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地铁施工段地表沉降预测是地铁施工及周边建筑物安全评价的基础。结合某工程实例,运用Logistic模型分析了适用于基坑地表沉降变形监测的动态预测模型,对模型的预测结果进行了分析和检验,从而验证了该模型应用在地铁车站基坑变形监测中的可行性。基坑周边地表沉降监测结果表明,基坑开挖会造成一定范围的地表沉降,对此提出相应的保护措施。
Subway construction section surface subsidence forecast is the basis of subway construction and surrounding buildings safety evaluation. Combined with an engineering example, this paper analyzes the dynamic prediction model suitable for the monitoring of surface settlement of foundation pit by using Logistic model, and analyzes and tests the prediction results of the model, which verifies the feasibility of this model in the deformation monitoring of foundation pit of subway station Sex. The monitoring results of surface subsidence around the foundation pit show that the foundation pit excavation will cause a certain range of surface subsidence, and the corresponding protection measures are proposed.