Search results for query: *

Thanks for the reply. We do plan to do this. I'm anticipating that our machines will be within the tolerance, but nevertheless, my concern is not meeting the ASTM spec. We've had requests for specifically hydraulic-controlled loading. Wondering if you've encountered this.

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...

Most of us geotechs know the hardware, know what it does, and understand how it works, but don't understand the mechanical engineering that goes into the hardware. You might have better luck posting this kind of question to mechanical or materials science engineers.

Can you post a cross section that shows the geology, the quarry, and the planned excavation?

What are you trying to measure?

Clarification of my statement regarding the Hoek-Brown criterion - this is a method of rock mass shear strength estimation with rock mass being defined as whole rock inclusive of joints and intact rock. The "rock mass" concept is used to downgrade the shear strength from intact rock free of...

The majority of my practice is in rock slopes and I feel that the tone of this thread is far off track. The issue at hand should be "What kind of failure modes should I expect?" rather than "What kind of software should I be using?". To ask the latter first is putting the cart before the...

killswitchengage- regardless of your opinion, the tone of your response is totally out of line. Professionals come to this site for help, not to be belittled.

Here is the book you need to read: https://www.rocscience.com/hoek/corner/Support_of_Underground_Excavations_in_Hard_Rock.pdf and it's free. You are correct in that the span and the size of the beam or wedge dictate the ground support needs. The geotechnical design starts with of course, a...

It would be incorrect to use RMR or Q on concrete blend products. The "mass" strength has no applicability here. Rock mass strength is an intermediate strength between that of discontinuities and intact rock. Using the Hoek-Brown method, this strength is estimated using GSI (or RMR) as one of...

Casing deflection is measured relative to the baseline or post installation reading, so even if you're not quite vertical, you'll still pick up the movement.

I've seen the phenomenon you're describing many times, but in very deep installations (>1000'). A significant difference in readings would indicate either a perched aquifer or a hydraulic gradient. I would say that your data indicates more or less hydrostatic conditions for the purpose of your...

That is simple. Nice and easy. Thanks

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...

One person I showed the picture to thought it could be a stamp mill designed for crushing rock. However, I was skeptical. The steam engine idea makes more sense considering the size, the belt drives, and the ports. I love the old mining history. It's very interesting. The folks that live...

This is the only picture I have. A colleague passed it on to me.

Does anyone know what this machine is and how it works? The photo was taken near an old silver mine in Mexico.

I don't know the NYS requirements or if there even is such a thing, but would like to know the rock gradation requirements you mentioned. Can you post these riprap requirements (Dmin, D50, Dmax) and the source? Thanks!