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  1. bobbygee

    bottom slab stresses in submerged structures

    jdonville, Thanks for your response.The "unbalanced hydrostatic forces" that we are discussing arise from the following assumptions:1.The manhole itself is empty. 2.The compacted backfill around the manhole (plus the weight of the concrete) resists the bouyancy due to saturated soil conditions...
  2. bobbygee

    bottom slab stresses in submerged structures

    In our office there is a discussion of the need for reinforcement in the concrete slab for 4 foot diameter wastewater fiberglass manholes. The manufacturer recommends a minimum six inch concrete pad poured to anchor the manhole with additional concrete poured inside the manhole to form a channel...

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