Seismic Cone Penetration Test Assessment of Vibratory Probe Compaction for Liquefaction Mitigation

2012 ◽  
Author(s):  
Yuan Cheng ◽  
Songyu Liu ◽  
Zhibin Liu ◽  
Guojun Cai
Keyword(s):  
Cone Penetration Test ◽  
Penetration Test ◽  
Cone Penetration ◽  
Liquefaction Mitigation ◽  
Test Assessment ◽  
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

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.

scholarly journals Relationship between Shear Velocities Recorded by Microtremor Observations and Seismic Cone Penetration Test Results

2021 ◽  
Vol 6 (2) ◽  
pp. 315-336
Author(s):  
Rusnardi Rahmat Putra ◽  
J. Kiyono ◽  
Sai K. Vanapalli ◽  
Y. Ono
Keyword(s):  
Soft Soil ◽  
Cone Penetration Test ◽  
Numerical Approach ◽  
Engineering Practice ◽  
Test Results ◽  
Test Unit ◽  
Penetration Test ◽  
Cone Penetration ◽  
Seismic Cone Penetration Test ◽  
Observation Results

This research proposes a relationship between two methods such as a numerical approach by conducting a microtremor array observation and field survey by using the seismic cone penetration test unit (SCPTu). A database of shear-wave velocity (Vs) measurements was established using the microtremor array technique and seismic cone penetration test unit (SCPTu) on high-quality samples of rock and soft soil in Padang city, Indonesia. The study also demonstrates that the Vs values obtained from the different methods are consistent with the microtremor array technique. This technique may thus be deemed a valuable tool, as it can be used in engineering practice with confidence. Comparison of the Vs for different soils at the first layer between the microtremor array observation results and the SCPTu results exhibited the microtremor array method is unable to determine the Vs  at the layer where its Vs changes dramatically, such as at the same layer as station UNP at 2 to 3.5m deep.

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