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ASTM Selected Technical Papers
Dynamic Geotechnical Testing
By
ML Silver
ML Silver
1
University of Illinois
,
Chicago, Ill.
;
symposium cochairman
Search for other works by this author on:
D Tiedemann
D Tiedemann
2
Bureau of Reclamation
,
Denver, Colo.
;
symposium cochairman
Search for other works by this author on:
ISBN-10:
0-8031-0326-3
ISBN:
978-0-8031-0326-9
No. of Pages:
406
Publisher:
ASTM International
Publication date:
1978

Determination of dynamic shear modulus in situ has been an increasingly important source of data for ground response analysis for earthquake design studies. Historically, shear modulus is calculated from in situ measurement of seismic shear-wave velocity. A downhole impact energy source has been developed which maximizes the shear-wave energy produced and minimizes compressional-wave energy for purposes of crosshole in situ seismic shear-wave velocity measurements. The geometry of the energy source permits reversal of the polarity of shear-wave arrivals without changing the polarity of compressional-wave arrivals.

The energy source is described and in situ measurement data are presented. Based on more than three years experience using the downhole source, a procedure for in situ measurement of seismic shear-wave velocity is suggested.

1.
Seed
,
H.
and
Idriss
,
I. M.
, “
Soil Moduli and Damping Factors for Dynamic Response Analyses
,” Report EERC 70-10,
Earthquake Engineering Research Center, University of California
at Berkeley,
1970
.
2.
Hardin
,
B. O.
and
Drnevich
,
V. P.
,
Journal of the Soil Mechanics and Foundations Division
 0044-7994, American Society of Civil Engineers, Vol.
98
, No.
SM6
,
1972
, pp. 667–692.
3.
Mirafuente
,
N. T.
,
Zurflueh
,
E. G.
, and
Statton
,
C. T.
, “
Improved Shear-Wave Measurement Technique for Better Earthquake-Resistant Design
,”
Woodward-Clyde Consultants Geotechnical/Environmental Bulletin
, Vol.
7
, No.
2
,
1974
.
4.
Mooney
,
H. M.
,
Journal of the Geotechnical Engineering Division
 0093-6405, American Society of Civil Engineers,
08
1974
, pp. 905–923.
5.
Stokoe
,
K. H.
and
Woods
,
R. D.
,
Journal of the Soil Mechanics and Foundations Division
 0044-7994, American Society of Civil Engineers, Vol.
98
, No.
SM5
,
1972
, pp. 443–460.
6.
Ballard
,
R. F.
and
McLean
,
F. G.
, “
Seismic Field Methods for In Situ Moduli
,”
Soils and Pavements Laboratory, U.S. Army Engineer Waterways Experiment Station
,
Vicks-burg, Miss.
, Miscellaneous Paper, S-75-10,
1975
.
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