civil 3d stream design nevada creek,...

Civil 3D Stream Design Nevada Creek, MT

CIVIL 3D - STREAM DESIGN


Table of Contents

1 STREAM DESIGN EXAMPLE .................................................................................... 1

1.1 CREATE EXISTING SURFACE .................................................................... 1

1.1.1 Import Aerial Image ........................................................................... 1

1.1.2 Import Survey Point Data .................................................................. 1

1.1.3 Create Breaklines.............................................................................. 2

1.1.4 Create Existing Surface .................................................................... 3

1.1.5 Create Fill Surface ............................................................................ 3

1.2 REFERENCE REACH DATA AND DESIGN PARAMETERS ...................... 4

1.3 CREATE DESIGN ALIGNMENT ................................................................... 5

1.3.1 Draft in Circles for Range of Radius ................................................. 5

1.3.2 Alignment by Layout ......................................................................... 5

1.3.3 Editing Alignment .............................................................................. 8

1.4 PROFILE FOR EXISTING CONDITIONS ................................................... 10

2 BREAKLINE PROGRAM ......................................................................................... 11

2.1 Cover Sheet ................................................................................................ 11

2.2 Import Existing Ground Data .................................................................... 11

2.3 Process Alignment Data ............................................................................ 13

2.4 Setting Profile ............................................................................................. 15

2.5 Exporting Points ........................................................................................ 17

3 CREATING DESIGN SURFACE .............................................................................. 18

3.1 Creating Breakines .................................................................................... 20

3.2 Create Floodplain Breaklines ................................................................... 22

3.3 Create a Boundary for you Surface.......................................................... 22

3.4 Quick Volume Calculation ......................................................................... 23

3.5 Create a Volume Surface ........................................................................... 23

4 GRADING ................................................................................................................. 25

4.1 Create Feature Lines.................................................................................. 25

4.2 Create Grading Group ............................................................................... 26

4.3 Final Surface ............................................................................................... 27


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1 STREAM DESIGN EXAMPLE

Nevada Creek, Montana

1.1 CREATE EXISTING SURFACE

Start a new drawing using _NCSU_SRI.dwt Template File Drawing Settings -> USA, Montana NC83F

Save drawing to the following folder Stream Design\Nevada_Creek.dwg

1.1.1 Import Aerial Image

Use the Mapwspace Command (type MAPWSPACE in command line) turn task plane <on> Connect to data -> browse to raster image -> Nevada_Creek\Images\2123.sid

o Important – Change Projection on SID to MT83 Meter o Add to MAP

1.1.2 Import Survey Point Data

Go through survey points; add any missing DES KEYS (See Monitoring Example)


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Points -> Import/Export Browse for File Stream Design\Nevada_Creek\Existing_Topo_Survey.cvs

1.1.3 Create Breaklines

Create 3D Polylines for TOB, TW, TOE, TOS, TOB TERR In command line -> 3Dpoly -> ‘PN and select the point number range for each group or select by

node thought the stream Example TW -> Command Line -> 3dpoly -> ‘pn -> 837-968


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1.1.4 Create Existing Surface

Add Point Group and Breaklines to new Surface Call Existing_Surface

1.1.5 Create Fill Surface

Create New Point Group Exclude with raw descriptions matching -> TOE, TW, WS, BKF, XS* (anything inside the channel) Add new point group (fill_surface_points) and all breaklines except TOE, TW to Fill_Surface

We will use this surface later Now LOCK Both Surfaces


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1.2 REFERENCE REACH DATA AND DESIGN PARAMETERS

Open up Excel Sheet ->Stream_Design\Nevada_Creek\Design_Data\Design Table for Nevada Creek.xls Enter in Cross-Sectional Area of 35 sqft for Proposed Reach (cell G7) Evaluate Pattern Data such as Radius of Curvature, Belt Width, Stream Meander Length, ect.

Data is computed by Reference Reach data that was input, all based on Cross-Sectional Area to relate back to Bankfull Width (Cell G7)

Buttons on top zoom to desired data

sets

Use Value from Entry Number & Variable - Proposed Design Reach 72, 76, 78 for Alignment Layout

*Provided by Wildland Hydrology


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1.3 CREATE DESIGN ALIGNMENT

There are two ways to define Alignments, either by Polyline or by Layout. Note: If you define an alignment by Polyline you will not be able to edit and stay tangent; if you define by layout you are given the ability to update alignment dynamically and stay tangent. In this example we will define by Layout using design criteria sets to define Radius of Curvature and Riffle Lengths.

