Vertical vibration of a single pile embedded in a frozen saturated soil layer

Li, Qiang; Shu, Wenli; Cao, Lu; Duan, Weiwei; Zhou, Bin

doi:10.1016/j.soildyn.2019.03.032

Cited by 28 publications

(7 citation statements)

References 42 publications

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“…Liu and Zhang (2012) pointed out that the unfrozen water content and pore ice content of frozen soil change very sharply at T=0°C ~ -1°C. Even a small change in temperature will cause a large change in the unfrozen water content, and refer to the value of Li et al (2019) on the temperature of saturated frozen soil, the temperature range studied in this paper is finally determined to be T=-0.3°C ~ -0.9°C. To investigate the impact of temperature on the dynamic response of both top-soft and bottom-hard foundations and top-hard and bottomsoft foundations, and other parameters are kept unchanged (c=60m/s, 1  = 2  = 0.5, f=10Hz).…”

Section: Influence Of Temperaturementioning

confidence: 99%

“…The double-layer foundation model in the example is shown in Figure 3. Other physical and mechanical parameters of the upper and lower layers of saturated frozen soil are the same as those in Table 1 (Qiu et al, 2018;Li et al, 2019).…”

Section: Verificationmentioning

confidence: 99%

“…Carcione and Seriani (2001), Carcione et al (2000Carcione et al ( , 2003 modified the saturated frozen soil model proposed by Leclaire by further considering the coupling effect between soil particle skeleton and pore ice. At present, the research on saturated frozen soil is mostly focused on wave propagation (Jiang et al, 2023a(Jiang et al, , 2023b and the dynamic response of piles (Li et al, 2019;Cao et al, 2019;Chen et al, 2023). The layered characteristics of foundation soil are not considered.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic response analysis of layered saturated frozen soil foundation subjected to moving loads

Chen,

2024

Lat. Am. j. solids struct.

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Based on the theory of solid porous media with pores, the dynamic response of layered saturated frozen soil under uniform moving load is studied. Firstly, the governing equation of saturated frozen soil is established. Then, the Fourier integral transform is used to decouple the governing equation of saturated frozen soil, and the general solution of the potential function is obtained, and the corresponding force and displacement of each layer of saturated frozen soil are derived. Finally, using the transfer matrix method, combined with the continuous condition, the semi-analytical solution of the layered saturated frozen soil medium in the frequency domain under the surface permeable condition is derived. After verifying the accuracy of the solution by comparing the model degradation with the existing literature, the effects of soil shear modulus, load moving speed, temperature, contact parameter and frequency on the dynamic response are analyzed in detail. The results show that the order of soft and hard soil layers is of great significance to accurately evaluate the dynamic response of saturated frozen soil.

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Section: Influence Of Temperaturementioning

confidence: 99%

Section: Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic response analysis of layered saturated frozen soil foundation subjected to moving loads

Chen,

2024

Lat. Am. j. solids struct.

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“…The overlying frozen soil layer is described as a homogeneous and isotropic frozen saturated porous medium composed of soil particles, ice and water. By ignoring the interaction between the solid and the ice phases, the governing equation is [30,[36][37][38][39][40]:…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Therefore, many scholars have also paid attention to the vibration of a pile foundation in a frozen soil layer covering the upper layer of an elastic half-space. Li et al [30,31] adopted Leclaire's frozen porous medium and Biot's porous medium models to simulate frozen and unfrozen soil layers, respectively, realizing a dynamic analysis of end-bearing piles in single-and double-layer frozen porous media. They found that the properties of frozen soil have a great influence on the dynamic response of a pile foundation.…”

Section: Introductionmentioning

confidence: 99%

Semi-Analytical Solution for the Vertical Vibration of a Single Pile Embedded in a Frozen Poroelastic Half-Space

Chen

Wang

et al. 2023

Applied Sciences

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The theory of vertical pile vibration is the essential basis for pile integrity determination and dynamic analysis. The pile vibration characteristics are inevitably affected when the surrounding soil is frozen due to the low environmental temperature. Therefore, the investigation of pile vibration considering the surrounding soil as a saturated frozen porous medium is of great importance. In this paper, an analytical model for vertical pile vibration was established by employing the theory of composite saturated porous media, that is, by simplifying the upper frozen soil layer as a homogeneous isotropic saturated frozen porous medium and the foundation soil beneath the pile as an elastic half-space subjected to the motion of a rigid disk. By employing the integral transform and variable separation method, analytical solutions for the proposed model were derived under the three-dimensional axisymmetric condition. The analytical model and its solutions were verified by comparing them with the existing solutions for an end-bearing pile embedded in a homogeneously frozen soil layer as well as for a saturated half-space. A parametric study was conducted by utilizing the proposed solutions, and the results indicated that the pile bottom stiffness, the freezing temperature, the shear modulus of the unfrozen soil, etc., had a significant influence on the dynamic responses of the vertical pile vibration in both the frequency and the time domains.

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