Journal ArticleDOI
Bearing capacity of auger-cast piles in sand
TLDR
In this paper, the results of 66 loading tests on auger-cast piles in sand are presented, showing that shaft resistance is independent of the relative density of the sand, while point resistance can be directly correlated with results of standard penetration and cone penetrometer tests.Abstract:
Auger‐cast piles are formed by drilling a continuous flight auger into the ground and, on reaching the required depth, pumping grout or concrete down the hollow stem as the auger is steadily withdrawn. The sides of the hole are supported by the soil‐filled auger, eliminating the need for temporary casing or bentonite slurry. This paper outlines important features of auger‐cast pile installation that influence the structural integrity and geotechnical capacity of completed piles. These include soil decompression, correlation between the rotational and vertical speeds of the auger, and precise coordination of auger extraction and grout supply. The results of 66 loading tests on auger‐cast piles in sand are presented. Shaft resistance is found to be independent of the relative density of the sand, while point resistance can be directly correlated with results of standard penetration and cone penetrometer tests. Empirical design methods for bored piles were found to underestimate the failure loads of auger‐ca...read more
Citations
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Journal ArticleDOI
Practical method for load and resistance factor design (LRFD) of deep foundations at the strength and service limit states
TL;DR: In this paper, a Load and Resistance Factor Design (LRFD) method is developed for the simulation of deep foundations, which integrates load test data into static capacity design methods to optimize deep foundation design.
Journal ArticleDOI
Design Methodology for Axially Loaded Auger Cast-in-Place and Drilled Displacement Piles
TL;DR: In this paper, a design methodology for axially loaded augered piles installed in predominately sandy soils using the t-z method was developed. But the design parameters for augeed piles were not considered.
Proceedings ArticleDOI
Axial Performance of ACIP Piles in Texas Coastal Soils
TL;DR: In this article, the authors evaluated axial compressive capacities of augered, cast-inplace (ACIP) piles in the Pleistocene terrace deposits of the Texas Gulf Coast and Recent to Modern alluvial soils.
Journal Article
Review of augered pile practice outside the United States : Design and construction of auger cast piles
TL;DR: In this article, two construction systems for augered piles used extensively in Europe are described: the continuous-flight auger system and the screw-pile system, and some innovative design and construction methods are evaluated.
References
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Journal ArticleDOI
Bearing capacity and settlement of pile foundations
TL;DR: In this paper, the bearing capacity of longer piles can be estimated from the limiting values of the point resistance and skin friction using either the friction angle of the soil or preferably the results of static and standard penetration tests directly.
Journal ArticleDOI
Measured and predicted axial response of 98 piles
TL;DR: In this article, the authors deal with the prediction of the response to monotonic axial loading of single piles in various soil conditions, and evaluate 13 methods to predict the ultimate load of a pile and five methods designed to predict its settlement.
Journal ArticleDOI
Spt-cpt correlations
TL;DR: In this article, a method for estimating equivalent standard penetration test (SPT) N −values from Cone Penetration Test (CPT) data has been presented accounting for variations in soil grain size and SPT energy input.
Journal ArticleDOI
New Design Correlations for Piles in Sand
Harry M. Coyle,Reno R. Castello +1 more
TL;DR: In this paper, a critical review of the literature clearly shows that existing theories which are used to determine the bearing capacity of piles driven in sand are not satisfactory Careful examination of the results of experimental studies indicates that existing theory fail to consider all significant parameters.
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