Skin and Toe Resistance Mobilisation of Pile During Laboratory Static Load Test

Meyer, Z.; Żarkiewicz, Krzysztof

doi:10.2478/sgem-2018-0001

Cited by 17 publications

(14 citation statements)

References 2 publications

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“…The course of this function depends, among other things, on: the geometry of the pile, the ground conditions, and the way resistance is formed with pile settlement. The points obtained from the test can be approximated by the curve that was proposed by Meyer and Kowalow in the form of Equation ( 1 ) presented in [ 66 , 83 , 84 ].

where:

—settlement of the head of the pile, mm;

—settlement constant, mm/kN;…”

Section: Experimental Results and Discussionmentioning

confidence: 99%

“…When piles are loaded to their ultimate capacity, the phenomenon of soil displacement to the surface that accompanies the loading of direct foundations is not observed. The ratio of the pile penetration ( H ) in the ground to its diameter ( D ) should be greater than 2.5 [ 66 ], but it is recommended that

≥ 10. Taking the above technological and geometrical requirements into account, it was planned to execute piles with a drill with a diameter of 40 mm and a minimum soil penetration of 400 mm.…”

Section: Materials Methods and Experiments Programmentioning

confidence: 99%

“…The test bed that was prepared in this way may only be used for one test pile load. As indicated by the previous studies [ 66 , 67 , 74 , 75 ], performing a pile test load to a load value close to the ultimate bearing capacity results in a critical condition at which the soil porosity index changes to reach the so-called steady state line and critical porosity [ 76 , 77 , 78 , 79 ]. As a result, the soil environment becomes heterogeneous.…”

Section: Materials Methods and Experiments Programmentioning

confidence: 99%

“…The measured values were recorded at a frequency of 1 Hz. In the conducted study, the pile bearing capacity was defined by two criteria: load at which uncontrolled pile settlement was observed (this is characteristic of a load close to the limit bearing capacity) [66] or the force at which the pile settlement exceeded the value of 20 mm. The test bed that was prepared in this way may only be used for one test pile load.…”

Section: Strength/load Capacity Testing Of Pilesmentioning

confidence: 99%

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Foundation Piles—A New Feature for Concrete 3D Printers

et al. 2021

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Foundation piles that are made by concrete 3D printers constitute a new alternative way of founding buildings constructed using incremental technology. We are currently observing very rapid development of incremental technology for the construction industry. The systems that are used for 3D printing with the application of construction materials make it possible to form permanent formwork for strip foundations, construct load-bearing walls and partition walls, and prefabricate elements, such as stairs, lintels, and ceilings. 3D printing systems do not offer soil reinforcement by making piles. The paper presents the possibility of making concrete foundation piles in laboratory conditions using a concrete 3D printer. The paper shows the tools and procedure for pile pumping. An experiment for measuring pile bearing capacity is described and an example of a pile deployment model under a foundation is described. The results of the tests and analytical calculations have shown that the displacement piles demonstrate less settlement when compared to the analysed shallow foundation. The authors indicate that it is possible to replace the shallow foundation with a series of piles combined with a printed wall without locally widening it. This type of foundation can be used for the foundation of low-rise buildings, such as detached houses. Estimated calculations have shown that the possibility of making foundation piles by a 3D printer will reduce the cost of making foundations by shortening the time of execution of works and reducing the consumption of construction materials.

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where:

—settlement of the head of the pile, mm;

—settlement constant, mm/kN;…”

Section: Experimental Results and Discussionmentioning

confidence: 99%

≥ 10. Taking the above technological and geometrical requirements into account, it was planned to execute piles with a drill with a diameter of 40 mm and a minimum soil penetration of 400 mm.…”

Section: Materials Methods and Experiments Programmentioning

confidence: 99%

Section: Materials Methods and Experiments Programmentioning

confidence: 99%

Section: Strength/load Capacity Testing Of Pilesmentioning

confidence: 99%

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Foundation Piles—A New Feature for Concrete 3D Printers

et al. 2021

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“…The axial load has been applied and settlement has been measured. Firstly the load-settlement relationship was approximated using Meyer-Kowalow method widely described in [15][16][17]. During approximating the following relationship was obtained ( 18), (19).…”

Section: Practical Approach Of the Analysismentioning

confidence: 99%

Pile bearing analysis based upon ultimate values of toe and skin resistance as well as their mobilization with settlement

Żarkiewicz

2019

MATEC Web Conf.

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The main task of pile foundation is the reduction of settlement and ensure the safety of the building. These two factors are in strongly relationship. In practice pile load capacity is calculated based on ultimate resistances including factor of safety. The load-settlement relationship is non-linear, so it would can happen that despite the applied load (several times smaller than ultimate pile load capacity), the settlement exceeds the allowable value, and in consequently it might cause damage of the structure. In the paper the method of determining ultimate resistances and mobilization of these resistances with settlement was presented based on the static pile load test results. The proposed method can be applied in pile load capacity verification.

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