La Verkin Apartments - Structure Stabilization Case Studies
As a property manager for multiple units, repairs are never welcome. But
fixing multiple repairs at once is always an ideal course of action. Severe
damage due to foundation settlement was one issue for The La Verkin Apartments
in La Verkin, Utah, and the owner was looking for the type of solution
that could take care of multiple units all at once.
The back corner of the structure was built on a compacted fill pad atop
loosely compacted canyon fill soil. Over time, the weight of the new fill
along with the structure compressed the canyon fill soil, resulting in
foundation settlement and movement of the apartment building. Throughout
the structure, signs of foundation settlement and damage were evident,
including cracks in the walls and ceiling, ill-fitting doors and windows,
and a concrete barrier behind the building that had cracked completely through.
Ram Jack Utah proposed the use of driven piles to penetrate the compacted
fill soil which included cobbles. The piles would be installed along the
border of the existing foundation and spaced 6-7 ft. apart to maximize
lift and support the weight of the structure.
Over the course of two days, Ram Jack Utah installed nine 2 7/8 in. driven
piles to a design load of 24.5 kips. The piles and standard brackets reached
an average depth of 37 ft., lifting the structure as much as 4.5 in. for
complete restoration of the structure to its original position. The depth
of each pile varied along with the original canyon bottom below and were
extended to a suitable load bearing strata. After raising the slab, the
void created was filled using the slab jack method, in which a specialized
material is force-injected under the slab lifting it back to its original
placement. After Ram Jack was finished, the owner was impressed with the
work. The owner expressed excitement seeing that the large cracks throughout
the building had closed. He was also very pleased to find that the doors
and windows now operated smoothly.
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