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Home My WebLink AboutCT 00-02; CALAVERA HILLS 2; REVISED PAVEMENT DESIGN REPORT COLLEGE BOULEVARD; 2004-04-19T COO2' Geotechnical e Coastal ° Geologic o Envfronmental 5741 Palmer Way Carlsbad California 92010 (760) 438-3155 FAX (76b)-.931-0915 April 19, 2004 W.O. 4028-E-SC Calavera Hills II, LLC 2727 Hoover Avenue National City, California 91950 Attention Mr Don Mitchell Subject Revised Pavement Design Report, College Boulevard Stations 78 to 101t. Reach C, Calavera Hills II, Carlsbad, San Diego County, California Dear Mr Mitchell In accordance with a request from the City of Carlsbad, GeoSoils, Inc (GSl) has reviewed and revised the design and construction recommendations presented in GSI (2004) for asphalt concrete (AC) pavement at the subject site The scope of services provided in preparation of this report included representative sampling of the street subgrade, additional R- value testing, and engineering analysis of pavement design PAVEMENT DESIGN Pavement section design was performed in accordance with the California Department of Transportation (Caltrans) Highway Design Manual of Instructions and the City of Carlsbad Standard Drawings (see the Appendix) Pavement sections presented are based on the aforementioned criteria and resistance value (R-value) data (see the attached Figures 1 through 5), determined from soils exposed at, or near, final subgrade elevations within the subject areas R-value testing was performed in accordance with the latest revisions to the Department of Transportation, State of California, Material & Research Test Method No 301 Pavement design was aided with the computer software programs PAVE and NEWCON90 ASPHALT CONCRETE PAVEMENT Structural Section R-values of 15, 19,.26 41, and 41 were determined for subgrade soils onsite and used in pavement design...The recommended pavement sections are presented in the following table r SAMRLE AGGREGTE F k z2r O.€A1ON fl :' A.C. ,:' BASE - ANDA'TE' TRAFFIC SUBGRADE THICKNESS : THIc1NESSH TRAFFIC AREA CObLkTED INDEX H-VALUE (Inhes)! 4 \ College Boulevard Sta 80 2 8.5 41 5.0 9.0 Stá 78,to 82 ' 04/04: ' College BOulevard Sta 83 2 8.5 41 5.0 9.0 Sta 80 to 86 08/03 ' College Boulevard: '. Sta 87 8.5 26 ' 5.0 '14.0 Sta 86 tO 91 -: '04/04 .-College Boulevard Sta 93+-00 8.5 ' 15' 5.0 17.0 'Sta 919 to 962 04/04 College Boulevard Sta 101 22 8.5 19 5.0 16.0 'Sta 964o 101 08/03 City of Carlsbad minimum (2) Denotes Class 2 Aggregate Base @>78i SE >25) All pavement installation, including preparation and compaction of subgrade, compaction of base material, and placement and rolling of asphaltic concrete should be done in accordance with the City guidelines, and under the observation and testing of the project geotechnical engineer and/or the City. The recommended pavement sections are meant as minimums If thinner or highly variable pavement sections, are constructed, increased maintenance and repair'may be' needed Positive site drainage should be maintained at all times Water should not be allowed to pond or seep into the ground. If planters'or landscaping are adjacent to' paved areas measures should be taken to minimize the potential for water to enter the pavement section. If-the ADT (average daily traffic):or ADTT (average, daily truck traffic) increases beyond that intended, as reflected by the traffic index(s) used for design, increased maintenance and repair could be required for the pavement section. PAVEMENT GRADING RECOMMENDATIONS • General' All section changes should be properly transition ed. If adverse conditions are encountered during the preparation of subgrade materials, special construction methods may need to be employed A GSI representative should be present for the preparation of