Estimation of ultimate bearing capacity of driven piles in c-φ soil using MLP-GWO and ANFIS-GWO models: a comparative study

This paper aims to study the distribution characteristics of the ratio of measured value and calculated value for ultimate bearing capacity, shaft resistance and tip resistance, and discuss the impact of shaft resistance and tip resistance on ultimate bearing capacity. A new performance function is proposed in terms of the three types of bearing capacity mentioned ahead. Take bored piles and driven piles for example, and the results from analysis indicate that the ratio of the measured value to calculated value of bored piles ranges from 0.75 to 1.45, and mostly is greater than 1.0; The ratio of the measured to predicted bearing capacity of driven piles lies between 0.8 and 1.5, and is larger than the corresponding ratio of bored piles. In addition, the reliability of tip resistance is lager than that of shaft resistance for bored pile, while the reliability of tip resistance is less than that of shaft resistance for driven piles. Meanwhile, the method presented in this paper can offer references to designers for revising and improving the technical code for pile foundations.

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New method for predicting the ultimate bearing capacity of driven piles by using Flap number

KSCE Journal of Civil Engineering ◽

10.1007/s12205-013-0315-z ◽

2014 ◽

Vol 19 (3) ◽

pp. 611-620 ◽

Cited By ~ 16

Author(s):

Fatehnia Milad ◽

Tawfiq Kamal ◽

Hataf Nader ◽

Ozguven Eren Erman

Keyword(s):

Bearing Capacity ◽

Ultimate Bearing Capacity ◽

New Method ◽

Driven Piles

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Theoretical and Actual Bearing Capacity of Driven Piles Using Model Piles in Sand

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.773-774.1453 ◽

2015 ◽

Vol 773-774 ◽

pp. 1453-1459

Author(s):

Wong Kok Leong ◽

Nor Azizi Yusoff ◽

Ameer Nazrin Abd Aziz ◽

Zaihasra Abu Talib

Keyword(s):

Bearing Capacity ◽

Theoretical Method ◽

Ultimate Bearing Capacity ◽

Load Test ◽

Cohesionless Soil ◽

Driven Piles ◽

Hollow Section ◽

Laboratory Setup ◽

Section Model ◽

Circular Hollow Section

In general, increasing of penetration rate may result in an increased of pile capacity. Occasionally, there were differences between theoretical and actual bearing capacity of the piles. Rate of penetration of pile influenced the pile bearing capacity. The bearing capacity of model pile increased as the rate of loading increased based on pile driving formula. Therefore, the study was conducted to determine the bearing capacity of model piles with different penetration forces based on theoretical method and experimented analysis. Five circular hollow section model piles using pipe pile were used to penetrate into cohesionless soil with different penetration force respectively. The loading for ultimate bearing capacity using theoretical calculation was approximately about 0.163kN.However, referring to the limitation of a laboratory setup, the maximum loading was 0.12kN. Several trials had been initiated but when it reached 0.14kN, the setup was unstable and dangerous to be continued. Therefore, the ultimate bearing capacity derived by the pile load test results were based on a pile moved up to 10% of its tip diameter criteria. In the future, both theoretical and actual calculation must be made to avoid any confusion and detect mistakes in near future.

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