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Hart Street / WWPS / Pier 2
Force Main Replacement Project
Sand Island, Honolulu
Oahu, Hawaii
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Jet Grouting |
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Jet grout columns provided soil stabilization and support below deep piles supporting 500
ton crane loads, during tunneling of twin 1.2 meter diameter pipes.
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Project Overview: |
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Work was undertaken within the main shipping terminal between Hawaii and the mainland. In one area, jet
grouting was performed at a depth of over 38 meters along the alignment of two 1.2 meter sewer lines that
were subsequently tunneled below the terminal pier foundation piles. Working from a pile-supported platform
and over water along Honolulu Harbor, multiple, continuous rows of 2 meter diameter, interconnected columns
were installed above and below the tunnel alignment to stabilize the soils and prevent foundation subsidence
during the installation of the tunnels.
Jet grouting was also completed at micro-tunneling receiving and jacking pits to provide support to existing
utilities and the surrounding ground, as well as for groundwater control during construction. Jet grouted
columns at pits were installed to depths up to 16 meters within fill materials, and sands and silts.
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Value of Work Performed: |
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$1,400,000 |
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Project Duration: |
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8 months |
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Project Completion Date: |
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December 2000 |
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Project Reference: |
Engineer Consultant:
URS / Woodward Clyde
(808) 737-5300
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