| 基于关键块体理论的隧道分部施工时空效应 |
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| 引用本文： | 陈孝湘,夏才初,缪圆冰.基于关键块体理论的隧道分部施工时空效应[J].长安大学学报(自然科学版),2011(2):57-62. |
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| 作者姓名： | 陈孝湘 夏才初 缪圆冰 |
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| 作者单位： | 福建省电力勘测设计院;同济大学地下建筑与工程系;福建省交通规划设计院; |
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| 基金项目： | 国家自然科学基金项目(50579088) |
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| 摘 要： | 分部台阶施工的隧道开挖所形成关键块体因不同工序下临空面的位置、大小及开挖时机的不同而存在时空效应。阐述了关键块体时空效应的概念,并以福州长乐国际机场高速公路二期双向8车道特大跨度连拱隧道为依托,给出了时空效应概念及其工程应用;提出了关键块体所产生的时空效应应用的基本原则。结果表明:在采用双侧壁导坑施工的隧道中,预留核心部分岩体有利于隧道顶部块体的稳定;隧道施工时,减小开挖临空面面积能有效控制关键块体的体积,及时支护能减小因蠕变而导致的块体节理面力学性质的削弱;以时空效应应用基本原则为指导,将其应用于隧道开挖过程可省去部分临时支护,同时可提高隧道施工的安全性和经济性。
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| 关 键 词： | 隧道工程 岩石隧道 关键块体 施工工序 时空效应 |
Time-space effect in fractional steps construction tunnels by key block theory |
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| CHEN Xiao-xiang,XIA Cai-chu,MIAO Yuan-bing.Time-space effect in fractional steps construction tunnels by key block theory[J].JOurnal of Chang’an University:Natural Science Edition,2011(2):57-62. |
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| Authors: | CHEN Xiao-xiang XIA Cai-chu MIAO Yuan-bing |
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| Institution: | CHEN Xiao-xiang1,XIA Cai-chu2,MIAO Yuan-bing3 (1.Fujian Electric Power Survey and Design Institute,Fuzhou 350003,Fujian,China,2.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,3.Fujian Communications Planning and Design Institute,Fuzhou 350004,China) |
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| Abstract: | The key block's time-space effect is existed because of the location or the size and the time of the key block when the tunnel was excavated in fractional steps construction.The definition of time-space effect of the key block is described,and then based on the Jinjishan tunnel which is extra-large eight spans multi-arch tunnel in the second stage of the Fuzhou Changle international airport highway project,the definition and the application of the time-space effect is explained in detail.The basic applicati... |
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| Keywords: | tunnel engineering rock tunnel key block construction procedure time-space effect |
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