粉质黏土深基坑开挖变形特征研究

Research on Deformation Characteristics of Deep Foundation Pits in Silt Clay

深基坑开挖过程中的地表及支护结构是重要变形监测对象,对于确保工程施工安全至关重要。选取济南黄河隧道盾构工作井基坑工程作为研究对象,开展粉质黏土地层条件下基坑变形实测数据与数值模拟结果对比分析,系统分析粉质黏土地质条件下深基坑开挖过程中的变形特性。研究结果表明,数值模拟结果与现场监测数据在变形特征上展现出良好的一致性,验证了数值模拟方法在预测粉质黏土深基坑变形方面的准确性和可靠性。不仅深化了对粉质黏土深基坑变形机制的理解,也为类似地质条件下的工程实践提供参考和指导。

The deformation of the ground surface and the support structure during the deep foundation pit excavation process is an important monitoring object,which is crucial to ensuring the safety of construction.This paper takes the foundation pit engineering of the Jinan Yellow River Tunnel shaft as the research object,and carries out a comparative analysis of the measured data and numerical simulation of the foundation pit deformation under the condition of silt clay soil layer.The study systematically analyzed the deformation characteristics of deep foundation pits in silt clay geological conditions during the excavation process.The results show that the numerical simulation results are consistent with the field monitoring data in terms of deformation characteristics,verifying the accuracy and reliability of the numerical simulation method in predicting the deformation of deep foundation pits in silt clay.This not only deepens the understanding of the deformation mechanism of deep foundation pits in silt clay,but also provides important reference and guidance for engineering practice in similar geological conditions.