HomeMy WebLinkAbout; Laguna Riviera Unit 1 Lot 15-18; Soils Report; 1967-02-28- <
.-
WOOOWARD~CLYDE~SHERARD&ASSOClATES
&%&hem California Operations
CONSULTWO ENGlNEERS AND GEOLOGlSTS
-
3467 K”rtZ street ssn Dieso February 28, 1967
California 92110 Project No. 66-237 (714) 224-2911
-
-
Kamar Construction Company
325 Elm Avenue, P.O. Box 71
Carlsbad, California
MA2 I 1967
CITY OF CARLSBAD Building Department
LAGUNA RIVIERA ESTATES UNIT NO. 1 LOTS 15 THROUGH 18 - CARLSBAD, CALIFORNIA
In accordance with the request of Mr. Jerry L. Rombotis of your firm, we
have provided soil enqineerinq services in conjunction with the grading
operations done onLots 15 throuqh 18 at the subject site. These
services included observation of the removal of potentially expansive
soil existing within two feet of rough lot qrade and the testinq of fill
as placed and compacted.
Site preparation, compaction and testino were done between Februar.y 6
and February 20, 1967, in accordance with the Earthwork Specifications and
recommendations presented in our letter dated January 10, 1967.
Fill was placed, compacted and tested on Lots 15, 16, 17 and 18. As the
site qradinq progressed, the compaction procedures were observed and
compaction tests were made to determine the relative compaction of the
fill in place. Field observations and compaction test results 'indicate
that the fill has been compacted to 90 percent or more of maximum
laboratory density. The approximate locations of compaction tests are
shown on the attached Fiqure 1.
Laboratory tests to determine moisture-density relationships, maximum
dry density, optimum moisture content, qrain size distribution, plasticity
characteristics and strenqth characteristics were performed on representative
samples of the material used for fill. The results of compaction tests and
laboratory tests are qiven on the attached forms.
Laboratory tests indicate that nonexpansive fill was placed within 2 feet
of rouqh qrade.
During grading of cut-fill Lots 15 and 17, potentially expansive clays
encountered within 2 feet of finish qrade were excavated and replaced with
properly compacted nonexpansive soil. The approximate limits of the area
undercut for clay are indicated on Fiqure 1.
Footings for residential structures placed on nonexpansive undisturbed soil
or nonexpansive properly compacted fill may be desiqned for a sol1 bearinq
pressure of 2,000 pounds per square foot, (total load) at a depth of 12 inches
below rough lot qrade.
1545 Wilshire Blvd., LAW ~I&s, Calif. 80017
( 213 ) 433-5235
758 No. Bahvia. h.We. hIif. 92M-9
(714) 633-3316
-
-
-
-
-
-
Kamar Construction Company
Project No. 66-237
February 28, 1969
Page 2
The elevation of compaction tests shown as finished grade (F.G.) tests correspond to the elevations shown on the qradinq plans for Laguna
Riviera Tract, Unit No. 1, City of Carlsbad, California dated January
7, 1967 and prepared by Raymond R. Ribal, Civil Enqineer.
This report covers the fi.11 placed under our observation durinq the dates specified above. Additional fill placed after these dates, as
well as the backfill in utility trenches located within 5 feet of a
.buildinq and greater than 12 inches deep, or any trench 5 feet or more
from a buildinq and in excess of 5 feet in depth, should be compacted
under the observation of this office and tested to assure compliance
with the earthwork specifications of the project, This office should
be contacted at least 24 hours prior to backfillinq operations. Utility
service trenches within 5 feet of the building that are perpendicular
to the building footings and are less than 12 inches wide and less than
3 feet deep are not subject to this recommendation.
Structures that will not tolerate differential settlements (such as
foundations, swimming pools, concrete decks, walls, etc.) should not be
located within 5 feet of the top of a slope. Footings located closer
than 5 feet from the top of the slope should be extended until the
bottom edqe of the footinq is 5 feet horizontally from the outside face
of the slope.
