一种盾构掘进引起地表沉降的实用预测方法

盾构隧道施工中，提前预知盾构影响范围内的地表沉降情况对减少施工对既有建筑物的危害是有帮助的。Peck法公式用于描述隧道掘进引起地表沉降分布曲线已经被工程界广为接受，但地层损失一般从工程经验中获得，导致该理论在实践中应用受限。基于实测沉降数据，用最小二乘法求解地层损失，并且对Peck法公式进行了拓展，建立了一种用于预测盾构影响范围内地表沉降情况的实用方法。并编制了可视化的电算程序，工程实例表明，该方法行之有效。

A practical approach for predicting surface settlements induced by shield tunneling

During shield tunneling, it is helpful to predict surface settlements near the shield machine for protecting preexisting structures from damage. Gaussian equation is accepted widely by engineers to describe the surface settlements induced by shield tunneling, but ground loss is derived from the engineering experience, so that this method is subjected to limitation in practice. The ground loss is derived by the least square method based on observed surface settlements; the Peck formula is extended to establish a new approach to predict the surface settlements near the shield machine. A visual program is written based on this new approach, which is proved to be dependable by a real example.