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Home My WebLink AboutCT 00-20; FOX MILLER PROPERTY; PAVEMENT RECOMMENDATIONS SALK AVE; 2006-05-23c1 co •2-O * GEOCON * INCORPORATED GEOTECHNICAL CONSULTANTS Project No. 07238-42-03 May 23, 2006 H. G. Fenton Company 7577 Mission Valley Road, Suite 200 San Diego, California 92108 Attention: Mr. Allen M. Jones, AICP Subject: FOX MILLER PROPERTY SALK AVENUE 7+50 TO 27+50 CARLSBAD TRACT C.T. 00-20 CARLSBAD, CALIFORNIA PAVEMENT RECOMMENDATIONS Gentlemen: In accordance with your request, we have performed supplemental geotechnical services for the subject roadway within the Fox Miller property, Tract C.T. 00-20 in Carlsbad, California. The scope of our services included obtaining representative subgrade samples within the street and performing Resistance Value (R-Value) and Sand Equivalent tests. The purpose of our work was to provide pavement design recommendations. To aid in preparing this letter, we have reviewed the improvement plans entitled Improvement Plans for: Fox Miller Property, prepared by O'Day Consultants, City of Carlsbad approval date January 11, 2006, and our report entitled Update Geotechnical Investigation, Carlsbad Tract CT-00-20, Carlsbad, California, prepared by Geocon, Incorporated, dated April 22, 2004 (Project No. 07238-42-01). Subgrade soils in the Fox Miller property are predominantly clayey silt with a trace of fine sand, and exhibit relatively low to moderate R-Value characteristics. Based on field observations and laboratory tests in the project, subgrade materials possess an expansion potential of "medium" (Expansion Index between 50 and 90) as defined by Uniform Building Code (UBC) Table 18-I-B. Geocon Incorporated has performed R-Value and Sand Equivalent testing on samples of subgrade materials obtained from the referenced street in order to provide recommended structural pavement sections for Salk Avenue between Stations 7+50 to 27+50 in the Fox Miller Property (C.T. 00-20) in Carlsbad, California. The surface samples were collected at our discretion at approximately 300 foot spacing based on observed soil conditions. Results of the R-Value and Sand Equivalent tests are summarized on Table I below. 6960 Flanders Drive • San Diego, California 92121-2974 0 Telephone (858) 558-6900 0 Fax (858) 558.6159 TABLE I SUMMARY OF R-VALUE AND SAND EQUIVALENT TEST RESULTS Sample Number Sample Location/Represents R-Value Sand Equivalent R-3 Salk Avenue 7+50 to 10+50 16 13 R-4 Salk Avenue 10+50 to 13+50 10 12 R-5 Salk Avenue 13+50 to 16+50 17 17 R-6 Salk Avenue 16+50 to 19+50 17 16 R-7 Salk Avenue 19+50 to 22+50 18 13 R-8 Salk Avenue 22+50 to 25+50 18 15 R-9 Salk Avenue 25+50 to 27+50 17 16 Calculations to determine pavement section recommendations utilized the R-Values above and a Design by the project civil engineer. Design procedures provided by the California Department of Transportation Highway Design Manual, Section 608.4, and the City of Carlsbad Minimum Structural Standard GS-17 were utilized to calculate the structural pavement sections. Based upon these criteria, we have calculated the following pavement sections shown on Table II. TABLE II RECOMMENDED STRUCTURAL PAVEMENT SECTION Street Name and Station Design R-Value Asphalt Concrete (inches) Class 2 Base (inches) Salk Avenue 7+50 to 10+50 16 4.0 15 Salk Avenue 10+50 to 13+50 10 4.0 16.5 Salk Avenue 13+50 to 16+50 17 4.0 14.5 Salk Avenue 16+50 to 19+50 17 4.0 14.5 Salk Avenue 19+50to22+50 18 4.0 14.5 Salk Avenue 22+50 to 25+50 18 4.0 14.5 Salk Avenue 25+50 to 27+50 17 4.0 14.5 Prior to placing aggregate base materials, the subgrade should be scarified to a depth of at least 12 inches; moisture conditioned and compacted to at least 95 percent of relative compaction. Base materials should also be compacted to at least 95 percent of relative compaction. Class 2 aggregate base should conform to Section 26-1.02A of the Standard Specifications of the Stale of California, Department of Transportation (Caltrans). Asphalt concrete should conform to Section 203-6 of the Standard Specifications for Public Works Construction (Greenbook). Asphalt concrete should be compacted to at least 95 percent of Hveem maximum density. Approved structural pavement sections will be provided by the City of Carlsbad. Copies of this letter, including pavement section calculations and the R-Value and Sand Equivalent data sheets are being Project No. 07238-42-03 - 2 - - May 23, 2006 provided to the City of Carlsbad Public Works Department for their review and subsequent pavement section determination. Should you have questions regarding this letter, or if we may be of further service, please contact us at your convenience. Very truly yours, GEOCON INCORPORATED Idn y . Mikesell GE25 3 ----- No.2533 EXP. c EXP.O6m ))) ly F. Rzonca CEG 1191 RCM:GFR:anh Enclosures: R-Value Data Sheets Sand Equivalent Sheets (2) Addressee (2) J. T. Kruer & Company Attention: Mr. Chuck Knight (2/del) J. T. Kruer & Company, Jobsite Trailer Attention: Mr. Chuck Sanfilippo Project No. 07238-42-03 - 3 - May 23, FIGURE 1 PAVEMENT SECTION CALCULATIONS FOX MILLER PROPERTY, CARLSBAD, CALIFORNIA Salk Avenue 7+50 to 10+50 Use subgrade R-Value = 16.0 Traffic Index (TI) = 7.5 Methodology = CALTRANS Highway Design Manual Section 608.4 GE for AC = (0.0032)( 7.5)(100-78.0) = .53 feet from Table 608.413 Highway Design Manual GE = .53 feet for AC yields actual thickness = 3.15 inches Use AC thickness = 4.0 inches GE for AC thickness used = .67 feet GE for base = (0.0032)( 7.5)(100-16.0) - .67 = 1.35 feet from Table 608.413 Highway Design Manual with GF for Class 2 base = 1 .1 Base thickness = 14.68 inches Use base thickness = 15 inches Design Street Structural Section Asphalt Concrete Thickness = 4.0 inches. Class 2 Aggregate Base Thickness = 15 inches. Salk Avenue 10+50 to 13+50 Use subgrade R-Value = 10.0 Traffic Index (TI) = 7.5 Methodology = CALTRANS Highway Design Manual Section 608.4 GE for AC = (0.0032)( 7.5)(100-78.0) = .53 feet from Table 608.413 Highway Design Manual GE = .53 feet for AC yields actual thickness = 3.15 inches Use AC thickness = 4.0 inches GE for AC thickness used = .67 feet GE for base = (0.0032)( 7.5)(100-10.0) - .67 = 1.49 feet from Table 608.413 Highway Design Manual with GF for Class 2 base = 1 .1 Base thickness = 16.25 inches Use base thickness = 16.5 inches Design Street Structural Section Asphalt Concrete Thickness = 4.0 inches. Class 2 Aggregate Base Thickness = 16.5 inches. Project No. 07238-42-03 May 23, 2006 FIGURE 1 (Continued) PAVEMENT