宁波轨道交通轨道振动预测研究及优化

在轨道交通初步设计阶段地下线轨道减振设计中,对距外轨中心线两侧10~60 m范围内的环境敏感点,往往采用踏勘、工程类比等经验方法进行设计,具有一定的误差。在采用《环境影响评价技术导则城市轨道交通》(HJ453—2008)振动预测模型的基础上,参考北京、上海等城市的经验,研究适用于宁波轨道交通地下线轨道振动预测模型,并采用计算机语言实现预测模型程序化以提高设计效率。在初步设计阶段,振动预测的标准化、自动化,对稳定区间轨道高度,细化概算投资,减少设计反复具有重要意义。

Research and Optimization of Track Vibration Prediction of Ningbo Rail Transit

In the vibration-reduction design of underground track at preliminary design stage of urban rail transit,the reconnaissance,engineering analogy and other empirical methods are often adopted to address the environmentally sensitive points within the range of 10 ~ 60 m away from the outer rail on both sides of the center line,which may have a certain error. Based on vibration-reduction model of Guidelines,this paper is to study the vibration-reduction methods applied to underground track of Ningbo rail transit with reference to the experiences of Beijing,Shanghai and other cities,and use computer language to fulfill programmed prediction model for better design efficiency. At the preliminary design stage,standardization and automation of vibration prediction play an important rule in stabilizing track structure height,and specifying investment budget,and reducing repeated design.