geohec:
In January, my firm decided that our field vane shear equipment was not being utilized when it should/could be. It was decided to try to use this testing method more often, when applicable. Had the equipment by just did not use it.
It is a test we can do ourselves and will most...
I now have a copy of the Ladd paper. Very long paper.
dgillette:
I like the select overexcavation idea. The embankment is quite large. This would save a lot of excavation. Thanks.
I have never felt confident in the UTEXAS search program either.
Thanks again.
I will perform the wedge analysis with many trials.
Removing the 5 ft of soft material will be an option that will be provided. I would like to have an accurate determination of the "actual" factor of safety so the cost of overexcavation is justified.
Thanks to all for the responses.
More information:
The soft layers are thin. There are two low strength layers in the foundations. Silt and Clay (C=700 psf) layer about 2.5 feet thick underlain by a Silt (C=200 psf) layer about 2.5 feet thick. Silty Sand is above the Silt and Clay layer and Silty Sand is below the Silt...
Clarification:
First stage embankment height is 30 feet. I typed the wrong height in the second sentence second paragraph. I am using UTEXAS3 for the analysis.
I am/will look at the undrained analysis.
In my literature search I found the Ladd, 1991 paper, but can not find a copy. Any help...
I am evaluating roadway embankments over soft soils C=200 to 700 psf. The maximum embankment height is 86 feet. Using a 2.5:1 slope, the factor of safety is 1.15 < 1.3 = FS required. I do not want to go to a 3:1 slope due to right-of-way issues.
I was going to look at staged construction...
I have been told twice in my career (when I was offered a higher position that I was not sure I should accept) that if I did not accept a position when offered you will never be offered any other position in the future.
Upper management feels you can handle the position or they would not offer...
Sounds like the masonry wall was not reinforced during construction. Building a second wall is expensive.
In similar situations we have excavate the basement wall and found that the masonry wall will return to its 'as contructed' position. Typically, the backfill is unacceptable and no...
RobPE
Virginia Tech has a report issued from their Center for Geotechnical Practice and Research titled "Comparison of Computer Programs for Analysis of Reinforced Slopes" that may be of interest. Dated December 2000 and costs $50.00.
http://cgpr.cee.vt.edu/
goto research reports then bottom...
blueoak:
Thanks for the references.
The 14 foot high structure in question was constructed in 1842. Thats 164 years of services. For timber crib that is impressive. The structure has been concrete capped, had sheet pile added up stream and who knows what else over the decades.
We can not...
My firm is preparing a proposal to provide engineering services to investigate and rehab (if applicable) an existing timber crib dam. I am looking for any references on the design and analysis of timber crib dams.
Thanks for the help.
Is the top of foundation 2 to 3 feet below the ground surface both inside and outside the foundation? If this is the case and you want an 8 foot basement ceiling, then lay the extra block to obtain the desired first floor elevation and place the basement slab on the existing ground surface...
Thanks for the responses GeopaveTraffic and MRM.
I had one additioal specimen tested at a confining pressure of 42 psi. This mohr circle was much larger than the 28 psi circle. The Pc point must be at an even higher pressure. I am in the process of getting approval to run the consoliation...