SECTION CALCULATIONS FOX MILLER PROPERTY, CARLSBAD, CALIFORNIA Salk Avenue 13+50 to 16+50, 16+50 to 19+50, and 25+50 to 27+50. Use subgrade R-Value = 17.0 Traffic Index (TI) = 7.5 Methodology = CALTRANS Highway Design Manual Section 608.4 GE for AC = (0.0032)( 7.5)(100-78.0) = .53 feet from Table 608.4B Highway Design Manual GE = .53 feet for AC yields actual thickness = 3.15 inches Use AC thickness = 4.0 inches GE for AC thickness used = .67 feet GE for base = (0.0032)( 7.5)(100717.0) - .67 = 1.32 feet from Table 608.4B Highway Design Manual with GF for Class 2 base = 1 .1 Base thickness = 14.42 inches Use base thickness = 14.5 inches Design Street Structural Section Asphalt Concrete Thickness = 4.0 inches. Class 2 Aggregate Base Thickness = 14.5 inches. Salk Avenue 19+50 to 22+50 and 22+50 to 25+50 Use subgrade R-Value = 18.0 Traffic Index (TI) = 7.5 Methodology = CALTRANS Highway Design Manual Section 608.4 GE for AC = (0.0032)( 7.5)(100-78.0) = .53 feet from Table 608.4B Highway Design Manual GE = .53 feet for AC yields actual thickness = 3.15 inches Use AC thickness = 4.0 inches GE for AC thickness used = .67 feet GE for base = (0.0032)( 7.5)(100-18.0) - .67 = 1.30 feet from Table 608.4B Highway Design Manual with GF for Class 2 base = 1 .1 Base thickness = 14.16 inches Use base thickness = 14.0 inches Design Street Structural Section Asphalt Concrete Thickness = 4.0 inches. Class 2 Aggregate Base Thickness = 14.0 inches. Project No. 07238-42-03 May 23, 2006 Exudation Pressure '2O(5 Exudation PSI ; O Stability Ph 12 Turns Displacement R-Value ) 5 Corrected R-Value ,( S Thick by Stab./Foot Expansion Reading Thick/Exp. Press/Foot Moisture Content Dry Density I ioo w 50 40 80 70 60 30 20 10 0 800 --- -- -- ------ ---------------- __pp___ ------ - ---------- --- --------------- -------------- ---- ------ ------ -------------- --------------- ------- ------ KAI --- ,-,—=— -----__ d= turn displacement Ph= reading at 2000 R=100- ' 100 (2.51d)[(160/Ph-1)+1 R-Value by Expansion 3'7 70 600 50 400 300 200 100 0 R-Value by Exudation /7 .!!IPRESSURE(PSI) H R-Value by Equilibrium- V - I,LO Ti /,(/- ri )D\ IS z5 . I SAMPLE DESCRIPTION: ' Stab/ft. 2 1.5 1 3/4,, 3/8" #4 Tot Wt. Ret. I % Ret. IBatch Wt. I % Used I Batch GEOCON 0 R - Value Data Sheet. Project Name ) I Project No ' Location / - ., 2 4 Sample No Mold Wet Wt Dry Wt .1 Batch Weight - -. . Humidifying Moisture - % Moist: IOZ Moisture Added LL. T2 Setup By Date 7( Soil 'rMold Is 7l9 Mold "7T-4 '$ ' 'i -T/ Camp By Stab, By: Date: Caic By Date Soil f) /O /O Foot P1 )'D 2L? Heigof Sample GEOCON- 0 R Value Data Sheet Project Name: Project No.: 7' 8 .- Location: SmnlNn DLJ Mold I Wet Wt: Dry Wt: J % Moist i 3 Set up By 'Date -" Corn By: Stab, Pj Date3/ /O Calc. By: Date: Wt. Ret. Ret. Batch Wt. % used Batch 3133 3ZD0 Batch Weight Humidifying MOisture 4 £'.,: Moisture Aded /O I %Z SoihMold Mold WPII Z11 Soil Ø // h7c L Foot PSI ( S 100 70 _____ ______ Height of Sample Z ,5-R- Z.53 1.55 Exudation Pressure ,005 70 Exudation PSI 9 O 50 Stability Ph Turns Displacement :; R-Value P-I L) Corrected R-Value #4 L Thick by Stab /Foot ? •Z Tot ?1' \S Expansion Reading L I, 7j2, Thick/Exp. Press/Foot I - / .'- SAMPLE DESCRIPTION L Moisture Content A~o Dry Density " ' "- - 100 70 50 50 40 20 1: Stab/ft. 215 1 05 0 __-_.