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在地铁隧道附近施工灌注桩、地下连续墙以及开挖基坑将改变隧道周围土体应力状态 ,使隧道发生变形和变位 ,直接影响隧道的使用功能和地铁的运行安全。该文结合上海市一个典型工程实例 ,分别对隧道沿线施工灌注桩 /地下连续墙、隧道旁侧开挖深基坑以及隧道上部开挖基坑引起的隧道变形及变位监测数据进行分析。结果表明 ,这 3种施工行为对隧道变形及变位的影响各有特点 ,在工程实践中应予以高度重视 ,从而保证地铁的安全
The construction of cast-in-situ piles, underground continuous walls and excavation foundation pit near the subway tunnel will change the stress state of the soil around the tunnel, causing deformation and displacement of the tunnel and directly affecting the service function of the tunnel and the operational safety of the subway. Based on a typical example in Shanghai, this paper analyzes the data of tunnel deformation and displacement monitoring caused by the construction of cast-in-situ piles / underground continuous walls along the tunnel, deep excavation beside the tunnel and excavation of the upper excavation of tunnel. The results show that these three kinds of construction behaviors have their own characteristics on the deformation and displacement of the tunnel. They should be highly valued in the engineering practice so as to ensure the safety of the subway