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The
Scenario
One of the major issues the contractor faced with
this excavation was the presence of 5 crossing
utilities. The utilities ran perpendicular to the
excavation cut and the shoring system would have to
allow flexibility around these areas. In addition to
the crossing utilities the project also had an
adjacent valve box, as well as service road, which
increased the importance of providing a system to
maintain the structural integrity of the soil.
The
Solution
John Knighten had worked closely with the contractor
very early in the construction process and helped
supply budgeting and initial proposals to the help
with the bid package. John reviewed the specific
jobsite requirements with the contractor and
together helped anticipate the issues that would be
prevalent, as well as planning the best solution for
each issue. Given the presence of crossing
utilities, the system would have to be very flexible
around these areas. Hydraulic vertical shoring
proved to be the best option for these systems, as
it would allow the requisite protection to be set
around the crossing utilities while shoring the area
according to OSHA guidelines. Hydraulic aluminum
shoring shields were selected for the longer linear
runs to provide a quicker installation than the
vertical shores.
The combination of hydraulic vertical shoring and
aluminum shoring shield provided the contractor a
easy system to install on longer runs and the
ability to shore crossing utilities with the
vertical shoring. In addition, since both systems
were hydraulic, the contractor was able to
pressurize both systems out and provide pro-active
protection against a soil collapse. The pro-active
protection helped to ensure the structural integrity
of the adjacent structures, as a soil collapse would
not undermine the foundations. The system worked
very well for the contractor and adapted well to the
excavation's requirements as needed. The project
completed efficiently and without any safety
incidents.
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