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... <br />DOWNSLOPE DIKE WIDTH <br />. If landslope is 3% or more, subtract rock layer width from <br />adsorption width to obtain minimum downslope dike toe <br />I ~ ft -/ Q ft = ~-ft <br />· Calculate mound height at edge of rock layer on downslope <br />side; <br />a. Determine depth of clean sand fill at upslope edge of rock <br />layer: Separation J. 0 feet <br />b. Multiply rock layer width by landslope to determine drop <br />in elevation; Slope Difference <br />LQ_x '< %+100= ,3 ft <br />c. Add depth of clean sand depth of clean sand for <br />separation at downslope edge to depth of rock layer to <br />depth of soil backfill to get mound height at downslope <br />edge of rock layer; <br />~ ft of:'. ...l:..Q_ ft + d_ ft+ ,.s--ft = ...3t1_ ft <br />d. Enter table on page E-18 with landslope and downslope <br />dike ratio. Select dike multiplier of Y • $4 <br />e. Multiply dike multiplier by downslope mound height <br />to get downs~ope dike width: ~ x ;3 ,:-?? = ~ ft <br />g. Compare the values of step G.1 and Step G.2.f. Select the <br />greater of the two values as the downslope dike width; <br />J ~ feet <br />h. Calculate upslope dike width using upslope mound <br />height and upslope dike multiplier from page E-18; <br />~ x 3 ,5'? = I I ft <br />i. Total mound width is the sum of upslope dike width plus <br />rock layer width plus downslope dike width; <br />LL __ ft + __}_Q_ ft + -1..L. ft = _3k ft <br />3. If landslope is 2.9 percent or less, basal width includes both the <br />upslope and downslope dike widths. <br />a. Calculate downslope dike width using steps G.2.a. <br />through G.2.f; __ feet <br />b. Calculate upslope dike width using upslope mound <br />height and dike multiplier from Page E-18; <br />_· _x __ ft= __ ft <br />c. Add downslope dike width to upslope dike width to rock <br />layer width <br />__ ft+ __ ft+_ft= _ft <br />E-18 . - <br />lJownslope . ,· Upslope <br />3:1 u 5:1 6:1 7:1 3:1 4:1 5:1 <br />11.lllope <br />0 3.0 4.0 5.0 6.0 7.0 3.0 4.0 5.0 <br />I 3.09 U7 5.26 6.38 7.53 2.91 us 4.16 <br />2 3.19 4.35 5.5(, 6.82 8.1' 2Jl3 3.70 4M. <br />3 3JO 4.54 5.81 732 U6 2.75 3s, 4.35 <br />4 3.41 4.76 6.25 7111 9.72" -·· :ua -----us -U7 <br />5 353 5.00 6GI IS, 10.77 2.61 3.33 4.00 <br />6 3.66 5.26 7.14 9.38 lW 2.54 3.23 3.15 <br />7 uo 5.5(, 7M 1034 13.73 2.A8 3.12 3.70 <br />8 3.9S 5.88 8.33 11.54 15.91 2.42 3,m 3Sl <br />9 4.11 6.25 9.0!1 13.1)4 18.92 2.36 2.94• us <br />10 4.29 6G/ l0JJ 15.00 23.33 2.31 2.8(, 3.33 <br />11 UI 7.14 11.11 17.65 30.43 2.26 2.78 3.23 <br />12 4.69 7/A 1:Z.SO 21.43 43.7S 2.21 2.70 3.12 --- <br />e:-20 <br />Rock layer width (d2) <br />u~ I~., <br />6:1 7:1 1:1 <br />6.0 11) 81) <br />5.66 6.54 7.41 <br />5.36 6.14 6.90 <br />S.OI 5.79 6.45 <br />4M 5.A6 (,1)6 <br />4.62 5.19 S.71 <br />Ul 4.93 5.41. <br />423 ,.10 5.13 <br />4.a; U9 4.88 <br />3.90 4.30 us <br />3.75 4.ll 4M <br />3.61 3.95 4.26 <br />3.49 3.80 4./)8 <br />""'~·-··~-·--·-I: ' _=::f __ ,