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REP10403
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Last modified
8/24/2016 11:39:52 PM
Creation date
11/27/2007 12:24:59 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981033
IBM Index Class Name
Report
Doc Date
11/19/1981
Doc Name
1981 SLOPE STABILITY ANALYSIS WEST PORTAL AREA
From
ROCKY MOUNTAIN GEOTECHNICAL
Permit Index Doc Type
SUBSIDENCE REPORT
Media Type
D
Archive
No
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l the Atterberg Limits, ASTM D-423, were performed for each representa- <br />J tive soil type in order to permit determination of index properties <br />' and the Unified Soil Classification. <br />For proper analysis of the stability conditions on site, shear <br />strength information was required for the materials exposed in the <br />high wall cut, and which also formed the foundation soil fcr the area <br />1 to be evaluated. Additional shear strength information was also re- <br />I quired for the existing ber+ch fill materials, both in their existing <br />condition of low density, and in a high density, compacted condition. <br />1 A detailed graphical representation of shear strength results will be <br />found in the Appendix of this report. However, this information may <br />I be summarized as follows: <br />Materials exposed in high wall cut and foundation materials: <br />p (total stress) = 72 degrees <br />l C = 216 psf <br />~ = 113 pcf <br />I Peak ~ (effective stress) = 33.7 degrees <br />C = 173 psf <br />2S = 101 pcf <br />I Residual ~ = 16.7 degrees <br />C = 0 psf <br />I ZS' = 101 pcf <br />1 Existin4 Bench Fill Materials: <br />Peak ~ = 90.2 degrees <br />l C = 0 psf <br />D" = 109.9 pcf <br />I Residual d = 30 degrees <br />C = 0 psf <br />.. 7l = 109.9 pcf <br />-4- <br />
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