Verification of Seismic Cone Penetration Test Calibration Chamber Tests on a Sand

2021 ◽  
Vol 45 (2) ◽  
pp. 20210068
Author(s):  
Abouzar Sadrekarimi ◽  
Stephen Jones
Keyword(s):  
Cone Penetration Test ◽  
Penetration Test ◽  
Cone Penetration ◽  
Calibration Chamber ◽  
Seismic Cone Penetration Test

Seismic cone penetration test and seismic tomography in permafrost

2004 ◽  
Vol 41 (5) ◽  
pp. 796-813 ◽  
Author(s):  
Anne-Marie LeBlanc ◽  
Richard Fortier ◽  
Michel Allard ◽  
Calin Cosma ◽  
Sylvie Buteau
Keyword(s):  
Seismic Tomography ◽  
Dynamic Properties ◽  
Cone Penetration Test ◽  
The Body ◽  
Body Waves ◽  
Reconstruction Technique ◽  
Seismic Velocities ◽  
Penetration Test ◽  
Cone Penetration ◽  
Seismic Cone Penetration Test

Two high-resolution multi-offset vertical seismic profile (VSP) surveys were carried out in a permafrost mound near Umiujaq in northern Quebec, Canada, while performing seismic cone penetration tests (SCPT) to study the cryostratigraphy and assess the body waves velocities and the dynamic properties of warm permafrost. Penetrometer-mounted triaxial accelerometers were used as the VSP receivers, and a swept impact seismic technique (SIST) source generating both compressional and shear waves was moved near the surface following a cross configuration of 40 seismic shot-point locations surrounding each of the two SCPTs. The inversion of travel times based on a simultaneous iterative reconstruction technique (SIRT) provided tomographic images of the distribution of seismic velocities in permafrost. The Young's and shear moduli at low strains were then calculated from the seismic velocities and the permafrost density measured on core samples. The combination of multi-offset VSP survey, SCPT, SIST, and SIRT for tomographic imaging led to new insights in the dynamic properties of permafrost at temperatures close to 0 °C. The P- and S-wave velocities in permafrost vary from 2400 to 3200 m/s and from 900 to 1750 m/s, respectively, for a temperature range between –0.2 and –2.0 °C. The Young's modulus varies from 2.15 to 13.65 GPa, and the shear modulus varies from 1.00 to 4.75 GPa over the same range of temperature.Key words: permafrost, seismic cone penetration test, vertical seismic profiling, seismic tomography, dynamic properties.

Practical aspects of in situ measurements of material damping with the seismic cone penetration test

1993 ◽  
Vol 30 (2) ◽  
pp. 211-219 ◽  
Author(s):  
W. P. Stewart ◽  
R. G. Campanella
Keyword(s):  
Shear Wave ◽  
Cone Penetration Test ◽  
Material Damping ◽  
Penetration Test ◽  
Cone Penetration ◽  
Seismic Shear ◽  
Laboratory Results ◽  
Calculation Methodology ◽  
Seismic Cone Penetration Test

The downhole seismic cone penetration test (SCPT) procedure has been extended to allow the measurement of material damping at small strains at minimum expense while one is measuring shear wave velocity. The nature of damping, the required equipment characteristics, and the recommended procedure and calculation methodology are presented in a practical way. SCPT results from four different sites give results that are in general agreement with laboratory measurements of damping for sands and clays and with values recommended by other authors. It appears, however, that previously reported measurements of damping by borehole methods are higher, by a factor of two or more, when compared with SCPT and laboratory results. Key words : in situ, damping, seismic, shear wave, cone penetrometers, procedures.

Site characterization of reclaimed lands based on seismic cone penetration test

2021 ◽  
Vol 280 ◽  
pp. 105953
Author(s):  
Hao Wang ◽  
Shifan Wu ◽  
Xiaohui Qi ◽  
Jian Chu
Keyword(s):  
Cone Penetration Test ◽  
Site Characterization ◽  
Penetration Test ◽  
Cone Penetration ◽  
Seismic Cone Penetration Test

Cone penetration test calibration for Erksak (Beaufort Sea) sand

1987 ◽  
Vol 24 (4) ◽  
pp. 601-610 ◽  
Author(s):  
K. Been ◽  
B. E. Lingnau ◽  
J. H. A. Crooks ◽  
B. Leach
Keyword(s):  
Beaufort Sea ◽  
Cone Penetration Test ◽  
Horizontal Stress ◽  
Sand Sample ◽  
Cone Penetrometer ◽  
Calibration Data ◽  
Penetration Test ◽  
Cone Penetration ◽  
Fines Content ◽  
Calibration Chamber

Interpretation of the cone penetration test in sands is generally based on empirical calibrations from tests in large-diameter calibration chambers. Although interpretation of these calibration data for clean sands in terms of the state parameter is expected to be broadly applicable to other sands, material-specific correlations are desirable for many projects. This paper describes a series of calibration chamber tests carried out on a sand dredged from the Beaufort Sea for construction of artificial islands. This Erksak sand is a uniformly graded, subrounded medium-grained sand with a fines content of 3–6%. The testing chamber described is 1.4 m in diameter, and allows independent control of vertical, horizontal, and back pressures on the sand sample. Samples of the sand were prepared by moist compaction to preserve the fines content, and then back pressure saturated.The chamber test data are presented and confirm that the Erksak sand fits the general trends observed for other sands very well. A method is also described that allows the interpretation to be consistent, even in the event that nonuniform void ratios occur in the samples. Measurements of horizontal stress behind the cone tip, which is a new development in cone penetrometer testing, are also presented. Key words: cone penetrometer, sands, in situ tests, state, calibration chamber, horizontal stress measurement.

scholarly journals On the interpretation of seismic cone penetration test (SCPT) results

2013 ◽  
Vol 35 (4) ◽  
pp. 3-11 ◽  
Author(s):  
Irena Bagińska ◽  
Wojciech Janecki ◽  
Maciej Sobótka
Keyword(s):  
Test Performance ◽  
Ground Surface ◽  
Small Strain ◽  
Cone Penetration Test ◽  
Penetration Test ◽  
Cone Penetration ◽  
Soil Medium ◽  
Small Strain Shear Modulus ◽  
Different Depths ◽  
Seismic Cone Penetration Test

Abstract The paper deals with the methodology of performing and interpretation of seismic cone penetration test (SCPT). This type of test is used to determine velocity of the seismic wave in the soil medium. This study is focused on shear wave. The wave is triggered on the ground surface by hitting an anvil with a sledgehammer. Then, vibrations induced at different depths are measured. Based on recorded measurements wave velocity (Vs) and thus also small strain shear modulus Gmax may be calculated. An interpretation of exemplary seismic test results is presented. Crossover and cross-correlation methods are discussed and another, more adequate one is featured and then applied in the interpretation example. Conditions for correct test performance and interpretation are discussed.

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