Method for estimating initial excess pore pressure during pile jacking into saturated fine-grained soil

Dou, Jinzhong; Chen, Jin-Jian; Liao, Chencong

doi:10.1016/j.compgeo.2019.103203

Cited by 8 publications

(10 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerical modeling of the pile installation process into saturated soil usually encounters nonlinear material behavior, pore water effect, and pile-soil frictional interaction, as well as large mesh deformation. The solutions for the above problems have been described in detail by Dou et al [10], and a brief explanation will be provided in this article.…”

Section: Numerical Modelmentioning

confidence: 99%

“…The cap model, which is based on the idea of Drucker [34], is applied to capture the non-linear behavior of the soil constituent [10,32,35]. One of the major advantages of the cap model over other classical pressure-dependent plasticity models such as the Drucker-Prager and Mohr-Coulomb models is the ability to control the amount of dilatancy produced under shear loading.…”

Section: Soil Model Descriptionmentioning

confidence: 99%

“…It is generally acknowledged that a positive EPWP field will exist along the pile shaft and ahead of the pile tip during pile installation, which decreases effective stress of the surrounding soil; after pile installation, the dissipation of EPWP increases effective stress of soil immediately around the pile, and the pile set-up predominantly occurs. However, some studies [6,10,11] have indicated that the negative EPWP, which is counterproductive to the pile set-up, occurs near the ground surface and at a certain depth below the pile tip. The negative EPWP induced by pile jacking is easily ignored in the field data due to the limited precision and quantity of piezometers.…”

Section: Introductionmentioning

confidence: 99%

“…However, the ALE or CEL method is limited to total stress analysis in commercially available software, and a user subroutine is needed to consider the pore water effect [26][27][28][29], which requires outstanding programming skills [30]. Given this situation, a hybrid Lagrangian-ALE approach, which combines the advantages of the Lagrangian and ALE or CEL approaches, comes into view [10,31,32]. This method is applied to simulate the undrained pile jacking in saturated fine-grained soil, which can not only solve the mesh distortion near the pile-soil interface, but also obtain the EPWP response of far field soil around pile.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Study on the Correlation between Soil Consolidation and Pile Set-Up Considering Pile Installation Effect

Dou

Chen

Liao

et al. 2021

JMSE

Self Cite

View full text Add to dashboard Cite

In saturated fine-grained soil, the development and dissipation of excess pore water pressure (EPWP) during and after pile jacking change the effective stress of the surrounding soil, and thereby affect the pile set-up. In this paper, the entire process of steel-pipe pile jacking (the installation process and the subsequent consolidation phase) is simulated with three-dimensional (3D) finite element models, considering the pore water effect. After the model verification, a comprehensive numerical analysis was performed to investigate the development and dissipation of EPWP, changes in soil stress state, and the side shear resistance of pile with time after installation. On this basis, not only the influence of ks, cu, E, and OCR on EPWP generation during pile jacking and subsequent soil consolidation effect after pile installation but also the correlation between pile set-up and EPWP dissipation is investigated.

show abstract

Section: Numerical Modelmentioning

confidence: 99%

Section: Soil Model Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study on the Correlation between Soil Consolidation and Pile Set-Up Considering Pile Installation Effect

Dou

Chen

Liao

et al. 2021

JMSE

Self Cite

View full text Add to dashboard Cite

show abstract

“…After the pad was added, the starting force was greater than the pile pressing force before the pad. Excess pore water pressure was generated when the soil around the pile was disturbed, and a water film was generated between the pile and the soil [19]. The model pile was in a standing state when adding cushions, and the water film reduced slightly when the pile was standing.…”

Section: Variation Law Of Pile Pressure With Penetration Depthmentioning

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

View full text Add to dashboard Cite

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.

show abstract

Set-up effect of large-diameter open-ended thin-walled pipe piles driven in clay

Qin

Gao

Chang³

et al. 2023

Computers and Geotechnics

View full text Add to dashboard Cite

Method for estimating initial excess pore pressure during pile jacking into saturated fine-grained soil

Cited by 8 publications

References 71 publications

Study on the Correlation between Soil Consolidation and Pile Set-Up Considering Pile Installation Effect

Study on the Correlation between Soil Consolidation and Pile Set-Up Considering Pile Installation Effect

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

Set-up effect of large-diameter open-ended thin-walled pipe piles driven in clay

Contact Info

Product

Resources

About