subgrade, base rock, and asphalt concrete - ' • Caiavera Hills ii, LLC' • • • ' • • • W.O. 408-E-SC H- College Boulevard, Reach C, Calavera Hills II ' • •,: April -19,2004 File e \wp9\4000\4028e rpd Page 2 Subgrade Within street and parking areas, all suruicial deposits of loose soil material should be removed and recompacted as recommended. After the loose soils are removed, the bOttom is to be scarified to a depth of 12 inches, moisture conditioned as necessary, and compacted to 95 percent of the maximum laboratory density, as determined by ASTM Test Designation D-1557. Deleterious material, excessively wet or dry pockets, concentrated zones of oversized rock fragments, and any other unsuitable materials encountered during grading should be removed. The compacted fill material should then be brought to the elevation of the proposed subgrade for the pavement. The subgrade should be proof-rolled in order to ensure a uniform firm and unyielding surface. All grading and fill placement should be observed by the project soil engineer and/or his representative. Base Rock Compaction tests are required for the recommended base section. Minimum relative compaction required will be 95 percent of the laboratory maximum density, as determined by ASTM Test Designation D-1557. Base aggregate should be in accordance with the "Standard Specifications for Public Works Construction" (green book), 1997 edition, or standard Caltrans Class 2 base rock (minimum ft-value = 78). Paving Prime coat may be omitted if all of the following conditions are met: The asphalt pavement layer is placed within two weeks of completion of base and/or subbase course. Traffic is not routed over completed base before paving Construction is completed during the dry season of May through October. The base is kept free of debris prior to placement of asphaltic concrete. If construction is performed during the Wet season of November through April, prime coat may be omitted if no rain occurs between completion of base course and paving and the time between completion of base and paving is reduced to three days, provided the base is free of loose soil or debris. Where prime coat has been omitted and rain occurs, traffic is routed over base course, or paving is delayed, measures shall be taken to restore base course and subgrade to conditions that will meet specifications as directed by the soil engineer. Calavera Hills II, LLC College Boulevard, Reach C, Calavera Hills II FiIe:e:\wp9\4000\4028e.rpd W.O. 4028-E-SC. April 19, 2004 Page 3 Drainage Positive drainage should be provided. for, all surface water to drain toward the cyrb and gutter, or to an approved drainage channel Positive site drainage should be maintained :at all times. Water should not be allowed to pond or seep into the ground. If planters or landscaping are adjacent to paved areas, measures should be taken to minimize the potential for water to enter the pavement section, such as cut-off walls, etc. OTHER DESIGN PROFESSIONALS/CONSULTANTS. S The design civil engineer shall review the recommendations provided herein, Incorporate those recommendations into their plans, and by explicit reference, make this report part of: thëirproject plans. LIMITATIONS The: materials encQuntered on the project site and Utklized for, our an are belied representative of the area, however, soil and bedrock materials vary in character between excavations and natural outcrops or conditions exposed during mass grading Site conditions may vary duetoeasonal changes or other factors. Inasmuch as our study is based upon our review and engineering analyses and laboratory data, the conclusions and recommendations are professional opinions. These opinions have been derived in accordance with current standards of practice, and no warranty