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  1. MTNClimber

    Static Load Test

    They don't need to match, but they should be reasonably close. If your gauges say 0.500" and your wire says 0.125", you have something wrong.
  2. MTNClimber

    Soldier pile retaining wall deflection

    The soldier piles shouldn't significantly deflect vertically, but settlement behind the shoring system can result from lateral deflection and soil loss between the lagging.
  3. MTNClimber

    Soldier pile retaining wall deflection

    For me, 1 inch is reasonable for retaining sensitive areas and 2 inches for less sensitive areas. Anything more would require input from the contractor and owner about potential issues regarding deflection. Keep in mind that your calculated deflection may not be accurate. The software we use...
  4. MTNClimber

    Number of optical monitoring targets

    One at each column is a good start. From there, I would add one for each point of interest or sensitive feature.
  5. MTNClimber

    Deep french drain + sump

    You now have to direct the water collected in the underdrain to discharge somewhere else, hopefully downgradient of the house. It can connect to a storm sewer or daylight where erosion/scour can be limited or avoided. This could be a lot of water, so make sure to take that into account. It would...
  6. MTNClimber

    Reinforced slope erosion

    Looks like the site needs some better drainage provisions. But the slope didn’t massively fail. There’s just some surficial erosion and sloughing that needs to be addressed.
  7. MTNClimber

    Net Zero Disaster

    I agree Oops409. I want more information from an independent source not associated with green energy or fossil fuel industries. At face value, I don't know how one can say that it is safe when a field of solar panels gets smashed by hail storms. A cursory review shows that solar panels can...
  8. MTNClimber

    Strut Preloading Lock Off Load

    I’m not sure if you got my last message in the other thread. PEinc is the forum’s best resource for temporary earth support. If he chimes in, I would listen to his advice. 20% seems low. If you don’t care about deflection then it may be fine. Maybe the jack size is of concern? Ground...
  9. MTNClimber

    Frequency of laboratory Testing along Boreholes

    I'll echo geotechguy and say it depends on your area, the type of construction/site improvements proposed, and sometimes depends on the soil types. There is no written rule of a minimum. I would recommend talking to your supervisor. They should know the standard of care in your area and give you...
  10. MTNClimber

    Deflection Measurement

    You can’t find a “fancy” dial gauge? The internet has a ton of dial gauges for sale. What constitutes a “fancy” one?
  11. MTNClimber

    Deflection Measurement

    Attach a dial gauge with a magnetic base to a tripod and have it measure the deflection of the scaffolding. We do it all the time with pile load tests, soil nail tests, and tie back testing and lock-off. Ours measure displacement with a thousandth of an inch accuracy.
  12. MTNClimber

    I-195 Bridge Closure, R.I.

    I don't have all the information, but it appears to me and others I've talked to that this is simply a money grab and could be considered an attack on our local industry. The state's lawyers even alluded to the fact that they couldn't get money from RIDOT employees, so they're chasing anyone who...
  13. MTNClimber

    Field exploration elevation - how do you obtain it?

    Pretty much all survey-grade rovers are easy to use once they are set up. Someone unfamiliar with the process may need some help initially setting it up, but that’s what the distributor is for. Search for Emlid videos on YouTube and see if you’re interested in them. They also have the new RS3...
  14. MTNClimber

    Field exploration elevation - how do you obtain it?

    Does your state have a free RTK network? You can get a decent GIS-grade GPS unit for accurate x and y for $500 (Trimble Catalyst DA2 Receiver Kit). If you want accurate elevations too you can use one of the Emlid products. The Reach RX is only $2,800 with a pole. If your state doesn't have a...
  15. MTNClimber

    Material specification of round soldier piles

    There is no code that I'm aware of requiring a specific yield strength of micropiles used in micropile and lagging walls, just a minimum per AISC. The supplier can provide the micropile casing with testing reports showing a minimum of 80ksi, which is typical of micropile casing. The authority...
  16. MTNClimber

    I-195 Bridge Closure, R.I.

    From what I’ve been told, the contract increased the risk/liability for the Design-Build team. A major sticking point was the required two-year schedule for substantial completion, with fines for going past that date. I’m guessing the two years had to do with the gubernatorial election and were...
  17. MTNClimber

    Billable rate question

    This is the closest thing that I’ve seen to white paper research. Review the first comment for raw data and the previous year's surveys. The questions are pretty thorough, but anyone can lie. Also, note that the subreddit is filled with whiny engineers who want to get paid $120,000 for 1-3...
  18. MTNClimber

    Does anyone know what book this diagram is from?

    If you look at the references in the Drill Shaft Manual, you see this: Reese, L.C. and O’Neill, M.W. (1989). “New Design Method for Drilled Shafts from Common Soil and Rock Tests,” Foundation Engineering: Current Principles and Practices, Vol. 2, F.H. Kulhawy, Editor, ASCE, New York, pp...
  19. MTNClimber

    Depth of Borehole Investigation

    If you don’t have anticipated foundation loads, you won’t know how deep to go. Ask the structural engineer if they have ballpark foundation loads. Once you have those, run a preliminary calc on how many and how deep your piles need to go. Then use the guidance above to start planning your...
  20. MTNClimber

    Major Highway Embankment Failure June 8, 2024

    I'm right there with you. WYDOT should have done more to investigate what was going on, and luckily, the mudslide closed the pass, avoiding a true tragedy. I do think it's fair to compare man-made highway mountain passes with each other, especially when talking about the required maintenance...

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