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Hello Colleagues, What methodology would one employ to determine the insitu density or CBR of layered fill about 2m deep once proctor tests have been conducted for the layers. If the TRL DCP refuses early what other option can be utilised. Can the LWD be used for depths to 2m or more...

I understand what you've said but CIRIA (extract below)refers to frost action and potential heave

Good day esteemed colleagues, I have limited experience working with chalk and looking for some general advise or reference that speaks to the expansive/shrink-swell/volume change potential of chalk. I have suggested to a client that ground bearing slabs are unsuitable on the basis of...

Thanks both. Unfortunately I don’t have local knowledge to confirm typical strengths but I’m looking it up. I’ve always been of the view that RQDs relate in some way to rock strength so with the logs showing 90% RQD, I was surprised at the low PLT. I don’t have UCS for the samples but I’ve...

Good day colleagues, I’ve just received some lab results on rock that don’t seem to make sense. It’s on siltstones and sandstones Excellent RQDs throughout but the point loads are less than 1Mpa. Am I right to question these results or are they plausible?

Yes I agree with you about its use for pavement design - I was just curious about the questions I raised as I’d gotten myself confused.

Hi everyone, I am quite certain that the PBT can give you the ultimate bearing capacity for a soil at some depth depending on the diameter of the plate. When it it comes to stiffness is the value calculated a stiffness (resilient) is that for the bear surface or deeper material (as in the case...

Thanks for this both. I am only just starting to speak the lingo. Eirechch - are you a basically saying the same as Ron I.e the first paragraph?

Hi Esteemed members May be basic for some but I am looking to determine allowable/safe bearing capacity for a material that will be subject uniform load from a slab at grade. Is it wise to approach this assuming say its a large pad/strip and apply conventional bearing capacity theories. Thank...

Thanks a bunch.. Great info there

Hi members we all know we can conduct analysis from plate bearing tests to obtain: bearing capacity, CBR, stiffness and settlement. I've done this for a pad and strip foundations in the past but wanting to check if it is possible to undertake the analysis to obtain the settlement of a raft...

Good day, I've got a site that is partly on sand and partly on firm clay. The client wants to to use pads. Just not certain what measures required and the associated allowable bearing pressures to control settlement to avoid differential settlement between the two materials? Help most...