is expressed or implied..Standards of practice are subject to change with time GSI assumes no responsibility or liability for work or testing performed by others, or their inaction, or work performed when GSI is not requested to be onsite, to evaluate if our recommendations have been properly. implemented Use of this report constitutes an agreement and consent by the user to all the limitations outlined above, notwithstanding any other agreements that may be in place. In addition, this report may be subject to reviewby the controlling authOrities. • •• calavera Hills ii, LLC • • • W.O. 4028E-SG College Boulevard Reach C Calavera Hills II April 19 2004 File e \wp9\4000\4028e rpd Page 4 Respectfully su GeoSoils, Inc. The opportunity to beof service is greatly appreciated. If you have any questions, please do not hesitate to call our office. f? Iç URCE477) 05 * 'p CA cr4 \Y Robert G. Crisman \~AOIQ* Engineering Geologist, BEV/RGC/BBS/DWS/jk Reviewed by: XDavVii'd W. kellvy Civil Engineer, RCE Attachments: Figures 1 through 5 - R-value Test Results Appendix - References Distribution: (1) Addressee (2) Jobsite, Attention: Mr. Tom LaMarca McMillin Companies, Attention: Mr. Russ Sheldon City of Carlsbad Engineering Department, Attention : Mr. Joe McMahon Calavera Hills II, LLC College Boulevard, Reach C, Calavera Hills II File:e:\wp9\4000\4028e.rpd GoóUs, Inc. W.O. 4028-E-SC April 19, 2004 Page 5 p .1Thil :i .ii 1 gJtTI1u 11j,is, -••u•uuuu•uu•u•i -- --- NOMM _____II•DRUU••IIUUUNU I _____MINUU•U•RU•UTAU••UIUU___________________ ••usuu•iuuru•ausi________ ______________ -1 ••U•RMN•UUUUU : ___uu•u•iuu•uuumau ;çm•..m•mm • _______________________ _____________________ .T.!.— •, s• ii isi• -VALUE TEST RESULTS - _1.lI_zyy_Iy R Carlsbad, CA 920.08r Telephone: (760) 43873155 Number: 4028-E-sc iIEk:i -T !I Comp, actor air pressure Water added. Moistureat_compaction % 8.0 .8.9 9.9 Héightofsample IN 2.43 .•.2.52 .• _.2.63 Drydehsity____.. PCF 132.0 ..125.3 .118.1 R-VaIi:ieby__exudation 69 45 26 R-4616pbyexudation,corrected 67 45 29 Eüdation_prësure .PSI .566; _350 181 Stability_thickness FT 0_136 0_63 0_85 Exansion pressure thickness. . FT 0.27 0.00 . 0.00 __________________ Traffic_ind m ex,assuéd• 4.5 I Graveiequivalentfactor,_assumed .1.25 E.xpansion,__stability.equilibrium 0 R-VaIu..by_expahsion NA R-VaIue by exudation R-Value at écuilibrium 41 Compactor air pressure PSI . 320 220 130 Water, added - % 1.9 2.7 3.7 Moisture at compaction % '8.0 9.0 10:0 Height.of sample IN . 2:34 .2.38 .2.42. Drydensity PCF 1337 1306 R-Valueby_exudation 65 51 26 R-ValUebyexudatioh,_corrected : 61 48 24 Exudation___pressure wPSI 621 359 208 Stabilitytlickness FT 0.401. 0.56 '0.85 Expansion _pressure thickness FT 0.331 0.13 0.00 DESIGN CALCULATION DATA Traffic.,indëx,àssu med 4.5 Gravelequivalent factor, assumed 1.25 Expansion,__ stability _equilibrium 0 R-Valué.by expansion __..• NA - R-Value byx da eution 41 R-Value_ätequilibrkirn 41 SAMPLE INFORMATION Sample Location: CollegeBlvdReachC Sample Description: DarkGraySiltySandW/. Gravel Notes: 30% Retained on 3/4 inch screen Test Method: . . _Cal-Trans Test 301- R-Value By Exudation. 80 Expansion, Stability Equilibrium 2.00 IL 0 1050 0.00. 000 050 100 150 :Stability Thickness (ft) .. -. GeoSoi!s; Inc... . ç .5741 Palmer.Wày . Carlsbad CA 92008 Telephone (760) 438-3155 Fax (760)931-0915 70 60 50 a, 40 >- 30 20 10 0 2.00 800 700 600 500 400. 300 200 100 0- Exudation Pressure (psi) - VALUE TEST RESULTS Project: MCMILLIN Number 4028 E SC Date:. Aug-03 • Figure: . 2 11jj a1I"J U.. AUU•UU•U•UU•UU I l•I• 'Li. •i* :.I.t.I..Ii •• 11 2 l RESULTS -VALUE.GeoSoils, Inc.. Cornpactorairpressure PSI 310 170 90 Wateradded % 12 21 30 Moistureatccimpaction %8.0 9.0 10.0 Heightofsample IN 231241 233 Drydensity PCF 136.9 129.5 130.7 R-Valuebyexudation lu 55 36 17 R-Vaebyexudation,corrected 50 34 16 Etidationpressure PSI 592 377220 Stability..thickness FT 052 0.74 0.96 Expansionpressurethickness FT 0.27 0.00I raffic index",' assumed. 