Technical information

2-23

the base course and under the HMA course (z=5 in. or z=127 mm). It was designated to

capture vertical stresses (i.e., stress in Z) at this interface. This gauge had a 36.3 psi

(0.25 MPa) range. The ASC gauge was designated to measure the vertical stresses at the

interface between the subgrade and the granular base (z=11 in. or z=280 mm). This

gauge had a 14.5 psi (0.1 MPa) range given that it is placed at a greater depth.

X-axis [ft]

-2

-4

2 4

-2

-4

-6

Y-axis [ft]

ALL

ALC

ALR

BLL

BLC

BLR

BBC

ASC

ATL

ATR

BTL

BTC

BTR

ATC

Figure 2.4.3: Sensor layout for section N1 (based on Timm et al., 2004).