ML21272A009
| ML21272A009 | |
| Person / Time | |
|---|---|
| Issue date: | 01/29/2020 |
| From: | Scott Stovall Office of Nuclear Regulatory Research |
| To: | |
| S. Stovall | |
| Shared Package | |
| ML21272A001 | List: |
| References | |
| Download: ML21272A009 (13) | |
Text
Garner Valley Downhole Array (GVDA)
By Scott Stovall USNRC 1
Garner Valley Downhole Array Geotechnical Data
- Near-surface stratigraphy consists of 18-25 m of lake-bed sediments consisting of alternating layers of sand, silty sand, clayey sand, and silty gravel.
- Decomposed granite classified as gravely sand exists between 25m and 88 m until granite bedrock is reached From Steller 1996
Shear Modulus and Damping From Stokoe and Darendeli 1998
Downhole Array From Steidl et al. 2010
Borehole Velocity Measurements Downhole, Gibbs 1989 PS Logging, Steller 1996 Shear Wave Velocity (m/sec) Shear Wave Velocity (m/sec) 0 500 1000 1500 2000 0 500 1000 1500 2000 0 0 10 10 20 20 30 30 40 40 Depth (m) Depth (m) 50 50 60 60 70 70 80 80 90 90 100 100
SASW SASW, Stokoe et al. 2004 Shear Wave Velocity (m/sec) 0 200 400 600 800 0
Line 1 5
Line 2 Lines 3, 4 and 5 10 Depth (m) 15 20 25 30
Velocity Profiles Shear Wave Velocity (m/sec) 0 500 1000 1500 2000 0
SASW Line 1 10 SASW Line 2 20 SASW Lines 3, 4 and 5 PS Logging 30 Downhole 40 Depth (m) 50 60 70 80 90 100
MASW and MAM Arrays From Teague et al. 2018
Microtremor Array Measurement From Teague et al. 2018
Inverted Profiles From Teague et al. 2018
Recorded Strong Ground Motions R < 25 km R < 50 Km R < 100 km R < 200 km 8729 750 8729 750 8729 518 7877 231 167 Events 180 45 2 R < 200 km 9 0 48 R < 100 km 5 0 R < 50 Km 10 1 0 R < 25 km 1.5-2.5 2.5 -3.5 3.5 - 4.5 4.5 - 5.5 5.5 -6.5 Magnitude
References
- J.F. Gibbs, "Near-surface P- and S-wave velocities from borehole measurements near Lake Hemet, California," U.S. Geological Survey Open File Report; 1989
- Steller, R (1996). New Borehole Geophysical Results at GVDA
- Steidl, J.H, Seal S.W, and Civilini F (2010) Observations and Analysis of Ground Motion and Pore Pressure at the NEES Instrumented Geotechnical Field Sites, Poster, http://nees.ucsb.edu/facilities/GVDA
- Stokoe, K. H., and M. B. Darendeli (1998). Laboratory evaluation of the dynamic properties of intact soil specimens, Garner Valley, California, Institute for Crustal Studies Internal Report
- Stokoe KH, Kutulus A, Menq FY. SASW measurements at the NEES Garner Valley test site, California. University of Texas at Austin, College of Engineering Data Report; 2004.
- David P. Teaguea, Brady R. Cox, Ellen M. Rathje (2018), Measured vs. predicted site response at the Garner Valley Downhole Array considering shear wave velocity uncertainty from borehole and surface wave methods, Soil Dynamics and Earthquake Engineering, 113 p 339-355