S - Kam Ng PhD Dissertation Final.pdf - Digital Repository of CCEE ...

1632. Accounting for the actual time elapsed immediately after a pile installation andassumes the time at the EOD (t EOD ) as small as 1 minute;3. Incorporating measureable soil parameters from SPTs and CPTs for a general pilesetup rate estimation;4. Not requiring any inconvenient restrikes during constructions; and5. Accounting for the soil parameters at different layers along a pile shaft.4.5. ValidationThe proposed pile setup equation was developed using one-size steel H-piles (HP 250× 63) installed in cohesive soils. Therefore, to generalize the use of the proposed method, itis necessary to validate the equation for different sizes of steel H-piles and for different piletypes and sizes. This section summarizes this validation process using data records availablein PILOT and in the literature. Since the proposed equation was established to quantify pilesetup experiences in cohesive soil, its application for a mixed soil profile is evaluated using arecently completed steel H-pile ISU8.4.5.1. Steel H-pileIt is important to validate the proposed pile setup method using both Iowa datarecords from the PILOT (Roling et al., 2010) as well as using data available in the literaturethat represent different steel H-piles embedded in cohesive soils. The PILOT contains twelvedata records in cohesive soils that have sufficient pile, soil and hammer information for pilesetup evaluations using the WEAP-SA. However; it contains no Pile Driving Analyzer(PDA) records required for CAPWAP analysis. Table 4.2 summarizes the essentialinformation of the twelve records for the proposed pile setup estimations. Although otherpile sizes were used, HP 250 × 63 was the most commonly used steel piles, and they wereembedded in primarily cohesive soils. Since CPTs with dissipation tests were not performedat these sites, the average C h values were estimated from Eq. (4.7) using SPT N-values.SLTs were performed between 1 and 8 days after the EOD, and the measured pile resistanceswere determined based on the Davisson’s criterion. The pile resistances at the EOD