Effects of Open Trench Dimension on Screening Effectiveness for High Speed Train Induced Vibration

Tsai, Pei Hsun

doi:10.4028/www.scientific.net/amm.256-259.1187

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…The research results of this paper are consistent with the existing research results on the vibration isolation performance of the damping ditch [22][23][24]. Various experimental results, theoretical analysis results and numerical simulation results show that the vibration isolation effect of the damping ditch mainly depends on the depth of the barrier.…”

Section: Discussionsupporting

confidence: 89%

Effect of damping ditch on blasting vibration reduction by field experiment and numerical simulation

Niu¹,

Xie²,

Zhang³

et al. 2022

J. vibroeng.

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In order to analyze the influence of a damping ditch on the blasting vibration, a large number of on-site monitoring tests with or without damping ditch were carried out based on the foundation pit excavation project. Based on the Sadovsky’s empirical formula, the optimized vibration velocity attenuation model was established by using the waveform subsection correspondence method and least square method. The calculation results are in good agreement with the measurement results. The average errors in radial direction and vertical direction are 17.04 % and 10.76 % respectively. A series of finite element models were established to study the influence of the damping ditch geometry on the damping effect. The experimental and numerical results show that the damping ditch can obviously reduce the blasting seismic effect, with the highest damping ratio in the area near blasting source. For different damping ditches, the damping ratio first increases and then decreases proportionally to the increase of distance between the measuring point and the blasting zone. The damping ditch depth has the best damping effect on blasting vibration, followed by the distance between the damping ditch and the blasting source, and finally the damping ditch width, which is consistent with the damping mechanism of theoretical analysis. The attenuation of the surface wave is only related to the damping ditch depth. The research results can provide a reference for the design of blasting vibration isolation.

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Section: Discussionsupporting

confidence: 89%

Effect of damping ditch on blasting vibration reduction by field experiment and numerical simulation

Niu¹,

Xie²,

Zhang³

et al. 2022

J. vibroeng.

View full text Add to dashboard Cite

show abstract

“…With [3] studied the isolation effect of vibration isolation measures on far-field vibration caused by trains. Since then, scholars have analyzed the vibration isolation efficiency of empty trench and concrete infilled trench in the uniform half-space foundation [4][5][6][7][8][9], the layered half-space foundation [10][11][12][13][14][15], the homogeneous saturated foundation [16][17][18][19][20][21][22], and the layered saturated soil foundation under moving loads.…”

Section: Introductionmentioning

confidence: 99%

Vibration Isolation of a Rubber-Concrete Alternating Superposition In-Filled Trench for Train-Induced Environmental Vibration Based on 2.5D Indirect Boundary Element Method

et al. 2021

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A new train-induced vibration isolation measure of rubber-concrete alternating superposition in-filled trench is presented in this paper. For analyzing the vibration isolation effect of the new measure, this paper establishes a 2.5D train-track-layered foundation-filled trench model to analyze the dynamics of track and layered foundation with the in-filled trench. The correctness of the model is verified by using the measured data of the Sweden X-2000 high-speed train. The vibration isolation effect of the rubber-concrete alternating superposition in-filled trench is calculated by using the actual soft soil foundation parameters of the X-2000 high-speed train, and the vibration isolation effect is also compared with that of the empty trench, rubber in-filled trench, and concrete in-filled trench. The results show that the vibration isolation effect of the rubber-concrete alternating superposition in-filled trench proposed in this paper is better than that of the C30 concrete in-filled trench, especially the impact on displacement. Compared with low-frequency vibrations generated by the lower train speed, the rubber-concrete alternating superposition in-filled trench has a better vibration isolation effect on high-frequency vibrations caused by higher-speed trains. The rubber-concrete alternately superposition in-filled trench has the frequency band characteristics of elastic waves. Elastic waves in the passband frequency range can propagate without attenuation, while the elastic waves in the forbidden frequency range will be filtered out.

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“…Gao et al [9] established 2.5D finite element model of train-track-ground-vibration countermeasures and analyzed the effectiveness of different vibration countermeasures including open trench, in-filled trench and concrete slab in isolating the ground vibrations induced by trains moving at sub-and high-speeds. Other researches in this area in recent years are carried out by Hildebrand [10], Yang et al [11], Jesmani et al [12], Tsai [13], and Zakeri et al [14]. In a recent study, Kim [15] studied the characteristics and the reduction methods of ground vibration due to the tilting train.…”

Section: Introductionmentioning

confidence: 99%

Reduction of train-induced vibrations by using a trench in a layered half-space

Ba¹,

Wang²,

Liang³

2016

J. vibroeng.

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A coupled model of a track-layered ground-in-filled trench system is developed to investigate the isolation effects of an in-filled trench on reducing vibrations generated by moving train loads. By using the substructure method, the whole model is decomposed into two parts: the layered ground containing the in-filled trench and the track. Firstly, the flexibility coefficient for moving uniformly distributed loads applied on the layered ground containing the trench is obtained by using the 2.5D indirect boundary element method. Then, the dynamic equilibrium equation of the track under the moving train loads and uniformly distributed loads are established. Finally, the layered ground and the track are coupled according to the equivalence between the deformation of the track and the vertical displacement of the layered ground. The validity of the method is confirmed by comparing its results with the published ones. Numerical calculations are performed by embedding an in-filled trench in a homogenous ground, in a single layered ground and also in the real site at Ledsgard as examples. The results show that the isolation effects are different for different ground conditions and for different geometric parameters such as the depth, width and location of the in-filled trench.

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Effects of Open Trench Dimension on Screening Effectiveness for High Speed Train Induced Vibration

Cited by 4 publications

References 3 publications

Effect of damping ditch on blasting vibration reduction by field experiment and numerical simulation

Effect of damping ditch on blasting vibration reduction by field experiment and numerical simulation

Vibration Isolation of a Rubber-Concrete Alternating Superposition In-Filled Trench for Train-Induced Environmental Vibration Based on 2.5D Indirect Boundary Element Method

Reduction of train-induced vibrations by using a trench in a layered half-space

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