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  1. GOTEK

    High Mast Arm Design

    Our Agency has completed very few high mast arm designs, a limiting bearing capacity of 3 ksf is typicaly used, except for those foudations constructed in poor soils I am designing four mast arm foundations using drilled shaft design and FBPIER in combination with LPILE to quantify deformation...
  2. GOTEK

    Localized Soil Failure in Crib Wall

    Riggly, You say that the soil loss is from the vertical face and yet the soils are fairly dry. What is the composition of the soil lossed is it predominantly fines or is it similiar to the backfill material? What is the age of your retaining stucture? Would you consider facing the structure as...
  3. GOTEK

    Localized Soil Failure in Crib Wall

    Hi Riggly, You don't mention the condition of your walls so I am assuming that you're walls are in good condition and you're only concerned with the loss of material in your crib wall. How many cells have lost soil, i.e., is it localized or global? Where are the voids...is there a predominant...
  4. GOTEK

    Preconstruction Surveys

    Ron & Explo, I appreciate the response, my problem is we are the DOT and we don't have a procedure. I basically am followig guidance given in one of Charles Dowding's texts. I wholeheartedly agree that a third party is best to eliminate bias...but since the third party(s) has consistently...
  5. GOTEK

    residential foundations in peat

    I just wanted to emphasize what others have already told you...peats even if normally consolidated still exhibit significant secondary settlement, therefore, accounting for downdrag is critical. I am working on a roadway project with organic silts and peat ranging from 20 to 30 feet thick...
  6. GOTEK

    Preconstruction Surveys

    I'm looking for information on how to conduct a preconstruction survey. There are several "tired" foundations nearby our pile driving operation and I would like to limit our liability by taking some photos, video, and measuring some foundation cracks. We will be monitoring vibrations during...
  7. GOTEK

    Caisson Foundation Design, Steel Requirements

    jmiec is correct to explain a bit further: "Section 10.9.1 of the ACI code states that the area of longitudonal reinforcement for concrete columns must be not less than 1 percent of the gross concrete area, Ag. If, however, the cross-section is larger than required by considerations of...
  8. GOTEK

    Undisturbed vs. remoulded shear strength

    First, 5 kPa = 104.43 psf. Was Su reported from a vane shear test? I'm guessing probably not since no remolded value was given. Your reported undrained shear strength is low but not uncommon. The remolded shear strength is related to the Sensitivity of your clay...sensitivity is the ratio of the...
  9. GOTEK

    Underconsolidated Soils

    I am trying to ascertain how much more settlement I can expect along a stretch of highway adjacent to a lake. I have conducted several consolidation tests, UU, and CU tests. The soils range from med. dense fill material (sands and gravels) to highly organic soil as well as some very loose silts...

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