| 大跨度浅埋黄土隧道下穿既有高速公路施工技术 |
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| 引用本文： | 虞传海,;张治国.大跨度浅埋黄土隧道下穿既有高速公路施工技术[J].石家庄铁路工程职业技术学院学报,2014(2):16-20. |
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| 作者姓名： | 虞传海 ;张治国 |
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| 作者单位： | [1]北京铁城建设监理有限责任公司,北京100855; [2]中铁五局集团一公司,湖南长沙410117 |
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| 摘 要： | 新建兰新第二双线高速铁路西宁隧道断面大、埋深浅、围岩为湿陷性黄土、卵石土,地下水丰富,下穿既有兰西高速公路,地质条件复杂,为铁道部一级风险管理隧道,施工难度国内罕见。施工中采用大管幕超前预支护,双侧壁导坑法施工,辅以洞内降水等措施,最终得以安全顺利完成下穿施工任务,取得显著地社会和经济效益。为复杂地质条件下,下穿高速公路隧道施工提供了经验借鉴。
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| 关 键 词： | 浅埋隧道 大管幕超前支护 双侧壁导坑法 |
Construction Technology of Large Span and Shallowly Buried Tunnel through Existing High Way |
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| Institution: | YU Chuan-hai, ZHANG Zhi-guo,(Beijing Tiecheng Construction Supervision Co., ltd Beijing 100855 No.1 Engineering Corporation Limited of China Railway 5th Bureau Group Co. Ltdz＇ Changsha Hunai 410117 China) |
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| Abstract: | The tunnel of the second Lanzhou-Xinjiang double track high speed railway in Xining is under the top risk management of the Ministry of Railways. It has a large tunnel section and is shallowly buried. Its surrounding rocks are the collapsible loess and cobble soil. There is rich underground water. It needs to cross through the existing Lanzhou-Xi＇an high speed railway, which makes its construction very difficult. In the construction, large pipe roof was used for the pre-support, and pilot tunnel method was used in the construction of the side walls. Finally the construction was completed safely and smoothly, which will provide reference for the similar tunnel construction. |
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| Keywords: | Shallowburied tunnel Bassoon curtain forepoling Double side heading method |
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