| 隧道降水施工对既有市政管线隧道影响研究 |
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| 引用本文： | 贾媛媛,路军富,魏龙海,崔光耀. 隧道降水施工对既有市政管线隧道影响研究[J]. 水文地质工程地质, 2010, 37(6): 43-49 |
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| 作者姓名： | 贾媛媛 路军富 魏龙海 崔光耀 |
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| 作者单位： | 西华大学建筑与土木工程学院;成都理工大学地质灾害防治下地质环境保护国家重点实验室;中交第二公路规划勘察设计研究院;西南交通大学土木工程学院; |
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| 摘 要： | 针对成都某新建铁路隧道近接下穿既有市政管线隧道的降水施工方案,运用有限差分法和流固耦合理论,分析研究了降水施工过程中,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:距离降水井约50m范围内,地表沉降量变化显著,易发生差异沉降;既有管线隧道初期与二衬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,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,初期支护和二次衬砌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且最大拉应力超过了混凝土的极限抗拉强度。由此可知,降水施工对上部市政管线隧道的影响较大,降水施工前应采取一定的特殊辅助措施,以保证隧道结构安全性。
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| 关 键 词： | 既有市政隧道 降水施工 数值模拟 力学特性 |
Research on the influence of the tunnel dewatering construction on existed municipal pipeline tunnel |
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| JIA Yuan-yuan,LU Jun-fu,WEI Long-hai,CUI Guang-yao. Research on the influence of the tunnel dewatering construction on existed municipal pipeline tunnel[J]. Hydrogeology and Engineering Geology, 2010, 37(6): 43-49 |
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| Authors: | JIA Yuan-yuan LU Jun-fu WEI Long-hai CUI Guang-yao |
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| Affiliation: | 1.School of Architecture and Civil Engineering,Xihua University,Chengdu 610039,China;2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chongdu University of Technology,Chengdu 610059,China;3.The Second Highway Survey,Design and |
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| Abstract: | Based on the dewatering construction design of a new railway tunnel construction in up-down cross existing municipal pipeline tunnel in Chengdu,this paper demonstrates the stressing characteristics and displacement of existing municipal pipeline tunnel in the process of dewatering construction with the theory of Fluid-Mechanical coupling of finite discrete method(FDM).The study shows that the value of ground settlement showed significant change and the differential settlement is easy to occur in... |
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