Influence of Contents of Fine Particles in Marine Soil on Dynamic Stability of Wharfs

LYU Chuanli; HAN Qiting; WANG Yi; WANG Qigui

doi:10.13204/j.gyjzG22060620

Volume 53 Issue 6

Jun. 2023

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LYU Chuanli, HAN Qiting, WANG Yi, WANG Qigui. Influence of Contents of Fine Particles in Marine Soil on Dynamic Stability of Wharfs[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 19-24. doi: 10.13204/j.gyjzG22060620

Citation:

LYU Chuanli, HAN Qiting, WANG Yi, WANG Qigui. Influence of Contents of Fine Particles in Marine Soil on Dynamic Stability of Wharfs[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 19-24. doi: 10.13204/j.gyjzG22060620

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Influence of Contents of Fine Particles in Marine Soil on Dynamic Stability of Wharfs

doi: 10.13204/j.gyjzG22060620

1. Zhejiang Huadong Surveying and Engineering Safety Co., Ltd., Hangzhou 310014, China;
2. Zhejiang Huadong Construction Engineering Co., Ltd., Hangzhou 310014, China

Received Date: 2022-06-06
Available Online: 2023-08-18

Abstract

Abstract

A series of triaxial consolidated undrained shear tests were conducted on marine soil with different contents of fine particles, and the influence of contents of fine particles on nonlinear deformation properties of marine soil was obtained. The results indicated that when the content of illite was between 0% to 18%, the maximum strength of soil was in the illite content of 12%. When it was less than 12%, the properties of soil were mainly determined by sandy soil, and the deformation of the soil exhibited strain-softening properties. When the illite content was more than 12%, the properties of soil were dominated by the illite content, which exhibited strain-hardening properties. Coupled with the nonlinear deformation characteristics of different contents of fine particles in marine soil, a three-dimensionally numerically dynamic response model for a foundation-pile-superstructure under wave dynamic loads was constructed. The analysis results indicated that when the peak strength of soil was larger, the deformation of strain-softening characteristics would cause more serious damage to wharfs. When the peak strength was lower, the deformation of strain-hardening characteristics would cause more serious damage to wharfs. At the same peak strength, the peak values of the maximum equivalent stress and the maximum shear stress in the dock panels on the hardened foundation were larger than that on the softened foundation, and the stress of the dock panel on the foundation with low peak strength of the foundation soil was larget than that on the foundation with high peak strength. In the foundation with the same peak strength, the maximum stress of strain-softening soil foundation was larger than that of strain-hardening soil foundation, the larger the stress in foundation soil, the smaller the peak strength was. It indicated that the fine particle content of marine soil had a significant impact on the dynamic stability of wharfs, and the nonlinear responses of foundation soil with different mechanical properties should be considered in design.
- sandy soil,
- illite,
- nonlinear deformation,
- numerical simulation

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References(14)

References

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