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Home My WebLink AboutCT 81-46; Carlsbad Airport Center Phase I; Soils Report Addendum; 1987-03-27MOORE & TABER GEOTECHNICAL ENGINEERS AND GEOLOGISTS ,290 NORTH HANCOCK STREET. P.O. BOX 19079 . ANAHEIM, CA 92817 TELEPHONE: (714, 779-259, . FAX (714) 7794377 March 27, 1987 Job No. 285-256 Carlsbad Airport Center - 2204 Garnet Avenue Suite 102 San Diego, California 92109 - - - - ..- - - - - ADDENDUM SUBGRADE INVESTIGATION CARLSBAD AIRPORT CENTER PHASE I CT ewb CARLSBAD, CALIFORNIA Subsequent to our report of December 5, 1986 we have obtained another l'R" Value sample at Station 108+10. Apparently there was some concern regarding the depth of pavement section. Based on the more recent test, we can revise the section to less than originally given. The original section based on a TI of 9 and "R1' Value of 39 was 6"AC/9"AB. Using a TI of 9 and a revised "RI* value of 50 the new section would be 6"AC/6" AB. Sand Equivalent test were obtained from R-Value samples R-Value samples R-14 and R-16 only. The results of these tests are 18 and 14 respectively. The sand equivalent and R Value for Sample 22 taken at Station 108+10 is shown on the attached page A-la. All other recommendations given in our previous report are still considered applicable. MOORE & TABER Dugald R. Campbell Registered Civil Engineer 18723 (Expires - 6-30-89) rc Attachments: Location of Subgrade Samples Plan A-l Table 1 A-la Distribution: (4) Addressee ENGINEERING DEPT. LIBRARY City of Carlsbad 2075 Las Palmas Drive Carlsbad, CA92009-4859 -- - - - - -, MOORE & TABER GEOTECHNICAL ENGINEERS AND GEOLOGISTS Table 1 RESULTS OF RESISTANCE TEST Test Method 301F Sample #22 Specimen Dry Moisture Exudation Expansion Stabilometer Number Density Content Pressure Dial Reading *'R" Value -------- ------- -------- --------- -------------------_____ (pcf) (%I Psf x10-4 E 115.7 114.3 12.7 13.8 756 340 59 39 63 54 C 113.2 14.4 232 18 45 The material is classified as a CLAYEY SAND (SC) with a sand equivalent of 13 as determined by Test Method ASTM 2419. - - - Job No. 285-2.56 - March 27, 1987 Page A - la - - - / - MOORE & TABER GEOTECHNICAL ENGINEERS AND GEOLOGISTS 1290 NORTH HANCOCK STREET. P.O. BOX IS079 . ANAl+EIM. CA 9281, TELEPI-IONE: (714) 779-2591 . FAX: (714) 7798377 SUBGRADE SOIL INVESTIGATION Carlsbad Airport Center Phase I Carlsbad, California CLIENT Carlsbad Airport Center Suite 102 2204 Garnet Avenue San Diego, California 92109 . - - - - December 5, 1986 Job No. 285-256 - /’ MOORE & TABER GEOTECHNICAL ENGINEERSAND GEOLOGISTS - - - - ,- - - - .~, - - - - - SUBGRADE SOIL INVESTIGATION Scope This report presents the results of a subgrade soil investigation for the first phase of development for the Carlsbad Airport Center. The study was carried out for the purpose of determining subgrade soil characteristics for pavement design based on the City of Carlsbad street design criteria Table A. The work involved the field examination and sampling of earth materials by representatives of Moore & Taber, laboratory testing, and engineering calculations. The study was authorized by Mr. Don Cook of The Carlsbad Airport Center. Field and Laboratorv Investiqation The field work was completed in November, 1986, and consisted of the inspection of the site and the sampling of the subgrade materials by a geotechnical representative of this firm. The locations from which subgrade samples were taken are shown on page A-l of the attached Appendix. Twenty-one subgrade samples were obtained for laboratory testing. Resistance value tests were performed on 11 samples of subgrade soils in accordance with the State of California, Division of Highways Test Method No. 301-F. Sand equivalent and 200 wash sieve tests were also performed on most of the'samples in accordance with ASTM Test Method 2419-69 and ASTM 1140, respectively. The results of all tests and description of the subgrade materials are given on pages A-2 and A-4. Recommendations The recommended pavement section will be verified by representatives of the City of Carlsbad using the laboratory test data and the Pavement Design Standards of the City for flexible pavement design, Table A. For tentative planning, preliminary design sections based on the above information (which must be verified by the City of Carlsbad) are as follows: Job No. 285-256 - December 5, 1986 -2- MOORE & TABER GEOTECHNICAL ENGlNEERS AND GEOLOGlSTS - - - - - - - .