隧道二次衬砌矮边墙与边拱一次灌注施工技术

Construction Technologies for Secondary Lining of the Low Wall and Primary Filling of the Side Arch of Tunnel

研究目的:在回顾隧道施工方法的基础上,探讨隧道二次衬砌施工方法的改进与创新的必要性,并简述通过技术创新得出的隧道二次衬砌矮边墙与边拱一次整体灌注的施工工艺及方法,从而提高混凝土质量,降低工程成本。研究结论:改进和创新后的铁路隧道二次衬砌施工方法,其特点是二次衬砌整体灌注,减少了矮边墙(小边墙)立模、灌注混凝土的工序,基本可以解决二次衬砌外观质量差以及二次衬砌矮边墙与边墙连接处经常出现渗、漏水等质量通病问题,可在一定程度上降低隧道的施工成本,同样也可以在国内公路隧道施工中参考使用。但由于该施工技术是隧道施工的新技术、新方法,还需要通过大量的类似工程实践的检验而逐步完善。

Research purposes： Based on the review of the tunnel construction method, the discussion is made on necessities of improvement and innovation of the construction method for secondary lining of tunnel and the introduction is given to the improved construction technology and method for secondary lining of the low wall and primary filling of the side arch of tunnel for the purposes of improving the concrete quality and reducing the construction cost. Research conclnsions：The improved and innovative construction method for secondary lining of railway tunnel simplifies the construction procedure. The problems of bad outlook of secondary lining and water penetrating and leaking in the joint of low wall with side wall can be overcome and the tunnel construction cost can be reduced by adopting these construction technologies. These technologies also can be used in construction of highway tunnel. However, as the new technologies, these technologies need to be verified and improved in more construction practiced.