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  • Users: jg11
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  1. jg11

    Depth of influence for raft foundations

    Thanks for the reply.
  2. jg11

    Depth of influence for raft foundations

    Hello I am advising on the founding depth for a raft foundation for a warehouse on soft clay. I want to calculate the depth of influence as there is a hard layer near to surface, if I treat the raft as a slab (so this would 35m x 20m) I am being too conservative? Would it be more realistic to...
  3. jg11

    Bearing Capacity of Engineered Fill

    Hello I meant 250kPa allowable bearing pressure. The trouble is the client wants to use material which is not well graded (100% passing sieve 4 and 50% passing sieve 200). This is due to the location of the site and difficulty accessing other fill materials. CBR lab tests = 11.25, I make...
  4. jg11

    Bearing Capacity of Engineered Fill

    Hello We are doing the geotech for a plant site. The site needs 250kPa bearing and has been stripped to good ground. However in order to get the correct levels the client will be placing engineered fill. Is it it possible to use the CBR to indicate the bearing capacity of the fill once...
  5. jg11

    Dam Slope Stability

    Thanks again for the replies There are no buildings/infrastructure within the flood zone. The matrix material which is borrow from nearby is Sandy Clay SILT 20/20/60. Good point about the strength increase of the cured mix, so the dam will probably be strong enough after 28 days or less. I...
  6. jg11

    Dam Slope Stability

    Hello Thank you for the replies, the mix is 5% cement and has a tested k=3.9x10-7. The dam was 3:1 upstream and 2:1 downstream. I have changed the downstream slope to 2.5:1 and the FS is still below 1.5. The dam is homogeneous. If I follow correctly my assumed c' is too low for a soil with...
  7. jg11

    Dam Slope Stability

    Hello I am calculating the slope stability for an earth dam. The material has been mixed with cement and has a cu=190kpa. When the slope is modeled in an undrained state for seimic load of 0.33g it holds up with an FS over 3. However the drained steady state model c'=7 and phi=37 (assumed...

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