Subject: Foundation Soil Characteristics
by Surface Wave Sounding
Can you recommend
references to the use of a surface wave sounding to provide a shear wave
velocity model of the upper 100 feet of a site? The soil parameters to
be evaluated in this way are ultimate and allowable bearing pressures;
elasto-plastic spring constants for shallow spread footings; and elastic and
Are the results of
this kind of evaluation likely to be about the same as the results of a more
conventional soils investigation?
Do you monitor all lists or are we the only ones you bless with your years of
experience. This thread is about Structural Engineers monitoring cracks
over time (read weeks to years). I would not count on wet paper to stay
in position for more then a few hours.
message dated 12/1/2005 12:59:39 P.M. Atlantic Standard Time,
stretches. It also does not tear suddenly. Glass microscope slides makes a
better telltale as it is brittle and has little elongation, however,
uneven surfaces make adhesion difficult. Both will only show enlarging of
a crack, not closure, and the paper will be restricted to planar movement.
Across uneven surfaces it will be wavy/creased which will allow additional
movement before tearing. Additionally, it will not stick effectively
unless the surfaces are very clean. The same problem (regarding surface
cleanliness) occurs with epoxy. At a collapse site theodolites are
preferred as they also allow remote monitoring. While in the collapsed
building falling dust and noise make an excellent
You are wrong.
That is the way rescuers whose lives are at stake, have ACTUALLY
been doing it , from many countries, for many years. It sticks easy and wet
paper tears at the slightest movement of any kind.