| 高地应力软岩隧道超前洞室断面优化模拟研究 |
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| 引用本文： | 马伟斌,张梅,赵有明,刘艳青,郭小雄,付兵先.高地应力软岩隧道超前洞室断面优化模拟研究[J].铁道工程学报,2011(9):58-62. |
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| 作者姓名： | 马伟斌 张梅 赵有明 刘艳青 郭小雄 付兵先 |
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| 作者单位： | 1. 中国铁道科学研究院铁道建筑研究所,北京,100081
2. 铁道部工程管理中心,北京,100844 |
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| 基金项目： | 中国铁道科学研究院院基金项目(10SKL123T124) |
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| 摘 要： | 研究目的:为解决在建兰渝铁路高地应力软岩隧道大变形问题,针对其地质条件复杂和影响因素多变的特点,提出在隧道断面内设置超前小导洞的方案,利用小导洞的可变形性,将地层高地应力提前释放,使正洞开挖时处于可接受的相对低应力状态。本文采用数值模拟的方法确定了合理的超前导洞位置、尺寸与断面形状。研究结论:以毛羽山隧道为研究对象,采用有限差分程序对超前导洞不同位置、尺寸及断面形状等工况的释放率分别进行了数值模拟,考虑施工组织、工程造价以及释放效果等综合因素,确定出了合理的断面形状与导洞位置,即导洞尺寸为:7.6 m(宽)×5.5 m(高),导洞拱顶距正洞拱顶距离为2.5 m。对应正洞A、BB’、CC’、DD’释放率分别为37%、54%、72%和59%。可为其他类似工程的施工与设计提供参考依据。
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| 关 键 词： | 高地应力 软岩 应力释放 断面优化 释放率 |
Simulation Study on the Section Optimization of the Super Pilot Tunnel in High Geo- stress Tunnel |
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| MA Wei-bin,ZHANG Mei,ZHAO You-ming,LIU Yan-qing,GUO Xiao-xiong,FU Bing-xian.Simulation Study on the Section Optimization of the Super Pilot Tunnel in High Geo- stress Tunnel[J].Journal of Railway Engineering Society,2011(9):58-62. |
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| Authors: | MA Wei-bin ZHANG Mei ZHAO You-ming LIU Yan-qing GUO Xiao-xiong FU Bing-xian |
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| Institution: | MA Wei-bin1,ZHANG Mei2,ZHAO You-ming1,LIU Yan-qing1,GUO Xiao-xiong1,FU Bing-xian1 (1.China Academy of Railway Sciences,Beijing 100081,China,2.The Engineering Management Center of Ministry of Railways,Beijing 100844,China) |
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| Abstract: | Research purposes: In order to solve the problem of the large deformation in high geo-stress tunnel of ongoing lanzhou-chongqing railway,according to the characteristic of the complex geological conditions and changeable influencing factors,the high in-situ stress in the right hole was released in advance by using deformability of the super pilot tunnel,under these conditions,the right hole was in acceptable low-stress state when it was excavated,which was potengoally less the input of support rigidity.This... |
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| Keywords: | high ground stress soft rock stress releasing section optimization release rate |
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