道路交通所致基坑内振动衰减规律实测与分析
The Measured and Analyzed Attenuation Law of Vibration in Foundation Pits Induced by Road Traffic
摘要: 近年来，城市交通道路越来越密集，精密仪器对振动控制的标准愈加严格。本文所依托工程项目对振动控制要求极为严格，为达到结构基础微振动的控制标准，实测了地表道路交通对10 m深基坑的振动特性响应，分别实测了小轿车在20 km/h、30 km/h、40 km/h三种不同车速下的振动时程曲线，获得模型输入振源，得到道路交通荷载作用下所致基坑内振动响应随距离的衰减规律。
Abstract: In recent years, urban traffic roads have become increasingly congested, and the standards for vibration control of precision instruments have become more stringent. The engineering project on which this paper is based has extremely strict vibration control requirements. To meet the micro-vibration control standards for structural foundations, the vibration response of a 10-meter-deep foundation pit to surface road traffic was measured. The vibration time history curves for a passenger car at three different speeds (20 km/h, 30 km/h, and 40 km/h) were measured to obtain the model input excitation sources. This allowed the identification of the attenuation law of the vibration response in the foundation pit under road traffic loads as a function of distance.
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