A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Lateral Pile Cap Load Tests with Gravel Backfill of Limited Width
This study investigated the increase in passive force produced by compacting a dense granular fill adjacent to a pile cap or abutment wall when the surrounding soil is in a relative loose state. Lateral load tests were performed on a pile cap with three backfills to evaluate the static and dynamic behavior. One backfill consisted of loose silty sand while the other two consisted of dense gravel zones 3 ft (0.91 m) and 6 ft (1.82 m) wide between the pile cap and the loose silty sand. The 3 ft and 6 ft wide dense gravel zones increased the lateral resistance by 75 to 150% and 150 to 225%, respectively relative to the loose silty sand backfill. Despite being thin relative to the overall shear length, the 3 ft and 6 ft wide gravel zones increase lateral resistance to 59% and 83%, respectively of the resistance that would be provided by a backfill entirely composed of dense gravel. The dynamic stiffness for the pile cap with the gravel zone decreased about 10% after 15 cycles of loading, while the damping ratio remained relatively constant with cycling. Dynamic stiffness increased by about 10 to 40% at higher deflections, while the damping ratio decreased from an initial value of about 0.30 to around 0.26 at higher deflections.
Lateral Pile Cap Load Tests with Gravel Backfill of Limited Width
This study investigated the increase in passive force produced by compacting a dense granular fill adjacent to a pile cap or abutment wall when the surrounding soil is in a relative loose state. Lateral load tests were performed on a pile cap with three backfills to evaluate the static and dynamic behavior. One backfill consisted of loose silty sand while the other two consisted of dense gravel zones 3 ft (0.91 m) and 6 ft (1.82 m) wide between the pile cap and the loose silty sand. The 3 ft and 6 ft wide dense gravel zones increased the lateral resistance by 75 to 150% and 150 to 225%, respectively relative to the loose silty sand backfill. Despite being thin relative to the overall shear length, the 3 ft and 6 ft wide gravel zones increase lateral resistance to 59% and 83%, respectively of the resistance that would be provided by a backfill entirely composed of dense gravel. The dynamic stiffness for the pile cap with the gravel zone decreased about 10% after 15 cycles of loading, while the damping ratio remained relatively constant with cycling. Dynamic stiffness increased by about 10 to 40% at higher deflections, while the damping ratio decreased from an initial value of about 0.30 to around 0.26 at higher deflections.
Lateral Pile Cap Load Tests with Gravel Backfill of Limited Width
K. M. Rollins (author) / T. M. Gerber (author) / K. H. Kwon (author)
2010
44 pages
Report
No indication
English
Static and Dynamic Lateral Load Tests on a Pile Cap with Partial Gravel Backfill
| British Library Conference Proceedings | 2008
Lateral Resistance of Full-Scale Pile Cap with Gravel Backfill
| British Library Online Contents | 2002
Lateral Resistance of Full-Scale Pile Cap with Gravel Backfill
| Online Contents | 2002
Cyclic Lateral Load Behavior of a Pile Cap and Backfill
| British Library Online Contents | 2006