The influences of subgrade modulus and vehicle load on the structural surface deflection were analyzed.
This study uses the cement-solidified contaminated soil as road subgrade and explores the influences of subgrade modulus and vehicle load on pavement settlements.
For a single pile, they observed the variation of subgrade modulus
with respect to depth and the effect of cyclic loading on deflection.
(5) The variation of the subgrade modulus
and moisture followed the rule that the modulus decreased with moisture increase.
* backcalculation equations: regression equations have been developed to predict subgrade modulus
using the deflection testing data (Newcomb 1987).
Also, in the wet season, subgrade modulus
will be lower.
[k.bar] = horizontal subgrade modulus
of soil given in force/(length)3
Soil spring coefficients are calculated using a soil subgrade modulus
of 250 kip/sf/foot of deflection and projecting element areas in both the x and y directions.
The behavior of soil-pile interaction has been analyzed using the concept of subgrade modulus
. In fact, the static equilibrium between pile and surrounding soil must be initially obtained.
The test results had shown that use of granular fill and geogrid for reinforced soil footings (RSF) has considerable effects on the subgrade modulus
and bearing capacity.
In the first case study, first four FWD deflections (D0, D12, D24, and D36) along with AC layer thickness ([T.sub.ac]) and base course thickness ([T.sub.bc]) were used as inputs (a scenario involving incomplete datasets) and two separate ANFIS models were employed to predict AC modulus ([E.sub.AC]) and non-linear subgrade modulus
([E.sub.Ri]) (see Fig.