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    Tie-down anchors to be installed under water

    Dear fellow Engineers, This is my problem. I need to build a cofferdam within an existing canal. The subsurface material is rock and it is very permeable. My plan is to first construct a braced cofferdam and then construct a concrete tremie seal (3 ft)/tie-down anchors all under water. Once the...
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    Timber Pile Extraction

    Hello: I have a project (in NYC area)where existing timber piles (40 ft long) need to be removed to facilitate installation of new piles. If anyone can share his/her experience on such pile extraction (for projects, especially in NYC area) would be appreciated. Thanks in advance.
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    SPT 'N' =0 in Clay

    I have SPT 'N' data in clayey soils. For N=0 case, (or weight of drill rod)I need to find out what su value I can assign, say for a fully saturated sample (PL=39, W=76, LL=87) located under 1 tsf effective overburden pressure. (This is part of an exercise for slope stability analysis). I look...

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