The ECP Steel Pier™ belongs to a family of foundation repair
products that are sometimes referred to as micro piles, push piers,
or resistance piers. These foundation repair products are driven
hydraulically into the soil using the structural weight of the building
as a reaction force.
A friction reduction collar is attached to the lead section of
pier pipe. The purpose of the collar is to create an opening in
the soil that has a larger diameter than the pier pipe. This dramatically
reduces the skin friction on the pier pipe as it is driven into
the soil and allows the installer to load test and verify that the
pier encountered firm bearing stratum or rock that is suitable to
support the design load.
The ECP Steel Pier™ like other resistance piers is an end-bearing
pier that does not rely upon nor requires skin friction to produce
support. Each pier is field load tested after it is installed. The
piers are able to develop a factor of safety because the piers are
installed and load tested individually using the maximum weight
of the structure as the reaction force. The ability of the system
to develop significant factors of safety comes from the different
methods used between pier installation and load transfer during
restoration.
The piers are driven individually and the entire
structure works as the reaction; but during load transfer hydraulic
jacks are placed at multiple locations thus reducing the load on
each pier to only the design working load. A building with substantial
construction and rigidity can develop greater pier factor safeties
than a weaker structure. Contact us today to help you evaluate and
solve your foundations needs.