太旧高速北茹隧道改扩建方案比选研究

Research on Comparison and Selection of Reconstruction and Expansion Schemes of Beiru Tunnel on Taijiu Expressway

综合考虑北茹隧道的现状、洞外接线条件、建设标准、改扩建难易程度、交通量及组成、施工交通组织及运营安全等因素,对隧道分离增建、原位扩挖及其组合等多种方案的经济技术进行了比选,确定了“单洞改建+单洞原位扩建+分离增建”的隧道改扩建方案,可供同类工程参考。

Comprehensively considering factors such as the current situation of Beiru Tunnel,the wiring condition outside the tunnel,the construction criteria,the reconstruction and expansion difficulty,the traffic flow and composition,construction traffic organization,and operation safety,this paper compared the economy and technologies of various schemes of tunnel separation expansion,in-situ excavation,and their combinations.The tunnel reconstruction and expansion scheme of"single-hole reconstruction+single-hole in-situ expansion+separation expansion"was adopted,which can provide a reference for similar engineering.