perencanaan tebal perkerasan aashto

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  • Perencanaan Tebal PerkerasanMETODE AASHTO

  • METODE AASHTORumus umum:

    Log Wt18 = 9.36 log (SN+1)-0.20+Gt/(0.40+(1094/(SN+1)5.19)) +log (1/R) + 0.372(Si-3)

    Dimana: Wt18 = beban lalin selama UR atas dasar beban 18 kips yang diperhitungkan terhadap faktor regional Gt = log (4.2-Pt)/(4.2-1.5) Si = soil support (korelasi CBR) (Bina Marga = DDT)R = faktor regional (Bina Marga = FR)SN = structural number (Bina Marga = ITP)

  • Soil SupportPunya korelasi dengan CBRsubgradeGunakan GrafikCBR skala log Si skala linear

  • Regional FactorRoadbed material frozen to depth of 0.2 to 1.0 5 (130 mm) or moreRoadbed material dry, summer and fall 0.3 to 1.5Roadbed material wet, spring thaw 4.0 to 5.0

  • Percentage of Vehicle Concentration (C)Percentage that commercial vehicle were of total traffic both lanePassenger cars in left laneCommercial vehicle in left lane

  • Structural Layer Coefficients

    Sheet1

    512

    536

    23900

    1453210

    279420

    106630

    43840

    41050

    31260

    01470

    1680

    91890

    33720100

    39622110

    457456.923076923124120

    81526130

    3421528140

    24330150

    173173.012048192832160

    7171.009771987962140034170

    96.983238270436180

    0

    1

    0

    2663

    2844302

    Sheet1

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    0

    Total Volume in One Direction-hundreds of vehicle/hour

    C (%)

    Sheet2

    Pavement ComponentCoefficient (ai)

    SURFACE COURSE

    - Road Mix (Campuran di jalan), low stability0.20

    - Plant Mix (AMP), high stability0.44

    - Sand asphalt0.40

    BASE COURSE

    - Sandy gravel0.07

    - Crushed stone0.14

    - Cement treated base0.15-0.23

    - Bitumeous Treated (ATB&ATBL)

    a. coarse graded0.34

    b. sand asphalt0.30

    - Lime treated (campuran kapur & batu)0.15-0.30

    SUB BASE

    - Sandy gravel0.11

    - Sand or sandy clay0.05-0.10

    Sheet3

  • Contoh:Perhitungan EDFdari data Loadometer

    Sheet1

    AwalKodeIterasi 1Iterasi 1Iterasi 1Iterasi 1

    Si33333

    Pt2.52.52.52.52.5

    R11111

    SN346.846.985.5

    9.36*log(SN+1)5.635282A6.5423598.3707988.4427477.608869

    -0.2B-0.2-0.2-0.2-0.2

    GT=log((4.2-Pt)/(4.2-1.5))-0.200915-0.200915-0.200915-0.200915-0.200915

    GT/(0.4+(1094/((SN+1)^5.19)))-0.164554C-0.305412-0.472768-0.475219-0.431084

    log 1/R0D0000

    0.372(Si-3)0E0000

    log WT186.986.986.986.986.98

    A+B+C+D+E5.276.047.77.776.98

    Selisih1.710.94-0.72-0.790.00

    Keteranganinput SN lagiinput SN lagiinput SN lagiinput SN lagioke

    Sheet2

    Axle Load Group (lbs)Representative Axle Load, LbsEquiv. FactorNo. Of AxlesEquiv. 18 kip Single Axles

    single axles

    under 300020000.00035120.2

    3000-699950000.0125366.4

    7000-799975000.042523910.2

    8000-11999100000.121453174.4

    12000-159991400000.4279111.6

    16000-18000170000.82510687.5

    18001-20000190001.2454353.5

    20001-21999210001.8347.3

    22000-23999230002.6337.9

    24000 and over00.0

    Sub total458.9

    tandem axles

    under 600040000.00190.0

    6000-1199990000.0083372.7

    12000-17999150000.05539621.8

    18000-23499210000.19545789.1

    24000-24999270000.485815395.3

    30000-32000310000.785342268.5

    32001-33999330001243243.0

    34000-35999350001.245173215.4

    36000-37999370001.53571109.0

    38000-39999390001.875916.9

    40000-41999410002.27500.0

    42000-43999430002.7412.7

    44000 and over00.0

    Sub total1364.3

    Total1823.2

    Total all trucks =3146

    Pt = 2.5SN = 3

    Rata2 per truck= 1823.2/3146 = (0)0.5795295613(18 kip beban sumbu)

