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  1. henders1

    gnss survey without cellphone signal

    OK, thanks. So I can see several UK Ordnance Survey CORS stations typically within 30km to the sites I am looking at so I presume that if I use that data in conjunction with the raw RINEX data collected by the Trimble, then post processing using the Trimble software can give me the accuracy that...
  2. henders1

    gnss survey without cellphone signal

    Thank you for the reply. Is this still the case when the R10 is just a single rover unit and there is no base station. I meant to put this in the first post. The sites are in the UK, I don't know if that makes a difference.
  3. henders1

    gnss survey without cellphone signal

    I am looking to purchase a trimble r10 or similar for several engineering projects where I require centimetre level accuracy topographic information to design engineering works. Some of these sites are in areas of poor cellphone signal so I wont be able to get accurate co ordinates at the time...
  4. henders1

    Drainage Design software in UK

    I am looking for a reasonably priced software package to carry out drainage design for a UK based project including attenuation pond sizing, infiltration trench design and the like. I dont have the budget for the full WinDes product from Microdrainage. Any ideas ?. Can the Hydro CAD product be...
  5. henders1

    Shotcrete Wall over Rough Rock Surface - Chain Link Fence Reinforcemen

    have you considered using steel fibre reinforcement as an alternative to mesh reinforcement or chain link, you would be able to design the sprayed concrete structure to span between anchor heads and make major savings in amount of concrete used due to the structure following the shape of the...
  6. henders1

    Lateral pressures due to steep slope surcharge

    British Steel Piling Handbook gives guidance on this. Assume horizontal surface, then increase pressures by 5% for each 5 degrees of inclination above the horizontal. Not sure where you are based, but in the UK, the Piling Handbook would be considered to be a sound reference text
  7. henders1

    settlement of clay fill

    Thanks for the responses so far, these are very useful. Hadn’t seen that NAVFAC book before. The site in question is for an industrial estate and the exact loadings are not known at this stage. I expect that there will be steel portal frame structures with a floor slab, ground bearing if...
  8. henders1

    settlement of clay fill

    looking for information on typical settlement of recompacted stiff sandy clay fill to be used as a structural platform for industrial buildings. columns likely to be piled, but ground bearing floor slabs will be used if posible. anyone have any case studies on what magnitude of settlement might...
  9. henders1

    ground anchors in pfa

    anyone had any experience of design of ground anchors in a slope constructed out of pulverised fuel ash (pfa) for a retention structure at the top of an embankment. i have been trying to find any case histories on the topic to see if it is a feasible anchorage medium
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