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  1. cad0211

    LPILE Group Effects

    Do you know how to do that? I am only given one value for the p-multiplier in my soils report (0.75) but I see in the manual that you must put it based on distance from pile head.
  2. cad0211

    LPILE Group Effects

    What about the p-multipliers for group effects?
  3. cad0211

    LPILE Group Effects

    I am trying to run LPILE for some cored piers that are 3 diameters apart. Per the soils report they must be a minimum of 5 diameters apart in one direction (normal to the load) and 8 diameters apart (parallel to the load) or else I need to use a reduction factor which they gave me. How do you...
  4. cad0211

    LPILE Soil Parameters Question - cohension/undrained shear strength

    I am trying to work my way through using LPILE for the first time and I'm trying to replicate references from previous jobs from before I was here. For the soil parameters, are cohesion and undrained shear strength considered the same thing? I'm seeing them used almost interchangeably and they...
  5. cad0211

    LPILE Clay classifications

    For LPILE, you have to pick the type of soil in each layer and for clay there are a few options (ex: soft, stiff, etc.). In the soils report I'm working with they just say "clay" under the LPILE parameters table. If I go to the boring log they give labels such as "lean clay", "fat clay", "lean...
  6. cad0211

    LPILE Top soil layer question

    For LPILE, when you want to ignore say the top 5 ft of soil do you input that into the soil properties or just start the first soil level at a lower depth?
  7. cad0211

    LPILE

    I am trying to learn how to use LPILE on my own. Does anyone know of any tutorials or instructions for how to use the program? Currently I'm working just with the manual and it's quite tedious.
  8. cad0211

    LPILE Top soil layer question

    For LPILE, when you want to ignore say the top 5 ft of soil do you input that into the soil properties or just start the first soil level at a lower depth?
  9. cad0211

    LPILE Clay classifications

    For LPILE, you have to pick the type of soil in each layer and for clay there are a few options (ex: soft, stiff, etc.). In the soils report I'm working with they just say "clay" under the LPILE parameters table. If I go to the boring log they give labels such as "lean clay", "fat clay", "lean...
  10. cad0211

    LPILE Soil Parameters Question - cohension/undrained shear strength

    I am trying to work my way through using LPILE for the first time and I'm trying to replicate references from previous jobs from before I was here. For the soil parameters, are cohesion and undrained shear strength considered the same thing? I'm seeing them used almost interchangeably and they...
  11. cad0211

    Undercutting question

    We received a soils report on a project that says the following: Recommends that structures, where shallow slab-on-grade foundations are being considered due to tolerance for some foundation movements, utilize preparations recommended herein to reduce the PVR to on the toher of approximately...
  12. cad0211

    Hydrostatic uplift pressure on a spread footer

    "Also be careful that your bearing capacity analysis was performed with the water level assumed for this limiting condition." Sorry could you explain a little more what this means? The water has an effect on the allowable bearing pressure? I spoke to the geotechnical engineer on this project...
  13. cad0211

    Hydrostatic uplift pressure on a spread footer

    I am looking at a possible foundation design on a site where the worst case water table is 4 ft below grade. Our spread footer is deeper than this depth so we are concerned about uplift from the water. What area do you use to apply the 62.4 pcf of water pressure to the foundation? I was...
  14. cad0211

    Anchor bolt embedment question into existing concrete

    We need to embed new anchor bolts into an existing foundation. I have attached a sketch showing a similar design to what we're planning to do. Basically my question is how much concrete cover do you need above the anchor bolt to the edge of the top of concrete (see red marks on sketch)? We are...
  15. cad0211

    difference between slab on grade and mat foundation

    What is the difference between a slab on grade and a mat foundation?
  16. cad0211

    Turned down slab

    Here is the rebar detail. It is necessary for the equipment sitting on the foundation. It's a reactor that requires magnetic clearance so no closed loops for metallic parts.
  17. cad0211

    Foundation design manual or book to refresh

    Is there a good foundation design manual or book that would be helpful for a civil engineer who has been working in construction management and is making the transition back to a foundation design role? Thanks!
  18. cad0211

    Turned down slab

    The drawings are about 20 years old so we don't have an explanation but we thought maybe it was a frost depth issue? Or because of the soft clay soil. No way we can be sure though.
  19. cad0211

    Turned down slab

    We're working on putting new equipment on an existing foundation. I have attached a picture of the existing foundation. When evaluating bearing pressure on this type of foundation, what area can you use for the bearing area? We assumed it's just the turned down area (in this case the 1'-6"...

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