三孔小净距隧洞下穿既有铁路列车振动荷载动力响应研究

区域物流服务业是区域经济的重要组成部分，也是促进区域经济全面健康发展的保障。当前我国区域经济发展过程中对区域物流服务业绩效评价问题重视程度不够，对物流服务业的绩效缺乏正确认识。本文以生态文明为导向对区域物流业的绩效进行评价，结合生态文明的思想，科学、合理设置区域物流绩效评价指标体系，选择合理的评价方法，并通过反馈评价结果促进区域物流绩效水平的改进，进而促进区域经济发展及生态环境的改善。

Dynamic Response of Three Pipes Small Spacing Tunnels Under Train induced Dynamic Load

Based on three pipes small spacing tunnels underneath existing railway, the dynamic response of roadbed and ground and primary support is studied by numerical method. The calculated work conditions of dynamic analysis model include initial normal driving speed condition, primary support normal and driving speed condition and primary support slow driving speed condition. The results show that the train vibration inevitably brings adverse effect to construction tunnel, and causes additional displacement and stress to the primary support. The adverse effect can be reduced by adopting reinforcement measures of ground and slow driving speed of train.