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

Wang, Yonghong; Liu, Xueying; Sang, Songkui; Zhang, Mingyi; Wang, Peng

doi:10.3390/s20061733

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…Nevertheless, it is also difficult to obtain results from field tests. Accurate investigation of a real pile behaviour would require the application of instrumented piles [37,38], deeper analysis of contact effects on the pile surface [39] or model piles in calibration chambers on a geotechnical centrifuge [40][41][42]. It is clear that some recent developments of Material Point Method (MPM) [43] and Particle Finite Element Method (PFEM) [44] offer more sophisticated solutions, but the presented idea seems to be relatively easy to calibrate using SLT or pile driving reports (for precast driven piles).…”

Section: Discussionmentioning

confidence: 99%

Numerical Modelling of Various Aspects of Pipe Pile Static Load Test

2021

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Due to the development of dedicated software and the computing capabilities of modern computers, the application of numerical methods to analyse more complex geotechnical problems is becoming increasingly common. However, there are still some areas which, due to the lack of unambiguous solutions, require a more thorough examination, e.g., the numerical simulations of displacement pile behaviour in soil. Difficulties in obtaining the convergence of simulations with the results of static load tests are mainly caused by problems with proper modelling of the pile installation process. Based on the numerical models developed so far, a new process of static load test modelling has been proposed, which includes the influence of pile installation on the soil in its vicinity and modelling of contact between steel pile and the soil. Although the presented method is not new, this is relevant and important for practitioners that may want to improve the design of displacement piles. The results of the numerical calculations were verified by comparing them with the results of pipe pile field tests carried out in a natural scale on the test field in Southern Poland.

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Section: Discussionmentioning

confidence: 99%

Numerical Modelling of Various Aspects of Pipe Pile Static Load Test

2021

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“…Besides soil parameters very important in pile-soil interaction are initial stress in soil and stress changes during load increase [18][19][20]. The previous research [20] pointed out that vertical, horizontal, and shear stress were increasing during the pile load test.…”

Section: Stress In Soil and Pile Technology For The Final Pile-soil I...mentioning

confidence: 99%

The Analysis of Pile Skin and Base Resistances Interaction Based on Static Pile Load Test in Experimental Research

Żarkiewicz

2023

Architecture, Civil Engineering, Environment

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Static pile load tests in laboratory conditions were carried out to study the mechanism of the pile skin and pile base resistance mobilization with settlement and their interactions. The mechanism of the skin resistance at the base is important in the correct interpretation of the pile capacity. Especially in the case of piles shallowly embedded in the bearing layer. In the studies described in this article, high-precision piezoelectric elastic stress maps were used. The tests were carried out on piles with a diameter of 2.5–2.8 cm, and length of 40 cm. Static pile load tests were carried out to measure resistance at the pile base, settlement and change of stress in the soil at the level of the pile base or beneath the pile base were measured. The analysis of stress in soil allowed to investigate the interaction between the resistances of the pile base and skin. The state of stress in the soil close to the pile base, both beneath and above the pile base level was heavily influenced by the simultaneous mobilization of skin and base resistance.

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“…The qualitative relationship between stress state and deformation and thermal infrared temperature was established from tests. Based on the natural soil as the material by using particle image velocimetry technology, 3D displacement of the soil around a laterally loaded pile was revealed [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Determination of Embedded Depth of Soldier Piles in Pile-Anchor Supporting System in Granite Residual Soil Area

et al. 2021

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Reasonable depth of pile embedment is one of the key factors for the success of deep foundation pit projects. This paper has taken a deep foundation pit project in a granite residual soil area in Shenzhen as an example and used physical model tests to study the deformation law of the piles and the surrounding soil during the excavation of the deep foundation pit, revealing the variation law of earth pressure in time and space in the pit and then verified it by numerical simulation. The influence of the embedded depth of the pile on the deformation and earth pressure of the deep foundation pit is then explicitly discussed. The study shows that the embedded depth has a significant effect on the deformation and earth pressure distribution of the foundation pit. The earth pressure in front of the pile tends to approach the passive earth pressure as the embedment depth decreases, while the earth pressure behind the pile is in between the Rankine active earth pressure and the static soil pressure; the settlement value and settlement range of the surrounding soil are doubled. The pile displacement increases as the maximum displacement point rises. The maximum displacement of the pile body was used as the basis for determining the instability of the foundation pit. The optimum embedded depth is obtained when the depth of embedment of the pile is 0.22 H (H is the excavation depth of the foundation pit).

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

Cited by 5 publications

References 24 publications

Numerical Modelling of Various Aspects of Pipe Pile Static Load Test

Numerical Modelling of Various Aspects of Pipe Pile Static Load Test

The Analysis of Pile Skin and Base Resistances Interaction Based on Static Pile Load Test in Experimental Research

Determination of Embedded Depth of Soldier Piles in Pile-Anchor Supporting System in Granite Residual Soil Area

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