Joint Committee on Piled Foundations. Note on the Constant Rate of Penetration Test for the Determination of the Ultimate Bearing Capacity of a Pile.

Whitaker, Thomas R.; Brs,

doi:10.1680/iicep.1963.10457

Cited by 9 publications

(4 citation statements)

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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).…”

Section: Load Testing Methodsmentioning

confidence: 99%

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%

Behaviour of friction piles in soft sensitive clays

Blanchet¹,

Tavenas²,

Garneau³

1980

Can. Geotech. J.

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“…This test was developed by Whitaker (1957) for model piles, and it has proved equally useful for full scale pile tests as used by Whitaker and Cooke (1961) and by Whitaker (1963 According to Whitaker (1976), the movement of the reaction system may be of the order of 7 6 mm (30.0 in.) if kentledge is used, and about 25 mm (10.0 in.)…”

Section: Constant Rate Of Penetration Testmentioning

confidence: 99%

Pile Capacity Predictions Using Static and Dynamic Load Testing

Darrag¹

1987

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Recommendations regarding the most reliable and economical load test methods needed by highway agencies for the design and control of bridge piles are introduced. The report contains an intensive review of the state-of-the-art of the loading equipment and instrumentations for the measurement of load and deformation. A review of the state-of-the-art of dynamic measurements and their potential uses is included. Recommendations are made concerning the necessary equipment and the associated costs. The phenomenon of residual stresses due to pile driving is discussed in detail. A simple approach was developed for the prediction of such stresses to make better predictions of pile capacity and to facilitate better interpretation of load results. A computer program, named PPILENF, was developed for the purpose of predicting additional pile loads due to negative skin friction. A complete user's manual is given, including several illustrative examples.

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“…Each of these methods had specific conditions and limitations. In some approaches, a large load is required to get to the pile's plunging failure load; therefore, the constant rate of penetration method is preferred [12].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Bearing Capacity of the Board Pile in Collapsible Soil using A Laboratory Model

Mohsen,

Albusoda

2023

E3S Web Conf.

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The pile’s ultimate capacity or failure load must be computed by some criteria using load-settlement curve data gathered during the pile load test. Many scholars have proposed several approaches for evaluating the pile’s ultimate capacity in the past. This study compared different failure criteria to predict the ultimate load capacity for piles with two different lengths-to-diameter ratios embedded in gypseous soil with gypsum content of 60% under soaked and unsoaked conditions. Two types of piles were used. Floating pile and end-bearing pile. Davisson, Brinch Hansen’s 80 percent, Chin-Kondner, Mazurkiewicz’s, and Brinch Hansen’s 90 methods that were used in this study predict a higher value of the ultimate pile capacity, whereas the Decourt Extrapolation method gave fluctuated value. Fuller and Hoy’s, Butler and Hoy’s methods give far away value from realistic. On the other hand, Shen’s, ASTM, Terzaghi, and DeBeer’s methods predicted an acceptable and realistic value. The failure criterion of (15%D) where (D) is pile diameter according to(ASTM D-1143) was adopted in this type of soil.

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Joint Committee on Piled Foundations. Note on the Constant Rate of Penetration Test for the Determination of the Ultimate Bearing Capacity of a Pile.

Cited by 9 publications

References 0 publications

Behaviour of friction piles in soft sensitive clays

Behaviour of friction piles in soft sensitive clays

Pile Capacity Predictions Using Static and Dynamic Load Testing

Evaluation of the Bearing Capacity of the Board Pile in Collapsible Soil using A Laboratory Model

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