HomeMy WebLinkAboutCT 76-17; CANON PARK UNIT 1 AND 2; SOILS REPORT; 1978-03-08/ '.
• .' BENTON ENGINEERING, INC. .
APPI..IED 5011.. MECHANICS -FOUNDATIONS
PHII..IP HENKING BENTON
PRESIOEN-r • CIVIL ENGINEER
~a Costa Lc:md Company
2100 Co~ta Del Mar Road
Cqrlsbaq( 'Cal ifornia 92008
Svblect; Project No. 77-1-5D
6717 CONVOY COURT
SAN OtEGO. CAI..IFORNIA 92111
March 8, 1978 .
Results of Field Density Tests
Taken in Subgrade and Bqse Material
Canon pqrk Unit Nos, 1 and 2
Cqrlsbad Tract No. 76-17
La Costa Avenue and Cadencia Street
Carlsbad, California
TELEPHONE (714) 565·1955
RECEIVED
MAR 9 '1978
CITY OF CARL~t)h ... ,
Engineering Department
This is t9 report the results of field density tests taken in compacted subgrade and base mweriQls
plqc~d in certcin street areas of Canon Park Unit Nos. 1 and 2 in Carlsbad, California.
The te~t~ were taken on the dates indicated below:
Tests Tak~n in Subgrade. Soils:
Te.sts Taken in Base Materials:
Test No.
2 to 11, inclusive
1, 2, and 3
.4 to 13,. inclusive
14, 15, and J6
Date of Test'
December 21, 1977
December 22, 1977
February 22 ( 1978
February 23 ( 1978
February 24, 1976
The t~sts Were taken in the subgrade soils prior to the heavy rains which have occl,.lrreq during
January Qnd February of 1978. Unsuitable subgrade soils; softened alld eroded by the rqins,
wer:? removed and replaced with properly compacted base material.
The approximqte. location at which the tests were taken and the fined test results ore presented
t,$ follows.;
t ',-'" .. ; • • March s, 19.7S I'roject No. 77-1-50 -2-
La Costd Land Company
Maximum
Field Dry Dry
test Moisture Density Dehsity Percent.
No. Approximate. Location (% dry wt) (Ib/cu ft) (Ib/cu ft) Compo c:ti oli.Remarks. .
, ,
Tests Taken in Subgrade Soils
1 Pueblo Street (fita .2470) 14.9 113.3 118.6 95.5
2 BrdVd Street . (Sta. 9+30) 12.9 100.6 '1l8.6 8.4.8 Rewbrked
3 Bravd Street (Sta .6+00) : 12.6 114.8 118.6 96.8
4. Madera Court (Sta. 1 +50) 12.7 109.7 118.6 92.5
5 Brava Street (Sta.1'i'+oO) 9.8 106.6 117.6 90.6
6 Brava Street (Sta. 13+00) 13.7 113.0 118.6 95.3, .
7 Brava Street (Sta. 15+60) 10. 1 112.9 124.0 91.0 ____ -. ------.:. -~--. -~ '~.1
8 Verde Av~nue (Sta. 14+00) 12.0 117.7 128.0 91'.0 ,-" -
9 Verde Avenue (Sta. 12+50) 10.4 106.6 117.6 90.6 ' .
10 Cdr! ina Street (Sta.9+50) 15.0 115.8 128.0 90.5,
11 Hdtaca Road (Sta.7+50) 9.4 108.8 118.6 91.1
, ,
Tests Taken in Base Materials j , 1
Thickness Maximtim
of Base Field Dry Dry
Test at Test Moisture Density Oensi ty , Per¢ent .
No. ApproxImate Location (in feet) (% dry wt) (lb/cu ft) (Ib/ cu ft) Com~dctlol1 Remarks
1 Pueblo Stteet (Sta .2+70) 1.0 7.2 120.8 132.0 91.4
2 Brdva Street (Sta .5+60) 2.0* 7.9 123.8 130.3 95.0
3 Brava Street (Sta .7+70) 2.0* 7.0 123.2 130.3 94.5
.4 Brava Street (Sta .5+10) 1.0 7.3 107.1 130.8 82.3' Rew6rked
5 Bravo Street (Sta .7+50) 1.0 8.2 120.3 132.0 ' 91.3:
6 BraVd Street (Sta .5+10) 1.0 7. 1 i 17.7 130.3 90.5 Checkori#4
7 Madera Court (Sta.1+45) 1.0 7,8 118.7 132.0 90.0
8 Madera Court (Sta .0+60) 1.0 7.3 123.3 132.0 93.S
9 Madera Court (Sta.1+30) 2.0 6.8 120.3 13,0.3 92.j
10 Madera Court (Sta. 1 +30) 2.0 10.5 116.3 128.7 90.5
11 Brdvo Street '(Sta .5+20) 2.0* 7.8 127.2 132.0 96.5
12 Brdvd Street (Sta .7+80) 2.0* 7.8 124.0 130.3 95.2
13 Bravd Street (Sta.9+60) 2.0* 7.2 127.9 132.0 97.0
14 Pueb 10 Street (Sta .3+30) 2.0* 6.2 129.5 132.0 98. 1
15 Madera Court (Sta. 1 +40) 3.0* 8.3 130.5 132.0 98.8
16 Madera Court (Sta .0+70) 3.0* 6.3 126.0 132.0 95.4-
* Ind icates fi n ished grade.
BENTON ENGINEERING, INC.
Project t'lo. 77-1-5D • -3-• March i3, 1975
1d Costa Land Company
LABORAtORY TEST RESULTS
The niaximum dry densities and optimum moisture contents of the subgrade and bdse t'lid~ert(:lls~
as determined by the ASTM D 1557-70 method, that uses 25 blows of a lO-f:!outid rdh'lmer fdlllng
from a height of 18 inches on each of 5 layers in a 4-inch diameter 1/30 cubic fo~t compaction
cyl inder I are presented as follows:
Soi I Description
Light brown and gray silty clay
Yellow brown fine sandy silt
Light brown fine sandy clayey gravel
Brown clayey fine to medium sand
Brown fine to coarse sand (D. G. base)
BroWh fine to coarse sand (D. G. base)
Respectfully submitted,
BENTON ENGINEERING, INC
By d?'c:? ~
R.C. Remer
RCE No. 19913
Distrlbutioh: (2) Addressee
Maxi 'f!um
Dry Density
(lb/cu ft)
,118.6
117.6
124.0
, 128.0
132.0
128.7
(1) Addressee -Attention Mr. Burton c. Kramer
(1) City of Carlsbad, Engineering Departmer r
Opt f mUm
Moisture COh~eht
(% dry wt)
. t4~()
13.5 '
.-1.2,,5.
9.2
1.5
7.5
(1) City of Carlsbad, Engineering Department, Attention Mr. Russ Morrisoh
(1) Ri ck Engineering Company, Carlsbad
RCR:dr
BENTON ENGINEERING, INC.