| BRAVERN PHASE 1 AND PHASE 2
Although the project broke ground in the early summer
of 2006, the conception date for MDCI occurred 10 years
previous. The construction of a 91' deep soil nail wall
within a 7 acre footprint was a challenge, but considering
this excavation was 46' below the existing water table
raised concerns which were difficult to argue. The answers
to everyones questions came from the MDCI dewatering
division.
On May of 2006 MDCI mobilized a BG 36 drill to install
30 deep wells around the perimeter of the site to depths
in excess of 130 in soils consisting of dense Glacial
Till overlying Advance Outwash which was riddled with
cobbles. Once the wells were functioning they would
produce an average of 1500 gallons a minute 24 hours
a day, 7 days a week. Once the water was effectively
drawn down, the wells maintained a steady flow rate
of approximately 200 gpm. The effectiveness of the dewatering
allowed MDCI to install a total of 147,000 square feet
of shotcrete soil nail shoring. Given the excavation
depths, the nails were long and the quantity abundant.
MDCI installed a total of 4,443 soil nails many of which
were at depths of 61' in length. In total, MCDI had
36 miles of soil nail drilling during Bravern shoring
operations.
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