Design Wizard open in the foreground. The Design Options page is showing, with the backdrop options having been configured, and the Finish button is called out.
  15. Close the Network Design Report.
  16. In the Tree View, right-click the Flow1 flow path and select Show Profile.

You can see how the design now drops Pipe (3) to avoid the existing services.

  • The InfoDrainage interface, with the Profile – Flow1 dialog box open again, this time showing the new flow path for Pipe (3) after it was lowered.
Was this information helpful?