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Chemical Sewer Replacement
Major Pharmaceutical
Manufacturing Company
Linden, New Jersey |
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Jet Grouting |
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Patented reinforced jet grouted columns provide ground improvement and groundwater control for
support of excavation at microtunneling shafts. |
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Project Overview: |
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Layne GeoConstruction designed and constructed over 1,000 overlapping jet grouted columns in silt
and clay soils to construct groundwater cutoff walls, excavation support systems and excavation
bottom seals, for an extensive sewer replacement project involving micro-tunneling technology.
Over 10,000 lineal meters of columns were installed, including a patented system of reinforced jet
grouted columns for excavation support at tunnel shaft locations. In addition, underpinning of
several sensitive structures was completed to support existing foundations, where tunnels pass
below structures. Underpinning was performed within operational structures in both tight access
and low headroom areas.
Both double and single fluid jet grouting techniques were employed, and columns of 700 to 2500
millimeters in diameter were constructed. Unconfined compressive strength test results on soil-cement
samples ranged from 30 to 55 kg/cm2.
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Value of Work Performed: |
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$4,000,000 |
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Project Duration: |
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18 months |
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Project Completion Date: |
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July 1999 |
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Project Reference: |
General Contractor
E.E. Cruz Co, Inc.
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Leo Plug
(732) 946-9700
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