Mitigation of Vibrations Caused by Dynamic Compaction Considering Soil Nonlinearity

Abedini, Farzaneh; Rafiee-Dehkharghani, Reza; Laknejadi, K.

doi:10.1007/s40999-022-00700-9

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…In the past several decades, researchers have been focused on developing various methods to mitigate vibration induced by surface waves. Wave barriers such as multi-row of piles [1,2] and trenches [3][4][5][6] have been widely used in practical engineering because of their low cost and good performance. Since periodic theory was introduced into civil engineering [7,8], a number of groups have paid attention to the application of periodic wave barriers (PWBs) in ambient vibration reduction and many important achievements have been obtained, e.g.…”

Section: Introductionmentioning

confidence: 99%

Surface wave mitigation by periodic wave barriers under a moving load: theoretical analysis, numerical simulation and experimental validation

Ni,

Shi

2024

Phil. Trans. R. Soc. A.

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Periodic wave barriers (PWB) open a new window for vibration mitigation. However, the Doppler effect is rarely considered in most of the previous investigations on the control of ambient vibration induced by moving loads. This article reveals the significance of the speed and frequency of moving loads on surface waves, and improves the design method of PWB for ambient vibration reduction and isolation. First, the theoretical expression of the main frequency band of surface waves propagating in an elastic half-space caused by a moving load was obtained. Comparisons with the numerical results under three different types of traffic loads were also conducted and good agreement was found. Second, the theoretical expression and numerical results were verified by experimental studies. Some inherent properties of wave propagation caused by a moving load in an elastic half-space were also revealed. Third, two kinds of PWBs, i.e. periodic empty trench barrier and periodic pile barrier, were introduced to mitigate wave propagation. It has been confirmed that if the attenuation zones of PWB match the target frequency bands given by the theoretical expression, good vibration mitigation can be achieved. This article is part of the theme issue ‘Current developments in elastic and acoustic metamaterials science (Part 1)’.

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Section: Introductionmentioning

confidence: 99%

Surface wave mitigation by periodic wave barriers under a moving load: theoretical analysis, numerical simulation and experimental validation

Ni,

Shi

2024

Phil. Trans. R. Soc. A.

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“…As a systematic engineering, the following parameters need to be considered in the design of dynamic compaction: the size of the hammer, the energy level of dynamic compaction, the spacing and arrangement of compaction points, the number of strikes, the standard of hammer retraction, the crater depth, the effective reinforcement depth, and the influence range of dynamic compaction. Since dynamic compaction involves complicated transient dynamic response issues, studies on dynamic compaction are mainly conducted by numerical simulations [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], model tests [21][22][23], and field tests [24][25][26][27][28][29][30][31][32]. Numerical simulation methods adopted by scholars principally include the finite element method (FEM) [4][5][6][7][8][9][10][11], finite difference method (FDM) [12][13][14], discrete element method (DEM) [15,16], and coupling calculation of various numerical simulation methods [17]…”

Section: Introductionmentioning

confidence: 99%

“…Since dynamic compaction involves complicated transient dynamic response issues, studies on dynamic compaction are mainly conducted by numerical simulations [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], model tests [21][22][23], and field tests [24][25][26][27][28][29][30][31][32]. Numerical simulation methods adopted by scholars principally include the finite element method (FEM) [4][5][6][7][8][9][10][11], finite difference method (FDM) [12][13][14], discrete element method (DEM) [15,16], and coupling calculation of various numerical simulation methods [17][18][19][20]. Wang et al [4] established a 2D axisymmetric numerical model in LS-DYNA to investigate the influence of dynamic c...…”

Section: Introductionmentioning

confidence: 99%

Study on the Reinforcement Mechanism of High-Energy-Level Dynamic Compaction Based on FDM–DEM Coupling

et al. 2023

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The high-energy-level dynamic compaction method is widely used in various foundation treatment projects, but its reinforcement mechanism still lags behind the practice. In view of this, a three-dimensional fluid–solid coupling dynamic analysis model was established on the basis of the FDM–DEM coupling method. The variation trends of crater depth, soil void ratio, vertical additional dynamic stress, and pore water pressure during the process of dynamic compaction were analyzed. The results indicate that the curvature of the crater depth fitting curve gradually decreases with the increase in strike times, tending to a stable value. The initial particle structure is altered by the huge dynamic stress induced by dynamic compaction. As strike times increase, the soil void ratio decreases gradually. The vertical additional dynamic stress is the fundamental reason resulting in foundation compaction. Precipitation preloading before dynamic compaction can improve the reinforcement effect of dynamic compaction, making up for the deficiency that the vertical additional dynamic stress attenuates rapidly along the depth direction. The simulated CPT results illustrate that the modulus of foundation soil can be increased by 3–5 times after dynamic compaction. The research results can provide important reference for similar projects.

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Three-dimensional optimization of wave barriers for mitigating ground vibrations induced by underground train

Sadeghi,

Rafiee-Dehkharghani,

Laknejadi

2023

Environ Sci Pollut Res

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Mitigation of Vibrations Caused by Dynamic Compaction Considering Soil Nonlinearity

Cited by 5 publications

References 27 publications

Surface wave mitigation by periodic wave barriers under a moving load: theoretical analysis, numerical simulation and experimental validation

Surface wave mitigation by periodic wave barriers under a moving load: theoretical analysis, numerical simulation and experimental validation

Study on the Reinforcement Mechanism of High-Energy-Level Dynamic Compaction Based on FDM–DEM Coupling

Three-dimensional optimization of wave barriers for mitigating ground vibrations induced by underground train

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