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1`ii�� � ' �` ' � <br /> � ' ' { � ;� (�.I�7I.L DESIGN <br /> ::�� � . � _ _ . _ _ , <br /> ,a � ti_ � ��, � t� <br /> > > <br /> PROJECT: 3315 GRAHAM HILL ROAD PROJECT NO: 11-110 SHI:F,T: 1 OF 3 <br /> NO BACK SLOPE, 150 PSF MAXIMUM LIVE LOAD <br /> LOCATION: ORONO, MINNESOTA BY: TPH DATE: 7/22/2011 <br /> A.GE�ERAL DESIG\DATA <br /> Boulder.p= 140 pcf <br /> Wall Batter,i= 15.0 degrees <br /> Design Height,H= 8.0 ft(design height+embedment) <br /> Backslope,(3= 0.0 degrees <br /> Surcharge,q= 150.0 psf <br /> FS Sliding> 1.5 <br /> FS Overturning> 1.5 <br /> Bearing> 2.0 <br /> B.SOIL PARA�IETERS <br /> cb(deg) c(ps� y(pc� <br /> Retained Soil 26 0 120 <br /> Foundation Soil 26 0 120 <br /> C.GEOVIETRIC PARA3IETERS <br /> cb= 26 degrees <br /> a= 105 degrees(90°+i) <br /> �3= 0.0 degrees <br /> S= 17.3 degrees(2/3*�) <br /> D.COL'LO�iB EARTH PRESSURE CALCULATIONS <br /> ka= 0.25 s in'(a +�) <br /> � �� 2 <br /> Pa= 0.5 H k �� ) ��_�) � <br /> Pa= 966 a lbs/ft sinZa •sin(a —S) �+ sin +S sin <br /> sin(a —6)sin(a +Q) <br /> Pq= qHka <br /> Pq= 302 Ibs/ft <br /> E.EXTER\AL STABILITY � <br /> 1.OVERTURNING <br /> Overturning Moment <br /> Wn,1 8/�`lER . <br /> Mo= Pa(H/3)+Pq(H/2) ^'� � <br /> Mo= 3784 ft lbs <br /> Resisting Moment ,-- <br /> H=Design Height(ft) � <br /> D=Depth of Boulder(ft) � <br /> L=Distance from overturning __l_._ _..�__ __. <br /> point to centroid(ft) � <br /> ...__........__y.__.._..._"_� <br /> Figure 1�External 5tabiliry Diagram <br /> 8609 Lyndale Avenue S, Suite Z00� Bloomington,MN 55420 <br /> Office: 612-284-3696 <br /> Website:www.cdp-us.com <br />