Below are photos taken during the installation of Helix Anchors in a cluster formation.  There are twenty one (21) Helix anchors installed in an area of about 8' x 10' at surface level.  They are installed at a 15 degree angle outward to increase their supporting capability.  The Helix were installed all the way to bedrock some 35 feet below the surface.  They are rated to support 100 kips or (50 tons) each!  These Helix Anchors along with standard concrete foundation are to support a several story tall parking garage.

Click on the picture to enlarge it

Guiding the Helix into place before
installation begins.

Installing Helix anchors using an
escavator-mounted torque head.

Adding another section of high-strength
pipe before continuing installation.

Here you can see the other Helix anchors 
protruding from the ground at different
angles, this was done purposly to
increase load bearing capabilitiy. 

After all the Helix are installed they are
capped and ready for rebar and
eventually concrete.

The Helix Cluster now has rebar installed
all around it to increase the concrete's
strength even more.

Another angle of the Helix Cluster
under the rebar.

Cluster/rebar ready for concrete.  When
finished this will be the bottom corner of
a parking garage consisting of several
floors.