
It’s a fact that APS require significantly
less excavation work to provide parking for the same number of cars as multi-story
parking garages. It’s also a fact that the cost of excavation work is
non-linear, particularly when it comes to depth. Generally, each additional
foot of excavation depth cost more than the previous foot…sometimes much more.
As excavations for parking facilities go
deeper & deeper, numerous things can or do happen to make excavation costs
increase. Here are some the challenges and issues with increasing excavation
depth:
Earth
Shoring: Deep excavations require shoring systems
to hold back earth and water and stabilize nearby structures while digging. As
excavations deepen, more expensive earth shoring systems are needed to hold
back increasing pressure exerted by earth and water. Earth shoring systems for
deep excavations commonly consist of retention systems that act as walls to
keep earth in place and support systems that support and brace retention
systems.
Elevation: As excavations deepen, removed earth must be lifted ever higher. This
means the cost of getting out of the whole increases.
Water:
One of the biggest complications of any excavation
is encountering unexpected ground water. Each foot of excavation depth
increases the potential of encountering ground water and incurring the costs of
handling it.
The
APS Excavation Advantage
Automated Parking Systems (APS) minimize
the size and depth of necessary excavations compared to multi-story parking
garages. The reduced level-to-level height means that excavation depths for APS
are roughly 25 to 30% less than for conventional underground garages. This
translates into substantial savings in excavation costs as well as reduced
project risk, shorter schedules, less disruption and construction traffic.
Your Skyline representative can show you
all the advantages of underground parking with an APS.
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