小净间距交叉隧道振动规律试验研究

Test and study on vibration pattern of cross tunnels with short clear spacing distance

随着国家路网建设规模的不断扩大,铁路、公路隧道出现近接平行、交叉的现象越来越普遍。受地形等因素的影响,交叉隧道的净间距也在不断减小,由此产生的工程问题逐渐变得复杂。文章以丹大铁路中的草莓沟2#隧道为例(该隧道下穿盘道岭公路隧道),开展6种不同加载工况下的振动台试验,输入地震波峰值分别为0.1 g、0.15 g、0.2 g、0.3 g、0.4 g、0.6 g,重点分析在盘道岭公路隧道的影响下,草莓沟2#隧道加速度峰值响应特征,研究成果将为近接隧道设计与施工提供良好的经验。

With the continuous growth of the national road network construction,it is more and more common for railway and highway tunnels to be close,parallel and cross.Due to the impact of terrain and other factors,the clear spacing distance of cross tunnels is also shorter and shorter,and these aroused engineering problems are becoming more and more complex.This paper takes the Caomeigou Tunnel 2 of Dandong-Dalian railway as an example(the tunnel undergoes Pandaoling highway tunnel),and it takes the vibration test rig under six different loading conditions,and the input seismic wave peak values are 0.1 g,0.15 g,0.2 g,0.3 g,0.4 g and 0.6 g respectively.It mainly analyzes the acceleration peak response characteristics of Caomeigou Tunnel 2 under the impact of Pandaoling highway tunneling.The research results will be good experience references for similar neighboring tunnels in future design and construction.