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Recent content by ndjiji

  1. ndjiji

    When to conduct pile load test

    Hi, After pile driven into soil, when is the appropriate time to conduct the pile load test (maintained load test & pda test) 1. Is the resting period for skin friction and end bearing pile is different? I read that some suggesting straight away, some said 3 days, 2 weeks and even 1 month. 2...
  2. ndjiji

    Can i use undrained value for slope stability?(application of UU test)

    Hi, Thank you GeoPaveTraffic.. yes agreed on the rant. I'm a junior n just assigned with this case with only UU test data. i assumed now 1D-conso and CIU test results are important for road failure/settlement for road that had been constructed long time ago.
  3. ndjiji

    Can i use undrained value for slope stability?(application of UU test)

    thank you Retrograde So if the road was built for almost 8 years, then i guess the right way is to use the c' and phi' value for the stability analysis. Even if it is clayey material? The road seems to have settlement issues since open to public 8 years ago, can we assume that the PWP already...
  4. ndjiji

    Can i use undrained value for slope stability?(application of UU test)

    Hi, Can i use the cu value (phi=0) obtained from the UU test for slope stability analysis instead of using c' value from CIU test? If no, why it is not possible to use the undrained strength for slope stability calculation. I have road embankment failure/road foundation failure and only UU...
  5. ndjiji

    Plunger for CBR penetration test

    Thank you Ron! that helps! How about the area, shall the diameter follow the standard BS 49.65 +/- 0.10mm that will give nominal area f 1935mm2? The supplier can only supply with slight different of +/- 49.85mm that give approximately area of 1953mm. Does this affect the readout that much or...
  6. ndjiji

    Plunger for CBR penetration test

    Hi, We are trying to get a CBR penetration machine. The supplier sent us 2 penetration plungers to choose from; 1. 250mm long plunger 2. 150mm long plunger that is heavier than the longer plunger.have not weigh them but their weight are obviously different when holding them. The cross section...
  7. ndjiji

    CBR Test for pavement material

    Hi, Reading the last two posts made me have no conclusions of my questions earlier on. my office try to gather some info before buying complete set for CBR equipment. cbr test is one test that we shall comply with for material used in construction here. 1. I wanted to know the significant of...
  8. ndjiji

    CBR Test for pavement material

    Hi, I have questions regarding CBR test for subgrade /subbase/road base material that include compaction stage(sampel prep) - soaking stage - peneteration stage. 1. Stated in BS that the during preparation of sample/compaction test, solid base plate shall be used, then change to perforated...
  9. ndjiji

    Interbedded vs Laminated (Borehole Log)

    Thank you GeoPaveTraffic for ur explanation. it helps a lot. 1. so laminated and interbedded can be used in both soil and rock? 2.i usually understand when i put the layer name as "medium dense gravel with light brown sandy Clay"<----- (i simplified this name just for an example), it would be...
  10. ndjiji

    Interbedded vs Laminated (Borehole Log)

    Hi all, Whats the difference between laminated and interbedded when used in borehole log's description. Is it laminated silty clay is the same meaning with interbedded silty clay? Then, if the layer is medium dense gravel with light brown sandy Clay ; should it be written as medium dense...
  11. ndjiji

    Skin Friction Pile shall be terminated in which layer?

    Hey fattdad i read about that too. but sometimes i include the skin friction value as well when the pile set on weak rock with RQD=0%. Oldestguy, are you implying that i should only stop in stiff clay (stronger layer), but keep in mind the mobilised skin friction will be lower than the computed...
  12. ndjiji

    Skin Friction Pile shall be terminated in which layer?

    Hi oldestguy, I made up the example. However, i'm sort of calculating a skin friction pile right now. So i need a good insight for my calculation and overall understanding of the skin friction pile. The borehole shows stiff clay overlying the loose sand layer. however, above the stiff clay...
  13. ndjiji

    Skin Friction Pile shall be terminated in which layer?

    Hi,[shadeshappy] if someone could help me to understand this problem better. 1. For example if i have 8m stiff clay with underlying 10m loose sand.(only example) The pile will be mainly on skin friction. So let say i want to terminate the pile 9m b.e.g.l (including 8m into stiff clay and 1m...
  14. ndjiji

    Pile set and Pile load test - Friction pile vs End Bearing pile

    hi GeoPaveTraffic, Yes i agree with you on the soil type. However, do we still need to take final set for friction pile? For example, the pile will be terminated in medium dense sand not on rock.
  15. ndjiji

    Pile set and Pile load test - Friction pile vs End Bearing pile

    Hi, Can someone brief me the criteria of pile set and pile load test for friction pile and end bearing.Please correct me if im wrong as well. Friction pile - no set taken during driving, wait for at least 2 weeks for dissipation of negative pore water pressure n mobilisation of the friction...
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