| 国铁站房深大基础上跨对地铁隧道变形的影响研究 |
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| 作者单位： | ;1.北京城建设计发展集团股份有限公司 |
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| 摘 要： | 为探明深大基础上跨地铁隧道施工对地铁隧道的影响,开展基坑上跨隧道施工过程的数值模拟分析及现场测试,结果表明:一方面站房荷载能够通过转换梁与桩基础有效地传递到隧道下方基础持力层处,同时桩基础的存在一定程度上约束了隧道变形;另一方面地层加固及分步开挖施作,能够有效减小隧道区域地层应力的释放与坑底隆起,保证地铁隧道运营安全。研究结果对类似工程有一定的参考价值。
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| 关 键 词： | 地铁隧道 深大基础 地基加固 变形控制 数值模拟 |
Research on Deformation Effect of Large and Deep Railway Station Foundation on Existing Underlying Metro Tunnel |
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| Institution: | ,Beijing Urban Construction Design and Development Group Co.Limited |
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| Abstract: | In order to find out the impact of railway station large and deep foundation on the existingmetro tunnel, numerical simulation and field test are conducted. The results show that building load canbe effectively transferred to foundation bearing layer through transfer beam and pile foundation,meanwhile, pile foundation restrains the deformation of the existing tunnel. On the other hand, foundationreinforcement and excavation by steps can reduce formation stress relief and the uplift of pit bottom. Theresearch results may provide references for similar projects. |
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| Keywords: | Metro tunnel Large and deep foundation Ground reinforcement Deformation control Numerical simulation |
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