    ADT awal =(1)4000kend/hari

    ADT 20 th =(2)6000kend/hari

    persen truk =(3)20%dari ADT

    ADT rata2 =(4)5000kend/hari

    UR 20 th

    ADT perlajur =[ (1)+(2) ] / 2 = (5)2500kend/hari

    ADTT rata2 =(5) / 2 = (6)500kend/hari

    Jumlah truk =(6) * 365 * 20 = (7)3,650,000truk

    selama 20 th

    Jumlah EDF =(7) * (0)2,115,282.9018 kip beban sb standar

    Sheet3

  • Contoh:Perhitungan EDFdari data Loadometer

    Sheet1

    AwalKodeIterasi 1Iterasi 1Iterasi 1Iterasi 1

    Si33333

    Pt2.52.52.52.52.5

    R11111

    SN346.846.985.5

    9.36*log(SN+1)5.635282A6.5423598.3707988.4427477.608869

    -0.2B-0.2-0.2-0.2-0.2

    GT=log((4.2-Pt)/(4.2-1.5))-0.200915-0.200915-0.200915-0.200915-0.200915

    GT/(0.4+(1094/((SN+1)^5.19)))-0.164554C-0.305412-0.472768-0.475219-0.431084

    log 1/R0D0000

    0.372(Si-3)0E0000

    log WT186.986.986.986.986.98

    A+B+C+D+E5.276.047.77.776.98

    Selisih1.710.94-0.72-0.790.00

    Keteranganinput SN lagiinput SN lagiinput SN lagiinput SN lagioke

    Sheet2

    Axle Load Group (lbs)Representative Axle Load, LbsEquiv. FactorNo. Of AxlesEquiv. 18 kip Single Axles

    single axles

    under 300020000.00035120.2

    3000-699950000.0125366.4

    7000-799975000.042523910.2

    8000-11999100000.121453174.4

    12000-159991400000.4279111.6

    16000-18000170000.82510687.5

    18001-20000190001.2454353.5

    20001-21999210001.8347.3

    22000-23999230002.6337.9

    24000 and over00.0

    Sub total458.9

    tandem axles

    under 600040000.00190.0

    6000-1199990000.0083372.7

    12000-17999150000.05539621.8

    18000-23499210000.19545789.1

    24000-24999270000.485815395.3

    30000-32000310000.785342268.5

    32001-33999330001243243.0

    34000-35999350001.245173215.4

    36000-37999370001.53571109.0

    38000-39999390001.875916.9

    40000-41999410002.27500.0

    42000-43999430002.7412.7

    44000 and over00.0

    Sub total1364.3

    Total1823.2

    Total all trucks =3146

    Pt = 2.5SN = 3

    Rata2 per truck= 1823.2/3146 = (0)0.5795295613(18 kip beban sumbu)

