Train-Induced Building Vibration and Radiated Noise by Considering Soil Properties

Chao Zou,Ziyu Tao,Yimin Wang

doi:10.3390/su12030937

Chao Zou, Ziyu Tao + Show 1 more

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https://doi.org/10.3390/su12030937

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Abstract

Constructing buildings above subway tracks exploits urban-area space intensively by adopting the three-dimensional overlapping development mode, which is one of the important measures for solving the contradictions among urban population increase, land resource shortage, and environmental protection. However, the vibration generated by the frequent train operations is transmitted to the upper buildings through the track structure and ground soil, which can cause structural vibrations and radiated noise and bring physical and mental side effects to occupants within the buildings. Subway projects are often located in geologically sensitive areas, while the influences of the encountered geological problems on the generation and propagation of structural vibration and structure-radiated noise within the buildings are not yet clear. Hence, this paper presents a method of studying the train-induced vibration transmission from the ground up into the buildings and the structure-radiated noise within the building. The method consists of a train-track model, track-soil-building model, and structure-radiated noise simulation. The impact of soil properties on the building vibration and structure-radiated noise is analyzed and ground-improvement measures are proposed in order to mitigate vibration and structure-radiated noise within buildings. The results show that the interaction between soil and structure has a great impact on vibration transmission from the ground into the building. Good foundations reduce vibration transmission from ground soil up into the building and lead to a lower level of structure-radiated noise. Ground improvements increase the impedance of ground soil, thereby weakening the vibration transmission and lowering the structure-radiated noise.

Highlights

In the process of urban development and expansion, a city should adopt efficient, energy-saving, and environmentally friendly urban transportation systems and intensive development strategies against traffic congestion, environmental deterioration, and encroachment on arable land
The purpose of this study is to explore the train-induced vibration transmission from the ground up into the building and the structure-radiated noise within the building
The dynamic interaction between the train and track structure generates vibrations which are transmitted to the surrounding soil and to the surrounding buildings, resulting in building vibrations and structure-radiated noise

Summary

Introduction

In the process of urban development and expansion, a city should adopt efficient, energy-saving, and environmentally friendly urban transportation systems and intensive development strategies against traffic congestion, environmental deterioration, and encroachment on arable land. The three-dimensional overlapping development of urban space gains its importance. The construction of buildings above subway tracks is a mode of three-dimensional overlapping development of urban space [2]. Train-induced vibrations will transmit into the buildings and cause radiated noise from indoor structures or furniture [4,5]. The energy, in the form of vibration waves, transmits from

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