1 Gravel equivalent factor,assumed 1.25 Expansion, stability. equilibrium. 0.58 R-Valué by expansion-.. . 50 R-Valüebyexudatión •;. . 26 R-Value at equilibrium 26 - TEST SPECIMAN A. B "'C. D. Stability thickness FT 077 097 099 Expansion pressurethickriess FT 040 013 000 DESIGN CALCULATION DATA SAMPLE INFORMATION Compactor air. pressure PSI 190 100 80 Watéradded:: .: %1;8 3.2 . 3.6 Moisturèatcompáction % .. 11.0 12.5 ' 13.0 Height of sample IN 2.48 2M .2 .54 'Dry'density. :' ' PCF 121.1 117.9 .116.8 R-Value by exudation 33 16 14 R-VáIie.'by exudétion, corrected ., " '33 16 14 Exi.fdatión pressure•, " . PSI . 650 . 323 242 Traffic index, assumed 4.5 Gravel equivalent factor, assumed 1 25 Expansion, stability equilibrium 0 R-Value by expansion NA R-Value by exudation 15 R-ValUe at equilibrium. . 15 -- 10 60 50 0) 40 (0 > 30 20 10 0 .11 0:00 Sample Location College Blvd93+00 Sample Description: Dark _Brown Silty Sand W/Gravel Notes: Reach C''. 13% Retained on 3/4 inch sieve Test Method: Cal-trans Test 301 ' R-Value By Exudation Expansion, Stability Equilibrium 80, 000 050 100 150 200 800 700 600 500 400 300 200 100 0 Stability Thickness (ft) Exudation Pressure (psi) R - VALUE TEST RESULTS GeoSoils Inc ,. (7 5741 Palmer Way Project MCMILLIN Carlsbad CA 92008 Telephone (760)A38-3155 Number 4028-E-SC Fax (760)931-0915 Date Apr 04 Figure 4 - TEST SPECIMAN A B C D DESIGN CALCULATION DATA SAMPLE INFORMATION Sample Location: College Blvd Reach C 101.00 Sample Description: Dark Gray Sandy ClayW/ Gravel Notes: 36% retained _on_3/4_ inch _sieve Test Method: Cal-Trans Test 301 R-Value By Exudation 80 Expansion, Stability Equilibrium 200 11111 1 111111111 IL I 70 -- 60 I/ ------- - - -i----- - / 150 --- --•-- .50 / - IIIIIIIIIIIIIIIIII 40 :1.00 - / a).. -- 30 ---- 050 IIIIIIIIIIIII 20 / ------ . 10 -- 0.00 0.50 70 1.00 1.50 2.00 800 0 600 500 400 300 200 100 0 Stability Thickness (ft) Exudation Pressure (psi) - VALUE TEST RESULTS GeoSoils, Inc. .. - . ç 5741 Palmer Way Project MCMILLIN Goil, , Carlsbad CA 92008 Telephone: (760) 438-3155 Number: 4028-E-SC . . Fax: (760) 931-0915 . . . . Date Aug-03 Figure 5 Compactor air pressure PSI 240 70 Water added % 4.9 .5.9 6.7 Moisture at compaction 9.1 10.1 11.0 Height of sample IN 2.36 2.48 2.58 Dry density PCF .. . . .. 132.8 • 127.9 123.3 R-Value by exudation 46 22 17 R-Value by exudation, corrected 42 22 . . . . 18 Exudation pressure PSI . . . - 643 403 290 Stability thickness FT 0.62 0.90 0.96 .. . . - •. . . ________ Expansion pressure thickness . . FT • . 0.00 • . 0.00 • . 0.00 Trafflc inde, assumed . . .4.5 Gravel equivalent factor, assumed . 1.25 Epansion, stability equilibrium 0 R-Va!uebyexpansion . . NA R-Value by exudation 19 . R-Value at equilibrium 19 APPENDIX REFERENCES American Public Works Association, 2000, "Greenbook" standard specification for public works construction. California Department of Transportation, 1995, Caltrans, Standard specifications, July printing. Carlsbad, City of, 1993, Standards for design and construction of public works improvements in the City of Carlsbad. GeoSoils, Inc., 2004, Pavement design report, College Boulevard Stations 78 to 101 , Reach C, Calavera Hills II, Carlsbad, San Diego County, California, W.O. 4028-E-SC, dated March 17. NEWCON90, 1991 Computer program forthe determination of asphalt pavement sections, version: April 30. PAVE, Computer program for the determination of asphalt concrete pavement sections. State of California, Department of Transportation, 1987, Highway design manual of instructions, fourth edition. Zw0