For a site with compressible soils, a bridge abutment has lateral loads to be resisted by piles. FHWA states to avoid battered piles in this instance. If they can't be avoided (i.e., soils are too weak to get significant lateral capacity from vertical piles), does anyone have a reference as to...
A question on the evaluation of pile capacity. In general, the pile size is calculated based on the vertical load capacity required. Then often an available lateral load on that pile is calculated and provided for design.
For a vertical pile, when checking the available capacity of the pile...
In the past when I've had potentially liquefiable soils I've evaluated liquefaction potential using the CRR:CSR method, which includes a magnitude scaling factor for the magnitude of earthquake in question. I'd refer to the USGS earthquake probability mapping program that mapped probability of...
I have a small dam to be analyzed for rapid drawdown. No specific laboratory soil strength data available, but I have boring logs and gradations. The average N60 value through the embankment soils is 23 bpf. Gradation tests on the embankment soils show the material to be sand with ~10% gravel...
In modeling seismic slope stability, it is "typical" to model the horizontal acceleration coefficient of 0.5xPGA(site modified). It is my understanding that the 0.5 factor applied to PGA is to account for short duration of loading. My question is, if a site has site-specific ground vibration...
I'm looking for some input on dynamic load testing of an end-bearing steel pile in hard granite bedrock.
Consider a PDA test was carried out on a steel pile acting in end-bearing (~90% EB, loose granular soil above rock) that results in 1,000 tons ultimate capacity at a given set blow-count...
I have a project that consists of a building supported on deep foundations. Lateral loads are planned by the structural engineer to be resisted by the grade beams. As part of the lateral load resistance design, the grade beams will be extended to as deep as about 8 feet. The grade beam depth...
Hello All,
I've got a project that has about 45 feet of granular soil underlain by overconsolidated clay from 45 to 80, and then normally consolidated clay from 80 to 165 feet (rock at 165 feet). The project will include placement of about 3 feet of fill over the site, and then a new building...
Hello Group,
I'm new to the forum, but have used advice from you guys for various projects in the past. Thanks for all your insight.
I have been tasked with designing a sheet pile wall for a 20-foot excavation (temporary, as it will be backfilled). The soil behind the sheet pile wall is...
