Numerical Modeling of Pile Installation Influence on Surrounding Soil

Baca, Michał

doi:10.5593/sgem2017/12/s02.079

Cited by 8 publications

(8 citation statements)

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“…It can be also used as a model test to determine soil capacity. The results of numerical simulations provided by Baca and Brząkała [ 16 ] have shown comparability between the traditional SLT and the Osterberg test.…”

Section: Discussionmentioning

confidence: 96%

“…Field tests were conducted in order to develop the methods of evaluating the bearing capacity of the pile mobilized at its base and on its side. Preliminary comments and remarks were already presented in works of Baca [ 14 , 15 , 16 ] related to his Ph.D. research program, regarding the range of the observed displacement and the testing appliance behavior in the course of bi-directional static load testing regardless of the testing accuracy. Methods proposed by England [ 17 ] and first attempts at numerical simulation recently given by Baca in work [ 16 ] demand reliable data for the analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Preliminary comments and remarks were already presented in works of Baca [ 14 , 15 , 16 ] related to his Ph.D. research program, regarding the range of the observed displacement and the testing appliance behavior in the course of bi-directional static load testing regardless of the testing accuracy. Methods proposed by England [ 17 ] and first attempts at numerical simulation recently given by Baca in work [ 16 ] demand reliable data for the analysis. These studies consider different ways of application of the load on the pile base with regard to a different value and sign of stress transferred to the surroundings of the pile by its side surface.…”

Section: Introductionmentioning

confidence: 99%

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Accuracy Assessment of Semi-Automatic Measuring Techniques Applied to Displacement Control in Self-Balanced Pile Capacity Testing Appliance

Muszyński

Rybak

Kaczor

2018

Sensors

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Static load tests of foundation piles are the basic method for the designing or verification of adopted design solutions which concern the foundation of a building structure. Preparation of a typical test station using the so-called inverted beam method is very expensive and labor-intensive. The settlement values of the loaded pile are usually recorded using accurate dial gauges. These gauges are attached to a reference beam located in close proximity to the pile under test, which may cause systematic errors (difficult to detect) caused by the displacement of the adopted reference beam. The application of geodetic methods makes it possible to maintain an independent, external reference system, and to verify the readouts from dial gauges. The article presents an innovative instrumentation for a self-balanced stand for the static load test made from a closed-end, double steel pipe. Instead of typical, precise geometric leveling, the semi-automatic measuring techniques were used: motorized total station measurement and terrestrial laser scanning controlled by a computer. The processing of the acquired data made it possible to determine the vertical displacements of both parts of the examined pile and compare displacements with the results from the dial gauges. On the basis of the excess of the collected observations, it was possible to assess the accuracy, which confirmed the usefulness of measuring techniques under study.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Accuracy Assessment of Semi-Automatic Measuring Techniques Applied to Displacement Control in Self-Balanced Pile Capacity Testing Appliance

Muszyński

Rybak

Kaczor

2018

Sensors

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“…It should be underlined that the installation effect of the pile will affect the stiffness of the soil by changing the stress state around the pile, which further leads to a significant change in the bearing capacity of the pile over time [23][24][25]. However, because this paper focuses on the influence of different length-diameter ratios on the bearing capacity of the pile and has strictly maintained the consistency of each test installation method, this paper does not consider the specific impact of the installation effect on the bearing capacity of the pile.…”

Section: Establishment Of the Numerical Modelmentioning

confidence: 99%

Model Test and Numerical Simulation Study on the Effect of Mudcake and Length‐Diameter Ratio on the Bearing Capacity of Bored Cast‐in‐Place Piles

Kan

Liu

2022

Advances in Civil Engineering

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To study the effect of length-diameter ratio and mudcake on the bearing capacity of bored cast-in-place piles, the indoor model test and finite element numerical simulation method were used to carry out the loading test of piles under different mudcake thicknesses (0 and 0.5 mm) and different length-diameter ratios (10, 14, and 24). The variation law of pile top displacement, pile bearing capacity, pile axial force, and lateral friction resistance under the vertical load was analyzed. The results show that the larger the length-diameter ratio of bored pile is, the more effectively the negative influence of mudcake around the pile on the settlement and end resistance of the pile is restrained, and the ultimate bearing capacity of the pile is improved. The research results have important scientific value and practical significance for understanding the influence of length-diameter ratio on bearing capacity of bored cast-in-place piles.

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“…During the pile jacking process, the force locked inside the pile body after the completion of the one-way pile pressing is called the residual stress due to the unloading of the pile top and the failure to fully recover the elastic compression of pile body, which has been comprehensively considered [23][24][25][26][27][28]. The test shows that for partially constrained pile bodies, the lateral pressure affects the vertical stress, and there was a considerable increment of the vertical stress as caused by the pile body.…”

Section: Axial Force Distribution Law For Pile Bodymentioning

confidence: 99%

A Model Test for the Influence of Lateral Pressure on Vertical Bearing Characteristics in Pile Jacking Process Based on Optical Sensors

Wang

Liu

Sang

et al. 2020

Sensors

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Photoelectric integrated testing technology was used to study precast piles during pile jacking at the pile–soil interface considering the influence of the earth and pore water pressures on its vertical bearing performance. The low temperature sensitive fiber Bragg grating (FBG) strain sensors and miniature silicon piezoresistive sensors were implanted in the model pile to test the changes of earth pressure, pore water pressure and pile axial force of the jacked pile at the pile–soil interface, and the influence of lateral pressure on pile axial force was studied. The test results showed that the nylon rod is feasible as a model pile. The FBG strain sensor had a stable performance and monitored changes in the axial force of the model pile in real time. The miniature earth and pore water pressure sensors were small enough to avoid size effects and accurately measured changes in the earth and pore water pressures during the pile jacking process. During pile jacking, the lateral earth pressure increased gradually in depth, and the lateral earth pressure at the same depth tended to decrease at greater depths. Lateral pressures caused the axial force of the pile to increases by a factor of 1–2, where the maximum was 2.7. Therefore, the influence of the lateral pressure must be considered when studying the residual pile stress.

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Numerical Modeling of Pile Installation Influence on Surrounding Soil

Cited by 8 publications

References 0 publications

Accuracy Assessment of Semi-Automatic Measuring Techniques Applied to Displacement Control in Self-Balanced Pile Capacity Testing Appliance

Accuracy Assessment of Semi-Automatic Measuring Techniques Applied to Displacement Control in Self-Balanced Pile Capacity Testing Appliance

Model Test and Numerical Simulation Study on the Effect of Mudcake and Length‐Diameter Ratio on the Bearing Capacity of Bored Cast‐in‐Place Piles

A Model Test for the Influence of Lateral Pressure on Vertical Bearing Characteristics in Pile Jacking Process Based on Optical Sensors

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