Table 6. Backcalculated modulus at CWA using WESDEF

Figure 16. Effect of PCC modulus on change in subgrade modulus from WESDEF during spring thaw at Outagamie County Airport

Table 7. Effect of change in PCC modulus on base and subgrade modulus

SR96_12
Page Navigation
17

Outagamie County Airport

Figure 17. Backcalculated base course modulus using WESDEF (OCA).

lack of values in the base modulus, subgrade modulus

sured deflections. The AA error was in the vicinity of

and error columns in Table 6 indicate that either it was

not possible to converge to a solution or that the base

Solutions could not be obtained for locations 6, 15

course modulus was extremely low (less than 1 MPa).

and 16. In many cases, WESDEF printed a "THIS

When only the AA error column lacks values, it

MATRIX HAS NO SOLUTION" message. At other

means that we used the backcalculated results from

times, the backcalculated base course modulus was

WESDEF but ignored the controlling layer modulus

zero, or very close to zero. It is interesting to note that

range, i.e., the backcalculated modulus was either

at these locations the bedrock was quite close to the

above or below the prescribed range.

surface (less than 2 m). At the other locations, with a

The effect of changing the PCC modulus is shown

few exceptional days, the error between the calculated

in Table 7 for FWD locations 9, 17, 18 and 19. As

and measured values was acceptable (Table 6). The

Table 6. Backcalculated modulus at CWA using WESDEF.

Western Governors University

Privacy Statement
Press Release
Contact

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business