R/W 15-33 Rehabilitation. Pavement Condition North 3000 feet North 8000 feet.

R/W 15-33 Rehabilitation

Pavement Condition

North 3000 feet

North 8000 feet

NDT

Deflection Data•Basin Area•LTE•Effective slab thickness•Interlayer properties•Subgrade support

y = 0.0002x2 + 0.0052x + 0.0036R2 = 0.9988

0

0.5

1

1.5

2

2.5

3

0 20 40 60 80 100 120

RRS (in)

d

2kd

P

y = 0.0284x2 - 0.2891x + 0.992R2 = 0.9866

0

20

40

60

80

100

120

0 10 20 30 40 50 60 70

Basin Area

RR

S

Factors:Ec

FrictionSubgrade k

Design Aircraft – B ???

0 1 2 10

2 ...2* j j

SSBA D D D D D

D

*0

20

w Pk

w

100unloaded

loaded

LTE x

Average Values of NDT Parameters of R/W

15L-33R Parameter North 3000 ft Middle 5000 ft South 4000 ftArea (in.)

RRS (in.)

he (in.)

Dynamic k value (psi.in)

Interlayer friction coefficient

LTE (%)

# of Joints < 70%

Deflection Analysis

0

0.5

1

1.5

2

2.5

3

50 70 90 110

RRS - effective

Dim

en

sio

nle

ss

De

fle

cti

on

(F

ree

Ed

ge

)

AN225

A380

B 737

B777

B 757

B-747-400

DC-10-30

AN 124

B 777

Subgrade Stress Limits

UCCS, psi

½ UCCS,psi

Stress

Strain

Beginning of non-linearresponse

General Classification Approximate Resilient Modulus at a Deviatoric Stress of Approximately 6 psi

Approximate Unconfined Compressive Strength, psi

Stiff, fine-grained subgrade 12,350 33

Medium, fine-grained subgrade

7,680 23

Soft, fine-grained subgrade 3,020 13

Very soft, fine-grained subgrade

1,000 6

Present FEM Capability

Bonded Layers

132

11

3 321 2 2

1 2 21 2

1

212

2

na

e b

na

hx h

Eh h h

E E hh x h

E

13

3 321 2

1e u

Eh h h

E

Unbonded Layers

Partial Bond

c

e

e-p

hc he-p

Transformed Section

py 1e p e u e bh x h x h

e p e u

e b e u

h hx

h h

21e u

e p ee p

h

h

12e u c

e p e u ve u

s P h

h

21

12

e ue u e

e p

cv

h

h

h

P

Overlay Design – B ???

defl std devDesign relz

2 22

22

* 2

; free edge deflection1

0.0002 0.0052 0.0036

nLTE LTE

i ci i c

LTE LTE

feLTE fe

Var Var X Var LTE Var EX LTE E

Var k Vark

LTE

d

Middle 5000 feet98% Reliability

0.01.0

2.03.0

4.05.06.0

7.08.0

9.010.0

76.0% 78.0% 80.0% 82.0% 84.0% 86.0%

Restored LTE

Bo

nd

ed O

verl

ay T

hic

knes

s (i

n)

Minimum BCO Thickness

Joint LTE RestorationMiddle 5000 ft

Restored

LTE

Repair LTE # joints

80% <70%

83% <73%

85% <77%