Stereo particle image velocimetry measurement of 3D soil deformation around laterally loaded pile in sand

Yuan, Bingxiang; Chen, Wenwu; Jiang, Tong; Wang, Yixian; Chen, Keping

doi:10.1007/s11771-013-1550-7

Cited by 22 publications

(7 citation statements)

References 16 publications

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“…The different responses of the soil at different locations are due to the different stress states at the locations with respect to the pile: soil is mostly in compression ahead of the pile, mostly in extension behind the pile and in a state approximating simple shear on the sides of the pile. The pattern of the profile for the soil displacement at the ground surface matches the DIC observations by [34]. In contrast, when the soil is modeled as an elastic material, the displacement profile at the ground surface, as plotted in Figure 10(b), is symmetric with respect to both the x and y axes.…”

Section: Bending Moment and Shear Force Profilessupporting

confidence: 66%

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Nonlinear analyses of laterally loaded piles – A semi-analytical approach

Han

Salgado

Prezzi

2015

Computers and Geotechnics

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This paper describes a semi-analytical, continuum mechanics-based method of calculating the nonlinear response of pile foundations subjected to lateral loads. The displacement field in the soil is obtained as the product of a pile deflection function and displacement decay functions. Based on the incremental form of the virtual work, a system of coupled differential equations for the pile deflection and decay functions is derived and then solved by using the finite difference method, producing pile deflections, shear forces and bending moments as well as displacements within the soil domain. The soil is modeled as an elasto-plastic material. The analysis is computationally efficient and produces results that are in good agreement with those from 3D finite element modeling with the same constitutive model for the soil. The method models laterally loaded pile response more realistically than the traditional p-y method at a comparable computational cost. The method is substantially more efficient than 3D finite element simulations. The proposed method offers a good alternative to the p-y method in contexts in which fast calculation of lateral pile response is required, such as in the design of piles for offshore wind farms.

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Section: Bending Moment and Shear Force Profilessupporting

confidence: 66%

“…The plastic multiplier  can be solved by substituting the flow rule [Eq. (34) or Eq. 4 2 2 000 3 3 3 2 4 2 000 3 3 3 2 2 4 000 3 3 3 0 0 0 2 0 0 0 0 0 0 2 0 0 0 0 0 0 2 2 2 2 2 2 2…”

Section: Formulation Of the Tangential Stiffness Matrixmentioning

confidence: 99%

Nonlinear analyses of laterally loaded piles – A semi-analytical approach

Han

Salgado

Prezzi

2015

Computers and Geotechnics

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“…Thus, so far, the applications of Stereo-PIV have broadened. Yuan et al [ 13 ] measured 3D sand displacements around a single pile using the Stereo-PIV technique. However, limited case studies of Stereo-PIV applications have been reported in geotechnical engineering because of the high cost of a commercial system and its complicated implementation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Passive Pile on 3D Ground Deformation and on Active Pile Response

Yuan

Chen

Teng

et al. 2014

The Scientific World Journal

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Using a series of model tests, this study investigated the effect of a passive pile on 3D ground deformation around a laterally loaded pile and on that laterally loaded pile's response in sand. The active pile head was subjected to lateral loads, and the passive pile was arranged in front of the active pile. In the model tests, the distance between the two pile centers was set to zero (i.e., a single pile test), 2.5, 4, and 6 times the pile width (B). The 3D ground surface deformations around the active and passive piles were obtained using a newly developed Stereo-PIV technique. The experimental results showed that the ground surface movements were restrained by the passive pile when the pile spacing was less than 6B. The response of the active pile was affected by the passive pile when the pile spacing was less than 4B. This study combined the response of the active pile and surrounding 3D ground deformation to investigate the effect of the passive pile, which is useful to further understand the pile-soil-pile interactions and to enhance pile foundation design in engineering practice.

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“…White et al 9,10) of Cambridge University developed GeoPIV, a PIV analysis software suitable for geotechnical deformation measurement, for analyzing soil deformation in soil and geotechnical model, and experiments show that this method is simple in operation and accurate in measurement. Tsuha et al 11) , Yuan et al 12) and Cao et al 13) measured two and three dimensional deformation of soil around piles with PIV technique with success. Wang 14) proposed a method to improve the deformation measurement accuracy of clay by using carbon particles.…”

Section: Introductionmentioning

confidence: 99%

Quick identification of expansive soil in the field based on PIV technique

Hou

et al. 2019

JGS Special Publication

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On-site quick identification of the degree of expansion of expansive soil is of great significance to practical engineering. A set of expansive soil identification device was developed based on Particle Image Velocimetry (PIV) technique, which can provide a constant temperature environment and stable image acquisition conditions under outdoor environment. This device was used to carry out laboratory tests on remolded expansive soils, and to establish a method of quick identification of the degree of expansion of expansive soil based on PIV technique. The results show that the average displacement of all the pixels in the sample first increases and then decreases in a certain period of time, and thereafter tends to be stable in the later stage of the experiment. The mean value of displacement increment (MVDI) was used as the criterion to judge the stability of the sample displacement when it was less than 0.01 mm for two consecutive times. The mean value of the accumulated displacement increment (MVADI) before the displacement stabilization of samples with different degrees of expansion shows a positive correlation with the free swell index under the same initial state (i.e., density and moisture content) of the sample. Undisturbed expansive soils were taken for field tests, and the relation between the MVADI and the free swell index obtained from standard testing procedure was established, which is consistent with the results of laboratory tests.

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Stereo particle image velocimetry measurement of 3D soil deformation around laterally loaded pile in sand

Cited by 22 publications

References 16 publications

Nonlinear analyses of laterally loaded piles – A semi-analytical approach

Nonlinear analyses of laterally loaded piles – A semi-analytical approach

Effect of Passive Pile on 3D Ground Deformation and on Active Pile Response

Quick identification of expansive soil in the field based on PIV technique

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