开敞式TBM在管涔山隧道施工的适应性研究

Research on the Adaptability of Open-type TBM in the Construction of Guancen Mountain Tunnel

研究目的:根据朔准铁路穿越管涔山脉的关键控制性工程—管涔山隧道,受地形条件控制,不宜采用斜井,从而需对该隧道采用开敞式TBM施工的适应性进行研究。研究方法:结合隧道的地质、长度、断面、场地、运输组织等条件,研究TBM的适应性、施工方案、施工工期及施工风险。研究结果:管涔山隧道具备实施开敞式TBM条件。研究结论:(1)开敞式TBM能够适应管涔山隧道施工。(2)管涔山隧道可以采用TBM洞外组装、软岩地段矿山法施工、步行进洞后掘进施工方案或TBM洞内组装、直接掘进、软岩地段矿山法施工方案。(3)采用开敞式TBM施工最短工期为42.5月。(4)虽然可以采用开敞式TBM施工,但仍然存在一定的风险。

Research purposes： The construction of Guancen Mountain Tunnel was a key controlled project for Shuozhou - Zhungeer Railway to cross Guancen Mountain. The tunnel was limited by topography and not suitable to adapt inclined shaft. The research on the adaptability of open - type TBM in the tunnel was done. Research methods：With condition of geology, length, section, ground and organizing traffic, this paper studied the adaptability of TBM, constructing scheme, constructing time limit for project and constructing risks. Research results：Guancen Mountain Tunnel has conditions to use open -type TBM. Research conclusions： （ 1 ） The open - type TBM can adapt the construction of Guancen Mountain Tunnel. （2） The Guancen Mountain Tunnel may adopt the scheme that TBM was installed in outside of the tunnel , used mine construction in soft rock sector, walked into tunnel to dig or that TBM was installed into the tunnel and dig directly, used mine construction in soft rock sector. （3） The constructing least time limit for the project is 42.5 months to adopt open -type TBM in Guancen Mountain Tunnel. （4） The Guancen Mountain Tunnel can adopt open - type TBM to construct, but there are some constructing risks.