Pullout Resistance Of Rough Rigid Piles In Granular Soil

Seeley, Gerald R.; Pfeifle, Thomas W.

doi:10.3208/sandf1972.17.3_72

Cited by 20 publications

(3 citation statements)

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“…The key influence of pile length (Slenderness ratio, Embedment ratio) on ultimate bearing capacity has been verified in model tests and field tests [1][2][3][4]. The influence of rock or soil properties on the ultimate uplift capacity of piles is that the bearing capacity of piles in dense sand is much higher than in loose sand [2,3,[5][6][7]. The uplift capacity of rocksocketed piles is controlled by the relative strength between piles and rocks when the material strength of piles is sufficient [8]; estimating the pulling capacity of piles in cohesive soils is based on an empirical relationship between soil adhesion and the undrained shear strength [1].…”

Section: Introductionmentioning

confidence: 88%

“…The axial force of pile is obtained according to formula (1) by the reinforcing steel gauge stress at each section, and the side resistance of pile is obtained according to formula (2). The axial force distribution curve of 2 belled short piles under different loads is shown in Figure 6, and the side resistance distribution curve is shown in Figure 7.…”

Section: Axial Forces Distribution and Side Resistance Distribution Omentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Uplift Behavior of Belled Short Piles in Weathered Sandstone

Yang

Chen

Yang

2018

Mathematical Problems in Engineering

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Field pull out test results of 500 kV double-circuit line of Luping-Fule are presented in this paper to investigate the uplift bearing behavior of rock-socketed belled short piles. A calculation model of rock-socketed belled short pile has been proposed. During the initial stage of loading test, uplift load is shared by even section and bell of the pile, and the bell continues to bear uplift load after the lateral resistance of even section pile reaches the limit. A different performance has been found on the case of long belled pile. At the ultimate state, the uplift resistance provided by bell accounts for about 54.9% and 34.7% of the total uplift capacity for the 6.0 m long and 7.0 m long piles, respectively. Increasing pile length has been found to noticeably increase the ultimate uplift bearing capacity, while it has less effect on the displacement of pile top. The uplift capacity of even section pile is associated with the shear strength of rock mass around the pile, and the test results demonstrate that the ultimate resistance can be equal to the shear strength. The calculation method proposed in this paper is proven to be able to accurately predict the ultimate uplift bearing capacity of the rock-socketed belled short piles.

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Section: Introductionmentioning

confidence: 88%

Section: Axial Forces Distribution and Side Resistance Distribution Omentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Uplift Behavior of Belled Short Piles in Weathered Sandstone

Yang

Chen

Yang

2018

Mathematical Problems in Engineering

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Experimental and numerical analysis to determine the uplift capacity of piles in gravels

2018

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This paper describes the process of testing and design of tension piles as fundaments of air‐supported structures for sports facilities. Two piles with different ratio between diameter and length are tested on axial static tensile load for designing purposes. The results are later compared with FEM numerical model. The obtained ultimate uplift capacity from site experiments is confirmed with the numerical model. The results from the numerical analysis regarding the shear and normal interface stresses are used to determine the soil‐pile friction angle δ. At the end, artificial neural networks were used to predict the uplift bearing capacity of piles with different geometry and soil conditions.

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