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Recent content by samond

  1. samond

    High Ground Water vs. Laying Sanitary Pipe

    Thank you all for your replies! I will check into a geotechnical engineer. I appreciate it. :)
  2. samond

    High Ground Water vs. Laying Sanitary Pipe

    Could anyone living in areas with high ground water give me some ideas about laying pipe in these conditions? Almost 2 years ago we laid a sanitary main in an area with high ground water and heavily saturated soil. We lost almost all the road and brought in truckloads of boulders that were...
  3. samond

    GeoKrete Geopolymer? Review

    Would anyone like to vouch for GeoKrete Geopolymer? Our municipality usually rehabs our manholes that have been deteriorated by H2S with calcium aluminate and then an epoxy coating. A contractor has requested we try a geopolymer instead. Could anyone speak to the performance of this material...
  4. samond

    Crushed Concrete Used as Soil Stabilization?

    Has any one had experience with crushed concrete being used for soil stabilization? The contractor is hogging out soupy muck from an 8' wide sanitary sewer trench. We are requiring the contractor to place 6-12" rock and apply pressure until the rock cannot go any deeper (so far it has been...
  5. samond

    Pipe Stiffness vs. Pipe Rigidity

    Can someone tell me if there is a difference between stiffness and rigidity of a pipe? I understand that pipe stiffness is used to describe the load vs deflection relationship. We are planning on sliplining an 18" pipe inside an existing 48" pipe and have it "float" via grout to the crown of...
  6. samond

    Water Pressure and Steel Yield Strength

    Ron, Thank you for all of your input. I can see how I am confusing my situation as a simply supported beam, since it will be welded on all four sides as opposed to two. I will look for Roark's formulas.
  7. samond

    Water Pressure and Steel Yield Strength

    Thank you all for your replies. We need to block water in the aeration basin.
  8. samond

    Water Pressure and Steel Yield Strength

    Thank you for your reply. This steel plate will be welded to an existing steel frame. Instead of the 15' water depth I will use the actual depth of the the basin for the pressure on the plate. I do not have access to FEA modeling and googled Von Mises equation. There is a sentence in...
  9. samond

    Water Pressure and Steel Yield Strength

    I am trying to figure out what thickness of steel plate and type of weld will be necessary in a aeration basin to block an opening. The water level will be 15' deep and the gate will be 62" squared. I know that the hydrostatic pressure is the same in all directions at any given point and I...

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