HomeMy WebLinkAboutCT 05-10; POINSETTIA PROPERTIES THE TIDES; ASPHALTIC CONCRETE PAVEMENT DESIGN; 2011-07-199PR0\JELE
FL
Earth Stra ta,. I/n C,.
Geotechnlcal, Environmental and Materials Testing Consultants
BETTER PEOPLE • BETTER SERVICE • BETTER RESULTS
July 19, 2011 RECEI VEii
JUL 20 2011
CUFF OF ENCIN
CM&l b!V IS I ON
Project No. 10707-35A
Mr. Darren Bolton
K. HOVNANIAN HOMES
2525 Campus Drive
Irvine, CA 92612
Subject: Asphaltic Concrete Pavement Design, The Tides Residential Development, Located
on the Southwest Corner of Poinsettia Lane and Lowder Lane, City of Carlsbad, San
Diego County, California
Earth-Strata is pleased to present our pavement design recommendations for asphaltic concrete
pavement sections for The Tides residential development, located on the southwest corner of Poinsettia
Lane and Lowder Lane, in the City of Carlsbad, San Diego County, California. Two representative samples
of the subgrade earth materials were obtained from Seaworthy Lane and Lazarette Way.
R-Value: The R-value of representative samples was determined using the guidelines of CTM 301. The test
results are presented in the table below.
- A15-9 tLL MAE PJö
Seaworthy Lane Silty Sand 58
Lazarette Way Silty Sand 59
ASPHALTIC CONCRETE PAVEMENT DESIGN
Laboratory testing of representative earth materials indicate R-values of 58 to 59. The table includes our
minimum recommended asphaltic concrete pavement sections calculated in accordance with the State of
California design procedures using Traffic Index of 5.0. Alternative pavement sections and calculation
sheets have been provided within the attachment of this letter.
Assumed Traffic Index
Design R-Value
AC Thickness (inches)
AB Thickness finches
Notes: AC - Asphaltic Concrete
AB - Aggregate Base
* Denotes Minimum Section
EARTH - STRATA, INC. 26047 JEFFERSON AVENUE, SUITE C, MURRIETA, CA 92562 OFFICE (951)461-4028 • FAX (951)461-4058 WWW.EARTH-STRATA.COM
BETTER PEOPLE- BETTER SERVICE- BETTER RESULTS
5
50
3 4*
The subgrade earth materials immediately below the aggregate base (base) sJiouid be compacted to a
minimum of 95 percent relative density based on ASTM D 1557 to a minimum depth of 12 inches. Base
materials should be compacted to a minimum of 95 percent relative density based on ASTM D 1557.
Base materials sh&t.rid consist of Class 2 aggregate base conforming to Section 26-1.02B of the State of
California Standard Specifications or crushed aggregate base conforming to Section 200-2 of the Standard
Specifications for Public Works Construction (Greenbook). Base materials-1 1l%e compacted at or
slightly below optimum moisture content. Asphaltic concrete materials and construction operations
should conform to Section 203 of the Greenbook.
Earth-Strata appreciates the opportunity to offer our consultation and advice on this project. In the event
that you have any questions, please do not hesitate to contact the undersigned at your earliest
convenience.
Respectfully submitted,
EART]HISTRATA ][NC,
No. 692
CD M
+Sthen M. Poole, PE, GE OF
Principal Engineer
CW/SM P/am
Attachment: Asphaltic Concrete Pavement Calculations
Distribution: (2) Addressee
(2) Site Superintendent - Mr. Kyle Shephard
Proposal No. P10707-35A 2 July 19, 2011
APPENDIX A
ASPHALTIC CONCRETE
PAVEMENT CALCULATIONS
PAVING DESIGN
JN:
PROJECT:
10707-35A
The Tides
CONSULT SMP
- Earth Strata, Inca I G.ot.chnleal. Environmental and Malarlata Testing ConulMnt*
BETTERPEOPLE • BETTER SERVICE • SETTER RESULTS
CALCULATION SHEET # Streets
CALTRANS METHOD FOR DESIGN OF FLEXIBLE PAVEMENT
Input "R" value or "CBR" of native soil 50
Type of Index Property - "R" value or "CBR" (C or R) R R Value
R Value used for Caltrans Method 50
Input Traffic Index (TI) 5
Calculated Total Gravel Equivalent (GE) 0.8 feet
Calculated Total Gravel Equivalent (GE) 9.6 inches
Calculated Gravel Factor (Gfl for A/C paving 2.53
Gravel Factor for Base Course (Gf) 1.1
Pavement sections provided below are considered equal; but, do not reflect reviewing agency minimums.
INCHES FEET
Gravel Equivalent A/C Section Minimum A/C Section Minimum
GE GE Delta Thickness Base Thickness Base
(feet) (inches) (inches) (inches) (inches) (feet) (feet)
0.63 7.60 2.00 3.0 1.8 0.25 0.15
0.74 8.87 0.73 3.5 0.6 0.29 0.05
0.84 10.14 -0.54 4.0 0.33
1.06 12.67 -3.07 5.0 0.42
1.27 15.21 -5.61 6.0 0.50
1.48 17.74 -8.14 7.0 0.58
1.69 20.28 -10.68 8.0 0.67
1.90 22.81 -13.21 9.0 0.75
2.11 25.35 -15.75 10.0 0.83
2.32 27.88 -18.28 11.0 0.92
2.53 30.42 -20.82 1 12.0 1.00