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Building Deformation Prediction Based on Ground Surface Settlements of Metro-Station Deep Excavation

机译：基于地铁车站深基坑地面沉降的建筑物变形预测

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摘要

Building deformations are not only closely related to the distance from the building to metro-station excavation but also related to the relative positions of the building and metro-station excavation. Building deformations can be predicted using ground surface settlement profiles. Based on typical geological parameters of Nanjing metro-station excavation, ground surface settlements were numerically simulated by auxiliary planes perpendicular and parallel to the excavation and by angled auxiliary planes at the excavation corner. Results show that the ground surface settlement profiles in auxiliary planes are closely related to the relative positions of the auxiliary planes and the metro-station excavation. Partitioning of ground surface settlements was proposed according to the three types of ground surface settlement profiles; furthermore, bending deformation and torsional deformation regularities of surrounding buildings were analyzed, and an estimation method for building settlements was developed. Finally, field-monitored settlement data of 21 buildings in different zones were compared with the estimated settlement data, and the application of the settlement estimation method to different types of foundations was analyzed. The results of this study can serve as reference for metro-station deep excavation construction and protection of surrounding buildings.
机译：建筑物变形不仅与从建筑物到地铁站开挖的距离密切相关，而且还与建筑物和地铁站开挖的相对位置有关。可以使用地面沉降曲线来预测建筑物的变形。根据南京地铁车站开挖的典型地质参数，通过垂直和平行于开挖的辅助平面以及开挖角处的倾斜辅助平面，对地表沉降进行了数值模拟。结果表明，辅助平面的地表沉降曲线与辅助平面的相对位置和地铁车站的开挖密切相关。根据地表沉降的三种类型，提出了地表沉降的分区方法。此外，分析了周围建筑物的弯曲变形和扭转变形的规律性，并提出了建筑物沉降的估算方法。最后，将不同区域内21座建筑物的现场监测沉降数据与估算沉降数据进行了比较，并分析了沉降估算方法在不同类型地基中的应用。研究结果可为地铁车站的深基坑施工和周围建筑物的保护提供参考。

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