- - - - - - - Location ---__--------_--__ Palomar Airport Road Sta lOO+OO to llO+OO and 125+50 to 127+00 Sta llO+OO to 125+50 and 127+00 to 130+00 Sta 130+00 to 152+00 Camino Vida Roble Sta lo+50 to 16+50 Sta 16+50 to 27fOO and 37+25 to 38+35 Sta 27+00 to 37+25 Palomar Oaks Way Sta 23+00 to 32+00 Sta 32+00 to 38+00 Sta 38+00 to 45+50 Sta 45+50 to 46+25 Owens Avenue Sta 4+00 to 9+50 Wright Place Sta lo+50 to 14+75 Dryden Place Sta 9+78 to 19f50 7/22 4" AC / 11" AB TI/R-Value 9/39 9/50 9/20 a/39 8/23 8/45 a/39 8/23 B/18 8/50 7/45 4" AC / 6" AB 7/18 Pavement Section (tentative) --_---------------_ 6" AC / 9" AB 6" AC / 6" AB 6" AC / 14.5" AB 4" AC / 10" AB or 6" AC / 6" AB 4" AC / 14.5" AB or 6" AC / lo.511 AB 4" AC / 8" AB 4" AC / 10" AB or 6" AC / 6" AB 4" AC / 14.5" AB or 6" AC / 10.5" AB 4" AC / 16" AB or 6" AC / 12" AB 4" AC / 6" AB 4" AC / 12.5" AB or 6" AC / 8.5" AB Job No. 285-256 - December 5. 1986 -3- - .- .-~ - - - - - - - - - MOORE & TABER GEOTECHNICAL ENGINEERS AND GEOLOGISTS The Asphalt Concrete (AC) and Class II Aggregate Base (AB) should conform to and be placed in accordance with the latest revision of the City of Carlsbad's Road Department Standards. 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 Dugald R. Campbell Registered Civil Engineer 18723 (Expires June 30, 1989) lkr Attachments: Pages A-l - A-4 Distribution: (2) Addressee (3) City of Carlsbad Job No. 285-256 - December 5, 1986 -4- I I I I / I I I I I I I I I I I LO&~TIO~J OF 6~6&,?A.D~ 5Ah&=~E-5 GA%d3AD, AXPOm- C.E+JJ-~Q L-LZR~~anO) &A. 28+-C-3‘& 0 N 4&A L.E : l”~54~~ ’ I I I I I I I I I TABLE1 REsuLTsoFREs1STANcEvAulEm Description 6 Sample No. specimen SandEquivalent Dry -g-d Lmation Mmber &0..i&~r0 Density (pcf) Pal- Airprt Wad R-l Sta. 132+60 R-2 std. 139+70 R-5 Sta. 125+00 R-6 std. 115+00 R-14 sta. 107+30 R-15 Std. 132+25 Light bran SILTY SAN? (sm) 12/26 Light brown 110.3 16.3 438 SILTY SAND (sm) 109.4 17 .2 275 20/36 109.0 18.1 227 Light brcxm 108.9 15.5 564 SILTY SAND (sm) 107.5 16.4 191 15/28 107.3 17.3 107 Tanishbrm 107.1 16.4 586 SILTY SAM) (sm) 104.6 17.3 236 30/21 103.5 18.2 102 42 33 31 19 25 17 31 71 12 54 3 39 22 65 12 59 5 54 Light bran SILTY SPJ?D (sm) 18/-- Light brmm SANDY CLAY (CL) 9/-- BrmnSILTY SAJD (sm) 14/ Light brown 112.5 16.3 626 26 46 SANDY SILT km) 108.2 18.1 279 10 21 9/-- 106.0 19.0 215 7 13 I I I I I I Expansion kkCsture Exudation Dial Oontent pressure l+ze&ng (N (psi) (X10-4) Stabil- EValue at areter Quilibrium "R" Value T.I.='9,'8;,7'. 20 62 61 23 I I I I I I I I I I I TABLE1 RESULTS OF RESISTS VALm TESTS cescri.ption& Sarple No. specimen SadEquivalent Dry Moisture -+-xl Location Nmber r+s%ults Density Content .~- -._ R-20 b" sta. 120+10 0 Camino Vida Rcble (Ff) _.. Tam-&h brmn 113.3 15.2 SILTY SAND (a) 112.3 16.1 11/37 110.9 17.0 R-3 sta. 17+00 R-4 std. 21+00 R-7 std. 11+50 R-8 Std. 36+15 R-13 Sta. 26+30 Owens Avenue R-17 Std. 5+60 b” c! Light gray 113.9 SANDY SILT (ml.) 110.8 16,'37 108.1 Light gray brm 107.3 SANDY SILT (ml) 105.3 /65 101.2 Light brmm SILTY SAND (sm) 16/31 14.9 16.2 17.6 16.8 17.7 19.6 567 74 49 287 46 43 213 27 34 526 120 42 398 82 34 234 32 13 Light gray brown 114.7 13.8 637 85 66 SILTY SAND (sm) 110.7 14.7 255 69 58 16/35 110.5 15.6 199 47 50 Light gray brmn SAND% SILT (ml) 12/-- Light brcwn SILTY SAW km) 27/-- Fxulation Pressure (psi) ..~ 330 301 258 / I I I Expansion Dial m x 35 20 15 Stabil- crrreter "R" Value 52 39 35 I I R-Value at EQuilibrim T.I.=: .9, 8,~_7 ~~ - 39 39 expansion 22 expansion 45 expansion / \ I I Sanple No. SpXilWl ~anlI.cxation tamhr Palcxnar Oaks Way R-9 Sta. 24+00 R-12 std. 35+00 b" c R-19 :Sta. 44+90 Wright Place R-21 std. 11+70 b" c Dryden Place R-10 33.. 11+00 R-11 b" Lightbrm 112.3 16.0 457 31 45 Std. 18+00 CLAYEY SAND (SC) 108.3 17.8 236 16 16 c 13/44 105.8 19.1 127 12 9 I I / I I / TABLE1 REsuLE.cFREzxsT~vAulETEsfs Description & san3l3quivalent Dzy Moisture em stabil- F&alue at Exudation ‘ auzter Quilihriun I%ssu.lts Density Qntent Preaslllre a "R" Value T.I.=\ 9, C,.: 7 _ (Ff) (8) (psi) (X10-4) _. .~~ 15/-- ll/-- 25/-- 112.8 16.0 610 15 44 109.1 18.0 328 45 26 106.2 19.8 242 20 11 Gray SIL'EYKNE 93.1 28.6 317 115 21 6/94 92.0 29.6 286 90 16 90.6 30.6 239 71 12 Brmm SILTY SAND km) 14/33 23 18 22