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| 高速铁路隧道近接施工对既有市政隧道影响分析 | |
| 引用本文： | 路军富,贾媛媛,魏龙海.高速铁路隧道近接施工对既有市政隧道影响分析[J].郑州大学学报(工学版),2011,32(5). |
| 作者姓名： | 路军富 贾媛媛 魏龙海 |
| 作者单位： | 1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都,610059 2. 西华大学,建筑与土木工程学院,四川成都610039 3. 中交第二公路规划勘察设计研究院,湖比武汉,430056 |
| 基金项目： | 四川省青年科技基金资助项目(09ZQ026-083) |
| 摘 要： | 针时成都某新建城际铁路隧道近接下穿既有市政管线隧道的设计和施工方案,运用有限差分法和流固耦合理论,分析研究了降水以及新建隧道施工过程中,上部既有市政管线隧道的受力特性及位移变化规律,研究结果表明:既有管线隧道衬砌结构应力和位移变化及分布规律几乎一致,交叉处界面位移最大,并沿隧道纵向向两端逐渐减小且呈对称分布；交叉处30m范围内,拱顶纵向应力主要为负值即压应力,仰拱纵向应力主要为正值即拉应力；降水施工对上部市政管线隧道的影响远大于新建隧道施工造成的影响,前者所引起的沉降约占75％～80％,后者所引起的沉降约占20％～25％；降水施工所引起的纵向最大拉应力为新建隧道施工引起的1.39 ～ 3.39倍.所以,降水施工前应采取一定的特殊辅助措施,以保证降水施工时结构安全性. |
| 关 键 词： | 既有市政隧道 近接施工 降水施工 力学特性 |
Study on the Influence of the Tunnel of High-speed Railway Adjacent Excavation on Existing Municipal Tunnel |
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| LU Jun-fu , JIA Yuan-yuan , WEI Long-hai.Study on the Influence of the Tunnel of High-speed Railway Adjacent Excavation on Existing Municipal Tunnel[J].Journal of Zhengzhou University: Eng Sci,2011,32(5). | |
| Authors: | LU Jun-fu JIA Yuan-yuan WEI Long-hai |
| Affiliation: | LU Jun-fu1,JIA Yuan-yuan2,WEI Long-hai3(1.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China,2.School of Architecture and Civil Engineering,Xihua University,Chengdu 610039,3.The Second Highway Survey Design and Research Institute,China Communications,Wuhan 430056,China) |
| Abstract: | Based on the design and construction of a new intercity railway tunnel construction in up-down cross existing municipal pipeline tunnel in Chengdu,the stress characteristics and displacement law of existing municipal pipeline tunnel in the process of dewatering construction and tunnel adjacent excavation were demonstrated with theory of fluid-solid coupling of finite discrete method(FDM).The study results show that the variation and distribution of stress and displacement of primary support and secondary li... |
| Keywords: | existing municipal tunnel close-space construction dewatering construction mechanical characteristics |
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