1.3.1 Draft in Circles for Range of Radius

To help visualize the layout, pick a few circles in the range allowed by design table This will be an aid in using the design alignment by layout in next steps I am going to propose a Priority II restoration and stay in the old channel and adjust pattern data to

match up with reference conditions – you may do as you wish

When placing your curves be sure to check your P-P Spacing, Stream Meander Length, and Belt Widths from the Design Table to make sure you stay within your reference data

1.3.2 Alignment by Layout

To layout your stream alignment, it is up to the designer to use their preferred method. You can draw in circles to help as a guide and snap lines to tangent, or you can use the tool Alignment by Layout

Construct the Alignment by Layout Alignments -> Create Alignment by Layout Name Alignment C-RIVR-Design Use _ncsu_C-RIVR-DSGN Style Use _ncsu_C-RIVR-DESN Label Set


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Select tab Design Criteria By selecting the Design Criteria Tab we are able to enter in

values for Min and Max of Radius of Curvature and Riffle Length.

Use Values from Design Table to input in C-RIVR-LEN~MAX~ = Riffle Max Length C-RIVR-LEN~MIN~ = Riffle Min Length C-RIVR-LEN~MAX~ = Radius Max Length C-RIVR-RADI~MIN~ = Radius Min Length

Change Values Here Select boxes that are outlined in RED


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In order to Define by Layout, we need to set a constant value to draw in the default Radius

Define Alignment by Tangent – Tangent (With curves)

Draw in Alignment choosing PI (Point of Intersection)

Start from Upstream and word down only choosing PI points It is important to understand that we don’t have to pick the exact PI Point, it can be “eyeballed”. We define

alignments by layout to make edits and adjust it after the fact.


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If you chose a PI that is too tight the Radius won’t be drawn in… Don’t worry we can fix this after we are done by doing the following

1.3.3 Editing Alignment

There are two ways to edit alignment; by defining the alignment by layout we are able to edit alignment graphically and by tables.

Graphically

Adjusts Location: Riffle Lengths

Adjusts Radius

Warning: Riffle Length Out of Design Range


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This is where the Design Criteria set comes in handy; if we fall outside our range we get a warning symbol. This has no effect on the alignment - it’s there to let you know you are outside the range and can adjust or not.

Go up and down the alignment and fix any errors so your design layout lies within the reference range

Editing Alignment by Table

Right Click on Alignment -> Edit Alignment Geometry

Select Alignment Grid

1.4


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1.4 PROFILE FOR EXISTING CONDITIONS

Once we have our design alignment set, next we must create a profile from surface for the existing conditions. This will show where the existing ground is in reference to our design alignment. This is also needed to run the breakline program in the next step.

Create a profile for the existing surface along the design reach alignment. Profile -> Profile from Surface Select the Design Alignment Add the Existing_Surface Draw in Profile View

Use 10TO1-VEXG Style and Create Profile View


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2 BREAKLINE PROGRAM

With your existing conditions surface (your design alignment that incorporates all of the design parameters and a profile for your existing ground surface) we can take our 2-D plan/profile view and turn it into a 3-D surface.

2.1 Cover Sheet

Open up Breakline_Civil3D_V4.xls from Design Folder *Enable Macros* Set Design Riffle and Pool Cross-Sections Enter in Data for Cross-Section on Cross Section Sheet from Design Table spreadsheet

Once you have entered in the data for the riffle

cross section click

Set Pool X-Section Data

2.2 Import Existing Ground Data

Go back to Civil 3D Find Profile and right click on Existing Ground Line -> Edit Profile Geometry Select Profile Grid View button


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Right Click in Panorama window and Copy All

Go back to Breakline program and select the Profile_Sort tab In Cell A1 -> Paste

Next Click

2.3


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2.3 Process Alignment Data

Go back to Civil3D In the Toolspace window, click on the Toolbox Tab Under Reports Manager -> Alignment -> select Station_and_Curve Report

Right Click in Report and Select All and then right click again and Copy

Go back to Breakline Program and Select the Align_Sort Tab In Cell A1 -> Paste


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Click on Analyze Button

When the Macro is Finished you should be able to see your profile on the Interface Page


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2.4 Setting Profile

Now that we have all our alignment and profile data from CAD and imported into the breakline program, we are now able to set our profile

Interface Page There are two different options to set your design profile located in the drop down menu (cell R1):

AUTO or BKF SLOPE.

AUTO BKF Option To use this option you must define a starting elevation and ending elevation (Cells V2 and V3) then

press the Re-Set BKF Line.

Using the Auto Bankfull Option, you are able to change slope from a riffle to riffle basis (Row 39). You are also allowed to use Structure Drops (Row 41) to hold grade for each pool to pool basis.


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BKF SLOPE Option This option is set to allow the user to enter in bankfull slope by stationing. Using this option you

are not allowed to change riffle slopes manually.


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Other Features Turning On/Off Chart Series;

A Dynamic Graph in excel allows the user to turn on/off series in the chart area, by selection on the check boxes you are allowed to set the series current state.

