HomeMy WebLinkAboutSUB201600066 Study Road Plan and Comps. 2016-03-25 %re NIS
VDOT—Pavement Design Guide for Subdivision and Secondary Roads in Virginia(revised 2014)
Appendix IV
Flexible Pavement Design Worksheet for New Subdivision Streets
This sheet is intended for use and submission in conjunction with VDOT's Secondary Street Acceptance Requirements
County A $EM142C E Date: 3/25/zoi(o
Subdivision \jDc oL".N N Sug DI V I16n1
Street Name J et.OLAVV P J --L.7
Design Engineer T S ,cs0.GETT^TM4torJ3 (JRau o Phone: 0-1%2 L/33-1
AADT Projected traffic for the street segment considered,as defined in the Subdivision Street Requirements.
CBRD Design CBR=Average of CBRT x 2/3 and modified only as discussed in the Pavement Design Guide.
CBRT CBR value of the subgrade sample,taken and tested as specified in the Pavement Design Guide
DME VDOT District Materials Engineer
EPT Equivalent projected traffic
HCV Number of Heavy Commercial Vehicles(e.g.trucks,buses,etc.,with 2 or more axles and 6 or more tires).
%HCV Percentage of the total traffic volume composed of Heavy Commercial Vehicles.
RF Resiliency Factor=Relative value of the subgrade soil's ability to withstand repeated loading.
SSV Soil support value of subgrade(SSV=CBRD x RF)
Dp Thickness index of proposed pavement design computed by the Conventional Pavement Design Method
DR Thickness index required,based on Design AADT and SSV,determined by Appendix II.
Step 1• Determine Design AADT Step 2: Determine Design Values
• CBR, RF,and SSV
AADT Sample No. CBRT Resiliency Factor (RF)
1 Source Value
%HCV= 100(HCV/AADT) 2 Table 1
or
EPT=20 x HCV Note:For 3 Appendix I
Note:For%HCV<5%,use AADT %HCV>5%, 9 DME approved RF
EPT>AADT /�
GII RD For preliminary designs,use the lowest
4 x j zh) Z.(p') RF value in the equation
Design AADT QQ CBRD x RF = SSV
Use greater of AADT or EPT 8
(2.(o1 ) x ( I ) = Z• )
Step 3:Pavement Design (Check appropriate box and show proposed pavement design below.)
0 (A) Limited to Design AADT<400-Show pavement material notations and thickness from Appendix IV Tables A and B.
-- --------------------------- ----------------------------------------------------------------
DB) Show pavement section as developed in the Pavement Design Guide. DR 1.0
(See Appendix III for material notations and thickness equivalency values(a)). from Appendix II
Description of Proposed Pavement Section
Material Notation Thickness,h a (a x h)
Surface SM _ C.i.Ott 1 'NJ l•b1 ( • (o- 1
Base �M — ZS.O A 2.S Ir..1 1.61 4. 11S
1'1S
Subbase Uw-E wTE D l6•(K.,2C Csft rE- Lt 1,4 O.b 2..4
Di, must equal or exceed the value of DR. Dp=E(a x h)= g ,.Z4st�
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