HomeMy WebLinkAboutSUB201500112 Plan - Other (not approved) 2015-09-11VDOT - 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
l_ C M AJZ LE
Date: q Z O I S
Subdivision
UNt -onZW V
Street Name
�L, oA ci A
Design Engineer
ti / 1 f orC Phone: '1? `f • 3 7.1 - I C91-1 o
AADT Projected traffic for the street segment considered, as defined in the Subdivision Street Requirements.
CBRo 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 = CBRp 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 I1.
Step 1: Determine Design AADT
Step 2: Determine Design Values
CBR, RF, and SSV
AADT
Sample No.
CBRT Resiliency Factor (RF)
%HCV = 100 ( HCV / AADT)
or
EPT = 20 x HCV
Note: For %HCV < 5 %, use AADT
Note: For
%HCV >5 %,
EP"I>AADT�
1
Source
Value
2
Table 1
3
Appendix I
r
DME approved RF
For preliminary designs, use the lowest
J X Z1 _ Z (o "� RF value in the equation
CBR, x RF = SSV
Design AADT
Use greater of AADT or EPT
200 AO T
Step 3: Pavement Design (Check appropriate box and show proposed pavement design below.)
O (A) Limited to Design AADT 400 - Show pavement material notations and thickness from Appendix IV Tables A and B.
• _ (B) Show pavement section as developed in the Pavement Design Guide.
(See Appendix III for material notations and thickness equivalency values (a)).
DR = d
from Appendix II
Description of Proposed Pavement Section
Material Notation
Thickness, h
a
(a x h)
Surface
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Base
3M — ZS,O
kb-7
q, /-15
Subbase
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5 I N
®, lO
Dp must equal or exceed the value of DR.
Dp = E(a x h) = � S
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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
l.j,� e /v1 ftR 1, C:
Date: /9 /Z O / S•
Subdivision
�� �.of L_ A V
Street Name
P F
Design Engineer
+_ L /A/7- �y j ��C E7T
Phone: 9?C-/ Z '% (p G d
AADT Projected traffic for the street segment considered, as defined in the Subdivision Street Requirements.
CBR, 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 = CBRo 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 Apperidix II.
Step 1• Determine Design AADT
Step 2: Determine Design Values
CBR, RF, and SSV
AADT
Sample No.
CBRT
Resiliency Factor (RF)
%HCV = 100 ( HCV / AADT)
or
EPT = 20 x HCV
Note: For %HCV < 5 %, use AADT
—
1
Source
Value
2
Table 1
Note: For
%HCV >5 %,
EPT'>AADT
3
Appendix I
DME ap roved RF
r�
For preliminary designs, use the lowest
X 2 3 2 RF value in the equation
CBR, x RF = SSV
Z( ,b 7) x t I _ 2-, (o-7
Design AADT
Use greater of AADT or EPT
� � O
Step 3: Pavement Design (Check appropriate box and show proposed pavement design below.)
• (A) Limited to Design AADT < 400 - Show pavement material notations and thickness from Appendix IV Tables A and B.
• (B) Show pavement section as developed in the Pavement Design Guide.
(See Appendix III for material notations and thickness equivalency values (a)).
DR = -1.9
from Appendix II
Description of Proposed Pavement Section
Material Notation
Thickness, h
a
(a x h)
Surface
M_ 9,o A
ho o
1. b-7
1, (o -7
Base
� _ ZS ..®HOC
In
1, 0
y, 1,`-75
Subbase
//
l N71� !~ �f D GGrLECrf1'i�
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2. `T
Dp must equal or exceed the value of DR.
Dp = E(a x h) = g, 2q5
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