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| 双向八车道连拱隧道中墙临时支护优化分析 | |
| 引用本文： | 许崇帮,夏才初,王华牢.双向八车道连拱隧道中墙临时支护优化分析[J].地下空间与工程学报,2010,6(4). |
| 作者姓名： | 许崇帮 夏才初 王华牢 |
| 作者单位： | 1. 同济大学,地下建筑与工程系,上海,200092;交通运输部公路科学研究院,北京,100088 2. 同济大学,地下建筑与工程系,上海,200092;同济大学,岩土及地下工程教育部重点实验室,上海,200092 3. 交通运输部公路科学研究院,北京,100088 |
| 基金项目： | 国家自然科学基金项目 |
| 摘 要： | 在连拱隧道中,中墙作为隧道的主要承载结构一直是设计和施工的重点。同时由于隧道地质条件和施工组织的复杂性,中墙常受到地层偏压和施工偏压两种偏压的共同作用,致使中墙内部力学状态十分复杂。施工偏压和地层偏压对中墙的影响机理互不相同,在施工过程中采取的控制措施也各不相同。利用有限元数值计算法对金鸡山双向八车道连拱隧道Ⅴ级围岩的6种施工方案进行了模拟,分析和阐述了中墙偏压产生的原因和影响因素;并结合6种施工方案的数值计算结果,对地层偏压、施工偏压对中墙影响过程进行了分析,结果表明地层偏压主要对中墙上部产生影响,而施工偏压不仅对中墙上部产生影响,而且还对中墙下部产生影响;最后,根据两种临时支护形式下中墙最终水平位移的计算结果,给出了控制中墙偏压的最佳临时支护形式。 |
| 关 键 词： | 连拱隧道 支护结构 中墙 偏压 数值模拟 |
Optimization Analysis for Temporary Support of Mid-partition of Multiple-arch Tunnel with Eight Traffic Lanes |
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| Xu Chongbang,Xia Caichu,Wang Hualao.Optimization Analysis for Temporary Support of Mid-partition of Multiple-arch Tunnel with Eight Traffic Lanes[J].Chinese Journal of Underground Space and Engineering,2010,6(4). | |
| Authors: | Xu Chongbang Xia Caichu Wang Hualao |
| Affiliation: | Xu Chongbang1,2,Xia Caichu1,3,Wang Hualao2 (1.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China,2.Research Institute of Highway Ministry of Transport,Beijing 100088,3.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,China) |
| Abstract: | The mid-partition of a multiple-arch tunnel is a very important part and attracts much attention in tunnel designing and constructing as it is a main support structure of the tunnel.Meanwhile,due to the complexity of geological condition and construction procedures,the mid-partition is always subjected to eccentric compression from both geological conditions and construction,which produce a very sophisticated mechanical state in mid-partition.The mechanism of influences which from these two kinds of eccentr... |
| Keywords: | multiple-arch tunnel supporting structure mid-partition eccentric compression numerical simulation |
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