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  1. MelCao

    Subgrade Reaction Method for Retention Wall

    Hi Avscorreia, I will definitely have a look at the books you recommended above. Hi Geotechnicalengineer1, I have Wallap manual, but it's not very detailed on steps of calculation. But thank you all.
  2. MelCao

    Subgrade Reaction Method for Retention Wall

    Hi, Does anyone know any book introducing in details how to use sub-grade reaction method to analyze retention walls? Wallap uses this method to calculate bending moment, shear force, deflection etc. using this method. If it's not too difficult I am thinking to program it myself. Regards
  3. MelCao

    Any reliable software for designing of piles under vertical and lateral loadings

    Hi avscorreia: Thanks for your reply. i understand that we can do mannual calculations for these retaining structures. The thing is we are a contracting company, when we do the design we are walking on the edge, we need to get min. acceptable FOS, this is how we save money for the client...
  4. MelCao

    Any reliable software for designing of piles under vertical and lateral loadings

    I did the search as well, and aslo found these programs, however i heard from another engineer he said the all-pile is not accurate. he is the manager, if he votes no i can't use it in the company. Wondering if you work in a big consulting firm? usually big firms use more reliable approaches...
  5. MelCao

    Any reliable software for designing of piles under vertical and lateral loadings

    I am from a small piling contracting company, currently we use spreadsheet to calculate the vertical capacity of the pile based on the shaft resistance and base resistance. very often piles are also under lateral loads such as wind, earthquake, then we use Wallap to model the piles under a...
  6. MelCao

    Driven Pile Foundations - Capacity Estimation Using PDA Tests

    the PDA should give you some curves showing the resistance during the driving. what you can do is to estimate the soil parameter in their program to match back the curves to the real curves, this how you verify the soil parameters, then you use conventional pile design method to calculate the...
  7. MelCao

    Waler Strut Connection Design

    Firstly, is it a steel structure or concrete structure? the connection could be very different for those different structures. the waler design is majorly a bending moment check. you take the soldiers as 2 supports, and the earth pressure distributed evenly on the waler, then it's like a simply...
  8. MelCao

    undrained shear strength

    Better not to use this correlations,It could give you a range and often big range. You can't use this formulated correlation to calculate and use the result. I beleive the water content, LL, PL tells you how much pores in the soil, and the natural of the soil particles in terms of how cohesive...
  9. MelCao

    Estimating the allowable spacing of soldier pile wall

    Hello Everyone: I design many soldier pile retention walls for some excavations. there is one thing I am not sure how to estimate the allowable spacing of the piles allowing for the arhing effect between the piles. I am wondering if anyone can reccommend some good references to explain how we...
  10. MelCao

    Direct Shear - Pore Water Pressure - Undrained and Drained

    you better get undrained parameters from direct shear test for clayey soils. it takes long time to get completely drained. and for many cases, the retention structure the undrained condition is more critical.
  11. MelCao

    FHWA - Circular No4 Reese-Wang Eqns

    can you please explain more details? what is FHWA?? America code?
  12. MelCao

    Drilled Piles Cost Estimate for UK

    Well, i am in Australia and doing bored pile estimating and design. our price here for piles of 18m long, and this quantity, and 8m rock, could be up to 1500 AUD per cu.m or even more. I am not sure what rock you talk about, for hard rocks it takes ages to drill 8m with normal drilling rig.

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