Lateral pile cap load tests with gravel backfill of limited width.

Rollins, Kyle M.; Gerber, Travis M.; Kwon, Ku Hyun

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Lateral pile cap load tests with gravel backfill of limited width.

2010-08-01
By Rollins, Kyle M. ; Gerber, Travis M. ; Kwon, Ku Hyun

File Language:

English

Details

Creators:

Rollins, Kyle M. ; Gerber, Travis M. ; Kwon, Ku Hyun
Corporate Creators:

Brigham Young University. Department of Civil and Environmental Engineering
Subject/TRT Terms:
Publication/ Report Number:

UT-10.17
Resource Type:

Tech Report
Geographical Coverage:

Utah
Edition:

Final.
Corporate Publisher:

Utah. Dept. of Transportation. Research Division
Abstract:

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.
Format:

PDF
Funding:

06 9148
Download URL:

https://rosap.ntl.bts.gov/view/dot/18448/dot_18448_DS1.pdf
File Type:

[PDF - 867.35 KB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:a083d83240e159441a994cdc22b03884ca29362c7f8d69ced8b23417b304e1fc

File Language:

English

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