海底复杂环境下泥水盾构掘削面稳定性研究
摘要：针对盾构隧道海底带压换刀开挖面的稳定问题,以厦门轨道交通2号线跨海区间盾构隧道工程为依托,采用颗粒流方法对典型地层中带压换刀时开挖面的稳定性进行模拟分析,指导现场带压换刀位置的选择;针对跨海区间渗透性大的砂层,通过开展室内泥膜渗透试验,发现增加泥浆中的砂含量可降低渗入地层的浆液量,相同压力下相同材料配制的泥浆形成的泥膜渗透性能基本一致。
关键词：隧道工程海底隧道盾构泥水盾构掘削面稳定性泥膜试验
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[3] 陈仁朋,李君,陈云敏,等.干砂盾构开挖面稳定性模型试验研究[J].岩土工程学报,2011,33(1):117-122.
[4] 刘泉维,杨忠年.泥水平衡盾构开挖面稳定性模型试验研究[J].岩土力学,2014,35(8):2255-2260.
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Study on Stability of Excavation Surface of Slurry Shield Tunneling Under Complex Seabed Environment
Abstract: Based on the stability problem of the excavation surface of shield tunnel for tool changing with pressure under the sea relying on cross-sea section of Xiamen Rail Transit line 2 shield tunnel project, the grain flow method is used to simulate and analyze the stability of excavation face in typical formation, which guides the choice of the location of tool changing with pressure. By conducting indoor slurry membrane penetration test of sand layer, the authors find that increasing the sand content in the mud can reduce the amount of slurry infiltration capacity. The slurry membrane permeability of the same mix material under the same fluid pressure are basically identical.
Keywords: tunnels; undersea tunnels; shields; mud water shields; excavation surface; stability; slurry membrane test
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