American Society of Civil Engineers


Building A Barrier Wall Through Boulders


by Donald R. McMahon, (McMahon & Mann, 2495 Main Street, Ste. 511, Buffalo, N.Y. 14214.), Michael J. Mann, (McMahon & Mann, 2495 Main Street, Ste. 511, Buffalo, N.Y. 14214.), and Robert C. Tulett, (Herbert F. Darling, 131 California Dr., Williamsville, N.Y. 14221.)

Civil Engineering—ASCE
, Vol. 64, No. 10, October 1994, pp. 60-62

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Document type: Feature Article
Abstract: Engineers and contractors conceived a novel approach to a barrier wall at a difficult site near the Niagara River in New York State. The site had been contaminated by a chemical company and remediation was underway. The cutoff wall was planned to define the site and to prevent any leakage into the nearby river. The wall was to be constructed on reclaimed land, but in the design stages, engineers discovered that the site had been filled with coarse shot fill, including boulders. This meant a conventional slurry wall would not work. Slurry could seep through the coarse angular rocks and possibly not set up at all. The slurry might also get into the river. The contractor suggested a soil-bentonite barrier wall to be constructed using trench boxes and parallel rows of steel sheet piling. The construction procedure is described in detail in the article. At a particularly porous part of the wall, jet grouting had to be used around water pipes that had to stay in service continuously.


ASCE Subject Headings:
Bentonite
Construction methods
Core walls
Niagara River
Remediation
Sheet piles
Site investigation
Soils