数値シミュレーションを用いた列車走行に伴う地盤振動の低減対策の提案方法

Noyori, Masanori; Yokoyama, Hidefumi

doi:10.2208/jscejj.22-00197

Cited by 1 publication

(4 citation statements)

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“…From these results, we can see that the ground is prone to vibration propagation above the frequency of 20 Hz approximately. Comparing the value of the characteristics at the frequency around 23 Hz, the value at the frequency around 20 Hz is approximately 0.8 times and the value at the frequency around 16 Hz is approximately 0.3 times. Therefore, it is considered that the large ground vibration at the frequency band of 20 Hz is affected by the characteristics.…”

Section: (1) Investigation Of the Methods For Primary Factor Extracti...mentioning

confidence: 89%

“…To estimate S-wave velocity profiles of the surface ground, multichannel analysis of surface waves (MASW) 17) and array microtremor observation 18) were carried out. 16) In the MASW, we used geophones, whose natural frequency was 4.5 Hz (GS-11D, Geospace), connected with an exploration seismograph (Geode, Geometrics). An arrangement of the geophones is shown in Fig.…”

Section: Surveys Of Soil Properties Of the Surface Ground 16)mentioning

confidence: 99%

“…5. 16) Therefore, the investigation in the following chapters was carried out using the average S-wave velocity profiles shown in Fig. 5.…”

Section: Surveys Of Soil Properties Of the Surface Ground 16)mentioning

confidence: 99%

“…Fig 16. Simulation results calculated by the model that changed the property or the structural form of the parts.…”

mentioning

confidence: 99%

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A Method for Suggesting Countermeasures for Train-Induced Ground Vibrations Using Numerical Simulation

NOYORI,

YOKOYAMA

2024

Journal of JSCE

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There have been many studies on countermeasures for train-induced ground vibration. However, many of the countermeasures are not clear about the mechanisms and reduction values of the vibration. Therefore, in general, we choose the countermeasures based on previous cases or empirical judgments. In this paper, using a numerical simulation consisting of a running train, tracks, supporting structures, and the ground, we investigated a method for extracting primary factors of the train-induced ground vibration and a method for suggesting countermeasures based on the primary factors. The results showed that it is possible to extract the primary factors, which increased the train-induced ground vibration, by evaluating the characteristics of vibration source, vibration characteristics of viaducts, and propagation characteristics of the ground. This study presents a flowchart showing how the primary factors are linked to the countermeasures.

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Section: (1) Investigation Of the Methods For Primary Factor Extracti...mentioning

confidence: 89%

Section: Surveys Of Soil Properties Of the Surface Ground 16)mentioning

confidence: 99%