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63rd Street Tunnel
Brooklyn, New York
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Jet Grouting
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Jet grouted columns provide crown support for large
pipe jacking project, through glacial till deposits containing
boulders and cobbles. |
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Project Overview: |
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Layne GeoConstruction designed and constructed an array of jet grouted columns to stabilize a zone of unstable
boulders and cobbles, containing little to no fine soils, and to mitigate collapses and sink holes which had
been generated prior to the use of jet grouting. The work was performed from pavement grade, utilizing the
single-fluid jet grouting method, to reduced impacts to a residential roadway.
Jet grouting was performed along the alignment of the proposed 102-inch diameter sewer tunnel in advance of the
pipe jacking operation. The column configuration consisted of a continuous block of jet grout columns for the
full length of the pipe alignment. The columns were constructed outside the edges of the pipe to a depth of
approximately 38 feet. The remainder of the columns within each row were terminated above the top of the pipe to
facilitate the open face pipe jacking method that was employed.
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Value of Work Performed: |
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$350,000 |
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Project Duration: |
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1 month |
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Project Completion Date: |
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May 2001 |
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Project Reference: |
General Contractor
E I C Associates
Joseph Branco, President
(973) 297-5230
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