摘要
以宁波轨道交通3号线下穿杭深线工程为背景,通过数值模拟的方法,对盾构隧道下穿既有铁路的施工技术和安全性影响进行了分析,研究结果表明,在盾构推进期间,将地层损失率控制在0.8%及以下的情况时,由沉降导致的轨道不平顺没有超过限值,施工中可以不采用主动加固措施,但需采取其他防护措施以确保铁路行车安全。
Taking the undercrossing Hangzhou-Shenzhen Railway project of No. 3 Line of Ningbo rail traffic as the example,the paper analyzes the construction technique and safety influence of the shield tunnel＇s undercrossing existing railway according to the numeric simulation method,proves by the research result that the ground loss ratio can be controlled less than 0. 8% during the shield advance,and the rail irregularity caused by the settlement is within the limited value,indicates the active consolidation measures can not be adopted,but other protection measures can be adopted,so as to ensure the railway traffic safety.
出处
《山西建筑》
2016年第12期175-177,共3页
Shanxi Architecture
关键词
盾构隧道
铁路
路基沉降
轨道
shield tunnel
railway
roadbed settlement
rail
