A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Densification of Granular Soils by Pile Driving and Implications for Evaluation of Liquefaction
A common practice for evaluation of liquefaction risk in pile groups relies upon the simplified procedure using SPT N60 values. However, there have been few documented instances where the densification caused by driving displacement piles in groups has been taken into account for reduction in liquefaction risk. This paper presents a collection of field data obtained prior to and after driving piles in granular soil that demonstrates a significant increase in N values. The increase is most pronounced within groups of piles spaced at 4 pile diameters or less and the increase extends beyond the limits of a group, but to a lesser degree. Using the collected data, this paper presents a method that estimates the increase in N values for loose to medium dense sands as a consequence of pile driving. The method is based on theoretical considerations with empirical validation. The method can be used to provide an improved evaluation of liquefaction risk in pile groups, as shown by an example.
Densification of Granular Soils by Pile Driving and Implications for Evaluation of Liquefaction
A common practice for evaluation of liquefaction risk in pile groups relies upon the simplified procedure using SPT N60 values. However, there have been few documented instances where the densification caused by driving displacement piles in groups has been taken into account for reduction in liquefaction risk. This paper presents a collection of field data obtained prior to and after driving piles in granular soil that demonstrates a significant increase in N values. The increase is most pronounced within groups of piles spaced at 4 pile diameters or less and the increase extends beyond the limits of a group, but to a lesser degree. Using the collected data, this paper presents a method that estimates the increase in N values for loose to medium dense sands as a consequence of pile driving. The method is based on theoretical considerations with empirical validation. The method can be used to provide an improved evaluation of liquefaction risk in pile groups, as shown by an example.
Densification of Granular Soils by Pile Driving and Implications for Evaluation of Liquefaction
Rhyner, Frederick C. (author)
IFCEE 2018 ; 2018 ; Orlando, Florida
IFCEE 2018 ; 284-300
2018-06-06
Conference paper
Electronic Resource
English
Densification of Granular Soils by Pile Driving and Implications for Evaluation of Liquefaction
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