Case studies to demonstrate challenges of driven piles on rock
Journal Title: Geotechnical Research - Year 2017, Vol 4, Issue 2
Abstract
In Wyoming, pile foundations for bridges are often driven on rock materials because of the state’s shallow bedrock stratigraphy. Unfortunately, no static analysis methods are currently available for estimating the resistance of these driven piles. In this paper, two recently completed bridge projects (the Owl Creek and Woods Wardell sites) on steel H-piles in Wyoming are explicitly presented, and data from three past projects are included to highlight the limited knowledge and challenges pertaining to the present design and construction practices. Static analysis methods were used to estimate the geotechnical resistances of these piles. The wave equation analysis program and the case pile wave analysis program were used to verify their performances during construction. Structural capacities of these piles were also calculated. The results of the studies show that the static analysis methods and structural analyses yield inconsistent pile resistance estimations. Recommendations in terms of pile bracing and embedded pile length are proposed to predict better the resistances of piles on soft rock.
Authors and Affiliations
Kam Ng
Keywords
Related Articles
- EP ID EP292347
- DOI 10.1680/jgere.16.00015
- Views 60
- Downloads 0
The compressibility of natural and reconstituted marine clays
There is mounting evidence in favour of replacing the e against log10(s0v) diagram, conventionally used to represent soil compressibility in an oedometer, with a log(v) against log(s0v) diagram, which significantly impro...
Mechanical behaviour of sand stabilised with colloidal silica
The response of sand stabilised with colloidal silica aqueous gel is examined in the laboratory, under direct shear, triaxial and normal compression loading, in comparison to that of untreated sand of similar density to...
Impact of highly weathered geology on pipejacking forces
For the Kuching Wastewater Management System Phase 1 project in Kuching, Malaysia, 7·7 km of trunk sewer lines were constructed in the highly fractured, highly weathered Tuang Formation using a pipe-jacking method. The p...
Seismic analysis of pile in liquefiable soil and plastic hinge
Liquefaction is one of the leading seismic actions that cause extensive damage to buildings and infrastructure during earthquakes. In many historic cases, plastic hinge formations in piles were observed at inexplicable l...
The bearing capacity of footings on sand with a weak layer
Minor details of the ground, such as thin weak layers, shear bands and slickensided surfaces, can substantially affect the behaviour of soil–footing and other geotechnical systems, despite their seeming insignificance. I...