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中文摘要：
建筑深基坑支护工程广泛采用内支撑结构，内支撑体系在拆除时的工作状态是考验基坑安全性的一个重要阶段。论文以具体工程为例，介绍内支撑体系的布置、拆除换撑工艺，对拆除过程所监测的轴力、立柱位移等数值变化进行详细分析，对拆除过程的应力应变和位移进行动态监测和分析，并指导施工的进行，是保障基坑安全性的重要手段。
英文摘要：
Inner support structure is widely used in support engineering of deep foundation pit. The inner support system work status in the demolishing is important for foundation pit safety. Taking an engineering project as an example, the paper introduced the arrangement of support system and the process of demolishing and exchanging supports, The detail analysis was made on the changes of axial force and colunm displacement and so on by monitoring them in the demolishing. It illustrated that the dynamic monitoring and analysis of stress strain and displacement in the process of demolishing could not only guide the construction, hut also ensure the safety of foundation pit.
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