无门架导洞法隧道挑顶施工技术研究
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摘要
结合成兰铁路榴桐寨隧道一号横洞挑顶工程实例,介绍一种隧道挑顶新技术——无门架导洞挑顶法。通过优化挑顶交叉段拱架连接,巧妙地解决了挑顶过程中交叉段正洞拱架拱脚落点支撑问题,既保留了门架导洞挑顶法安全、快速的特点,又避免了门架导洞挑顶法的一些缺陷。该技术明显优于隧道挑顶普遍采用的门架导洞法施工技术,为类似工程提供参考,值得推广应用。
In this paper,a new technology of tunnel portal excavation,namely,non-roof pilot method is introduced. By optimizing the connection of the top cross-section arch,this paper has solved the problem of the arch support sites of the cross-section in the process of roof ripping construction. The safety and fast characteristics of the door frame guiding-hole are preserved,and some defects of the method are avoided. This technique is obviously superior to the construction technology of the door frame guiding-hole,which is generally adopted in the tunnel. It is a reference for similar projects,and it is worth popularizing.
In this paper,a new technology of tunnel portal excavation,namely,non-roof pilot method is introduced. By optimizing the connection of the top cross-section arch,this paper has solved the problem of the arch support sites of the cross-section in the process of roof ripping construction. The safety and fast characteristics of the door frame guiding-hole are preserved,and some defects of the method are avoided. This technique is obviously superior to the construction technology of the door frame guiding-hole,which is generally adopted in the tunnel. It is a reference for similar projects,and it is worth popularizing.
引文
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[2]束仁政.榴桐寨隧道1#横洞挑顶施工技术[J].科技资讯,2015(11):89.
[3]白露.软弱围岩隧道斜井转正洞设计与施工技术[J].建筑技术开发,2016(11):54-55.
[4]袁哲,李庆广,鹿广.特大断面隧道挑顶施工关键技术[J].公路,2017(9):49-51.
[5]易维.红石岩隧道挑顶技术研究[J].山东工业技术,2016(21):131-132.
[6]骆岗.铁路隧道横洞转正洞的施工技术[J].工程建设与设计,2016(5):122-123.
[7]帅建国.隧道工程“三台阶七步开挖法”快速施工[J].建筑施工,2011(11):1019-1021.
[8]魏彪平,刘阳.垂直挑顶进入正洞工法研究[J].隧道施工技术,2007(S1):151-153.
[9]宋金贵.横洞进正洞交叉口设计优化方案研究[J].隧道建设,2017(S1):168-173.
[10]邓启华,王友军,姚日高.富水隧道V级围岩双车道斜井进正洞挑顶施工技术[J].铁道建筑技术,2014(4):95-98.
[11]马双来.一种软岩隧道斜井进正洞交叉口挑顶技术[J].铁道建筑技术,2014(3):297.
[12]张朝阳,王毅军,崔师强.软岩地段双线隧道挑顶施工技术[J].铁道建筑技术,2012(1):95.