______ 07ij, 0.5 . ±1 I — - IIII1LII.JIIIIIlI}IIH E EE = H± :LIJ:i J: 15 EE EEE EEE E Z,11 ILL LL IJ I _i_30. EIEIEE EE JLL 2 = d= turn displacement Ph= reading at 2000 LjH 800 700 600 506 400 300 200 100 0 EXUDATION PRESSURE (PSI) -- ---------J r' t. R.-Value by Exudation R-Value by Equilibrium GEOCON INC,OR P0 R A T ED Project Name: 0 R - Value Data Sheet Project No. :'7 - - - - I k I fJ L %laULILJII._.jq\ /•8 f rfr ( L./b.QdUlpI INU. Mold V ) I PL Wet Wt: Dry Wt: % Moist 7 l' Setup Date Comp By 7'e G Stab. By: Datej Caic. By: Date: ___________ ______ ______ _____ ______ Wt Ret % Ret Batch Wt.. %Used Batch Batch Weight n012 12,64) Humidifying Moisture Lj i7 4'i3 Moisture Added Soil -r Mold '1'! Mold ((2 1 2 2f( Soil ik /OS __- Foot PSI 1U& Height of Sample Exudation Pressure 7 XL) :•C() (:) ______ ______ Exudation PSI -/() Stability Ph Turns Displacement L( 0°) 3/4" R-Value 2?_ .1 S Corrected R-Value 2 -'a_ lb Thick by Stab/Foot _____ h ç•- L12\ _____ ______ Tot 1 71-73 Expansion Reading Thick/Exp. Press/Foot (Z) (0C 27 SAMPLE DESCRIPTION: Moisture Content 2.J17: ,2,, ..• Oy <c7-- / Dry Density 100 80 70 60 w 50 10 Stab/ft 2 1.5\_1 0.5 0 1!IIiJ 05 77 CL 15 :: d= turn displacement Ph= reading at 2000 R10.0- 100 (2.5/d)[(160/Ph-1]+-1 PVIiit h, Fwn nn I 20 -i-.i - ____ --1- _____ _____ -H--- —j----- ---- GEOCON 0 IN CO HP ORATE D Project Name: \-ox I '1ft.(- Project No.: G/l-° Location: 1\ i\-\re.- 1-oo Sample No. R-Value Data Sheet Mold Wet Wt: 56o . Dry Wt: 4( % Moist: Setup By: C Date: 5//oI Comp By Stab. By: tC} Date: SI,2I Caic. By: Date: Wt. Ret. Ret. Batch WI_1%_Used Batch Batch Weight 1-0 -" l )_ Humidifying Moisture 'I3 Moisture Added ' I 20 - , L( 'I Soil + Mold Mold 2 /71 /(. '71)7 Soil /od7f 'C?D Foot PSl ig 7i Height of Sample 7 Z Exudation Pressure Exudation PSI { Stability Ph 1% i" /6' Turns Displacement '-f.i.3 I(4 JO 3/4" ? 0.7 R-Value fc, 3/8' 417 P 77 75 Corrected R-Value (7 / 7 —j #4 / . / ...! f.. / Thick by Stab./Foot Tot 33 Expansion Reading Thick/Exp. Press/Foot SAMPLE DESCRIPTION: f\L- 64iJ Moisture Content '- _______ _______ _______ (S ' - " -'&i•e c' Dry Density 100 80 70 5 40 20 10 0 - Stab/ft. 2 1.5 1 0.5 0 - - - - - - EFEE 'El !E11 0.5 'I 60 CL 0 2 EE ____ d= turn displacement Ph= reading at 2000 R=100- 100 (2 5/d)[(160/P1 ]1 R_VnItip 1w Ernnsinn —H -- ___ GEOCON O-w R -Value Data Sheet Project Name:ty rLL:*<. Project No.:. - nrtin Jz: ' Sample No. Q7 Mold . .Wt: Dry Wt L( d % Moist: ..:... Set up By: Stab. 0-iC)-' Date: V Cac. By: Date: ___________ Batch Weight Wet Humidifying Moisture - L Moisture Added 10 2,-j ,.o I C Soil + Mold Mold '7O ?IZO.7 7 'j7"/ Soil I't /! Foot PSI PSi . < 2O I Height of Sample 2'I Y?D Exudatibn Pressure 4(3 ç/') ______ ______ Exudation PSI 17 o 7.72. 'i'-iO - Wt. Ret. % Ret. Batch Wt. % Used Batch Stability Ph N I.. Ui', ._L. \1 Turns Displacement '-i. JO V 3/4 R-Value (7 7 (9 3/8" -.3 Corrected R-Value 7 #4 *VV• .D ______ C. :. _____ Thick by Stab/Foot (9 12,Z Tot .. Expansion Reading L4 Thick/Exp. Press/Foot 37 I 3 .7 SAMPLE DESCRIPTION Moisture Content 7Lf2 Dry Density 97. 