深基坑分层开挖对邻近盾构隧道的影响分析被引量：1

INFLUENCE STUDY OF DEEP STAGE EXCAVATION ON ADJACENT SHIELD TUNNELS

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摘要基坑工程的施工经常出现在已建盾构隧道的附近,从而必然使已建隧道产生附加变形。为了研究基坑开挖对邻近已建盾构隧道的影响,通过有限元软件PLAXIS针对某深基坑开挖对邻近地铁隧道的影响进行了一系列的模拟,土体本构模型采用PLAXIS小应变土体硬化模型。分析表明:基坑开挖将对邻近隧道产生很大的影响,盾构隧道不仅在水平方向会发生较大的位移,而且在竖直方向也会发生一定的沉降且沉降量不能忽视。 In urban area, deep excavations may be constructed in the vicinity of existing shield tunnel. The existing tunnel will inevitably undergo additional displacements induced by the nearby excavation. To investigate the influence of deep excavation on existing tunnel, numerical analysis is performed using finite element code PLAXIS. The PLAXIS Haredning Soil Small Model as an advanced model is employed to simulate the behavior of soil. The results indicate that the deep excavation has a significant effect on the nearby tunnel.

作者曹平刘印汪俊波

机构地区烟建集团有限公司同济大学岩土及地下工程教育部重点实验室

出处《建筑技术开发》 2012年第5期6-9,共4页 Building Technology Development

关键词基坑盾构隧道数值模拟 deep excavation shield tunnel numerical analysis

分类号 TU473.2 [建筑科学—结构工程]

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