摘要
为确保高层建筑合理设计及稳定性评价,文中结合项目区域地质条件,开展地基土承载力分析,并通过沉降监测和预测,开展建筑沉降趋势研究.结果表明,随着深度变化,不同地层分布厚度、承载力存在明显差异.结合基坑开挖深度,卵石层的层厚为5.5 m,加之均匀性较好,承载力高,其埋深也符合设计要求,因此,将其作为基础持力层是合理的.通过监测,9 个监测点的沉降变形值为26.29～50.27 mm,在变形控制值范围内,经变形预测,建筑沉降呈小速率增加特征,沉降预测值介于41.98～51.03 mm,沉降预测值也在控制值范围内,说明建筑沉降变形控制效果较好,这为高层建筑设计及稳定性评价提供了理论支持.
Abstract
To ensure the reasonable design and stability evaluation of high-rise buildings,this article first combines the geological conditions of the project area to conduct an analysis of the bearing capacity of the foundation soil,and conducts research on the trend of building settlement through settlement monitoring and prediction.The analysis results show that with the change of depth,there are significant differences in the distribution thickness and bearing capacity of different strata.Considering the excavation depth of the foundation pit,the layer thickness of the pebble layer is 5.5 m,and with good uniformity and high bearing capacity,its burial depth also meets the design requirements.Therefore,it is reasonable to use it as the foundation bearing layer.Through monitoring,the settlement deformation values of 9 monitoring points range from 26.29 to 50.27 mm,which is within the deformation control value range.Through deformation prediction,the building settlement shows a small rate of increase,with the predicted settlement values ranging from 41.98 to 51.03mm.The predicted settlement values are also within the control value range,indicating that the control effect of building settlement deformation has always been excellent,providing certain theoret-ical support for the design and stability evaluation of high-rise buildings.
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