Reference Reach Data:

Entering in data here will give warnings if design is outside of range

Edit Design Cross Section Data: Can change values from here or on Cover Sheet tab

2.5 Exporting Points

When you are finished setting your profile we need to create a point file to import into Civil3D to create our design surface

Press the Macro

This will save the file to the location the Breakline Program is currently saved in Save the File as NV_Design1.txt

DISPLAY CROSS-SECTION

DESIGN DATA


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3 CREATING DESIGN SURFACE

Once we have a design profile set, we do not need to do anything else with the breakline program. Everything is handled within Civil3D.

Switch back to Civil3D First step is to import our breakline points by doing the following: Points ->Create Points – Alignments -> Import from File

Select the file you saved in the previous step NV_Design1.txt In the Command Line it will ask for the format of the file;

5. Station, Offset, Elevation, Description Enter 5 in command line

Next it in the command line it will ask you to Enter a Delimiter

Enter 2 in command line

Select the Default for the next two lines in the Command line Now Select your Design Alignment and wait for the points to be imported


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3.1 Creating Breakines

Now that we have our points we are ready to create our breaklines for our design surface First Step is to Create a Point Group for the Design Surface

o Select all Design Points

o IMPORTANT: Remember the Number Range

Next is to create a 3D Polyline using the Point Number Range o 3dpoly -> ‘pn -> 1080-6630 (or whatever your range is) o Depending on how long your alignment is this may take a few minutes

When the 3dpolyline is created we can delete the points in the Design_Points Group Next is to use the BREAK command and break the Left Floodplain Breakline and Right Floodplain

Breakline. We need to do this to create grading for our final design surface.


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Create a new Surface (Design_Surface) and add Breaklines (total of 3 breaklines)

Break Both Left and Right

Floodplain Breaklines


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3.2 Create Floodplain Breaklines

To get surface data outside out floodplain limits for grading and calculating volumes, we need to copy the last breakline and move it outside the limits of the floodplain.

Use the tool Stepped Offset under the Grading Menu Enter in the Distance you wish to offset and do a

difference of elevation of 0

o With the Stepped Offset command you can also change the elevation if you are doing a B type channel

o Note: Depending on how sinuous your channel

is you may have to do this several times and break the lines

Add new Offset Breaklines to Design Surface

3.3 Create a Boundary for your Surface

Based on your Floodplain Limits and grading limits, create a boundary that contains surface data for grading.

Add Boundary to Surface


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3.4 Quick Volume Calculation

Once you have completed the steps to this point, a quick volume calculation is recommended to see how much Cut or Fill your current layout has.

Surfaces -> Utilities -> Volumes

Select Create a New Volume Entry

Use Existing_Surface as Base and Design_Surface as

Comparison– View results to the right

Once you view your results we start the process of Optimizing our design to make sure we can

achieve the best cut/fill number for our site.

If you feel your number for your quick volume is too far off you can return back to your excel sheet and adjust your profile to either bring your surface up or down depending on your situation.

3.5 Create a Volume Surface

If you are happy with the range of your quick cut/fill number, the next step is to obtain the cut/fill numbers based on parcels or boundaries. To do this we need to create a Volume Surface

o Surface -> Create Surface

Name surface Volume_Surface Base Surface = Existing_Surface Comparison Surface = Design_Surface


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The next step is to create boundaries inside your floodplain limits. o Isolate floodplain boundary o Create lines across floodplain o In Command Line type bpoly and select inside floodplain lines you just drew

We can now create volumes based on the parcel/boundary area Surfaces -> Utilities -> Bounded Volumes

Enter -> Select Volume Surface Select Closed Polygon Areas just created This will give you cut/fill for that parcel


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4 GRADING

We want to perform grading as the last step in our design process. Up to this point we have optimized our design through a few iterations and now we are ready to apply a grading object to create a smooth design surface. Grading has proven to be difficult in Civil 3D - in my experience I have found Civil 3D to crash frequently during this process and this is why I choose to do this step last. It is also important to remember to Save every time when you choose a new command.

4.1 Create Feature Lines

The steps are the following: o Create a boundary o Create floodplain lines o Turn floodplain lines into Feature Lines

Grading -> Create Feature Lines from Objects Select Floodplain Lines


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Create a new site Grading Check the Assign Elevation box

Sample elevations from

Design_Surface

4.2 Create Grading Group

Grading -> Create Grading Set the Group

Name it Grading Check Automatic surface creation box Set the Target Surface to Fill_Surface Select the Style (_ncsu_C-SITE-SURF-SLOP) Create Grading

Select the feature line you wish to grade; with the style SURF-SLOP you are able to give it the Cut slope and Fill slope. I used 4:1

You can now do cut/fill again with the grading (it shouldn’t

change much for this example


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4.3 Final Surface

Create a new surface and paste Design_Surface, Grading Surface and Fill_Surface into it View Completed Surface

civil 3d stream design nevada creek,...

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