论文部分内容阅读
基坑施工卸载加载必然引起基底隆起再沉降,从而造成下卧地铁盾构隧道位移和内力的变化,影响地铁的正常使用和运营。本文结合无锡某建成地铁盾构隧道上方大面积深基坑开挖实例,采用有限元法模拟了基坑开挖卸载加载对下卧地铁盾构隧道影响的分析.根据分析结果,优化调整既有上部结构设计方案,提出合理安全有效的设计施工改进措施,为类似的工程提供了一些理论指导和工程经验。
The unloading and loading of foundation pit construction inevitably causes the baselift and then subsidence, resulting in the displacement and internal force changes of the shield tunnel under the subway, affecting the normal operation and operation of the subway. In this paper, an example of excavation of a large area deep foundation pit above a subway shield tunnel in Wuxi is established, and the influence of excavation loading and unloading on the shield tunnel of subsoil is simulated by finite element method.According to the analysis results, Superstructure design proposal, put forward a reasonable and safe and effective design and construction improvement measures for similar projects provide some theoretical guidance and engineering experience.