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目前市政建设中,盾构法暗挖隧道得到了广泛的运用。然而,地下施工将引起地表沉降,使邻近建筑和管线受到不同程度的影响。 作者以上海地铁为工程背景,把数值分析理论应用于这一研究领域,推导出一套利用试验段实测数据推算出在整条隧道的施工中可能产生的地面沉降的计算方法。由它推算的沉降纵向分布曲线能较真实地反映各种情况下盾构推进引起地面沉降的规律。经对实测曲线比较,由它预测的沉降曲线基本符合实际情况。 数值理论预测沉降的方法依赖于施工过程中的实测数据,其反映的是施工阶段的沉降。这种方法适用于施工进行过程中的沉降预测,并有助于分析各种施工参数推进引起的地面沉降规律。
In the current municipal construction, shield tunneling method has been widely used. However, underground construction will cause surface subsidence and affect neighboring buildings and pipelines to varying degrees. Based on the Shanghai Subway project, the author applies numerical analysis theory to this research field and deduces a set of calculation method that uses the experimental data to calculate the possible ground subsidence in the whole tunnel construction. The subsidence longitudinal distribution curve deduced by it can more accurately reflect the law of land subsidence caused by shield propulsion under various conditions. After comparing the measured curve, the settlement curve predicted by it basically meets the actual situation. The numerical theory predicts the settlement method depends on the measured data in the construction process, which reflects the settlement during the construction phase. This method is suitable for the prediction of settlement in the process of construction and helps to analyze the law of land subsidence caused by various construction parameters.