We can calculate the active (ka) wedge distance and passive (kp)mwedge distance behind/in front of a wall.
is there such thing as an "at-rest" (ko) wedge and if so, how do i calculate it?
i was just wondering what the difference is between the following analysis methods used to calculate the CSR for a liquefaction analysis in a site response analysis:
1. linear total stress (SHAKE?)
2. non-linear total stress
3. non-linear effective stress
what does the "linear" thing mean...
Hi guys,
just out of curiosity, just wondering what everyone in the US and Canada are using for piled wall basement design?
By this i mean bored reinforced concrete piles spaced at generally less than 3D centres e.g. 600 mm diameter piles at 1800 mm centres? and temporary props (raking...
i am doing a newmark sliding block analysis ("Jibson 2007") for a slope to estimate the lateral displacement under seismic conditions. To do this, i need to determine the yield acceleration. This is usually done by tweaking the acceleration coefficient in Slope/W until the FoS is 1.0. i have...
In slope stability analyses, we generally use drained parameters (c', phi) for long term assessment of slopes and undrained parameters (Su) for short term assessment.
After how many days/weeks/months/years does a material go to a "drained" conditions.
let's assume for this question that we...
I have a nested piezometer that is screened between 5-6 m ("shallow") and 10-11 m ("deep")
The water level is measured at 3.2 m in the shallow piezo and 3.4 m in the deep piezo.
The soil is silty clay down to 20 m.
Does this suggest that we have a hydrostatic porewater pressure profile...
Can anyone explain in PLAIN ENGLISH what critical soil state mechanics is?
Every lecture/talk I have been to on it has been taken by an academic that was not good at explaining it to real world practitioners!!
cheers
Doug Hole
Junior Geotechnical Engineer
I have a few questions on soil nails and anchors...
1. when are soil nails used instead of anchors?
2. apart from the free stress length on an anchor, what is the difference between a soil nail and soil anchor?
3. for modelling an anchor in a slope reinforcement application, we would usually...
Hi everyone,
What is the difference between solid density, bulk density and maximum dry density?
Some specs require compaction to 80% of solid density. The US seem to like to require 95-100% of the maximum dry density in a compaction spec.
Not sure how/what the solid density compares to this...
What is the difference between mv for settlement calcs and the Cc/1+e0 & Cr/1+e0 method? Is mv used for normally consolidated soils and the latter used when there has been some OCR effects and a preconol pressure? Any clarifications would be great
When geotechnical and structural engineers talk about "Soil springs", what do they mean in the context of lateral pile analyses? is this just a p-y curve? or is it just subgrade modulus (k) or is something else. How do I come up with "soil springs"? Can I do this in LPILE and if so, how?
Hi,
Can someone let me know if they know how to import a file i.e. a sketched section and then draw over the top of it to create a section in Slope/W. I have inserted the image(Bitmap file) but am having trouble scaling it.
Doug