    ADT awal =(1)4000kend/hari

    ADT 20 th =(2)6000kend/hari

    persen truk =(3)20%dari ADT

    ADT rata2 =[ (1)+(2) ] / 2 = (4)5000kend/hari

    UR 20 th

    ADT perlajur =(4) / 2 = (5)2500kend/hari

    ADTT rata2 =500kend/hari

    Jumlah truk =(6) * 365 * 20 = (7)3,650,000truk

    selama 20 th

    Jumlah EAL =(7) * (0)2,115,282.9018 kip beban sb standar

    Sheet3

  • Contoh:Perhitungan Tebal Perkerasan Cara AASHTO

    Sheet1

    AwalKodeIterasi 1Iterasi 1Iterasi 1Iterasi 1

    Si33333

    Pt2.52.52.52.52.5

    R11111

    SN346.846.985.5

    9.36*log(SN+1)5.635282A6.5423598.3707988.4427477.608869

    -0.2B-0.2-0.2-0.2-0.2

    GT=log((4.2-Pt)/(4.2-1.5))-0.200915-0.200915-0.200915-0.200915-0.200915

    GT/(0.4+(1094/((SN+1)^5.19)))-0.164554C-0.305412-0.472768-0.475219-0.431084

    log 1/R0D0000

    0.372(Si-3)0E0000

    log WT186.986.986.986.986.98

    A+B+C+D+E5.276.047.77.776.98

    Selisih1.710.94-0.72-0.790.00

    Keteranganinput SN lagiinput SN lagiinput SN lagiinput SN lagioke

    Sheet2

    Axle Load Group (lbs)Representative Axle Load, LbsEquiv. FactorNo. Of AxlesEquiv. 18 kip Single Axles

    single axles

    under 300020000.00035120.2

    3000-699950000.0125366.4

    7000-799975000.042523910.2

    8000-11999100000.121453174.4

    12000-159991400000.4279111.6

    16000-18000170000.82510687.5

    18001-20000190001.2454353.5

    20001-21999210001.8347.3

    22000-23999230002.6337.9

    24000 and over00.0

    Sub total458.9

    tandem axles

    under 600040000.00190.0

    6000-1199990000.0083372.7

    12000-17999150000.05539621.8

    18000-23499210000.19545789.1

    24000-24999270000.485815395.3

    30000-32000310000.785342268.5

    32001-33999330001243243.0

    34000-35999350001.245173215.4

    36000-37999370001.53571109.0

    38000-39999390001.875916.9

    40000-41999410002.27500.0

    42000-43999430002.7412.7

    44000 and over00.0

    Sub total1364.3

    Total1823.2

    Total all trucks =3146

    Pt = 2.5SN = 3

    Rata2 per truck= 1823.2/3146 = (0)0.5795295613(18 kip beban sumbu)

    ADT awal =(1)4000kend/hari

    ADT 20 th =(2)6000kend/hari

    persen truk =(3)20%dari ADT

    ADT rata2 =(4)5000kend/hari

    UR 20 th

    ADT perlajur =[ (1)+(2) ] / 2 = (5)2500kend/hari

    ADTT rata2 =(5) / 2 = (6)500kend/hari

    Jumlah truk =(6) * 365 * 20 = (7)3,650,000truk

    selama 20 th

    Jumlah EAL =(7) * (0)2,115,282.9018 kip beban sb standar

    Sheet3

    - 4/2D Highway

    - UR = 20 th

    - ADT awal =18608vehicle

    - Jumlah truk =14%ADT

    - Pertumbuhan =2%

    - Fakt. Reg =1

    - Data Traffic

    - Asumsi SN Awal =3

    Axle load groupsRepresentative axle loadEquivelent factorNo. of axles per 1000 trucksEquivalent 18 kip single axle per 1000 trucks

    single axles

    under 320.0003426.80.13

    3-750.012669.68.04

    7-87.50.0425228.29.70

    8-12100.12678.881.46

    16-18140.4230.992.36

    28-30296.920.191.31

    Total551.30

    tandem axles

    under 640.0010.380.00

    6-1290.0081691.35

    12-18150.055153.68.45

    18-24210.195139.427.18

    24-30270.48519192.64

    30-32310.79555.343.96

    52-54596.250.191.19

    Total365.41

    EAL 18 kip =551.3 + 365.41 =916.71per 1000 truck

    Dari perhitungan ADT

    i = 0.02 ; n = 20 th

    Design ADT = 1/n (ADT) [(1+i)^n - 1]/(ln (1+i))

    =1/20 (18608) [(1+2%)^20 - 1]/(ln (1+2%))

    =22832kendaraan

    Design ADT per arah11416kendaraan/hari

    Jumlah kendaraan per jam untuk satu arah =476kend/jam

    (Vph)-->90 % (lihat gambar 1)

    ADTT =1598trucks

    ADTT pada lajur rencana =1438kend.

    EAL =1438*916.71/1000 =1319

    EAL UR 20 th

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