Posted in TAMWAVE

TAMWAVE 2021 Update

Getting ready for another semester of Foundations comes with a minor update to the TAMWAVE driven pile analyser, which includes axial and lateral settlement analysis and wave equation analysis of pile driving. The last major revision was in 2017 and details about that are here. The revisions this time are as follows:

  • Initial pile length reduced to 50′, and initial phreatic surface depth reduced to 25′.
  • H-Piles excluded from toe plugging.
  • Strain softening coefficient for soil shear modulus increased for more realistic values.
  • Toe quake for cohesive soils set to more conventional values, as Tomlinson’s method was used to compute Nq.
  • Added Davisson’s Method line for evaluation of virtual pile load test, and flipped the graph to more realistically simulate actual load-settlement curves. (See above for the new format.)
  • Marked the target SRD value differently to make it easier to see.

This will probably be the last update to the routine, which first went online in 2005. We hope that you find it useful.

Posted in Geotechnical Engineering

Retaining Wall Collapse on I-295 Project in Bellmawr, New Jersey

An MSE Retaining Wall suffered a dramatic failure last week closing the right northbound lanes of I-295 indefinitely. The wall is part of the Direct Connection Project to reduce congestion on I-295/I-76/Route 42 in Bellmawr, […]

Retaining Wall Collapse on I-295 Project in Bellmawr, New Jersey
Posted in Deep Foundations, Geotechnical Engineering, Pile Driving Equipment

Reconstructing a Soviet-Era Plastic Model to Predict Vibratory Pile Driving Performance —

The latest in our series of monographs on vibratory pile drivers, this one takes us back to the beginnings of vibratory pile driving in the Soviet Union. It was prepared for the ReSEARCH Dialogues at the University of Tennessee at Chattanooga in April 2021. The vibratory driver that started it all: the Soviet BT-5, used […]

Reconstructing a Soviet-Era Plastic Model to Predict Vibratory Pile Driving Performance —
Posted in Academic Issues, Civil Engineering, Geotechnical Engineering

My Review for the FE Exam Civil/Geotechnical Section

Over the years, my department has asked me to give a review session for my students before they take the FE exam. In this time of COVID, I’ve committed all my other lectures to video, and this one is now no exception:

I mention a few of things in the intro I’d like to elaborate on:

  • About ten years ago, it was brought to my attention that my students weren’t doing well on the FE Exam geotechnical section. My response to that was simple: “I’ll fix that problem.” I did that by aligning what I taught in class with what was in the FE “cheat sheet” (I’m sure NCEES loves that designation.) I don’t subscribe to the idea that we should only be “teaching to the test” but the FE exam’s geotechnical requirements are pretty basic, so that wasn’t much of a conflict. What has been tricky is that they’ve shifted around what they require over the years. But my students’ performance on the test has improved.
  • Since COVID I’ve put my lectures online. If you need to investigate some topics in detail, I’ve got them either at my Soil Mechanics or Foundations pages.
  • Once you’ve digested what’s presented in the video, you can and should solve sample problems. I just don’t recommend that you start your preparation doing that.
Posted in Uncategorized

In Memoriam: GZA Founder Donald T. Goldberg —

His contributions and legacy are reflected in the values of the company he built and the leadership he provided to the industry he loved. President and CEO Patrick Sheehan reflects on Don’s legacy. “It would be […]

In Memoriam: GZA Founder Donald T. Goldberg —

Since 2004 this site has hosted Goldberg’s classic document Lateral Support Systems and Underpinning.