70 60 50 4 :: 20 10 — Stab/ft 2 1.5 1 0.5 0 100 ._______ - - i 90 80 0.5 TFL I - — - lei I rT = = — — — EEEEEEEEEEEEEEEE :T::: --L+4--1 ----- __ EEEEEEEEEEEE EEEEEE EW : 1.5 A U I d= turn displacement Ph= reading at 2000 R=100- 100 (2.5/d)[(160/Ph-1 +1 R-Vlue by Exoansion 221 iT = - - --- - - - ___ ___ ___ ___ 800 700 600 500. 400 1300 ., 00 100 0 RLVaIue by Exudation EXUDATION PRESSURE (PSI) R-Value by Equilibrium d= turn displacement Ph= reading at 2000 R100- 100 (2.5/d)[(160/Ph-1A+1 R-Value by Expansion R-Value by Exudation R-Value by Equilibrium L GEOCON INCORPORATEr)0 Project Name: / R Value Data Sheet Project No.: - Location: cAt iC A Sample Mold Wet Wt: C. Dry Wt: -Lc/ % Moist: /)) Batch Weight . Humidifying Moisture Moisture Added .. 7>' Soil + Mold ."q r Moid:.. Soil /c /102. I /(C{ Foot PSI Height of Sample Set up By: Date: Stab, By: (,,U Cu Date: Caic. By: Date: Exudation Pressure Wt. Ret. % Ret. Batch Wt. % Used Batch Exudation PSI SZ3 7/ . Stability Ph jQ' j'2 -.\ Turns Displacement 14.3i { .71,) ', R-Value 'Z.'- (C 3'8" cH Corrected R-Value It #4 Thick by Stab/Foot iiO7 •hii"?.9 /it 5 Tot Expansion Reading Thick/Exp. Press/Foot 27 LI 7 SAMPLE DESCRIPTION: Moisture Content Dry Density Stablft 2 1.5 1 0.5 0 90 80 70 60 UJ 50 > : 40 30 20 10 __ 0 t 800 700 600 500 400 300 200 EXUDATION PRESSURE (PSI) 100 ------ ----w---------- --- - --------— ------ --------------- --------------- ---------- ---- ----- --------------- --------- ------ ------ -------==---- ===----. ____ L. ---=--==— I 100 0 GEOCON INCORPORATED 0-v R -Value Data Sheet ProjectName: g&7c. /7tie— ProjectNo.: - L2 - 412 Location: 61 /( i/r. 2_ i .Samle No. Mold Wet Wt Dry Wt: % Moist: 7, Set up By fV) IK Date Comp By: Lu Stab. By: Date:.j1 Caic. By: Date: Wt. Ret. % Ret. Batch Wt. % Used Batch 7204-5 - Batch Weight 12-6'0 jZo ,' 2 i2V (Z Humidifying Moisture &)C > Moisture Added T (O 1' Soil +Mold Mold Soil 'Ot IC 'f Foot PSI Height of Sample Exudation Pressure LU.XO :OC Exudation PSI / 0 Stability Ph 17-1 1 6, I DS Turns Displacement 'l , 'O &4. O 3,-7 1 3/4 R-Value .. 3/8" Corrected R-Value 16 ) #4 . Thick by Stab/Foot I, Ii lO Tot Expansion Reading Thick/Exp. Press/Foot (D C.7 I 2..) SAMPLE DESCRIPTION: /11 I' 02YK Oi - Moisture Content 2-LL 2.Z ?) Dry Density (c2 ?,a )f(c .': ' 100 go 80 70 CC Stab/ft- 2 1.5 1 0.5 0 LI L_LL - r------- - - - - - 05 I J .1A I I - - 60--.—_ ---., 1 J1i — 50__ - LL 15 40 30 t I d= turn displacement Ph= reading at 2000 R=10.0- 100 / (2.5/d)[(160/Ph-1J+1 RX2111P h, Fyrncinn 20 — - - — —l--- - -r--- -.- —H tO 0 . 800 700 600 500 400 boo EXUDATION PRESSURE (PSI) 200 100 0 .7 r' R- Value byExudátion 1. R-Value by Equilibrium L'GEOCON INCORPORATED JOG NAME' foi Hiter FILE NO /2j -/2 -o3 / DATE ____ SAND EQUIVALENT TEST. cq SAMPLE NUMBER POINT NUMBER 1 2 1. 2 1 2 .1 2 1 2 1 2 STAnr 0 2. 4 6 8 10 SHAKE 10 12 12 14 16 18 20 SET DOW11 14 16 36 1i 18 20 22 32 34 38 40 42 A. CLAY hEIGhT 21 /; )z,7 / 12 12 6, I2(7 145 121 S7 J2(( 12 U. SAND HEIGHT ) // 22._. C. SAND EQUIVALENT (DiA) H' i5 1G /5 SAND EQUIVALENT (AVG. c) / - V SAMPLE DESCI1IPTION -' h. Th- .- - -S I / LGEP.CON INCORPORATED J FILE 140 DATE_. SAND EQUIVALENT JEST. SAMPLE NUMBER . POINT NUMBER 1 2 1 . 2 1 2 1 2 1 2 1 2 SfAnf 0 2. 4 6 8 .10 10 12 14 16 18 18 20 SET DOW11 12 14 .16 20 40 22 42 FIEAD 32 34 36 38 CLAY HEIGHT jg /47 SAND HEIGHT . c SAND EQUIVALENT (hA) - SAND EQUIVALENT (AVG.C) SAMPLE DESCRIPTION