HomeMy WebLinkAboutCT 81-46; Airport Business Center; Soils Report; 1987-10-12MOORE & TABER GEOTECHNICAL ENGINEERS AND GEOLOGISTS
4530 EAST LA PALMA AVENUE ANAHEIM , CALIFOt?NIA 92807 ,714, 779-2591
Centre Development Graham International Plaza 2111 Palomar Airport Road Suite 300 Carlsbad, California 92009
COMPACTION TESTS AIRPORT BUSINESS CENTER cnwvo
CARLSBAD, CALIFORNIA -----------------_-____
October 12, 1987
Job No. 285-256
E"GlNEWG DEPT. Ll&+jRy
city of Carlsbad 2075 Las Palmas Drive Carlsbad, CA 92009-4859
In compliance with your request, we have observed and tested soil recompaction in portions of the sewer, storm drain, water,
electric, gas and telephone utility trench backfills. Tests were also obtained within the prepared subgrade and baserock prior to asphalt paving for portions of the street areas and random density tests were also obtained in the asphalt concrete.
The maximum dry density and optimum moisture content of the representative soils and aggregate base material were determined
in the laboratory by ASTM Test Method D1557 and California Impact Test 216-F, respectively. The results of the compaction curves
were:
Soil Type Description --------- -------------------
D Yellow and white SANDY SILT
E Tan-Gray CLAYEY SILT
I Yellow-brown CLAYEY SILT with SILTSTONE
Maximum Dry Density -----------
(pcf)
111.8
121.5
106.0
Optimum Moisture Content ----------------
(percent)
14.5
11.0
16.8
MOORE & TABER GEOTECHNICAL ENGINEERS AND GEOLOGlSTS
Centre Development
Soil Type ---------
K
T
X
BB
HH
AC
Maximum optimum Description Dry Density Moisture Content _------------------ ----------- ----------------
(pcf) (percent)
Light tan fine to medium SILTY SAND 110.5 13.0
Tan-gray SILTY SAND 115.5
Tan-white SILTY SAND 113.0
Light yellow-gray fine 113.5 SILTY SAND
13.8
14.0
13.5
Mottled orange-brown 113.0 SANDY SILT w/SANDSTONE
Light tan fine SILTY 110.0 SAND
14.0
16.0
Mottled gray-green 106.0 SAND SILT w/SILTSTONE
Gray BASEROCK 141.0
Asphalt Concrete Paving 146.5
17.0
7.8
----
Page 2
The compaction density was determined by fifty-nine (59) relative compaction tests taken at random depths and locations. The test samples were obtained by the drive cylinder, sand volume and nuclear gauge methods as described in ASTM publications. Testing was supplemented by probing those areas not tested to determine similarity in compaction. Results of the tests are given in Table 1 and their locations are shown on the attached drawing.
Based on our tests and observations, we conclude that the utility trench backfills tested have been compacted to a minimum of 90 percent of maximum density, and that the street subgrade and aggregate base have been compacted to at least 90 percent and 95 percent relative compaction, respectively, where shown on the attached drawing. The thickness, temperature and density of the asphalt concrete pavement was monitored during placement to determine compliance with the specifications.
Job No. 285-256 - October 12, 1987
MOORE & TABER GEOTECHNICAL ENGINEERS AND GEOLOGISTS
Centre Development Page 3
This report has been prepared in accordance with generally accepted geotechnical practices and makes no other warranties, either express or implied, as to the professional advice or data included.
