HomeMy WebLinkAboutCT 74-21; CARLSBAD OAKS BUSINESS PARK; RECOMMENDED PAVEMENT SECTIONS; 1986-06-060~ ~ p 2g,tf(.f
SAN DIEGO GEOTECHNICAL CONSULTANTS, INC.
SOIL ENGINEERING & ENGINEERING GEOLOGY
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Kaiser Development Job No. 30012-31 2121 Palomar Airport Road, Suite 201 Log No. 6-5031
Carlsbad, California 92008
Attention: Mr. John Burke
SUBJECT: RECOMMENDED PAVEMENT SECTIONS
Palomar Airport Road
Sta._18+10 to Sta. 64+68 -
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Carlsbad, California
Gentlemen:
In response to your request, we are presenting our recommen-
dations for pavement sections for Palomar Airport Road between
Station 18+10 and Station 64+68.
Eight representative samples of the prevailing sub-grade soils
were obtained and tested for their "R" Value. The results of
these tests are shown on the attached figures. Our pavement
section recommendations are based on the following traffic
and sub-grade conditions, and the California Division of High-
ways design procedure.
Prevailing Subgrade:
(Station 18+10 to 39+00)
Traffic Index:
City of Carlsbad Spec.:
Lt. orange brown sandy
clay
"R" Value = <5
9.0
6" mm. A.C. thickness
Recommended Pavement Section:
- -___ '6-inches -.of -asphalt concrete over 20-inches ofj -
ntreatedClass2aggrega t e base
Prevailing Subgrade:
(Station 39+00 to 53+50)
Traffic Index:
City of Carlsbad Spec.:
Brown sandy clay
"R" Value = 15
6" mm. A.C. thickness
6455 NANCY RIDGE DRIVE • SUITE 200 • SAN DIEGO, CALIFORNIA 92121 • (619) 587-0250
SAN CONSULTANTS
E. 28110
0
President
Kaiser Development Job No. 30012-31
June 6, 1986 Log No. 6-5031
Page Two
Recommended Pavement Section:
inchesof asphalt concrete over of
untreated Class 2 aggregate base.y
Prevailing Subgrade:
(Station 53+50 to 64+68
Traffic Index
City of Carlsbad Spec.:
Red-brown silty clay
"R" Value = <5
we
6" mm. A.C. thickness
Recommended Pavement Section:
ex 14e.
m:_inches_,of_,aS alt _______Ti 3a-8
ntreated Class 2 aggregate base.J
A sufficient number of in-place density tests should be per-
formed throughout the recommended sections as an indication
of the actual compaction obtained. All loose or unstable
areas should be removed as recommended by the soil engineer.
All paving materials and methods of construction should con-
form with good grading practices and with the requirements
of the governing agency. Paved areas should be protected
from moisture migrating under the pavement from adjacent
water sources such as irrigated areas. Saturation of the
underlying soils could result in local pavement failures.
If you should have any questions regarding the above, please
contact the undersigned at your convenience. We appreciate
this opportunity to be of professional service.
Very truly yours,
MJM : pt
Distribution: (4) Client
(2) Rick Engineering Company