Chapter 09 – AutoCAD Civil 3D 2013 Essentials – The Essentials and Beyond

hello my name is Eric Chappell author of
autocad civil3d 2013 essentials and this
is the additional exercise for chapter 9
in this exercise we're going to apply
some of the things that you learned
about building corridors to the Madison
Lane alignment the first task we need to
complete is to develop an alternate
version of the assembly one that
excludes the curbing gutter and replaces
it with a grass strip so what we want is
two 12-foot or four meter lanes if
you're working in the metric data set
and a three-foot grass strip sloped
downward at 2% and we're going to use
the same daylighting that we were using
before to to handle the tie to the
existing ground surface so the way that
I'm gonna accomplish that is to begin by
copying the assembly that I already have
so I'm going to copy notice I only
selected the assembly baseline
everything else will come with it and
I'm going to copy that right down to a
spot below the original assembly now the
part that we want to omit is the curb
and gutter so I'm just going to go ahead
and delete that and using just basic
AutoCAD commands I'm going to select the
curb or press the Delete key and just
like that it's gone
I'll do the same thing on the right side
okay so that takes care of that part
what we need to do now is add a grass
strip just off the left and the right
edges of the pavement and that grass
strip needs to be three feet wide and it
needs to slope down at 2% to begin
accomplishing that I first need to bring
up my tool palette so I'll go to the
Home tab open my tool palettes window
and here are my sub assemblies I'm going
to turn off docking so that I can tuck
this up in the corner here and I'm going
to go to the generic sub assemblies
and I'm going to use a generic
sub-assembly called linked with and
slope this is a great all-purpose
sub-assembly
does exactly what it sounds like it's
when I want to put a link in place
that's generic and purpose and has a
width and a slope that I want to define
so I'm going to click on that and that
will bring up my properties window let
me just slide this over where you can
see it and I'll turn off docking for
that as well and before I insert it I
want to actually set the parameters so
we'll do the left side first since
that's actually where I'm zoomed in and
I want the width to be 3 feet slope I
want to be -2 and I want to use the
insert option so look down here on the
command line this is actually a new
feature in 2013 I want to insert a
sub-assembly right after the lane and
we'll actually kind of wedge it in
between two sub assemblies so I'll click
the insert option select the sub
assembly to insert after and you can see
how it pops it right in there now after
the after the lane sub assembly now that
before and after the way you figure that
out is you work from the center line or
from the base line here out so this is
first this is second this is third so
this is after this one and this one is
after this one so that's where the
before-and-after comes from so now to do
the other side I'm just going to change
the side to right let me pan over this
way a little bit
I hit enter
now I can pick the assembly and it'll
put it in afterwards all right so now
we've got the lane the grass strip and
the daylighting the curb is gone and
that meets the requirements of the of
the first task which is to create a new
sub assembly or a new assembly consists
of two 12-foot lanes and a three-foot
grass strip sloped downward at 2%
using the same day lighting that was
used before so now I've got my original
assembly with the curbs and my new
assembly which has instead of the curves
the grass strip and that takes care of
the first task so now that we've got the
alternate assembly in place for Madison
Lane let's go ahead and build a corridor
for Madison Lane and then we'll move on
to the next task which is to deal with
this bus turnout right here so I'll go
to the Home tab and launch the corridor
come in I'll call this corridor Madison
Lane and my alignment will be Madison
Lane my profile will be Madison Lane F G
CL and my assembly I didn't give it a
name it's currently called subdivision
road 2 but it probably wouldn't be a bad
idea to give that a real name like
subdivision road without curbs or
something like that target surface will
be eg for existing ground and I'm just
going to uncheck the box to set baseline
and region parameters and we'll go ahead
and just click OK and let the corridor
build as it is alright so our next task
in this exercise is to include a turnout
for this little bus pull off right here
so we want to use the red polyline near
station 3 + 0 0 that's this guy right
here and we're going to use that to
create the pull off area so since we've
been given a polyline to work with this
is a great opportunity to to do a target
transition so I'm going to click on the
corridor and hit my edit targets button
ask me to select the region which I only
have one in this corridor but I still
need to pick it and my width or offset
target now let's look at the stationing
so we can figure out left and right the
stationing increases towards the west so
that means this bus pull off that I'm
creating is on the right lane so I want
to take a look at the right length
transition which is right here I'll
click that I'm going to add
polyline' as my target so I'll select
from drawing select the red polyline and
hit enter that should be all I need I'm
gonna click OK okay again it's going to
push the corridor out along that
transition and create the bus pull off
which is what my task is for for the
second task so that completes the second
task and for the next one we're gonna
look at creating a corridor surface for
madison lane to create the corridor
surface I'll begin by escaping out of
command that I'm currently in then I'll
select the corridor and simply hit
corridor surfaces on the ribbon I'll add
a surface and i'm going to call it
madison lane FG right now the surface
style is set to contours one in five
design i think that's good and the data
i want to add are the top links which is
what it's already set to I can choose
feature lines or links I want to use
links and I want to use the top ones so
hit the plus sign
it adds the top links to the surface now
normally I would go over to boundaries
and get that taken care of but just to
show you what's going to happen I'll
click OK
wants me to rebuild the corridor that's
fine and there you can see the surface
that it has created it looks pretty good
but we've got some extra contours out
here on the outer edges that that don't
belong so we want to clean that up a
little bit so we'll go back into
corridor surfaces and on the boundaries
tab I'm going to right click and say use
corridor extents as outer boundary and
just like that it's going to clean up
the edges and we're not going to have
those contours out in space that don't
belong and you can see the corridor
count contours are tying together nicely
with the existing contours and that's
all there is to creating a surface out
of the corridor and that takes care of
the third task
for the fourth task we want to create an
intersection between Logan Court and
Madison lanes so this is going to be
your first actual look at the
intersection tool if you haven't done so
on your own now the first thing I want
to do is pull back the Madison Lane
corridor as it is right now to kind of
make room for the intersection so I'm
going to pull it back to about here and
that's more space than I need but that's
okay
you saw how easy that was to do to
simply change the end of that region and
move the end of the corridor back and
forth wherever you really want to now
I'm just going to launch the
intersection wizard and kind of let it
do its thing so on the Home tab I'm
going to click intersections and then
create intersection my intersection
point is between the two alignments and
anything that comes up that I can accept
as default I'm going to so there's my
default styles I'll click Next
there notice it's chosen the finished
ground centerline profiles for each
alignment we've got parameters that
control the offsets notice the 12-foot
lanes
we've got parameters that control the
curb returns notice the 25-foot Filat
radii alright I'm not going to go
through each one of these commands in
detail because there's a lot here and
we've also got parameters that control
the transitions between the two profiles
next we've got our what's called a an
assembly set it's actually going to
create a large number of different
regions and it's going to apply several
different assemblies you can see the
assemblies listed here and the end
result the intersection is going to be a
pretty complicated thing it's going to
be multiple regions multiple different
assemblies pieced together and tied
together but the good news is it does
all that for us it's an automated
command that builds that complex
arrangement for us so I'll create the
intersection
it's going to think and work for a
little while and when it's done I should
have a fully developed corridor where
that intersection is so there you can
see the intersection it has created now
that that's taken place I can actually
grab this and pull it right up against
the other part of the corridor kind of
close that gap a little bit I can take
this and drag it to the end and we could
simply just continue building this
corridor out I can even pull this one
down at some point I could create
another intersection here and pull
everything together and then build
surfaces and and continue building and
combining until the corridor model is
complete so that is how you use the
intersection wizard in civil 3d and that
is our final task so that completes our
additional exercise for chapter 9