Having just repaired two rock slides (I-40 and US 64) which cut TN and NC off from each other, we've got excitement from below around here:
http://news.tennesseeanytime.org/node/5174
http://www.pz27.net
TN DOT's geologist spoke at our ASCE branch this noon, an interesting job:
http://www.tdot.state.tn.us/US64rockslide/
Especially this, the onsite camera:
http://oxblue.com/pro/open/tdot/us64rockslide
http://www.pz27.net
I am currently involved in a project which involves a large (> 10,000 lb) steel sand casting for a pile driving accessory for this type of equipment:
http://www.vulcanhammer.info
The casting has section thicknesses of 2 1/2" and upward. It is being produced in ASTM A148 Gr. 90-60.
The end...
I am in the process of designing some air driven pile driving equipment.
For many years, the company I worked for/was principal in designed and built pile hammers with a Corliss style valve. In the late 1960's we added a valve liner with an o-ring mounted in the corner of the liner. A chamfer...
I've taken some photos of this project you guys might find interesting:
http://vulcanhammer.net/#fus_117
http://www.vulcanhammer.net
http://www.vulcanhammer.info
Just to let everyone know that my association with Pile Buck--and that includes being its Editor--is at an end. The initiative to end it was mine.
I'll keep you posted on what's next...
One of the curious things I have noted in classical sheet pile design is the fact that treatments of Terzaghi's techniques to analyse braced cuts and the strut loads generally insist on the hinge method to analyse the sheet pile wall itself, i.e., to assume hinges at each strut location except...
As most of you have probably figured out by now, I am the editor of Pile Buck, amongst my other activities.
Pile Buck is trying to get going again. One issue of the newspaper is going to press and we are working on yet another. Do any of you have a jobsite story that you might want published...
Just wanted to say thanks for the invite. And, as the maintainer or vulcanhammer.net, I'm always open to posting documents (so long as the copyright isn't a problem.)
I managed to come into possession of part of the engineering library of Harry Lindahl, who worked for US Steel for so many...
In publications such as DM 26.5, the current yaw moment arm vs. current angle for a moored vessel is zero at 0 degrees, rises then begins to decline around 20 degrees, crossing the x-axis around 90 degrees and continuting to decrease until around 160 degrees, then rising to zero at 180 degrees...
