| 全风化花岗岩地层超大变断面隧道拱墙衬砌施工关键技术研究 |
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| 引用本文： | 洪军.全风化花岗岩地层超大变断面隧道拱墙衬砌施工关键技术研究[J].路基工程,2018,0(4):212-216. |
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| 作者姓名： | 洪军 |
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| 作者单位： | 赣龙复线铁路有限责任公司, 福建龙岩 364000 |
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| 摘 要： | 赣龙铁路新考塘隧道出口处于全风化花岗岩富水地层，开挖跨度大且处于渐变段，最大开挖跨度30.3 m，最大开挖断面396 m2，因衬砌断面多次变化，二次衬砌混凝土结构施工技术的选择，对于安全、经济、快速施工具有十分重要的意义。基于以上背景，对超大变截面隧道的拱墙衬砌施工关键技术进行了研究。通过研究形成了由主、副门架组成的超大体量、可变断面二次衬砌台车，并开发应用了防水板台车与二次衬砌台车的一体化技术，实现了超大变截面隧道拱墙衬砌混凝土结构经济、快速、安全的施工。目前，新考塘隧道已施工完毕
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| 关 键 词： | 全风化花岗岩地层 超大变断面 隧道工程 拱墙衬砌 施工技术 |
| 收稿时间： | 2019-11-10 |
Study on Key Technologies of the Construction of the Super Large Variable Cross-section Tunnel Arch Wall Lining in Completely Weathered Granite Stratum |
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| Abstract: | The excavation span of the new Kaotang tunnel exit on Ganlong Railway in the fully weathered granite water-rich stratum is large and in the transition section. The biggest excavation span is 30.3 m and the biggest excavation section is 396 m2. The choice of the construction technology of the secondary lining concrete structure is important to safe, economic and rapid construction because the lining section has been changed several times. Based on the above background, the key construction technology of the super large variable cross section tunnel arch wall lining is studied. A super large volume and variable section secondary lining trolley which consists of main and secondary portal was formed and the integrated technology of waterproof trolley and secondary lining trolley were developed and applied, which made the construction of the super large variable cross section tunnel arch wall lining concrete structure under a safe, rapid and economic environment possible. At present, the new Kaotang Tunnel has been completed and put into operation. It is proved that the construction technology of the super large variable cross section tunnel arch wall lining is feasible and reasonable, which can provide reference for similar construction. |
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