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<br />~V r. r t ,l 1, .ili_. _...:ir U~.~, ,. ~r.~l
<br />~J
<br />
<br />?=':e': e.^,: .::'_:._.1. __ ".... ...:-vG._.T.]:Cad: is
<br />f .:_-.... -~:e-_-~.
<br />_} ~ pr;er..cras, arc
<br />
<br />T"c_: c...,euc^ve:3 t`edesigtt ofie•+~-voi:::ne racds:or
<br />these three Suraec tp-ycs using procdures bzscd un
<br />daic_.~ ears (nomom_pis) and dcsic~t ntaiogs. T.:ese
<br />rx~o pror_dures ara eaccrcd i-. Se^:ons a, i and ».=,
<br />ccicdc. For suzfa~ t:cat;rcat cr c`ip seal pavc-
<br />ca_: s:r.:c^ur_s. •Weprcti- Jures for ticxib!. pavamca¢
<br />>>-: be use
<br />.~.•^~^•^'1 Dr^~^^: ba5'S :aT _..:a:0 _, ;. 71N W=-:
<br />...e ,r"d .r`L71..::::' ~. i55 ~~~~~T :II t:_:. J1G~:J
<br />d e;..:. a~nTCaL. taT iaG-vJlu~e :w...,. r:`_: eLS ~,
<br />_cu.~wt__u *fit!-^.•ei'sar~:.attcd_.-__....cs
<br />ocnve_n as:cwoblcs ~c tna~s.
<br />°_inc~ many rt}• s:r_cs and ca::~:c roads t~ac :a'1
<br />under the low-volume cte2erv cav still r-: si~nia-
<br />cant le':eis of trucz ;rf:;q the maF.imum numbc: of
<br />18-iip SAL aoolic.uons eansde,-cd for exiole and
<br />rgid pavement desi+II :s 700,000 to 1 cii'icn. The
<br />pr~~el minimum t~frc !evei that r_n be cersidered
<br />for any tlexible or ricd paves cn; during a given
<br />per.'orrvaacc period is about 50,000 IS-kip ES.-,L
<br />a?p!ictuotts. Far the a2crgate-sur,'accd (glnc-_!) roods
<br />used for many county ari forest roads, t::e maximum
<br />tr.S%c icvciconsiderd is .:0,000 i8-i:ip ES.-~L applica-
<br />tions, while the praccr_1 minimur.. lerel (doing a
<br />sirgic pcrormancc period) is l0,Gv0.
<br />:.i DE_IG\ CH.= RT PROCLDL"RES
<br />:.!.l :~_ :iblt end F:ipid Parcmen[s
<br />R'.,L.:~C ^.::^ti IJC'.i:J~ C.. to L:1,17: J.' -) 1i OCi 1i f::;;
<br />basiestt~-bt•-;u. ,;r;::e~ure5 drebcd in •~. - _:'_
<br />The --r-ar; diffc:cncc i : ! :e dcsi;n Coc:ow-'cit:mo
<br />roc: is :.,e !c•;ei of ~7!taJ;liR' :h1[ ^aV DC used.
<br />,-~ _I,
<br />vcc__.._.:~tr.cir.c!a.,.~ .,v ucc2c a,r.d tc.. ,.>so-:.'~:cd
<br />o.: it'r' of ri;. t.._ ._.ei ei reiiabiii:v ...am-ended
<br />CJr Ic'~:-voiur..c rood coign is 50 ~^ccai. inc tser
<br />n-! , ;:ovc•:... dr ;a ..., _ c:._.es c;- bJ to SO
<br />p- _.nt. -_- r.dir:, c ; : ~: acid ; rc e^:-:! .,.vei of
<br />::ofScan~thcieas;~:iin•,cfTe:abilitatien-~ por-~ca
<br />of car..d~r, etc.
<br />If, inesti ~_rngar.effe^ivernsiEca:medu;usoftae
<br />roacccd matc:-iai (`.it,) or an r.;fc,--ive ~oduhu of
<br />subgrcde rcac;ic^ (k), is is not nossibL- :o dttc:-mirc
<br />tiro ien~ hs of the.easo;s ar evr tttcscasen_i rc~dbcd
<br />SOIL C ~':L:CnI III::-0Ult, :hC IO110Mn$ StiE4~JAn5 TOIY ~
<br />~:e",.%Lerrz; ____ _ -c 4.i;:caid:a~~tautne
<br />;it C'_._..-., :.-~..--' i'7^..3.:1'.^.=::L^~'_L3:~3.C.'.
<br />_.. 1C'~ tCl ....: R. Che 'C?: (;.. ._ _.SS .__.. _.. fJr
<br />Ce;e.^.':=.~~VSC :'::G~'IIVC: Oat1 L~'.'7 SOlI PS_:1 ~'3'.G :!i!L'S
<br />i :~cC.-~,. _.~ :} Jr !:C xahe paVe...^.:L dC::Ti Jr iuG
<br />Cl:e~_+t'e -00211 t:5 OI °t16 ~1 `': r _'CCC;On {>C'10II ~.^_:)
<br />for r,d ;,aveWent dcsi 1 .
<br />:;rzo.-clRoadbedSoilRuditrt3fodtli Tabie4?
<br />provides roadbed seil resiIIer_t modulus szlues t;tat
<br />eta, bcuccdCorlow-volnmeroaddcsi~it~Wcwcr ua
<br />c!assc•: the ocnera! euality of tl:e roadbed enteral as a
<br />Coundatiaaiorthepacementstr ctu:c.Ifc!:esngga;ed
<br />values in this cable ace eembincd with t`.c sue°cs;ed
<br />season Icr¢ths identified in the prLio2u section,
<br />eifccrive roadbed soil resilient modulus Lalucs {for
<br />(lesible pavement design only) can be gcacra:cd fer
<br />r_ch of the six U.5. dimatic:e_tians. Those A1R values
<br />arc prescnxd in Table ».3.
<br />:.:., .4,,, Este-Suriaccd Fonds
<br />i :-._ . s:. (:,r trc_:i:;c [cc r. rots v: $[1`_^C]! f^Jt.[7
<br />C'~a11'_. '. ...:l`:::: : C:: .0:: (l Sa!tr.: (:: L`a^ICi. ~ ~ :i f~.':
<br /> __.. . ..
<br />
<br />.~':.__.. . .::1._.. .. ._ .. .:: ~'.. 4._. ..L.'. ..._...:.'_r '..'..:: .'
<br />
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