Is there an advantage to hydraulic vs pneumatic controlled direct shear test machines?
Section 6.4 of ASTM D5607 states that for maintaining the Normal Pressure: “hydraulic component that will hold a pressure, within 1%”.
For shear displacement, Sect 8.6.2.2, no explicit hydraulic...
I'm looking for a good debugging program for Fortran 77. Any suggestions would be appreciated.
I've been working with the VBA for Excel debugger a bunch lately, which is very slick, and would like something similar for Fortran.
Thanks
I'd like to make a simple column chart in Excel with multiple data series. However, I don't want the series to plot next to each other which is the Excel default; I'd like to plot the series grouped together. The easiest way to explain is with a simple example of temperature data. Say you want...
I'm interested in how you all would go about interpreting vibrating wire piezometer data in the following scenario. Say a VWP reading indicates very slight pore pressure and was installed in a formation that is tight hydraulically speaking, so not much water was expected when drilling the hole...
I'm looking for advice on the proper grout mix for VW piezos installed in fully grouted boreholes.
With VW piezo installations in fully grouted holes, the rule of thumb, as I've come to learn, is to mix the grout so that it mimics the strength of the surrounding formation. However, the grout...
I was wondering what are some of your thoughts regarding the timeframe for the boom in commidty prices we are currently enjoying. An article in a recent issue of SME's Mining Engineering addressed the issue, but in the end never came to a prediction. I've heard people talking about the current...
Is anyone familiar with Tim Starks research on correlations between Atterberg limits and residual shear strenngth in clays? I stumbled across this reference in an old thread:
http://eng-tips.com/viewthread.cfm?qid=50241.
ramram2 posts "You can also check out Tim Stark's research in the...
Due to the difficulty of getting repeatable results and the time required to determine the liquid limit using the Casagrande LL device, our lab guys have explored alternatives to determining the LL in the lab and have come across what is known as the DROP Cone Penetrometer (for LL testing in the...
In ASTM D 4318, Test Method for Liquid Limit (LL), Plastic Limit (PL), and Plasticity Index (PI) of Soils, there is the option to state that the sample was tested and determined to be Non-Plastic, NP (section 19.1.1). This is done if either the LL or PL could not be determined or if the PL is...
I'm looking for any objective comparisons on the various method of slices programs. The following two threads present some opinions on various method of slices programs:
http://www.eng-tips.com/viewthread.cfm?qid=25633
http://www.eng-tips.com/viewthread.cfm?qid=136148
I've come across other...
Does anyone know of any guidelines to concrete stitching for large (25' x 0.3") residential slab on grade cracks? I'm looking for guidelines such as spacing of stitches, stitching material (rebar vs carbon fiber), length of stitches, and epoxy procedures such as injection method, epoxy types...
I have a project at a south american coal mine where the goal is to mine as closely as possible to a nearby rail line to maximize coal reserves. We're dealing with about 80 ft of overburden in the area. My initial thoughts are that conventional slope stability analyses (method of slices or...
I have a client whose house is experiencing foundation problems of some sort. The house is masonry stucco with a slab foundation/perimeter footing with a rear addition. A 0.5 in. wide crack has caused damage to the front living room floor. The tiles are loose in the vicinity of the crack, and...
Which is the preferred method of measuring shear strength in the lab – triaxial compression testing or small scale direct shear testing? Is the answer to this question at least partially application specific (irrespective of legal design requirements)?
Here is an excerpt from Holtz and Kovacs...