MOORE & TABER
Dave Brown DB/DRC/lkr Reviewe&by Dugald R. Campbell Registered Civil Engineer 18723 Expires, June 30, 1989
Attachments: Table 1 Plan
Distribution: (4) Client Attention: Mr. Frank Wagner
Sob No. 285-256 - October 12, 1987
MOORE & TABER GEOTECHNICAL ENGINEERSAND GEOLOGISTS
Test Number
------
701A 702A 703A 704A 705A
706A 707A 708A 709A 710A
711A 712A 713A 714A 715A
716A 717A 718A 719A 720A
721A 722A nu 723A nu 724A nu 725A
726A 727A
Test Date Test Maximum Elev/Dep Density
(pcf) ------ (ft)’ ----_ ------_
Moisture Dry Content Density
(%I (pcf) -------- -------
Relative Compaction
(%I ----------
07-08-87 109.5 110.5 7.5 94.8 86ckby 704A 07-08-87 108.5 110.5 8.6 98.5 89ckby 703A 07-08-87 110.5 110.5 8.6 99.8 90 07-08-87 109.5 115.5 15.6 108.6 94 07-08-87 112.5 115.5 16.2 104.9 91
07-09-87 -9.0 110.5 7.5 103.4 07-09-87 -3.0 115.5 15.6 105.5 07-09-87 -11.0 115.5 14.2 106.1 07-09-87 -8.0 115.5 13.6 107.5 07-10-87 -9.5 115.5 14.2 107.3
94 91 92 93 93
07-10-87 -5.5 115.5 13.6 109.8 07-10-87 -3.0 115.5 15.6 106.4 07-11-87 -8.0 113.0 14.2 103~.3 07-11-87 -5.0 113.0 13.6 105.9 07-11-87 0.0 115.5 14.2 104.5
95 92 91 94 90
07-13-87 -8.0 110.0 11.7 108.6 99 07-13-87 -4.0 110.0 15.6 106.0 96 07-13-87 -3.0 110.0 13.0 105.3 96 07-14-87 -6.0 110.0 15.6 103.8 94 07-14-87 -3.0 110.0 15.6 105.7 96
07-14-87 0.0 110.5 12.3 108.6 98 07-14-87 0.0 141.0 5.9 135.5 96 07-14-87 0.0 141.0 4.2 136.7 97 07-14-87 0.0 141.0 3.4 137.0 97 07-15-87 -10.0 106.0 18.3 103.8 98
07-15-87 07-15-87 -8.0 106.0 -6.0 106.0 -0.5 113.5 -2.0 113.5 0.0 115.5
17.6 16.2 12.3 13.0
102.2 96 104.4 98 108.6 96 108.6 96 114.7 99
728A nu 07-16-87 729A 07-16-87 730A nu 07-30-87
731A nu 07-30-87 0.0 106.0 14.0 105.2 99 732A nu 07-30-87 0.0 111.8 12.3 107.7 96 73319 nu 07-30-87 0.0 121.5 6.9 116.0 95 734A nu 07-30-87 0.0 115.5 8.8 113.5 98 735A nu 07-30-87 0.0 115.5 10.3 113.7 98
Table I
Job No. 285-256 - October 12, 1987 A-l
MOORE & TABER GEOTECHNICAL ENGINEERS AND GEOLOGISTS
Test Test Number Date Test Maximum Elev/Dep Density
(pcf) ---_-- ---_-- (=I’ ----- -------
Moisture Content
(%i;) -----___
Dry Density
(pcf) -------
Relative Compaction
(%) -L--------
736A nu 07-30-87 0.0 111.8 12.1 109.2 98 737A nu 08-04-87 -2.5 106.0 12.3 98.1 93 738A nu 08-04-87 0.0 113.0 13.9 109.2 97 739A nu 08-04-87 0.0 113.0 18.2 107.0 95 740A nu 08-04-87 0.0 113.0 12.8 109.0 96
741A sv 08-05-87 742A sv 08-05-87 743A 08-05-87 744A nu 08-05-87 745A nu 08-05-87
113.0 14.2 106.8 95 113.0 13.6 106.7 94 113.0 14.9 103.0 91 141.0 4.7 141.7 100 141.0 5.0 138.5 98
746A nu 08-05-87 747A nu 08-05-87 748A nu 08-05-87 749A nu 08-05-87 750A nu 08-07-87
141.0 6.1 137.5 98 141.0 6.2 135.5 96 141.0 7.2 135.2 96 141.0 7.5 138.5 98 141.0 5.3 140.5 100
751A nu 08-07-87 752A nu 08-07-87 753A nu 08-07-87 754A nu 08-07-87
141.0 4.1 138.2 98 141.0 5.2 132.5 94ckby 754A 141.0 4.4 140.7 100 141.0 5.0 138.0 98
132X nu 08-07-87 133X nu 08-07-87 134X nu 08-07-87 135X nu 08-07-87 136X nu 08-07-87
-3.0 -2.0 -3.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0
146.5 146.5 100 146.5 147.0 100 146.5 144.5 99 146.5 146.0 100 146.5 144.5 99
Table I
Job No. 285-256 - October 12, 1987 A-2