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ExcEng thanks. Yes assuming a rigid frame. you will need to excuse my ignorance but I don't follow 1/2kx^2 what are k and x? Can you take a look at my induced compressive stress equation above, have I got my units correct for the result?

Thanks Once/Archie. I am essentially following your advice Archie by estimating a deflection within the timber but I am trying to justify that by showing induced compressive stress is in fact beyond yield in compression but also not ridiculously beyond that the timber cushions are...

I am trying to work out induced compressive stress in a member from a dynamic load (a dropped member) using a formula taken from strength of materials, Case and Chilver second edition - 22.6 (rod struck by a moving mass). Has anyone ever worked through the example? Its part of an overall problem...

The basis of the problem is the fact that the system is 3 sided. The short side wales will be welded to the side walls and I am relying on soil shear strength * contact area of sheet pile to resist them. Once calculated my resistance is close to 6 times the transmitted load so I am relatively...

thanks chicopee. The system is essentially your highway cofferdam halved, three sided, all framed with diagonal struts. the load transfer to the side walls is not a problem as shear cleats carry the transverse waling load into the side walls. Its the further transfer of that load into the soil...

Thanks. Its the judgement part that I am most concerned about. I guess if the sheet pile wall was ridgid then the soil shear capacity calculated as a failure plane on the back side of the piles would give me an indication of its suitablility or not. Frictional resistance I think would be the...

As a general rule a minimum surcharge of 10 kN/m2 can be used to cover general items of construction plant however heavier plant should be calculated indiviually. Do determine the static pressure from your excavator you need to take the gross weight over the area of tracks in contact with the...

I am checking a temporary works scheme and I am looking for help resolving a particular element. The scheme consists of a 3 sided sheet pile wall (11m back face and 10m long side walls) with earth support at toe and a single waling level. My issue is that the waling is part of a bracing system...