A Device for the Constant Rate of Penetration Test for Piles

Garneau, R.; Samson, Laval

doi:10.1139/t74-025

Cited by 4 publications

(3 citation statements)

References 1 publication

(1 reference statement)

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“…Consequently the constant rate of penetration (CRP) method proposed by Whitaker (1957) was adopted. The equipment and the technique applied for the CRP tests have been discussed by Garneau and Samson (1974). For the tests on piles 1 and 3-5, an essentially uniform rate of penetration of 0.35 mm/ min was maintained.…”

Section: Load Testing Methodsmentioning

confidence: 99%

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Behaviour of friction piles in soft sensitive clays

Blanchet¹,

Tavenas²,

Garneau³

1980

Can. Geotech. J.

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During the construction of heavy structures, such as bridges and overpasses, on soft clays on the north shore of the St. Lawrence Valley, a detailed load test program on friction piles was performed to establish the characteristics of the most suitable type of pile and to study its long-term behaviour. Three types of piles, timber, steel pipe with closed end, and precast concrete Herkules H-420 piles, were tested. Four timber piles driven in a group and submitted to a 712 kN load served to study the long-term settlement of a small group of piles. Three deep settlement gauges were installed in the centre of this group for measuring settlements in clay at various depths.This test program was completed by the instrumentation of two bridge piers in order to verify the behaviour of larger groups of piles.The paper presents the results of the test piles, the long-term behaviour (4 years) of the bridge pier foundations resting on friction piles in soft clay, and the interpretation of the results.This study shows that the pore pressures induced by pile driving are related to the pre-consolidation of the clay and that they are much larger for tapered piles. It is demonstrated that the effective stress analysis method proposed in 1976 by Meyerhof determines adequately the ultimate pile bearing capacity, but that the effect of the timber pile taper doubles the skin friction.The settlement analysis of pile groups shows that settlements are due to the reconsolidation of the clay and shear creep deformations in the clay close to the pile wall.

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Section: Load Testing Methodsmentioning

confidence: 99%

“…An analysis of the pore pressures generated at a given depth in an overconsolidated clay deposit near 1974Oct. 16, 1974Pier concreting Jan. 16, 1975Nov.…”

Section: Driving Pore Pressuresmentioning

confidence: 99%

Behaviour of friction piles in soft sensitive clays

Blanchet¹,

Tavenas²,

Garneau³

1980

Can. Geotech. J.

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show abstract

“…Recent developments in civil engineering have created multiple problems of interaction between structures and soils, particularly when building large structures in cities and their subsoils (Borel and Reiffsteck, 2006); these are essentially problems of compatibility of deformations that can only be reliably handled by knowing the deformability of the different soils at low strain levels. In order to directly control the deformations of soils and structures as well as their interactions, a lot of research has been carried out for the purpose of developing new in-situ soil monitoring devices such as the penetrometers, dilatometers and pressuremeters, which have previously been discussed in the works of Garneau and Samson (1974), Thorel et al (2007), Cui (2011), Qiao (2011), Shaban and Cosentino (2017), etc. These devices were developed for a better knowledge of soil parameters, and also for the development of a method which makes it possible to deduce useful data that can actually be used in controls, calculations and regulatory justification of the geotechnical structures.…”

Section: Introductionmentioning

confidence: 99%