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 45
- 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...
Research-oriented ground investigation projects at Changi, Singapore
The Changi East Reclamation projects in Singapore were implemented in five phases starting from 1991 and completed in 2005. Due to the excessive magnitude of settlement likely to occur over a long period of duration caus...
LRFD guides for driven piles considering pile set-up phenomenon
By using an electronic database consisting of previously tested pile data and ten completed full-scale pile tests in Iowa, USA, load and resistance factor design (LRFD) resistance factors considering various construction...
Behaviour of MH silts with varying plasticity indices
It is important for geotechnical engineers to understand the intrinsic and mechanical behaviour of silt as it is presently recognised that there exist gaps in understanding its fundamental behaviour. The behaviour of kao...
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...