Posted By Sir Veyor 51 on 9/3/2008 at 5:28 AM
I see that you are all very busy with P&R these days, so forgive me for trying to divert your attention….
I´ve been following your discussions about machine control and modeling with great interest.
In my little corner of the world (northern Europe), machine control has been around for some time now.
a slow start with total station control on graders and pavers in the
early to mid-90´s, through a boost in the late 90´s when GPS became
more reliable, and the real explosion after 2000 when excavator control
became available, machine control is now the standard with traditional
stakeout as rare exceptions.
In the beginning we mostly had to
create our models from nothing more than paper plans. Design data has
improved since then, but not yet to a degree where you can just grab
the design from the cad drawings and upload it to the machines. And I
seriously doubt that it ever will, even though the current design tools
would allow it. I see two main reasons for this: Design cost and
liability. The owner, who normally pays for the design, just wants to
keep it as cheap as possible. The designer of course wants to collect
his money with the least possible effort, so he cheats. He creates a
model that is "about" right, then tweaks the plans until they look good
in 2D. This is much easier than creating a perfect 3D design. He then
keeps the model to himself, since the party who ordered the design did
not ask for it. If he still agrees to release it, he makes d@mn sure
you know it can´t be trusted and that he accepts no liability.
who should clean up the mess? My first choice as a contractor would be
my experienced construction surveyor. This is what he has been doing
all the time, he just has to use the same data in a slightly different
He knows exactly what he is doing (if he didn´t, I´d have fired
him long ago ;-)). He has complete access to all relevant information
about the project, and will be well equipped to do monitoring and
maintenance as needed.
My second choice would be the external
specialist. He would have to be extremely qualified, since his time on
the project will be limited. I am still accepting a higher risk,
because he can only work with what I give him, and when I tell him to.
surveyor without thorough construction experience, licensed or not,
would ever be an option. No disrespect intended to anyone, or to any
legislation that you might have. It´s just very different.
machine control emerged, some were concerned that it would make
construction surveyors redundant. At least so far, this has not
happened here. Qualified surveyors are higher in demand than ever
before. The profession has not disappeared, it has only changed. Of
course there are a lot of new things to learn, but that has always been
the case in this business.
What are your experiences and expectations? What impact has machine control made so far, and how fast is it expanding?
To read the rest of this thread go towww.i-boards.com/bnp/pob/messages.asp?MsgID=1261402&ThreadID=120405&IsResponse=False#1261402.
Machine Control and Modeling
September 3, 2008