Determination of Vertical Bearing Capacity of Pile Foundation Systems in Tropical Soils with Uncertain and Highly Variable Properties

Mendoza, Cristhian; Caicedo, Bernardo; Cunha, Renato Pinto da

doi:10.1061/(asce)cf.1943-5509.0000918

Cited by 9 publications

(4 citation statements)

References 19 publications

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“…The two single piles were located at a distance of 3.7m from the center of the pile groups. As the interaction between the pile group and pile cap in clay is low [27], in this analysis, the group pile stage was a rigid high pile cap and the cap was without contact with the soil. We compared these test results with the results of the back-analysis method in this paper for the load-settlement characteristics of the single pile.…”

Section: Comparison Of Computed Results With Field-measured Resultsmentioning

confidence: 99%

Load-Settlement Behaviour Analysis Based on the Characteristics of the Vertical Loads under a Pile Group

2022

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The nonlinear load-settlement behaviours of vertically loaded pile groups containing various numbers of piles (up to a few hundred piles in a group) are analysed using the method proposed by Lee and Xiao. This back-analysis method assumes the “local shear displacement” of a thin layer of disturbed soil along the pile–soil interface and the soil outside the interface is assumed to be linear elastic. Parametric studies are conducted to examine the load-displacement behaviours of the rigidly capped pile groups. Factors such as the number of piles in a group, pile slenderness (L/D), and pile spacing (S/D) are examined to study the effects on the performance of pile groups up to the failure state. Some phenomenological features of large pile groups under nonlinear conditions, which are difficult to obtain through an elastic analysis, are revealed in the present analysis.

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Section: Comparison Of Computed Results With Field-measured Resultsmentioning

confidence: 99%

Load-Settlement Behaviour Analysis Based on the Characteristics of the Vertical Loads under a Pile Group

2022

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“…Generally, the erosion is caused by the reduction of the underpass section caused by the newly built bridge, and the sand carrying capacity of the water flow increases to a certain extent with the increase in the flow velocity, thus resulting in the overall decrease of the riverbed elevation in the underpass section [21]. With the dynamic development of general erosion, the cross-section under the bridge gradually increases after the river bed elevation drops, and the sediment-carrying capacity of the flow returns to a lower level with the decrease in flow velocity.…”

Section: Scour Mechanismmentioning

confidence: 99%

Study on the Influence of Water Erosion on the Bearing Capacity and Function of the High Pile Foundation of the Wharf

Yang,

Zhang,

et al. 2024

Water

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High-pile foundation is a common form of deep foundation commonly used in ocean environments, such as docks and bridge sites. Aiming at the problem of bearing capacity of high pile foundations, this paper proposes the calculation of bearing capacity and the analysis of scour depth of high pile foundations under the action of scour based on the modified p-y curve. In this paper, three kinds of scour mechanisms—natural evolution scour, general scour, and local scour—are described; and the calculation methods of scour widely used at present are compared and analyzed. The solution of the vertical stress of soil around the pile under local scour is solved and applied to the β method to solve the lateral resistance of the pile under local scour. The local erosion is equivalent to the whole erosion, and the expression of the ultimate soil resistance before and after the equivalent is calculated, respectively, according to the principle that the ultimate soil resistance at a certain point above the equivalent pile end remains unchanged. The distance from the equivalent soil surface to the pile end can be obtained simultaneously, and then the equivalent erosion depth, p-y curve of sand at different depths, and high pile bearing capacity can be obtained. Finally, it is found that the bending moment of a single pile body varies along the pile body in the form of a parabola, and the maximum bending moment of the pile body is below the mud surface and increases with the increase in horizontal load. When the scouring depth is 30 m, the horizontal load is 25 KN, and the maximum bending moment of the pile body is about 150 N·m. The data with a relative error greater than 10% accounted for only 16.6% of the total data, and the error between the calculated value and the measured value was small. The formula can predict the erosion depth more accurately.

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“…These variables influence the initial shear modulus, modulus degradation and evolution of damping. Random numbers generated using these statistical variables followed a lognormal distribution (Baecher & Christian, 2003, Griffiths y Tveten 2005Mendoza et al, 2012;Papaioannou y Straub 2012, Mendoza et al, 2016Mendoza et al, 2018). Geotechnical variables were obtained from the data in section 2.…”

Section: Simulation Stepsmentioning

confidence: 99%

“…One thousand simulations were used because it stabilized the mean and the standard deviation of the maximum spectral acceleration. This criterion was used in the researches by Haldar and Babu 2008;Suchomel and Masín 2011;Mendoza et al 2016. A Python subroutine obtained the S a output of the 3,000 simulations.…”

Section: Simulation Stepsmentioning

confidence: 99%

Seismic Evaluation of a Profile of Volcanic Ash From the South American Andes

Mendoza

Ramos

Calle

2021

International Journal of Geotechnical Earthquake Engineering

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Although soils derived from volcanic ash are only a small portion of the soils that cover the world's surface, cities have developed on some of these soils. This makes their study interesting, especially since soils derived from volcanic ash have special characteristics including a high void ratio, liquid limits that can be greater than 100%, and shear wave velocities close to 150 m/s. Cities on these soils in the South American Andes are in areas with frequent and intense seismic activity making an understanding of how earthquakes affect these soils a matter of importance. This paper analyzes site response by the equivalent linear method, taking into account the variability of these soils. The Monte Carlo method was used for degradation of the shear modulus and damping curves. The results of this study show factors that amplify spectral acceleration can cause this measurement to become greater than four. In addition, the authors found that maximum spectral accelerations are functions of high plasticity indexes whose influence increases when shear wave velocities are between 175 and 225m/s.

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Determination of Vertical Bearing Capacity of Pile Foundation Systems in Tropical Soils with Uncertain and Highly Variable Properties

Cited by 9 publications

References 19 publications

Load-Settlement Behaviour Analysis Based on the Characteristics of the Vertical Loads under a Pile Group

Load-Settlement Behaviour Analysis Based on the Characteristics of the Vertical Loads under a Pile Group

Study on the Influence of Water Erosion on the Bearing Capacity and Function of the High Pile Foundation of the Wharf

Seismic Evaluation of a Profile of Volcanic Ash From the South American Andes

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