Name of work Construction of Main Road Radha Sawami Satsang

Bhawan to college road at Giani Gail Singh Nagar, Client

: Improvement Trust, Roopnagar

Carriageway width Two lane

Classification of road MDR

Design life 15

Initial traffic (A) (in both

direction) (CVD)

250

Traffic growth rate 5

Year of traffic census 2015

Terrain Plain

Current year 2015

Construction period 1

Yes

7.29,7.78,4.38,4.5

80th Percentile CBR 4.47

Whether subgrade to be

replace with borrow material

No

CBR of select sub grade (borrow

material)

Whether stage construction

involved

No

If yes, life of bituminous layers

Grade of Bitumen for wearing

course and binder course

VG30

Flexible Pavement Design - Base Data

CBR Values of subgrade used for

calculcation of 80th Percentile

CBR Calcuation

TNHD_Pave_V 3.1 1/6 Released in - Jul.2015

Flexible Pavement Design - Base DataInitial Traffic after completion of

construction

=250x(1+5%)^(2015-2015+1)x1

263 CVD

Whether Axle Load Survey

conducted?

No

If yes, VDF value from Axle Load

Survey

0

Vehicle Damage Factor used for

design traffic

3.5

Lane Distribution Factor 0.5

Design Traffic =365 * ( (1+r)^n - 1) * A * D * F )/ r

For 15 Years =365x263x((1+0.05)^15-1)x0.5x3.5/0.05/1000000

3.63 MSa

For 5 Years =365x263x((1+0.05)^5-1)x0.5x3.5/0.05/1000000

0.93 MSa

% volume of air voids (Va) to be

adopted in DBM

4.5

% volume of bitumen (Vb) to be

adopted in DBM

11.5

Type of Binder Course Adopted DBM

Stage construction can be

adopted

Rate of DBM used for cost

analysis

Note:

Stage construction can be adopted

TNHD_Pave_V 3.1 2/6 Released in - Jul.2015

Entered CBR Values

90 4.42525979

90 4.42525979 4.42525979 90

80 4.473886067

80 4.473886067 4.473886067 80

Equation of the CBR graph is y = -23.922x3 + 455.34x2 - 2836.9x + 5800.2

a b c d

-23.922 +455.34 -2836.9 + 5800.2

90.00000435

79.99998537

CBR values for 90 80

4.43 4.47

80th and 90th percentile CBR values

CBR ---->

7.29,7.78,4.38,4.5

Pe

rce

nti

le -

--->

y = -23.922x3 + 455.34x2 - 2836.9x + 5800.2

-20

0

20

40

60

80

100

120

0 1 2 3 4 5 6 7 8 9

TNHD_Pave_V 3.1 3 of 6 Released in - Jul.2015

CBR = 4.47

Poisons ratio for cemented layers 0.25

Poisons ratio for all the other layers 0.35

Assumed Layer thickness for 1.Granular Base and Granular Subbase

BC = 40 100 Thickness of BC & DBM

DBM = 60

WMM = 225 475 Thickness of GSB + WMM

GSB = 250

575

MSA 3.63 Bitumen layer IITPAVE to be run for 3 layer analysis

3.63 Granular layer

5 Yrs = 0.93

10 Yrs = 2.11

15yrs = 3.63

Resilient modulus (M)

M Subgrade = 10*CBR For CBR <= 5

= 17.6*(CBR) 0.64 For CBR > 5

M Subgrade = 44.70

M Granular = 0.2 x E subgrade x h^0.45

= 143.169215

M Granular = 143

DBM

For BM

2300 VG10 Temp 20oC

500 2000 VG10 Temp 25oC

M Bitumen = 1700 700 1700 VG30 Temp 35oC

3000 VG40 Temp 35oC

MR of Bituminous layers

Table 7.1 of IRC 37-2012 (For DBM)

Design of flexible pavement - strain checkConstruction of Main Road Radha Sawami Satsang Bhawan to college road at Giani Gail Singh Nagar,

Client : Improvement Trust, Roopnagar

Allowable Strain Calculation

TNHD_Pave_V 3.1 46 Released in - Jul. 2015

Horizontal Tensile Strain at the bottom of the bituminous layers

Calculation of Tensile strain

Nf = 2.21 x 10^ - 4 x {1/εt}^3.89 x [1/MR]^0.854 for 80 % reliability

Nf = 0.5161 x C x 10^ - 4 x {1/εt}^3.89 x [1/MR]^0.854 for 90 % reliability

Where C = 10^M, M=(4.84x (Vb /(Va+Vb)-0.69))

Va = 4.5 Vb = 11.5

1/εt = 2164.21393 #VALUE!

εt = 462.06E-06 Allowable Tensile strain

εtHorizontal Tensile Strain at the bottom of the cemented base

N = RF x [ (113000/E0.804+191) / εt ]12 RF = 1 if >1500 CVD and 2 if <1500 CVD

N = N/A

1/εt = N/A

εt = N/A in microstrain

εt = 000.00E+00 Allowable Tensile strain

Vertical Compresive Strain at the bottom of the Granular sub base

Calculation of Vertical strain

N = 4.1656*10^-8*(1/εv)^4.5337 for 80 % reliability

N = 1.41*10^-8*(1/εv)^4.5337 for 90 % reliability

1/εv = (3630000/(4.1656*10^-8))^(1/4.5337)

1/εv = 1187.96004

εv = 841.78E-06 Allowable Vertical strain

Allowable Actual

Tensile strain at the bottom of bituminous layers 462 micro Strain 414 micro Strain

0 micro Strain 0 micro Strain

Vertical compressive strain at the top of Sub grade 842 micro Strain 580 micro Strain

The selected section is safe

Comparison of allowable strain with actual strain(from IITPAVE)

Not Applicable

Values given below are micro strain

TNHD_Pave_V 3.1 56 Released in - Jul. 2015

IITPAVE Result

No. of layers 3

E values (MPa) 1700.00 143.00 44.70

Mu values 0.350.350.35

thicknesses (mm) 100.00 475.00

single wheel load (N) 20500.00

tyre pressure (MPa) 0.56

Dual Wheel

Z R SigmaZ SigmaT SigmaR TaoRZ DispZ epZ epT epR

100.00 0.00-0.1890E 0.8840E 0.7053E0.1904E-01 0.7266E0.4384E-03 0.4137E-03 0.2718E-03

100.00L 0.00-0.1890E0.1883E-01-0.3386E-01-0.1904E-01 0.7266E0.1192E-02 0.4137E-03 0.2718E-03

100.00 155.00-0.1458E 0.6476E 0.8231E-01-0.8489E-01 0.7381E0.2360E-03 0.3940E-03-0.5490E-04

100.00L 155.00-0.1458E0.1743E-01-0.6498E-01-0.8489E-01 0.7381E0.8179E-03 0.3940E-03-0.5490E-04

575.00 0.00-0.2273E-01 0.3446E-01 0.2935E-01-0.3893E-02 0.4723E0.3151E-03 0.2248E-03 0.1765E-03

575.00L 0.00-0.2284E-01 0.2324E-02 0.7949E-03-0.3893E-02 0.4723E0.5354E-03 0.2246E-03 0.1784E-03

575.00 155.00-0.2454E-01 0.3690E-01 0.3379E-01-0.5199E-02 0.4856E0.3446E-03 0.2354E-03 0.2060E-03

575.00L 155.00-0.2454E-01 0.2453E-02 0.1479E-02-0.5200E-02 0.4856E0.5797E-03 0.2354E-03 0.2060E-03

6/6 output from iitpave