The inspections and tests of compaction made durinq the period of our
services on the subject site were in accordance with the local accept-
able standards for this period. The conclusions or opinions drawn from
the tests and site inspections apply only to our work with respect to
qrading and represent conditions at the date of our final inspection.
We will accept no responsibility for any subsequent chanqes made to
the site by others or by uncontrolled action of water or by failure of
others to properly repair damaqes caused by uncontrolled action of water.
4 / +“_- ~, , * _ ,. -,;c ,?.. ,-
Louis J. LeeiR. E. 14129
CFM/LJL/pf
Attachments
(3) Kamar Construction Company
(2) City of Carlsbad, Buildinq Inspection Dept.
WOOOWARD - CLYDE - SHERARD AND ASSOCIATES corxuuing Sail an* Fmmlhliml eaginm* and Ce”lo&+ist,
CL~.,PACTION TEST RESULTS
hB NAME Laguna Riviera, Unit #l
.JOBN~MBER 66-237
D,,TE February 28
- DATES ( February 10 through February 20, 1967 PAGE 1 OF 2
DAn 7x*, RI7SII, LGcA1,ON - NUMBER -
Feb. 10 - :
3
- Feb. 13 z
7
Feb. 14 10
11
- Feb. 15 12
Feb. 16 14
Feb. 17 15 18 48.0' 11.7
16 15 44.0' 13.0
17 17 49.0' 11.1
Feb. 18 18
:i
Feb. 20 21
22
23
24
-.
LOT:
18
;z
1';
15
,i:
16
17
15
;;
17
;;
16
15
, 1967
---- __~--
,E!.%Y - _ -~-
40.0' 16.3
36.0' 14.3
40.0' 15.6
43.0' 12.3
44.0' 14.9
40.0' 14.3
40.0' 11.7
45.0' 15.6
44.0' 13.6
47.0' 13.6
48.0' 13.6
51.0' 14.3
53.0' 13.0
E*
50.0'
F:G:
55.0'
48.0'
F.G. 45.5
11.1 117.8 121.5 97.0
12.3 117.2 121.5 96.4
14.9 116.3 121.5 95.8
14.3 115.3 121.5 94.9
107.3 114.0
108.3 114.0
104.9 116.5
112.4 116.5
108.4 114.0
108.0 114.0
112.2 116.5
108.2 116.5
111.7 121.5
110.0 121.5
107.3 121.5
117.0 121.5
110.8 121.5
120.2 121.5
115.4 121.5
118.8 121.5
94.2
95.1
90.1
96.7
95.2
94.7
96.2
93.0
91.9
90.6
88.4
96.3
91.2
99.0
94.3
97.8
WOODWARD l CLYDE l SHERARD & ASSOCIATES So4 Od Fo”**ion .?npineednp
1 I 1 I I 1 1 1 1 1 I I I I I ! I I
. .
Page 2 of 2 !
1
DIRECT SHEAR TEST MECHANICAL ANAL& -
14c
13c
IZC
110
IOC
9(
B(
DtRECT SHEAR TEST DA1
Dry Density, pcf
Initial Water Content, %
FInal water content, %
Apporen t Cohesion, psi
Apparent Frfctlon Angle, a
'13.8
18.7
600
27
I
Grm Size in MIIIImeters
ravel 1 sand es -~d~-r-t~ %
f m Zero Atr Voids Curves
I
EXPANSIBILITY CHARACTERISTICS I 2 3
Liquid Limit, % 42 __ __
Specific Grov~ty
%-d / 2.50
venstry, pcf 1114,011lL512L5
Optimum Moisture
rnn+.nt % I 12.51 13.5 17.!i
Potential Expansibliltv
26 *NP *NP
-- -- -_
30 14 6
1
*NP = Non Dlastic
WOODWARD, CLYDE, SHERARD & ASSOCIATES
FILL SUITABILITY TESTS
I I I I I I 1 I I I I I
Moisture Content, %
J
I f$;UNA RTVTFRS IINTT #l
I” L” 30 40 I 66-237
LABORATORY COMPACTION TEST
--===I I J