某物流园建设对既有襄渝Ⅱ线隧道影响分析

Effect of the Construction of the Logistics Park in Shiyan City on a Xiangyu Second Line Tunnel

十堰市拟建林安物流园园区下方为既有襄渝II线的伏龙口2号隧道,物流园区的建设会对隧道安全造成一定影响。利用数值模拟分析园区建设对既有隧道的影响,分析结果认为园区内规划建筑物荷载对既有隧道安全影响微弱,而园区场地整平形成的填方荷载会对隧道的稳定性形成严重的威胁,如需填土,建议采用桩板结构或拱形支撑结构将填方荷载转移到隧道两侧。分析结果能为林安物流园的建设提供重要的依据,也为类似工程建设提供有价值的参考。

The Lin＇an Logistics Park in Shiyan City is now under construction.When it is completed,it will be the largest automobile accessary supply center in Asia.The Fulongkou No.2Tunnel,which is the tunnel for the existing Xiangyu Second Rail Line,is underneath the park.The effect of the logistic park construction on the safety of operation of the railway tunnel is studied in this paper.The impact of the construction activities of the park on the stability of the tunnel is numerically simulated.The results indicate that the proposed building has minimal impact on the existing tunnel,however,the proposed earthwork（fill）will has a significant impact on the stability of the tunnel.It is suggested that constructing the arch structure or using the sheet pile wall to spread the vertical fill load to both sides of the tunnel if the fill operation has to be conducted.