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`i <br /> I <br /> Am <br /> J0 40 <br /> I State of California <br /> Department of Transportation <br /> Division of Construction <br /> Transportation Laboratory <br /> i <br /> DESIGN CHART FOR THICKNESS OF LAYERS OF PAVEMENT STRUCTURE � <br /> F <br /> " <br /> PROCEDURE FOR USE OF CHART 100 = 0.0 <br /> The chart solves the foltoainq <br /> formula_ 0.0032(Til 000—R) <br /> I Gt <br /> � s <br /> i • J <br /> With o stroightcdge 14rough <br /> scale E of the Rwalue (R)of the soil •0 a c <br /> tested and Scale F at the design Traffic a •`} <br /> Inde: (Tll,intersect Scale G. Scale G is a , <br /> 'turning point on the nomograph and sa w a pP W 1 <br /> indicales the 'sicknesses of gravel 70 <br /> :cover neari:d to sustain the design T,1. .•.�.w <br /> + Q o <br /> ;with the cohesion or slab value of the <br /> pavement negleckd From that point on as 4 a y r <br /> S�a4a G,inicrsccl Scale H at iht connWreed s <br /> 'gravel equivalent factor of the layers <br /> 'above the material in question. The a x W en • co W <br /> intersection with Scale I determinesu tp A`° <br /> the required thickness (T) corrected i R o q Q <br /> for the slob value of the upper w ° to u r a i 1 <br /> layers of cover material needed to N „ .•v w ' `,N <br /> ;prevent plastic deformation of the +Ow <br /> . $oil lasted. 2 a TJ'C y ti 4 <br /> A f a <br /> � I � •OT — " u .a 4r <br /> {� Y <br /> } <br /> EXAMPLE 30 �\ : X •Y� <br /> Givenr r%u <br /> I R—value of a soil•31 <br /> TI +8.0 i0 " F. h <br /> Gf=1.5 r � Q0 n <br /> s <br /> Thickness of cover (T) = 1.20* \ ' • n <br /> —40 <br /> a° <br /> r <br /> } <br /> FIGURE 19 's � <br /> i e <br /> I <br /> ' a <br /> ' <br /> i <br /> i <br /> i <br /> I <br /> r <br />